From 7130fb9b7ae59db19641ff07362283f0d453828f Mon Sep 17 00:00:00 2001
From: Fridella <43757589+fdnt7@users.noreply.github.com>
Date: Sat, 8 Jun 2024 01:56:58 +0700
Subject: [PATCH] =?UTF-8?q?=F0=9F=92=9C=20Internals=20Overhaul=20(#18)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* Bumped to `0.7.0`, removed all `Deref`s, enabled LTO

* Internals Overhaul

* Introduced Flakes integrations, updated to `vergen-git2` `1.0.0-beta.2`
---
 .envrc                                        |   11 +-
 .gitignore                                    |    3 +-
 Cargo.lock                                    |  987 ++--
 Cargo.toml                                    |    3 +
 devenv.lock                                   |  161 -
 devenv.nix                                    |   73 -
 devenv.yaml                                   |    8 -
 flake.lock                                    |  482 ++
 flake.nix                                     |  116 +
 lavalink/application.yml                      |    2 +-
 lyra/Cargo.lock                               | 4115 -----------------
 lyra/Cargo.toml                               |   27 +-
 lyra/build.rs                                 |   19 +-
 lyra/src/bot/command.rs                       |    3 +-
 lyra/src/bot/command/check.rs                 | 1036 ++---
 lyra/src/bot/command/declare.rs               |   93 +-
 lyra/src/bot/command/model.rs                 |   55 +-
 lyra/src/bot/command/model/ctx.rs             |  255 +-
 .../src/bot/command/model/ctx/autocomplete.rs |    5 +-
 .../src/bot/command/model/ctx/command_data.rs |   50 +-
 lyra/src/bot/command/model/ctx/menu.rs        |   53 +-
 lyra/src/bot/command/model/ctx/message.rs     |    7 +-
 lyra/src/bot/command/model/ctx/modal.rs       |   13 +-
 lyra/src/bot/command/poll.rs                  |   60 +-
 lyra/src/bot/command/require.rs               |  203 +
 lyra/src/bot/command/util.rs                  |   83 +-
 lyra/src/bot/component/config/access.rs       |  116 +-
 lyra/src/bot/component/config/access/clear.rs |    6 +-
 lyra/src/bot/component/config/access/edit.rs  |  217 +-
 lyra/src/bot/component/config/access/mode.rs  |   11 +-
 lyra/src/bot/component/config/access/view.rs  |    7 +-
 lyra/src/bot/component/config/now_playing.rs  |   11 +-
 lyra/src/bot/component/connection.rs          |   13 +-
 lyra/src/bot/component/connection/join.rs     |   68 +-
 lyra/src/bot/component/connection/leave.rs    |   30 +-
 lyra/src/bot/component/queue.rs               |   50 +-
 lyra/src/bot/component/queue/clear.rs         |   26 +-
 lyra/src/bot/component/queue/fair_queue.rs    |   15 +-
 lyra/src/bot/component/queue/move.rs          |   43 +-
 lyra/src/bot/component/queue/play.rs          |  139 +-
 lyra/src/bot/component/queue/remove.rs        |   43 +-
 lyra/src/bot/component/queue/remove_range.rs  |   33 +-
 lyra/src/bot/component/queue/repeat.rs        |   32 +-
 lyra/src/bot/component/queue/shuffle.rs       |   21 +-
 lyra/src/bot/component/tuning.rs              |   61 +-
 lyra/src/bot/component/tuning/equaliser.rs    |    4 +-
 .../bot/component/tuning/equaliser/custom.rs  |   16 +-
 .../src/bot/component/tuning/equaliser/off.rs |   11 +-
 .../bot/component/tuning/equaliser/preset.rs  |   14 +-
 lyra/src/bot/component/tuning/filter.rs       |   29 +-
 .../bot/component/tuning/filter/all_off.rs    |   23 +-
 .../component/tuning/filter/channel_mix.rs    |   22 +-
 .../bot/component/tuning/filter/distortion.rs |   22 +-
 .../bot/component/tuning/filter/low_pass.rs   |   32 +-
 lyra/src/bot/component/tuning/filter/pitch.rs |   17 +-
 .../bot/component/tuning/filter/pitch/down.rs |   17 +-
 .../bot/component/tuning/filter/pitch/set.rs  |   20 +-
 .../bot/component/tuning/filter/pitch/up.rs   |   17 +-
 .../bot/component/tuning/filter/rotation.rs   |   22 +-
 .../bot/component/tuning/filter/tremolo.rs    |   20 +-
 .../bot/component/tuning/filter/vibrato.rs    |   20 +-
 lyra/src/bot/component/tuning/speed.rs        |   23 +-
 lyra/src/bot/component/tuning/volume.rs       |    3 +-
 lyra/src/bot/component/tuning/volume/down.rs  |   23 +-
 lyra/src/bot/component/tuning/volume/set.rs   |   24 +-
 .../component/tuning/volume/toggle_mute.rs    |   11 +-
 lyra/src/bot/component/tuning/volume/up.rs    |   30 +-
 lyra/src/bot/core/const.rs                    |  100 +-
 lyra/src/bot/core/model.rs                    |    6 +-
 lyra/src/bot/core/model/interaction.rs        |   46 +-
 lyra/src/bot/error.rs                         |    7 +
 lyra/src/bot/error/command.rs                 |   14 +-
 lyra/src/bot/error/command/check.rs           |    9 +-
 lyra/src/bot/ext/image.rs                     |   40 +-
 lyra/src/bot/ext/util.rs                      |   36 +-
 lyra/src/bot/gateway.rs                       |    2 +-
 lyra/src/bot/gateway/guild.rs                 |    3 +-
 lyra/src/bot/gateway/interaction.rs           |   52 +-
 lyra/src/bot/gateway/model.rs                 |    9 +-
 lyra/src/bot/gateway/shard.rs                 |    7 +-
 lyra/src/bot/gateway/voice.rs                 |    9 +-
 lyra/src/bot/lavalink.rs                      |    8 +-
 lyra/src/bot/lavalink/model.rs                |  236 +-
 lyra/src/bot/lavalink/model/connection.rs     |    9 +-
 lyra/src/bot/lavalink/model/queue.rs          |   83 +-
 lyra/src/bot/lavalink/plugin.rs               |    2 -
 lyra/src/bot/lavalink/track.rs                |    8 +-
 lyra/src/bot/runner.rs                        |   29 +-
 lyra_proc/Cargo.toml                          |    2 +-
 lyra_proc/src/config_access.rs                |    2 +-
 lyra_proc/src/model.rs                        |    9 -
 91 files changed, 3274 insertions(+), 6739 deletions(-)
 delete mode 100644 devenv.lock
 delete mode 100644 devenv.nix
 delete mode 100644 devenv.yaml
 create mode 100644 flake.lock
 create mode 100644 flake.nix
 delete mode 100644 lyra/Cargo.lock
 create mode 100644 lyra/src/bot/command/require.rs

diff --git a/.envrc b/.envrc
index 5bf8fc1..ac18306 100644
--- a/.envrc
+++ b/.envrc
@@ -1,3 +1,10 @@
-source_url "https://raw.githubusercontent.com/cachix/devenv/95f329d49a8a5289d31e0982652f7058a189bfca/direnvrc" "sha256-d+8cBpDfDBj41inrADaJt+bDWhOktwslgoP5YiGJ1v0="
+if ! has nix_direnv_version || ! nix_direnv_version 2.2.1; then
+  source_url "https://raw.githubusercontent.com/nix-community/nix-direnv/2.2.1/direnvrc" "sha256-zelF0vLbEl5uaqrfIzbgNzJWGmLzCmYAkInj/LNxvKs="
+fi
 
-use devenv
\ No newline at end of file
+nix_direnv_watch_file flake.nix
+nix_direnv_watch_file flake.lock
+if ! use flake . --impure
+then
+  echo "devenv could not be built. The devenv environment was not loaded. Make the necessary changes to devenv.nix and hit enter to try again." >&2
+fi
diff --git a/.gitignore b/.gitignore
index 360e650..d585425 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,8 +6,7 @@ lavalink/plugins
 lavalink/Lavalink.jar
 
 # Devenv
-.devenv*
-devenv.local.nix
+.devenv
 
 # direnv
 .direnv
diff --git a/Cargo.lock b/Cargo.lock
index 3a071ba..c8c5088 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -195,26 +195,6 @@ dependencies = [
  "alloc-stdlib",
 ]
 
-[[package]]
-name = "bstr"
-version = "1.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05efc5cfd9110c8416e471df0e96702d58690178e206e61b7173706673c93706"
-dependencies = [
- "memchr",
- "regex-automata 0.4.6",
- "serde",
-]
-
-[[package]]
-name = "btoi"
-version = "0.4.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9dd6407f73a9b8b6162d8a2ef999fe6afd7cc15902ebf42c5cd296addf17e0ad"
-dependencies = [
- "num-traits",
-]
-
 [[package]]
 name = "bumpalo"
 version = "3.16.0"
@@ -282,6 +262,11 @@ name = "cc"
 version = "1.0.98"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "41c270e7540d725e65ac7f1b212ac8ce349719624d7bcff99f8e2e488e8cf03f"
+dependencies = [
+ "jobserver",
+ "libc",
+ "once_cell",
+]
 
 [[package]]
 name = "cfg-if"
@@ -303,12 +288,6 @@ dependencies = [
  "windows-targets 0.52.5",
 ]
 
-[[package]]
-name = "clru"
-version = "0.6.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cbd0f76e066e64fdc5631e3bb46381254deab9ef1158292f27c8c57e3bf3fe59"
-
 [[package]]
 name = "color-eyre"
 version = "0.6.3"
@@ -418,9 +397,9 @@ checksum = "19d374276b40fb8bbdee95aef7c7fa6b5316ec764510eb64b8dd0e2ed0d7e7f5"
 
 [[package]]
 name = "crc32fast"
-version = "1.4.0"
+version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3855a8a784b474f333699ef2bbca9db2c4a1f6d9088a90a2d25b1eb53111eaa"
+checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
 dependencies = [
  "cfg-if",
 ]
@@ -469,6 +448,41 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "darling"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b750cb3417fd1b327431a470f388520309479ab0bf5e323505daf0290cd3850"
+dependencies = [
+ "darling_core",
+ "darling_macro",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "109c1ca6e6b7f82cc233a97004ea8ed7ca123a9af07a8230878fcfda9b158bf0"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "darling_macro"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4aab4dbc9f7611d8b55048a3a16d2d010c2c8334e46304b40ac1cc14bf3b48e"
+dependencies = [
+ "darling_core",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "dashmap"
 version = "5.5.3"
@@ -508,6 +522,37 @@ dependencies = [
  "powerfmt",
 ]
 
+[[package]]
+name = "derive_builder"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f59169f400d8087f238c5c0c7db6a28af18681717f3b623227d92f397e938c7"
+dependencies = [
+ "derive_builder_macro",
+]
+
+[[package]]
+name = "derive_builder_core"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4ec317cc3e7ef0928b0ca6e4a634a4d6c001672ae210438cf114a83e56b018d"
+dependencies = [
+ "darling",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "derive_builder_macro"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "870368c3fb35b8031abb378861d4460f573b92238ec2152c927a21f77e3e0127"
+dependencies = [
+ "derive_builder_core",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -538,12 +583,6 @@ dependencies = [
  "syn 1.0.109",
 ]
 
-[[package]]
-name = "dunce"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56ce8c6da7551ec6c462cbaf3bfbc75131ebbfa1c944aeaa9dab51ca1c5f0c3b"
-
 [[package]]
 name = "either"
 version = "1.12.0"
@@ -602,12 +641,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd2e7510819d6fbf51a5545c8f922716ecfb14df168a3242f7d33e0239efe6a1"
 
-[[package]]
-name = "faster-hex"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a2a2b11eda1d40935b26cf18f6833c526845ae8c41e58d09af6adeb6f0269183"
-
 [[package]]
 name = "fastrand"
 version = "2.1.0"
@@ -623,24 +656,6 @@ dependencies = [
  "simd-adler32",
 ]
 
-[[package]]
-name = "filetime"
-version = "0.2.23"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ee447700ac8aa0b2f2bd7bc4462ad686ba06baa6727ac149a2d6277f0d240fd"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall 0.4.1",
- "windows-sys 0.52.0",
-]
-
-[[package]]
-name = "finl_unicode"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8fcfdc7a0362c9f4444381a9e697c79d435fe65b52a37466fc2c1184cee9edc6"
-
 [[package]]
 name = "flate2"
 version = "1.0.30"
@@ -745,7 +760,7 @@ checksum = "87750cf4b7a4c0625b1529e4c543c2182106e4dedc60a2a6455e00d212c489ac"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
@@ -795,15 +810,16 @@ dependencies = [
 
 [[package]]
 name = "generator"
-version = "0.7.5"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5cc16584ff22b460a382b7feec54b23d2908d858152e5739a120b949293bd74e"
+checksum = "186014d53bc231d0090ef8d6f03e0920c54d85a5ed22f4f2f74315ec56cf83fb"
 dependencies = [
  "cc",
+ "cfg-if",
  "libc",
  "log",
  "rustversion",
- "windows 0.48.0",
+ "windows 0.54.0",
 ]
 
 [[package]]
@@ -827,6 +843,18 @@ dependencies = [
  "wasi",
 ]
 
+[[package]]
+name = "getset"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e45727250e75cc04ff2846a66397da8ef2b3db8e40e0cef4df67950a07621eb9"
+dependencies = [
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "gif"
 version = "0.13.1"
@@ -844,505 +872,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4271d37baee1b8c7e4b708028c57d816cf9d2434acb33a549475f78c181f6253"
 
 [[package]]
-name = "gix"
-version = "0.57.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6dd025382892c7b500a9ce1582cd803f9c2ebfe44aff52e9c7f86feee7ced75e"
-dependencies = [
- "gix-actor",
- "gix-commitgraph",
- "gix-config",
- "gix-date",
- "gix-diff",
- "gix-discover",
- "gix-features",
- "gix-fs",
- "gix-glob",
- "gix-hash",
- "gix-hashtable",
- "gix-index",
- "gix-lock",
- "gix-macros",
- "gix-object",
- "gix-odb",
- "gix-pack",
- "gix-path",
- "gix-ref",
- "gix-refspec",
- "gix-revision",
- "gix-revwalk",
- "gix-sec",
- "gix-tempfile",
- "gix-trace",
- "gix-traverse",
- "gix-url",
- "gix-utils",
- "gix-validate",
- "once_cell",
- "parking_lot",
- "signal-hook",
- "smallvec",
- "thiserror",
- "unicode-normalization",
-]
-
-[[package]]
-name = "gix-actor"
-version = "0.29.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da27b5ab4ab5c75ff891dccd48409f8cc53c28a79480f1efdd33184b2dc1d958"
-dependencies = [
- "bstr",
- "btoi",
- "gix-date",
- "itoa",
- "thiserror",
- "winnow 0.5.40",
-]
-
-[[package]]
-name = "gix-bitmap"
-version = "0.2.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a371db66cbd4e13f0ed9dc4c0fea712d7276805fccc877f77e96374d317e87ae"
-dependencies = [
- "thiserror",
-]
-
-[[package]]
-name = "gix-chunk"
-version = "0.4.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45c8751169961ba7640b513c3b24af61aa962c967aaf04116734975cd5af0c52"
-dependencies = [
- "thiserror",
-]
-
-[[package]]
-name = "gix-commitgraph"
-version = "0.23.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e8dcbf434951fa477063e05fea59722615af70dc2567377e58c2f7853b010fc"
-dependencies = [
- "bstr",
- "gix-chunk",
- "gix-features",
- "gix-hash",
- "memmap2",
- "thiserror",
-]
-
-[[package]]
-name = "gix-config"
-version = "0.33.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "367304855b369cadcac4ee5fb5a3a20da9378dd7905106141070b79f85241079"
-dependencies = [
- "bstr",
- "gix-config-value",
- "gix-features",
- "gix-glob",
- "gix-path",
- "gix-ref",
- "gix-sec",
- "memchr",
- "once_cell",
- "smallvec",
- "thiserror",
- "unicode-bom",
- "winnow 0.5.40",
-]
-
-[[package]]
-name = "gix-config-value"
-version = "0.14.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fbd06203b1a9b33a78c88252a625031b094d9e1b647260070c25b09910c0a804"
-dependencies = [
- "bitflags 2.5.0",
- "bstr",
- "gix-path",
- "libc",
- "thiserror",
-]
-
-[[package]]
-name = "gix-date"
-version = "0.8.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "367ee9093b0c2b04fd04c5c7c8b6a1082713534eab537597ae343663a518fa99"
-dependencies = [
- "bstr",
- "itoa",
- "thiserror",
- "time",
-]
-
-[[package]]
-name = "gix-diff"
-version = "0.39.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd6a0454f8c42d686f17e7f084057c717c082b7dbb8209729e4e8f26749eb93a"
-dependencies = [
- "bstr",
- "gix-hash",
- "gix-object",
- "thiserror",
-]
-
-[[package]]
-name = "gix-discover"
-version = "0.28.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8d7b2896edc3d899d28a646ccc6df729827a6600e546570b2783466404a42d6"
-dependencies = [
- "bstr",
- "dunce",
- "gix-hash",
- "gix-path",
- "gix-ref",
- "gix-sec",
- "thiserror",
-]
-
-[[package]]
-name = "gix-features"
-version = "0.37.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d50270e8dcc665f30ba0735b17984b9535bdf1e646c76e638e007846164d57af"
-dependencies = [
- "crc32fast",
- "flate2",
- "gix-hash",
- "gix-trace",
- "libc",
- "once_cell",
- "prodash",
- "sha1_smol",
- "thiserror",
- "walkdir",
-]
-
-[[package]]
-name = "gix-fs"
-version = "0.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7555c23a005537434bbfcb8939694e18cad42602961d0de617f8477cc2adecdd"
-dependencies = [
- "gix-features",
-]
-
-[[package]]
-name = "gix-glob"
-version = "0.15.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae6232f18b262770e343dcdd461c0011c9b9ae27f0c805e115012aa2b902c1b8"
-dependencies = [
- "bitflags 2.5.0",
- "bstr",
- "gix-features",
- "gix-path",
-]
-
-[[package]]
-name = "gix-hash"
-version = "0.14.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
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- "gix-hashtable",
- "gix-object",
- "gix-revwalk",
- "smallvec",
- "thiserror",
-]
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
- "bstr",
- "gix-features",
- "gix-path",
- "home",
- "thiserror",
+ "libgit2-sys",
+ "log",
  "url",
 ]
 
-[[package]]
-name = "gix-utils"
-version = "0.1.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "35192df7fd0fa112263bad8021e2df7167df4cc2a6e6d15892e1e55621d3d4dc"
-dependencies = [
- "fastrand",
- "unicode-normalization",
-]
-
-[[package]]
-name = "gix-validate"
-version = "0.8.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e39fc6e06044985eac19dd34d474909e517307582e462b2eb4c8fa51b6241545"
-dependencies = [
- "bstr",
- "thiserror",
-]
-
 [[package]]
 name = "glob"
 version = "0.3.1"
@@ -1521,15 +1062,15 @@ dependencies = [
 
 [[package]]
 name = "hyper-rustls"
-version = "0.27.1"
+version = "0.27.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "908bb38696d7a037a01ebcc68a00634112ac2bbf8ca74e30a2c3d2f4f021302b"
+checksum = "5ee4be2c948921a1a5320b629c4193916ed787a7f7f293fd3f7f5a6c9de74155"
 dependencies = [
  "futures-util",
  "http",
  "hyper",
  "hyper-util",
- "rustls 0.23.7",
+ "rustls 0.23.9",
  "rustls-native-certs",
  "rustls-pki-types",
  "tokio",
@@ -1539,9 +1080,9 @@ dependencies = [
 
 [[package]]
 name = "hyper-util"
-version = "0.1.3"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca38ef113da30126bbff9cd1705f9273e15d45498615d138b0c20279ac7a76aa"
+checksum = "7b875924a60b96e5d7b9ae7b066540b1dd1cbd90d1828f54c92e02a283351c56"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -1568,7 +1109,7 @@ dependencies = [
  "iana-time-zone-haiku",
  "js-sys",
  "wasm-bindgen",
- "windows-core",
+ "windows-core 0.52.0",
 ]
 
 [[package]]
@@ -1580,6 +1121,12 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "ident_case"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
+
 [[package]]
 name = "idna"
 version = "0.5.0"
@@ -1647,6 +1194,15 @@ version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
+[[package]]
+name = "jobserver"
+version = "0.1.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2b099aaa34a9751c5bf0878add70444e1ed2dd73f347be99003d4577277de6e"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "jpeg-decoder"
 version = "0.3.1"
@@ -1686,7 +1242,7 @@ dependencies = [
  "http",
  "http-body-util",
  "hyper",
- "hyper-rustls 0.27.1",
+ "hyper-rustls 0.27.2",
  "hyper-util",
  "lavalink_rs_macros",
  "oneshot",
@@ -1709,7 +1265,7 @@ checksum = "426ef2204d4fa6806fa6a00fdd747f7312645fcd30cf9208a5bdfeec6f3b9a41"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
@@ -1727,6 +1283,18 @@ version = "0.2.155"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "97b3888a4aecf77e811145cadf6eef5901f4782c53886191b2f693f24761847c"
 
+[[package]]
+name = "libgit2-sys"
+version = "0.16.2+1.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee4126d8b4ee5c9d9ea891dd875cfdc1e9d0950437179104b183d7d8a74d24e8"
+dependencies = [
+ "cc",
+ "libc",
+ "libz-sys",
+ "pkg-config",
+]
+
 [[package]]
 name = "libm"
 version = "0.2.8"
@@ -1746,11 +1314,12 @@ dependencies = [
 
 [[package]]
 name = "libz-sys"
-version = "1.1.16"
+version = "1.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e143b5e666b2695d28f6bca6497720813f699c9602dd7f5cac91008b8ada7f9"
+checksum = "c15da26e5af7e25c90b37a2d75cdbf940cf4a55316de9d84c679c9b8bfabf82e"
 dependencies = [
  "cc",
+ "libc",
  "pkg-config",
  "vcpkg",
 ]
@@ -1788,9 +1357,9 @@ checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
 [[package]]
 name = "loom"
-version = "0.5.6"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ff50ecb28bb86013e935fb6683ab1f6d3a20016f123c76fd4c27470076ac30f5"
+checksum = "419e0dc8046cb947daa77eb95ae174acfbddb7673b4151f56d1eed8e93fbfaca"
 dependencies = [
  "cfg-if",
  "generator",
@@ -1802,9 +1371,10 @@ dependencies = [
 
 [[package]]
 name = "lyra"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "aho-corasick",
+ "anyhow",
  "bitflags 2.5.0",
  "chrono",
  "color-eyre",
@@ -1820,12 +1390,12 @@ dependencies = [
  "itertools 0.13.0",
  "kmeans_colors",
  "lavalink-rs",
- "lazy_static",
  "linkify",
  "log",
  "lyra_proc",
  "mixbox",
  "palette",
+ "paste",
  "rand",
  "rayon",
  "regex",
@@ -1848,18 +1418,18 @@ dependencies = [
  "twilight-util",
  "twilight-validate",
  "unicode-segmentation",
- "vergen",
+ "vergen-git2",
 ]
 
 [[package]]
 name = "lyra_proc"
-version = "0.6.0"
+version = "0.7.0"
 dependencies = [
  "heck 0.5.0",
  "itertools 0.13.0",
  "quote",
  "serde",
- "syn 2.0.65",
+ "syn 2.0.66",
  "toml",
 ]
 
@@ -1888,15 +1458,6 @@ version = "2.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c8640c5d730cb13ebd907d8d04b52f55ac9a2eec55b440c8892f40d56c76c1d"
 
-[[package]]
-name = "memmap2"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe751422e4a8caa417e13c3ea66452215d7d63e19e604f4980461212f3ae1322"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "minimal-lexical"
 version = "0.2.1"
@@ -2051,9 +1612,9 @@ checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "oneshot"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f6640c6bda7731b1fdbab747981a0f896dd1fedaf9f4a53fa237a04a84431f4"
+checksum = "071d1cf3298ad8e543dca18217d198cb6a3884443d204757b9624b935ef09fa0"
 dependencies = [
  "loom",
 ]
@@ -2105,14 +1666,14 @@ dependencies = [
  "by_address",
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
 name = "parking_lot"
-version = "0.12.2"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e4af0ca4f6caed20e900d564c242b8e5d4903fdacf31d3daf527b66fe6f42fb"
+checksum = "f1bf18183cf54e8d6059647fc3063646a1801cf30896933ec2311622cc4b9a27"
 dependencies = [
  "lock_api",
  "parking_lot_core",
@@ -2169,7 +1730,7 @@ checksum = "2f38a4412a78282e09a2cf38d195ea5420d15ba0602cb375210efbc877243965"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
@@ -2237,19 +1798,46 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
 
 [[package]]
-name = "proc-macro2"
-version = "1.0.83"
+name = "proc-macro-crate"
+version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b33eb56c327dec362a9e55b3ad14f9d2f0904fb5a5b03b513ab5465399e9f43"
+checksum = "6d37c51ca738a55da99dc0c4a34860fd675453b8b36209178c2249bb13651284"
 dependencies = [
- "unicode-ident",
+ "toml_edit 0.21.1",
+]
+
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "version_check",
 ]
 
 [[package]]
-name = "prodash"
-version = "28.0.0"
+name = "proc-macro-error-attr"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "744a264d26b88a6a7e37cbad97953fa233b94d585236310bcbc88474b4092d79"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.85"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22244ce15aa966053a896d1accb3a6e68469b97c7f33f284b99f0d576879fc23"
+dependencies = [
+ "unicode-ident",
+]
 
 [[package]]
 name = "quote"
@@ -2415,9 +2003,9 @@ dependencies = [
 
 [[package]]
 name = "rstest"
-version = "0.19.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d5316d2a1479eeef1ea21e7f9ddc67c191d497abc8fc3ba2467857abbb68330"
+checksum = "9afd55a67069d6e434a95161415f5beeada95a01c7b815508a82dcb0e1593682"
 dependencies = [
  "futures",
  "futures-timer",
@@ -2427,18 +2015,19 @@ dependencies = [
 
 [[package]]
 name = "rstest_macros"
-version = "0.19.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04a9df72cc1f67020b0d63ad9bfe4a323e459ea7eb68e03bd9824db49f9a4c25"
+checksum = "4165dfae59a39dd41d8dec720d3cbfbc71f69744efb480a3920f5d4e0cc6798d"
 dependencies = [
  "cfg-if",
  "glob",
+ "proc-macro-crate",
  "proc-macro2",
  "quote",
  "regex",
  "relative-path",
  "rustc_version",
- "syn 2.0.65",
+ "syn 2.0.66",
  "unicode-ident",
 ]
 
@@ -2497,9 +2086,9 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.23.7"
+version = "0.23.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ebbbdb961df0ad3f2652da8f3fdc4b36122f568f968f45ad3316f26c025c677b"
+checksum = "a218f0f6d05669de4eabfb24f31ce802035c952429d037507b4a4a39f0e60c5b"
 dependencies = [
  "once_cell",
  "ring",
@@ -2580,15 +2169,6 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
 
-[[package]]
-name = "same-file"
-version = "1.0.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
-dependencies = [
- "winapi-util",
-]
-
 [[package]]
 name = "schannel"
 version = "0.1.23"
@@ -2654,9 +2234,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.202"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "226b61a0d411b2ba5ff6d7f73a476ac4f8bb900373459cd00fab8512828ba395"
+checksum = "7253ab4de971e72fb7be983802300c30b5a7f0c2e56fab8abfc6a214307c0094"
 dependencies = [
  "serde_derive",
 ]
@@ -2673,13 +2253,13 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.202"
+version = "1.0.203"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6048858004bcff69094cd972ed40a32500f153bd3be9f716b2eed2e8217c4838"
+checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
@@ -2712,7 +2292,7 @@ checksum = "6c64451ba24fc7a6a2d60fc75dd9c83c90903b19028d4eff35e88fc1e86564e9"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
@@ -2761,16 +2341,6 @@ dependencies = [
  "lazy_static",
 ]
 
-[[package]]
-name = "signal-hook"
-version = "0.3.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8621587d4798caf8eb44879d42e56b9a93ea5dcd315a6487c357130095b62801"
-dependencies = [
- "libc",
- "signal-hook-registry",
-]
-
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.2"
@@ -3062,15 +2632,21 @@ dependencies = [
 
 [[package]]
 name = "stringprep"
-version = "0.1.4"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb41d74e231a107a1b4ee36bd1214b11285b77768d2e3824aedafa988fd36ee6"
+checksum = "7b4df3d392d81bd458a8a621b8bffbd2302a12ffe288a9d931670948749463b1"
 dependencies = [
- "finl_unicode",
  "unicode-bidi",
  "unicode-normalization",
+ "unicode-properties",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+
 [[package]]
 name = "subtle"
 version = "2.5.0"
@@ -3090,9 +2666,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.65"
+version = "2.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2863d96a84c6439701d7a38f9de935ec562c8832cc55d1dde0f513b52fad106"
+checksum = "c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3142,7 +2718,7 @@ checksum = "46c3384250002a6d5af4d114f2845d37b57521033f30d5c3f46c4d70e1197533"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
@@ -3216,9 +2792,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.37.0"
+version = "1.38.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1adbebffeca75fcfd058afa480fb6c0b81e165a0323f9c9d39c9697e37c46787"
+checksum = "ba4f4a02a7a80d6f274636f0aa95c7e383b912d41fe721a31f29e29698585a4a"
 dependencies = [
  "backtrace",
  "bytes",
@@ -3234,13 +2810,13 @@ dependencies = [
 
 [[package]]
 name = "tokio-macros"
-version = "2.2.0"
+version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b8a1e28f2deaa14e508979454cb3a223b10b938b45af148bc0986de36f1923b"
+checksum = "5f5ae998a069d4b5aba8ee9dad856af7d520c3699e6159b185c2acd48155d39a"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
@@ -3260,7 +2836,7 @@ version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c7bc40d0e5a97695bb96e27995cd3a08538541b0a846f65bba7a359f36700d4"
 dependencies = [
- "rustls 0.23.7",
+ "rustls 0.23.9",
  "rustls-pki-types",
  "tokio",
 ]
@@ -3331,14 +2907,14 @@ dependencies = [
 
 [[package]]
 name = "toml"
-version = "0.8.13"
+version = "0.8.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4e43f8cc456c9704c851ae29c67e17ef65d2c30017c17a9765b89c382dc8bba"
+checksum = "6f49eb2ab21d2f26bd6db7bf383edc527a7ebaee412d17af4d40fdccd442f335"
 dependencies = [
  "serde",
  "serde_spanned",
  "toml_datetime",
- "toml_edit",
+ "toml_edit 0.22.14",
 ]
 
 [[package]]
@@ -3352,15 +2928,26 @@ dependencies = [
 
 [[package]]
 name = "toml_edit"
-version = "0.22.13"
+version = "0.21.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c127785850e8c20836d49732ae6abfa47616e60bf9d9f57c43c250361a9db96c"
+checksum = "6a8534fd7f78b5405e860340ad6575217ce99f38d4d5c8f2442cb5ecb50090e1"
+dependencies = [
+ "indexmap",
+ "toml_datetime",
+ "winnow 0.5.40",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.22.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f21c7aaf97f1bd9ca9d4f9e73b0a6c74bd5afef56f2bc931943a6e1c37e04e38"
 dependencies = [
  "indexmap",
  "serde",
  "serde_spanned",
  "toml_datetime",
- "winnow 0.6.8",
+ "winnow 0.6.12",
 ]
 
 [[package]]
@@ -3376,7 +2963,6 @@ dependencies = [
  "tokio",
  "tower-layer",
  "tower-service",
- "tracing",
 ]
 
 [[package]]
@@ -3411,7 +2997,7 @@ checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
@@ -3591,7 +3177,7 @@ checksum = "e6c07ac7c9d2d086291765ceecafcd52ce6dc33ab0ade02e06509eb416d88470"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
@@ -3675,12 +3261,6 @@ version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08f95100a766bf4f8f28f90d77e0a5461bbdb219042e7679bebe79004fed8d75"
 
-[[package]]
-name = "unicode-bom"
-version = "2.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7eec5d1121208364f6793f7d2e222bf75a915c19557537745b195b253dd64217"
-
 [[package]]
 name = "unicode-ident"
 version = "1.0.12"
@@ -3696,6 +3276,12 @@ dependencies = [
  "tinyvec",
 ]
 
+[[package]]
+name = "unicode-properties"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4259d9d4425d9f0661581b804cb85fe66a4c631cadd8f490d1c13a35d5d9291"
+
 [[package]]
 name = "unicode-segmentation"
 version = "1.11.0"
@@ -3757,37 +3343,55 @@ checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
 
 [[package]]
 name = "vergen"
-version = "8.3.1"
+version = "9.0.0-beta.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e27d6bdd219887a9eadd19e1c34f32e47fa332301184935c6d9bca26f3cca525"
+checksum = "107dc53b443fe8cc380798abb75ad6b7038281165109afea1f1b28bb47047ed5"
 dependencies = [
  "anyhow",
  "cargo_metadata",
- "cfg-if",
- "gix",
+ "derive_builder",
+ "getset",
  "regex",
  "rustc_version",
  "rustversion",
  "sysinfo",
  "time",
+ "vergen-lib",
 ]
 
 [[package]]
-name = "version_check"
-version = "0.9.4"
+name = "vergen-git2"
+version = "1.0.0-beta.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+checksum = "8875c5d71074bb67118774e3d795ab6fe77c3ae3161cb54e19104cabc49487f1"
+dependencies = [
+ "anyhow",
+ "derive_builder",
+ "git2",
+ "rustversion",
+ "time",
+ "vergen",
+ "vergen-lib",
+]
 
 [[package]]
-name = "walkdir"
-version = "2.5.0"
+name = "vergen-lib"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
+checksum = "26ebfba72ba904559f25f41ea1512335b5a46459084258cea0857549d9645187"
 dependencies = [
- "same-file",
- "winapi-util",
+ "anyhow",
+ "derive_builder",
+ "getset",
+ "rustversion",
 ]
 
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
 [[package]]
 name = "want"
 version = "0.3.1"
@@ -3830,7 +3434,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
  "wasm-bindgen-shared",
 ]
 
@@ -3852,7 +3456,7 @@ checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -3901,15 +3505,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
-[[package]]
-name = "winapi-util"
-version = "0.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d4cc384e1e73b93bafa6fb4f1df8c41695c8a91cf9c4c64358067d15a7b6c6b"
-dependencies = [
- "windows-sys 0.52.0",
-]
-
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
@@ -3918,20 +3513,21 @@ checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
 name = "windows"
-version = "0.48.0"
+version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
+checksum = "e48a53791691ab099e5e2ad123536d0fff50652600abaf43bbf952894110d0be"
 dependencies = [
- "windows-targets 0.48.5",
+ "windows-core 0.52.0",
+ "windows-targets 0.52.5",
 ]
 
 [[package]]
 name = "windows"
-version = "0.52.0"
+version = "0.54.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e48a53791691ab099e5e2ad123536d0fff50652600abaf43bbf952894110d0be"
+checksum = "9252e5725dbed82865af151df558e754e4a3c2c30818359eb17465f1346a1b49"
 dependencies = [
- "windows-core",
+ "windows-core 0.54.0",
  "windows-targets 0.52.5",
 ]
 
@@ -3944,6 +3540,25 @@ dependencies = [
  "windows-targets 0.52.5",
 ]
 
+[[package]]
+name = "windows-core"
+version = "0.54.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12661b9c89351d684a50a8a643ce5f608e20243b9fb84687800163429f161d65"
+dependencies = [
+ "windows-result",
+ "windows-targets 0.52.5",
+]
+
+[[package]]
+name = "windows-result"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "749f0da9cc72d82e600d8d2e44cadd0b9eedb9038f71a1c58556ac1c5791813b"
+dependencies = [
+ "windows-targets 0.52.5",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.48.0"
@@ -4094,9 +3709,9 @@ dependencies = [
 
 [[package]]
 name = "winnow"
-version = "0.6.8"
+version = "0.6.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3c52e9c97a68071b23e836c9380edae937f17b9c4667bd021973efc689f618d"
+checksum = "41ff33f391015ecab21cd092389215eb265ef9496a9a07b6bee7d3529831deda"
 dependencies = [
  "memchr",
 ]
@@ -4118,14 +3733,14 @@ checksum = "15e934569e47891f7d9411f1a451d947a60e000ab3bd24fbb970f000387d1b3b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.65",
+ "syn 2.0.66",
 ]
 
 [[package]]
 name = "zeroize"
-version = "1.7.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
 
 [[package]]
 name = "zune-core"
diff --git a/Cargo.toml b/Cargo.toml
index 8a5d1b0..b41b28b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,3 +4,6 @@ resolver = "2"
 
 [profile.dev.package.sqlx-macros]
 opt-level = 3
+
+[profile.release]
+lto = true
diff --git a/devenv.lock b/devenv.lock
deleted file mode 100644
index dfe2f8d..0000000
--- a/devenv.lock
+++ /dev/null
@@ -1,161 +0,0 @@
-{
-  "nodes": {
-    "devenv": {
-      "locked": {
-        "dir": "src/modules",
-        "lastModified": 1716992392,
-        "owner": "cachix",
-        "repo": "devenv",
-        "rev": "2a8b6262ae00fc2f8b1b3a6ac35fdc0779085ee1",
-        "treeHash": "24309487ae9d41d1a7d788ac4c75ecb495eacab1",
-        "type": "github"
-      },
-      "original": {
-        "dir": "src/modules",
-        "owner": "cachix",
-        "repo": "devenv",
-        "type": "github"
-      }
-    },
-    "fenix": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "rust-analyzer-src": "rust-analyzer-src"
-      },
-      "locked": {
-        "lastModified": 1716877613,
-        "owner": "nix-community",
-        "repo": "fenix",
-        "rev": "08ea8011dd25421c104a5f44d16a713a27d93fde",
-        "treeHash": "7761561b72987080be37f0ce1a8e4f4e1fda0da2",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-community",
-        "repo": "fenix",
-        "type": "github"
-      }
-    },
-    "flake-compat": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1696426674,
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
-        "treeHash": "2addb7b71a20a25ea74feeaf5c2f6a6b30898ecb",
-        "type": "github"
-      },
-      "original": {
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
-    "gitignore": {
-      "inputs": {
-        "nixpkgs": [
-          "pre-commit-hooks",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1709087332,
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
-        "treeHash": "ca14199cabdfe1a06a7b1654c76ed49100a689f9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "type": "github"
-      }
-    },
-    "nixpkgs": {
-      "locked": {
-        "lastModified": 1716977621,
-        "owner": "cachix",
-        "repo": "devenv-nixpkgs",
-        "rev": "4267e705586473d3e5c8d50299e71503f16a6fb6",
-        "treeHash": "6d9f1f7ca0faf1bc2eeb397c78a49623260d3412",
-        "type": "github"
-      },
-      "original": {
-        "owner": "cachix",
-        "ref": "rolling",
-        "repo": "devenv-nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs-stable": {
-      "locked": {
-        "lastModified": 1716633019,
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "9d29cd266cebf80234c98dd0b87256b6be0af44e",
-        "treeHash": "9c88f2c9f0cdeaddeb5d49c2faaf65b936fc11d3",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-23.11",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "pre-commit-hooks": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "gitignore": "gitignore",
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "nixpkgs-stable": "nixpkgs-stable"
-      },
-      "locked": {
-        "lastModified": 1716213921,
-        "owner": "cachix",
-        "repo": "pre-commit-hooks.nix",
-        "rev": "0e8fcc54b842ad8428c9e705cb5994eaf05c26a0",
-        "treeHash": "17b9f9f9983467bcff247b09761dca9831d3d3be",
-        "type": "github"
-      },
-      "original": {
-        "owner": "cachix",
-        "repo": "pre-commit-hooks.nix",
-        "type": "github"
-      }
-    },
-    "root": {
-      "inputs": {
-        "devenv": "devenv",
-        "fenix": "fenix",
-        "nixpkgs": "nixpkgs",
-        "pre-commit-hooks": "pre-commit-hooks"
-      }
-    },
-    "rust-analyzer-src": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1716828004,
-        "owner": "rust-lang",
-        "repo": "rust-analyzer",
-        "rev": "b32f181f477576bb203879f7539608f3327b6178",
-        "treeHash": "4b8a01567abe7a8fc5561563aa52ac6c029fb31d",
-        "type": "github"
-      },
-      "original": {
-        "owner": "rust-lang",
-        "ref": "nightly",
-        "repo": "rust-analyzer",
-        "type": "github"
-      }
-    }
-  },
-  "root": "root",
-  "version": 7
-}
diff --git a/devenv.nix b/devenv.nix
deleted file mode 100644
index 8b13f44..0000000
--- a/devenv.nix
+++ /dev/null
@@ -1,73 +0,0 @@
-{
-  pkgs,
-  lib,
-  config,
-  inputs,
-  ...
-}: {
-  # https://devenv.sh/basics/
-  # env.GREET = "devenv";
-
-  # https://devenv.sh/packages/
-  packages = with pkgs; [
-    git
-    clang
-    mold
-    codespell
-    act
-    sqlx-cli
-    pgcli
-  ];
-
-  # https://devenv.sh/scripts/
-  # scripts.hello.exec = "";
-
-  enterShell = ''
-    git --version
-  '';
-
-  # https://devenv.sh/tests/
-  enterTest = ''
-    echo "Running tests"
-    git --version | grep "2.42.0"
-  '';
-
-  # https://devenv.sh/services/
-  services.postgres = {
-    enable = true;
-    package = pkgs.postgresql_15;
-    initialDatabases = [{name = "mydb";}];
-    extensions = extensions: [
-      extensions.postgis
-      extensions.timescaledb
-    ];
-    settings.shared_preload_libraries = "timescaledb";
-    initialScript = "CREATE EXTENSION IF NOT EXISTS timescaledb;";
-    listen_addresses = "localhost";
-  };
-
-  # https://devenv.sh/languages/
-  languages.nix.enable = true;
-  languages.java = {
-    enable = true;
-    jdk.package = pkgs.jdk17;
-  };
-  languages.rust = {
-    enable = true;
-    channel = "stable";
-    mold.enable = true;
-  };
-
-  # Enable Codespaces Integration
-  # https://devenv.sh/integrations/codespaces-devcontainer/
-  devcontainer.enable = true;
-
-  # https://devenv.sh/pre-commit-hooks/
-  # pre-commit.hooks.shellcheck.enable = true;
-
-  # https://devenv.sh/processes/
-  processes.lavalink.exec = "scripts/lavalink";
-
-  # See full reference at https://devenv.sh/reference/options/
-  dotenv.enable = true;
-}
diff --git a/devenv.yaml b/devenv.yaml
deleted file mode 100644
index 2bbabf4..0000000
--- a/devenv.yaml
+++ /dev/null
@@ -1,8 +0,0 @@
-inputs:
-  nixpkgs:
-    url: github:cachix/devenv-nixpkgs/rolling
-  fenix:
-    url: github:nix-community/fenix
-    inputs:
-      nixpkgs:
-        follows: nixpkgs
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..5b5ddce
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,482 @@
+{
+  "nodes": {
+    "cachix": {
+      "inputs": {
+        "devenv": "devenv_2",
+        "flake-compat": [
+          "devenv",
+          "flake-compat"
+        ],
+        "nixpkgs": [
+          "devenv",
+          "nixpkgs"
+        ],
+        "pre-commit-hooks": [
+          "devenv",
+          "pre-commit-hooks"
+        ]
+      },
+      "locked": {
+        "lastModified": 1712055811,
+        "narHash": "sha256-7FcfMm5A/f02yyzuavJe06zLa9hcMHsagE28ADcmQvk=",
+        "owner": "cachix",
+        "repo": "cachix",
+        "rev": "02e38da89851ec7fec3356a5c04bc8349cae0e30",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "cachix",
+        "type": "github"
+      }
+    },
+    "devenv": {
+      "inputs": {
+        "cachix": "cachix",
+        "flake-compat": "flake-compat_2",
+        "nix": "nix_2",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "pre-commit-hooks": "pre-commit-hooks"
+      },
+      "locked": {
+        "lastModified": 1717698746,
+        "narHash": "sha256-Bt/q+zyBpI3Uwd6HGTvZSPvRR2DoaHXtvfFULeXP/aI=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "866ecadab5d92cdbb296723f67fa464d01401d9a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "devenv_2": {
+      "inputs": {
+        "flake-compat": [
+          "devenv",
+          "cachix",
+          "flake-compat"
+        ],
+        "nix": "nix",
+        "nixpkgs": "nixpkgs",
+        "poetry2nix": "poetry2nix",
+        "pre-commit-hooks": [
+          "devenv",
+          "cachix",
+          "pre-commit-hooks"
+        ]
+      },
+      "locked": {
+        "lastModified": 1708704632,
+        "narHash": "sha256-w+dOIW60FKMaHI1q5714CSibk99JfYxm0CzTinYWr+Q=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "2ee4450b0f4b95a1b90f2eb5ffea98b90e48c196",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "python-rewrite",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "fenix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": "rust-analyzer-src"
+      },
+      "locked": {
+        "lastModified": 1717741716,
+        "narHash": "sha256-v71DDu2gb02iBIAhUwu5mQZNtYD45QcbEqahqsOCCyU=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "05f2a8ae62c45637b20d162fa2dd450b79e71c27",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "fenix",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1673956053,
+        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-compat_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1689068808,
+        "narHash": "sha256-6ixXo3wt24N/melDWjq70UuHQLxGV8jZvooRanIHXw0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "919d646de7be200f3bf08cb76ae1f09402b6f9b4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "devenv",
+          "pre-commit-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "nix": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "nixpkgs": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "nixpkgs"
+        ],
+        "nixpkgs-regression": "nixpkgs-regression"
+      },
+      "locked": {
+        "lastModified": 1712911606,
+        "narHash": "sha256-BGvBhepCufsjcUkXnEEXhEVjwdJAwPglCC2+bInc794=",
+        "owner": "domenkozar",
+        "repo": "nix",
+        "rev": "b24a9318ea3f3600c1e24b4a00691ee912d4de12",
+        "type": "github"
+      },
+      "original": {
+        "owner": "domenkozar",
+        "ref": "devenv-2.21",
+        "repo": "nix",
+        "type": "github"
+      }
+    },
+    "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "poetry2nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1688870561,
+        "narHash": "sha256-4UYkifnPEw1nAzqqPOTL2MvWtm3sNGw1UTYTalkTcGY=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "165b1650b753316aa7f1787f3005a8d2da0f5301",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
+    "nix_2": {
+      "inputs": {
+        "flake-compat": [
+          "devenv",
+          "flake-compat"
+        ],
+        "nixpkgs": [
+          "devenv",
+          "nixpkgs"
+        ],
+        "nixpkgs-regression": "nixpkgs-regression_2"
+      },
+      "locked": {
+        "lastModified": 1712911606,
+        "narHash": "sha256-BGvBhepCufsjcUkXnEEXhEVjwdJAwPglCC2+bInc794=",
+        "owner": "domenkozar",
+        "repo": "nix",
+        "rev": "b24a9318ea3f3600c1e24b4a00691ee912d4de12",
+        "type": "github"
+      },
+      "original": {
+        "owner": "domenkozar",
+        "ref": "devenv-2.21",
+        "repo": "nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1692808169,
+        "narHash": "sha256-x9Opq06rIiwdwGeK2Ykj69dNc2IvUH1fY55Wm7atwrE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9201b5ff357e781bf014d0330d18555695df7ba8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-regression": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      }
+    },
+    "nixpkgs-regression_2": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      }
+    },
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1710695816,
+        "narHash": "sha256-3Eh7fhEID17pv9ZxrPwCLfqXnYP006RKzSs0JptsN84=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "614b4613980a522ba49f0d194531beddbb7220d3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-23.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1716977621,
+        "narHash": "sha256-Q1UQzYcMJH4RscmpTkjlgqQDX5yi1tZL0O345Ri6vXQ=",
+        "owner": "cachix",
+        "repo": "devenv-nixpkgs",
+        "rev": "4267e705586473d3e5c8d50299e71503f16a6fb6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "rolling",
+        "repo": "devenv-nixpkgs",
+        "type": "github"
+      }
+    },
+    "poetry2nix": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nix-github-actions": "nix-github-actions",
+        "nixpkgs": [
+          "devenv",
+          "cachix",
+          "devenv",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1692876271,
+        "narHash": "sha256-IXfZEkI0Mal5y1jr6IRWMqK8GW2/f28xJenZIPQqkY0=",
+        "owner": "nix-community",
+        "repo": "poetry2nix",
+        "rev": "d5006be9c2c2417dafb2e2e5034d83fabd207ee3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "poetry2nix",
+        "type": "github"
+      }
+    },
+    "pre-commit-hooks": {
+      "inputs": {
+        "flake-compat": [
+          "devenv",
+          "flake-compat"
+        ],
+        "flake-utils": "flake-utils_2",
+        "gitignore": "gitignore",
+        "nixpkgs": [
+          "devenv",
+          "nixpkgs"
+        ],
+        "nixpkgs-stable": "nixpkgs-stable"
+      },
+      "locked": {
+        "lastModified": 1713775815,
+        "narHash": "sha256-Wu9cdYTnGQQwtT20QQMg7jzkANKQjwBD9iccfGKkfls=",
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "rev": "2ac4dcbf55ed43f3be0bae15e181f08a57af24a4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "fenix": "fenix",
+        "nixpkgs": "nixpkgs_2",
+        "systems": "systems_3"
+      }
+    },
+    "rust-analyzer-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1717583671,
+        "narHash": "sha256-+lRAmz92CNUxorqWusgJbL9VE1eKCnQQojglRemzwkw=",
+        "owner": "rust-lang",
+        "repo": "rust-analyzer",
+        "rev": "48bbdd6a74f3176987d5c809894ac33957000d19",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "ref": "nightly",
+        "repo": "rust-analyzer",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_3": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..cc2047d
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,116 @@
+{
+  inputs = {
+    nixpkgs.url = "github:cachix/devenv-nixpkgs/rolling";
+    systems.url = "github:nix-systems/default";
+    devenv = {
+      url = "github:cachix/devenv";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  nixConfig = {
+    extra-trusted-public-keys = "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=";
+    extra-substituters = "https://devenv.cachix.org";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    devenv,
+    systems,
+    ...
+  } @ inputs: let
+    forEachSystem = nixpkgs.lib.genAttrs (import systems);
+  in {
+    packages = forEachSystem (system: {
+      devenv-up = self.devShells.${system}.default.config.procfileScript;
+    });
+
+    devShells =
+      forEachSystem
+      (system: let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in {
+        default = devenv.lib.mkShell {
+          inherit inputs pkgs;
+          modules = [
+            {
+              # https://devenv.sh/basics/
+              # env.GREET = "devenv";
+
+              # https://devenv.sh/packages/
+              packages = with pkgs; [
+                git
+                clang
+                mold
+                codespell
+                act
+                sqlx-cli
+                pgcli
+              ];
+
+              # https://devenv.sh/scripts/
+              # scripts.hello.exec = "";
+
+              enterShell = ''
+              '';
+
+              # https://devenv.sh/tests/
+              enterTest = ''
+              '';
+
+              # https://devenv.sh/services/
+              services.postgres = {
+                enable = true;
+                package = pkgs.postgresql_15;
+                initialDatabases = [{name = "mydb";}];
+                extensions = extensions: [
+                  extensions.postgis
+                  extensions.timescaledb
+                ];
+                settings.shared_preload_libraries = "timescaledb";
+                initialScript = "CREATE EXTENSION IF NOT EXISTS timescaledb;";
+                listen_addresses = "localhost";
+              };
+
+              # https://devenv.sh/languages/
+              languages.nix.enable = true;
+              languages.java = {
+                enable = true;
+                jdk.package = pkgs.jdk17;
+              };
+              languages.rust = {
+                enable = true;
+                channel = "stable";
+                mold.enable = true;
+              };
+
+              # Enable Codespaces Integration
+              # https://devenv.sh/integrations/codespaces-devcontainer/
+              devcontainer.enable = true;
+
+              # https://devenv.sh/pre-commit-hooks/
+              # pre-commit.hooks.shellcheck.enable = true;
+
+              # https://devenv.sh/processes/
+              processes.lavalink.exec = "scripts/lavalink";
+
+              processes.database-setup.exec = ''
+                while ! "./scripts/database"
+                do
+                  :
+                done
+              '';
+
+              # See full reference at https://devenv.sh/reference/options/
+              # dotenv.enable = true;
+            }
+          ];
+        };
+      });
+  };
+}
diff --git a/lavalink/application.yml b/lavalink/application.yml
index aefabbb..45faf2d 100644
--- a/lavalink/application.yml
+++ b/lavalink/application.yml
@@ -43,7 +43,7 @@ lavalink:
       twitch: true
       vimeo: true
       http: true
-      local: true
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diff --git a/lyra/Cargo.toml b/lyra/Cargo.toml
index 5499f05..8fd0ada 100644
--- a/lyra/Cargo.toml
+++ b/lyra/Cargo.toml
@@ -2,7 +2,7 @@
 name = "lyra"
 readme = "../README.md"
 description = "A featureful, self-hostable Discord music bot."
-version = "0.6.0"
+version = "0.7.0"
 edition = "2021"
 license = "GPL-3.0"
 repository = "https://github.com/lyra-music/lyra"
@@ -10,23 +10,26 @@ authors = ["fdnt7"]
 build = "build.rs"
 
 [build-dependencies]
-vergen = { version = "8.3.1", features = [
+anyhow = "*"
+vergen-git2 = { version = "1.0.0-beta.2", features = [
     "build",
     "cargo",
-    "git",
-    "gitoxide",
     "rustc",
     "si",
 ] }
 
 [lints.rust]
-unsafe_code = "forbid"
+# dead_code = "allow"
+unsafe_op_in_unsafe_fn = "forbid"
+# unsafe_code = "forbid"
 
 [lints.clippy]
-enum_glob_use = "deny"
+multiple_unsafe_ops_per_block = "forbid"
+undocumented_unsafe_blocks = "forbid"
+enum_glob_use = "forbid"
+unwrap_used = "forbid"
 pedantic = { level = "deny", priority = -1 }
 nursery = { level = "deny", priority = -1 }
-unwrap_used = "deny"
 
 cast_possible_truncation = "allow"
 cast_possible_wrap = "allow"
@@ -38,6 +41,7 @@ module_name_repetitions = "allow"
 [dependencies]
 lyra_proc = { path = "../lyra_proc" }
 
+paste = "1.0.15"
 const-str = "0.5.7"
 const_panic = { version = "0.2.8", features = ["derive"] }
 heck = "0.5.0"
@@ -46,17 +50,17 @@ unicode-segmentation = "1.11.0"
 dashmap = "5.5.3"
 dotenvy = "0.15.7"
 dotenvy_macro = "0.15.7"
-thiserror = "1.0.60"
+thiserror = "1.0.61"
 color-eyre = "0.6.3"
-rstest = "0.19.0"
+rstest = "0.21.0"
 futures = "0.3.30"
-tokio = { version = "1.37.0", features = [
+tokio = { version = "1.38.0", features = [
     "sync",
     "signal",
     "rt-multi-thread",
     "macros",
 ] }
-serde = "1.0.202"
+serde = "1.0.203"
 serde_json = "1.0.117"
 regex = "1.10.4"
 linkify = "0.10.0"
@@ -67,7 +71,6 @@ tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
 rand = "0.8.5"
 itertools = "0.13.0"
 rayon = "1.10.0"
-lazy_static = "1.4.0"
 chrono = "0.4.38"
 sqlx = { version = "0.7.4", features = ["postgres", "runtime-tokio-rustls"] }
 mixbox = "2.0.0"
diff --git a/lyra/build.rs b/lyra/build.rs
index d35a056..8382530 100644
--- a/lyra/build.rs
+++ b/lyra/build.rs
@@ -1,10 +1,13 @@
-fn main() {
-    vergen::EmitBuilder::builder()
-        .all_build()
-        .all_cargo()
-        .all_git()
-        .all_rustc()
-        .all_sysinfo()
+pub fn main() {
+    emit().unwrap_or_else(|e| panic!("emit error: {e:?}"));
+}
+
+fn emit() -> Result<(), anyhow::Error> {
+    vergen_git2::Emitter::default()
+        .add_instructions(&vergen_git2::BuildBuilder::all_build()?)?
+        .add_instructions(&vergen_git2::CargoBuilder::all_cargo()?)?
+        .add_instructions(&vergen_git2::Git2Builder::all_git()?)?
+        .add_instructions(&vergen_git2::RustcBuilder::all_rustc()?)?
+        .add_instructions(&vergen_git2::SysinfoBuilder::all_sysinfo()?)?
         .emit()
-        .unwrap_or_else(|e| panic!("emit error: {e:?}"));
 }
diff --git a/lyra/src/bot/command.rs b/lyra/src/bot/command.rs
index 2a89525..7d64638 100644
--- a/lyra/src/bot/command.rs
+++ b/lyra/src/bot/command.rs
@@ -3,6 +3,7 @@ pub mod declare;
 pub mod macros;
 pub mod model;
 pub mod poll;
+pub mod require;
 pub mod util;
 
-pub use model::{AutocompleteCtx, MessageCtx, ModalCtx, SlashCtx};
+pub use model::{AutocompleteCtx, MessageCtx, SlashCtx};
diff --git a/lyra/src/bot/command/check.rs b/lyra/src/bot/command/check.rs
index 8d5c445..ec71e1c 100644
--- a/lyra/src/bot/command/check.rs
+++ b/lyra/src/bot/command/check.rs
@@ -1,50 +1,62 @@
 use std::{
     collections::hash_map::DefaultHasher,
     hash::{Hash, Hasher},
-    marker::PhantomData,
+    // marker::PhantomData,
     num::NonZeroUsize,
     sync::Arc,
     time::Duration,
 };
 
-use twilight_cache_inmemory::{model::CachedVoiceState, Reference};
 use twilight_model::{
     channel::{message::MessageFlags, ChannelType},
     guild::Permissions,
-    id::{
-        marker::{ChannelMarker, GuildMarker, UserMarker},
-        Id,
-    },
+    id::{marker::ChannelMarker, Id},
 };
 
 use crate::bot::{
     command::model::{Ctx, CtxKind},
     component::config::access::CalculatorBuilder,
     core::{
-        model::{AuthorPermissionsAware, BotState, CacheAware, OwnedBotStateAware},
+        model::{
+            AuthorIdAware,
+            AuthorPermissionsAware,
+            BotState,
+            // CacheAware,
+            OwnedBotStateAware,
+        },
         traced,
     },
     error::{
-        self,
+        // self,
         command::check::{
-            self, AlternateVoteResponse, SendSupersededWinNoticeError, UserOnlyInError,
+            self, AlternateVoteResponse, PollResolvableError, SendSupersededWinNoticeError,
+            UserOnlyInError,
         },
-        lavalink::NoPlayerError,
-        Cache as CacheError, InVoiceWithSomeoneElse as InVoiceWithSomeoneElseError,
-        InVoiceWithoutUser as InVoiceWithoutUserError, NotInVoice as NotInVoiceError,
-        NotPlaying as NotPlayingError, NotUsersTrack as NotUsersTrackError,
-        Suppressed as SuppressedError, UserNotAccessManager as UserNotAccessManagerError,
-        UserNotAllowed as UserNotAllowedError, UserNotDj as UserNotDjError,
+        CacheResult,
+        InVoiceWithSomeoneElse as InVoiceWithSomeoneElseError,
+        InVoiceWithoutUser as InVoiceWithoutUserError,
+        NotUsersTrack as NotUsersTrackError,
+        UserNotAccessManager as UserNotAccessManagerError,
+        UserNotAllowed as UserNotAllowedError,
+        UserNotDj as UserNotDjError,
         UserNotStageManager as UserNotStageManagerError,
     },
-    gateway::{ExpectedGuildIdAware, GuildIdAware},
+    gateway::GuildIdAware,
     lavalink::{
-        self, CorrectTrackInfo, DelegateMethods, Event, LavalinkAware, PlayerAware, QueueItem,
+        self,
+        CorrectTrackInfo,
+        // DelegateMethods,
+        Event,
+        LavalinkAware,
+        // PlayerAware,
+        QueueItem,
     },
 };
 
 use super::{
-    model::RespondViaMessage, poll, poll::Resolution as PollResolution, poll::Topic as PollTopic,
+    model::{GuildCtx, RespondViaMessage},
+    poll::{self, Resolution as PollResolution, Topic as PollTopic},
+    require::{self, someone_else_in, CachelessInVoice, InVoice},
 };
 
 pub const DJ_PERMISSIONS: Permissions = Permissions::MOVE_MEMBERS.union(Permissions::MUTE_MEMBERS);
@@ -55,8 +67,6 @@ pub const STAGE_MANAGER_PERMISSIONS: Permissions = Permissions::MANAGE_CHANNELS
     .union(Permissions::MUTE_MEMBERS)
     .union(Permissions::MOVE_MEMBERS);
 
-type InVoiceResult<'a> = Reference<'a, (Id<GuildMarker>, Id<UserMarker>), CachedVoiceState>;
-
 pub fn does_user_have_permissions(
     permissions: Permissions,
     ctx: &impl AuthorPermissionsAware,
@@ -97,23 +107,24 @@ pub fn user_is_stage_manager(
 }
 
 pub async fn user_allowed_in(ctx: &Ctx<impl CtxKind>) -> Result<(), check::UserAllowedError> {
-    let Some(guild_id) = ctx.get_guild_id() else {
+    let Some(weak) = require::guild_weak(ctx).ok() else {
         return Ok(());
     };
 
-    if user_is_access_manager(ctx).is_ok() {
+    if user_is_access_manager(&weak).is_ok() {
         return Ok(());
     }
 
     let channel = ctx.channel();
-    let mut access_calculator_builder = CalculatorBuilder::new(guild_id, ctx.db().clone())
+    let mut access_calculator_builder = CalculatorBuilder::new(weak.guild_id(), ctx.db().clone())
         .user(ctx.author_id())
-        .roles(ctx.member().roles.iter());
+        .roles(weak.member().roles.iter());
     match channel.kind {
         ChannelType::PublicThread
         | ChannelType::PrivateThread
         | ChannelType::AnnouncementThread => {
-            let parent_id = channel.parent_id.expect("threads always have a parent id");
+            // SAFETY: `channel.kind` is of type threads, so `parent_id` is present
+            let parent_id = unsafe { channel.parent_id.unwrap_unchecked() };
             access_calculator_builder = access_calculator_builder
                 .thread(channel.id)
                 .text_channel(parent_id);
@@ -143,7 +154,7 @@ pub async fn user_allowed_in(ctx: &Ctx<impl CtxKind>) -> Result<(), check::UserA
 pub async fn user_allowed_to_use(
     channel_id: Id<ChannelMarker>,
     channel_parent_id: Option<Id<ChannelMarker>>,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &GuildCtx<impl CtxKind>,
 ) -> Result<(), check::UserAllowedError> {
     if user_is_access_manager(ctx).is_ok() {
         return Ok(());
@@ -165,265 +176,126 @@ pub async fn user_allowed_to_use(
     Ok(())
 }
 
-pub fn in_voice<T: CtxKind>(ctx: &Ctx<T>) -> Result<InVoice<T>, NotInVoiceError> {
-    let result = ctx.current_voice_state().ok_or(NotInVoiceError)?;
-    Ok(InVoice { result, ctx })
+pub struct InVoiceWithUserResult<'a> {
+    in_voice: InVoice<'a>,
+    kind: InVoiceWithUserResultKind,
 }
 
-pub struct InVoice<'a, T: CtxKind> {
-    result: InVoiceResult<'a>,
-    ctx: &'a Ctx<T>,
+pub enum InVoiceWithUserResultKind {
+    UserIsDj,
+    ToBeDetermined,
 }
 
-pub fn user_in<T: CtxKind>(
+pub fn noone_else_in(
     channel_id: Id<ChannelMarker>,
-    ctx: &Ctx<T>,
-) -> Result<InVoiceWithUserResult<T>, InVoiceWithoutUserError> {
+    ctx: &GuildCtx<impl CtxKind>,
+) -> Result<(), check::UserOnlyInError> {
     if is_user_dj(ctx) {
-        return Ok(InVoiceWithUserResult::Exempted);
-    }
-
-    let result = ctx
-        .cache()
-        .voice_state(ctx.author_id(), ctx.guild_id())
-        .filter(|voice_state| voice_state.channel_id() == channel_id)
-        .ok_or(InVoiceWithoutUserError(channel_id))?;
-
-    Ok(InVoiceWithUserResult::ToBeDetermined(InVoiceWithUser {
-        result,
-        ctx,
-    }))
-}
-
-fn someone_else_in(channel_id: Id<ChannelMarker>, ctx: &Ctx<impl CtxKind>) -> Option<bool> {
-    ctx.cache()
-        .voice_channel_states(channel_id)
-        .map(|mut states| {
-            states.any(|v| {
-                !ctx.cache()
-                    .user(v.user_id())
-                    .expect("user should be in the cache")
-                    .bot
-                    && v.user_id() != ctx.author_id()
-            })
-        })
-}
-
-impl<'a, T: CtxKind> InVoice<'a, T> {
-    pub fn channel_id(&self) -> Id<ChannelMarker> {
-        self.result.channel_id()
-    }
-
-    pub fn with_user(self) -> Result<InVoiceWithUserResult<'a, T>, InVoiceWithoutUserError> {
-        if is_user_dj(self.ctx) {
-            return Ok(InVoiceWithUserResult::Exempted);
-        }
-
-        let ctx = self.ctx;
-        let channel_id = self.channel_id();
-        let result = ctx
-            .cache()
-            .voice_state(ctx.author_id(), ctx.guild_id())
-            .filter(|voice_state| voice_state.channel_id() == channel_id)
-            .ok_or(InVoiceWithoutUserError(channel_id))?;
-
-        Ok(InVoiceWithUserResult::ToBeDetermined(InVoiceWithUser {
-            result,
-            ctx,
-        }))
+        return Ok(());
     }
 
-    pub fn with_someone_else(self) -> Result<(), check::InVoiceWithSomeoneElseError> {
-        let channel_id = self.channel_id();
-
-        if !someone_else_in(channel_id, self.ctx).ok_or(CacheError)? {
-            Err(error::InVoiceWithoutSomeoneElse(channel_id))?;
-        }
-        Ok(())
+    if someone_else_in(channel_id, ctx)? {
+        Err(InVoiceWithSomeoneElseError(channel_id))?;
     }
+    Ok(())
 }
 
-pub struct InVoiceWithUser<'a, T: CtxKind> {
-    result: InVoiceResult<'a>,
-    ctx: &'a Ctx<T>,
+pub struct PollStarterInfo {
+    topic: PollTopic,
+    error: PollResolvableError,
+    in_voice: CachelessInVoice,
 }
 
-pub enum InVoiceWithUserResult<'a, T: CtxKind> {
-    Exempted,
-    ToBeDetermined(InVoiceWithUser<'a, T>),
+pub enum PollStarter {
+    NotRequired,
+    Required(PollStarterInfo),
 }
 
-pub fn noone_else_in(
-    channel_id: Id<ChannelMarker>,
-    ctx: &Ctx<impl CtxKind>,
-) -> Result<(), check::UserOnlyInError> {
-    if is_user_dj(ctx) {
-        return Ok(());
-    }
+impl PollStarter {
+    pub async fn start(
+        self,
+        ctx: &mut GuildCtx<impl RespondViaMessage>,
+    ) -> Result<(), check::HandlePollError> {
+        if let Self::Required(s) = self {
+            return handle_poll(s.error, &s.topic, ctx, &s.in_voice).await;
+        };
 
-    if someone_else_in(channel_id, ctx).ok_or(CacheError)? {
-        Err(InVoiceWithSomeoneElseError(channel_id))?;
+        Ok(())
     }
-    Ok(())
 }
 
-impl<'a, T: CtxKind> InVoiceWithUserResult<'a, T> {
+impl<'a> InVoiceWithUserResult<'a> {
     pub fn only(self) -> Result<(), check::UserOnlyInError> {
-        let InVoiceWithUserResult::ToBeDetermined(result) = self else {
+        if matches!(self.kind, InVoiceWithUserResultKind::UserIsDj) {
             return Ok(());
-        };
-        let channel_id = result.result.channel_id();
+        }
+        let InVoiceWithUserResult { in_voice, .. } = self;
+        let channel_id = in_voice.channel_id();
 
-        if someone_else_in(channel_id, result.ctx).ok_or(CacheError)? {
+        if someone_else_in(channel_id, &in_voice)? {
             Err(InVoiceWithSomeoneElseError(channel_id))?;
         }
         Ok(())
     }
-}
-
-pub fn in_voice_with_user<T: CtxKind>(
-    ctx: &Ctx<T>,
-) -> Result<InVoiceWithUserResult<'_, T>, check::InVoiceWithUserError> {
-    Ok(in_voice(ctx)?.with_user()?)
-}
-
-pub fn in_voice_with_user_only<T: CtxKind>(
-    ctx: &Ctx<T>,
-) -> Result<(), check::InVoiceWithUserOnlyError> {
-    Ok(in_voice(ctx)?.with_user()?.only()?)
-}
 
-pub fn not_suppressed(ctx: &Ctx<impl CtxKind>) -> Result<(), check::NotSuppressedError> {
-    let voice_state = ctx.current_voice_state().ok_or(CacheError)?;
-    let voice_state_channel = ctx
-        .cache()
-        .channel(voice_state.channel_id())
-        .ok_or(CacheError)?;
-
-    if voice_state.mute() {
-        Err(SuppressedError::Muted)?;
-    }
-    let speaker_in_stage =
-        voice_state.suppress() && matches!(voice_state_channel.kind, ChannelType::GuildStageVoice);
-    drop(voice_state);
+    pub fn only_else_poll(self, topic: PollTopic) -> CacheResult<PollStarter> {
+        let in_voice = From::from(&self.in_voice);
+        let Err(error) = self.only() else {
+            return Ok(PollStarter::NotRequired);
+        };
 
-    if speaker_in_stage {
-        Err(SuppressedError::NotSpeaker)?;
+        match error {
+            check::UserOnlyInError::InVoiceWithSomeoneElse(e) => {
+                Ok(PollStarter::Required(PollStarterInfo {
+                    topic,
+                    error: check::PollResolvableError::InVoiceWithSomeoneElse(e),
+                    in_voice,
+                }))
+            }
+            check::UserOnlyInError::Cache(e) => Err(e)?,
+        }
     }
-    Ok(())
 }
 
-pub async fn queue_not_empty(ctx: &Ctx<impl CtxKind>) -> Result<(), error::QueueEmpty> {
-    let guild_id = ctx.guild_id();
-    if ctx
-        .lavalink()
-        .player_data(guild_id)
-        .read()
-        .await
-        .queue()
-        .is_empty()
-    {
-        return Err(error::QueueEmpty);
+pub fn in_voice_with_user(
+    in_voice: InVoice<'_>,
+) -> Result<InVoiceWithUserResult<'_>, InVoiceWithoutUserError> {
+    if is_user_dj(&in_voice) {
+        return Ok(InVoiceWithUserResult {
+            in_voice,
+            kind: InVoiceWithUserResultKind::UserIsDj,
+        });
     }
 
-    Ok(())
-}
+    let channel_id = in_voice.channel_id();
+    in_voice
+        .cache
+        .voice_state(in_voice.author_id, in_voice.guild_id())
+        .filter(|voice_state| voice_state.channel_id() == channel_id)
+        .ok_or(InVoiceWithoutUserError(channel_id))?;
 
-async fn currently_playing(ctx: &Ctx<impl CtxKind>) -> Result<CurrentlyPlaying, NotPlayingError> {
-    let guild_id = ctx.guild_id();
-    let lavalink = ctx.lavalink();
-    let data = lavalink.player_data(guild_id);
-    let data_r = data.read().await;
-    let queue = data_r.queue();
-    let (current, index) = queue.current_and_index().ok_or(NotPlayingError)?;
-
-    let requester = current.requester();
-    let position = NonZeroUsize::new(index + 1).expect("index + 1 is non-zero");
-    let title = current.track().info.corrected_title().into();
-    let channel_id = lavalink.connection(guild_id).channel_id;
-
-    Ok(CurrentlyPlaying {
-        requester,
-        position,
-        title,
-        channel_id,
-        context: CurrentlyPlayingContext::new_via(ctx),
+    Ok(InVoiceWithUserResult {
+        in_voice,
+        kind: InVoiceWithUserResultKind::ToBeDetermined,
     })
 }
 
-struct CurrentlyPlayingContext {
-    author_id: Id<UserMarker>,
-    author_permissions: Permissions,
-}
-
-impl CurrentlyPlayingContext {
-    fn new_via(ctx: &Ctx<impl CtxKind>) -> Self {
-        Self {
-            author_id: ctx.author_id(),
-            author_permissions: ctx.author_permissions(),
-        }
-    }
-}
-
-impl AuthorPermissionsAware for CurrentlyPlayingContext {
-    fn author_permissions(&self) -> Permissions {
-        self.author_permissions
-    }
-}
-
-struct CurrentlyPlaying {
-    requester: Id<UserMarker>,
-    position: NonZeroUsize,
-    title: Arc<str>,
-    channel_id: Id<ChannelMarker>,
-    context: CurrentlyPlayingContext,
-}
-
-impl CurrentlyPlaying {
-    pub fn users_track(&self) -> Result<(), NotUsersTrackError> {
-        let Self {
-            requester,
-            position,
-            title,
-            channel_id,
-            context: ctx,
-        } = self;
-
-        if is_user_dj(ctx) {
-            return Ok(());
-        }
-
-        if *requester == ctx.author_id {
-            return Err(NotUsersTrackError {
-                requester: *requester,
-                position: *position,
-                title: title.clone(),
-                channel_id: *channel_id,
-            });
-        }
-        Ok(())
-    }
-
-    pub fn paused(&self) -> Result<(), error::Paused> {
-        todo!()
-    }
-
-    pub fn stopped(&self) -> Result<(), error::Stopped> {
-        todo!()
+pub fn all_users_track(
+    positions: impl Iterator<Item = NonZeroUsize>,
+    in_voice_with_user: InVoiceWithUserResult,
+    queue: &lavalink::Queue,
+    ctx: &impl AuthorIdAware,
+) -> Result<(), check::UsersTrackError> {
+    if let (Some((position, track)), Err(e)) = (
+        positions
+            .map(|p| (p, &queue[p.get() - 1]))
+            .find(|(_, t)| t.requester() != ctx.author_id()),
+        in_voice_with_user.only(),
+    ) {
+        return Err(impl_users_track(position, track, e));
     }
-}
 
-async fn currently_playing_users_track(
-    ctx: &Ctx<impl CtxKind>,
-) -> Result<(), check::CurrentlyPlayingUsersTrackError> {
-    Ok(currently_playing(ctx).await?.users_track()?)
-}
-
-async fn queue_seekable(ctx: &Ctx<impl CtxKind>) -> Result<(), check::QueueSeekableError> {
-    Ok(currently_playing(ctx)
-        .await
-        .map_err(|_| error::QueueNotSeekable)?
-        .users_track()?)
+    Ok(())
 }
 
 fn impl_users_track(
@@ -447,11 +319,11 @@ fn impl_users_track(
     .into()
 }
 
-pub fn users_track<T: CtxKind>(
+pub fn users_track(
     position: NonZeroUsize,
-    in_voice_with_user: InVoiceWithUserResult<T>,
+    in_voice_with_user: InVoiceWithUserResult,
     queue: &lavalink::Queue,
-    ctx: &Ctx<T>,
+    ctx: &impl AuthorIdAware,
 ) -> Result<(), check::UsersTrackError> {
     if let Err(e) = in_voice_with_user.only() {
         let track = &queue[position.get() - 1];
@@ -463,301 +335,383 @@ pub fn users_track<T: CtxKind>(
     Ok(())
 }
 
-pub fn all_users_track<T: CtxKind>(
-    positions: impl Iterator<Item = NonZeroUsize>,
-    in_voice_with_user: InVoiceWithUserResult<T>,
-    queue: &lavalink::Queue,
-    ctx: &Ctx<T>,
-) -> Result<(), check::UsersTrackError> {
-    if let (Some((position, track)), Err(e)) = (
-        positions
-            .map(|p| (p, &queue[p.get() - 1]))
-            .find(|(_, t)| t.requester() != ctx.author_id()),
-        in_voice_with_user.only(),
-    ) {
-        return Err(impl_users_track(position, track, e));
-    }
-
-    Ok(())
-}
-
-pub fn player_exist(ctx: &impl PlayerAware) -> Result<(), NoPlayerError> {
-    ctx.get_player().ok_or(NoPlayerError)?;
-    Ok(())
-}
-
-#[allow(clippy::struct_excessive_bools)]
-struct Checks {
-    in_voice_with_user: InVoiceWithUserFlag,
-    queue_not_empty: bool,
-    not_suppressed: bool,
-    currently_playing: CurrentlyPlayingFlag,
-    player_stopped: bool,
-    player_paused: bool,
-}
-
-impl Checks {
-    const fn new() -> Self {
-        Self {
-            in_voice_with_user: InVoiceWithUserFlag::Skip,
-            queue_not_empty: false,
-            not_suppressed: false,
-            currently_playing: CurrentlyPlayingFlag::Skip,
-            player_stopped: false,
-            player_paused: false,
-        }
-    }
-}
-
-enum InVoiceWithUserFlag {
-    Skip,
-    CheckOnly(bool),
-}
-
-enum CurrentlyPlayingFlag {
-    Skip,
-    CheckUsersTrack(bool),
-    CheckQueueSeekable,
-}
-
-pub struct Voice;
-pub trait VoiceMarker {}
-impl VoiceMarker for Voice {}
-
-pub struct Queue;
-pub trait QueueMarker {}
-impl QueueMarker for Queue {}
-
-pub struct Playing;
-pub trait PlayingMarker {}
-impl PlayingMarker for Playing {}
-
-pub struct Null;
-impl VoiceMarker for Null {}
-impl QueueMarker for Null {}
-impl PlayingMarker for Null {}
-
-pub struct CheckerBuilder<C: VoiceMarker = Null, Q: QueueMarker = Null, P: PlayingMarker = Null> {
-    checks: Checks,
-    poll_topic: Option<PollTopic>,
-    in_voice_with_user: PhantomData<fn(C) -> C>,
-    queue_not_empty: PhantomData<fn(Q) -> Q>,
-    currently_playing: PhantomData<fn(P) -> P>,
-}
-
-impl CheckerBuilder {
-    pub const fn new() -> Self {
-        Self {
-            checks: Checks::new(),
-            poll_topic: None,
-            in_voice_with_user: PhantomData::<fn(Null) -> Null>,
-            queue_not_empty: PhantomData::<fn(Null) -> Null>,
-            currently_playing: PhantomData::<fn(Null) -> Null>,
-        }
-    }
-
-    pub const fn in_voice_with_user(mut self) -> CheckerBuilder<Voice> {
-        self.checks.in_voice_with_user = InVoiceWithUserFlag::CheckOnly(false);
-        CheckerBuilder {
-            checks: self.checks,
-            poll_topic: self.poll_topic,
-            in_voice_with_user: PhantomData::<fn(Voice) -> Voice>,
-            queue_not_empty: self.queue_not_empty,
-            currently_playing: self.currently_playing,
-        }
-    }
-
-    pub const fn in_voice_with_user_only(mut self) -> CheckerBuilder<Voice> {
-        self.checks.in_voice_with_user = InVoiceWithUserFlag::CheckOnly(true);
-        CheckerBuilder {
-            in_voice_with_user: PhantomData::<fn(Voice) -> Voice>,
-            checks: self.checks,
-            poll_topic: self.poll_topic,
-            queue_not_empty: self.queue_not_empty,
-            currently_playing: self.currently_playing,
-        }
-    }
-
-    pub const fn in_voice_with_user_only_with_poll(
-        mut self,
-        topic: PollTopic,
-    ) -> CheckerBuilder<Voice, Null, Null> {
-        self.checks.in_voice_with_user = InVoiceWithUserFlag::CheckOnly(true);
-        CheckerBuilder {
-            in_voice_with_user: PhantomData::<fn(Voice) -> Voice>,
-            poll_topic: Some(topic),
-            checks: self.checks,
-            queue_not_empty: self.queue_not_empty,
-            currently_playing: self.currently_playing,
-        }
-    }
-}
-
-impl<Q: QueueMarker, P: PlayingMarker> CheckerBuilder<Voice, Q, P> {
-    pub const fn not_suppressed(mut self) -> Self {
-        self.checks.not_suppressed = true;
-        self
-    }
-}
-
-impl CheckerBuilder<Voice, Null, Null> {
-    pub const fn queue_not_empty(mut self) -> CheckerBuilder<Voice, Queue, Null> {
-        self.checks.queue_not_empty = true;
-        CheckerBuilder {
-            queue_not_empty: PhantomData::<fn(Queue) -> Queue>,
-            checks: self.checks,
-            poll_topic: self.poll_topic,
-            in_voice_with_user: self.in_voice_with_user,
-            currently_playing: self.currently_playing,
-        }
-    }
-}
-
-impl CheckerBuilder<Voice, Queue, Null> {
-    pub const fn currently_playing(mut self) -> CheckerBuilder<Voice, Queue, Playing> {
-        self.checks.currently_playing = CurrentlyPlayingFlag::CheckUsersTrack(false);
-        CheckerBuilder {
-            currently_playing: PhantomData::<fn(Playing) -> Playing>,
-            checks: self.checks,
-            poll_topic: self.poll_topic,
-            in_voice_with_user: self.in_voice_with_user,
-            queue_not_empty: self.queue_not_empty,
-        }
-    }
-
-    pub const fn currently_playing_users_track(mut self) -> CheckerBuilder<Voice, Queue, Playing> {
-        self.checks.currently_playing = CurrentlyPlayingFlag::CheckUsersTrack(true);
-        CheckerBuilder {
-            currently_playing: PhantomData::<fn(Playing) -> Playing>,
-            checks: self.checks,
-            poll_topic: self.poll_topic,
-            in_voice_with_user: self.in_voice_with_user,
-            queue_not_empty: self.queue_not_empty,
-        }
-    }
-
-    pub const fn queue_seekable(mut self) -> CheckerBuilder<Voice, Queue, Playing> {
-        self.checks.currently_playing = CurrentlyPlayingFlag::CheckQueueSeekable;
-        CheckerBuilder {
-            currently_playing: PhantomData::<fn(Playing) -> Playing>,
-            poll_topic: self.poll_topic,
-            checks: self.checks,
-            in_voice_with_user: self.in_voice_with_user,
-            queue_not_empty: self.queue_not_empty,
-        }
-    }
-}
-
-impl CheckerBuilder<Voice, Queue, Playing> {
-    pub const fn player_paused(mut self) -> Self {
-        self.checks.player_paused = true;
-        self
-    }
-
-    pub const fn player_stopped(mut self) -> Self {
-        self.checks.player_stopped = true;
-        self
-    }
-}
-
-impl<C: VoiceMarker, Q: QueueMarker, P: PlayingMarker> CheckerBuilder<C, Q, P> {
-    pub const fn build(self) -> Checker {
-        Checker {
-            checks: self.checks,
-            poll_topic: self.poll_topic,
-        }
-    }
-}
-
-#[must_use]
-pub struct Checker {
-    checks: Checks,
-    poll_topic: Option<PollTopic>,
-}
-
-impl Checker {
-    pub async fn run(self, ctx: &mut Ctx<impl RespondViaMessage>) -> Result<(), check::RunError> {
-        let checks = &self.checks;
-        let InVoiceWithUserFlag::CheckOnly(only_in_voice_with_user) = checks.in_voice_with_user
-        else {
-            return Ok(());
-        };
-
-        let in_voice = in_voice(ctx)?;
-        if checks.queue_not_empty {
-            queue_not_empty(ctx).await?;
-        }
-        if checks.not_suppressed {
-            not_suppressed(ctx)?;
-        }
-
-        let playing = match checks.currently_playing {
-            CurrentlyPlayingFlag::CheckUsersTrack(_) => Some(currently_playing(ctx).await?),
-            _ => None,
-        };
-
-        let in_voice_with_user_only = in_voice.with_user()?.only();
-        match in_voice_with_user_only {
-            Err(check::UserOnlyInError::InVoiceWithSomeoneElse(e)) if only_in_voice_with_user => {
-                self.handle_in_voice_with_someone_else(e, playing.as_ref(), ctx)
-                    .await?;
-            }
-            Err(check::UserOnlyInError::Cache(e)) => Err(e)?,
-            _ => {}
-        }
-
-        let Some(playing) = playing else {
-            return Ok(());
-        };
-        if checks.player_paused {
-            playing.paused()?;
-        }
-        if checks.player_stopped {
-            playing.stopped()?;
-        }
-
-        Ok(())
-    }
-
-    async fn handle_in_voice_with_someone_else(
-        &self,
-        error: InVoiceWithSomeoneElseError,
-        playing: Option<&CurrentlyPlaying>,
-        ctx: &mut Ctx<impl RespondViaMessage>,
-    ) -> Result<(), check::HandleInVoiceWithSomeoneElseError> {
-        let e = {
-            match (&self.checks.currently_playing, playing) {
-                (CurrentlyPlayingFlag::CheckQueueSeekable, _) => queue_seekable(ctx)
-                    .await
-                    .map_err(check::PollResolvableError::from)
-                    .err(),
-                (CurrentlyPlayingFlag::CheckUsersTrack(true), Some(playing)) => playing
-                    .users_track()
-                    .map_err(check::PollResolvableError::NotUsersTrack)
-                    .err(),
-                (CurrentlyPlayingFlag::CheckUsersTrack(_), Some(_)) => None,
-                (CurrentlyPlayingFlag::CheckUsersTrack(_), None) => unreachable!(),
-                (CurrentlyPlayingFlag::Skip, _) => {
-                    Some(check::PollResolvableError::InVoiceWithSomeoneElse(error))
-                }
-            }
-        };
-
-        match (e, self.poll_topic.as_ref()) {
-            (None, _) => Ok(()),
-            (Some(e), Some(topic)) => Ok(handle_poll(e, topic, ctx).await?),
-            (Some(e), None) => Err(e)?,
-        }
-    }
-}
+// async fn currently_playing(ctx: &Ctx<impl CtxKind>) -> Result<CurrentlyPlaying, NotPlayingError> {
+//     let guild_id = ctx.guild_id();
+//     let lavalink = ctx.lavalink();
+//     let data = lavalink.player_data(guild_id);
+//     let data_r = data.read().await;
+//     let queue = data_r.queue();
+//     let (current, index) = queue.current_and_index().ok_or(NotPlayingError)?;
+//
+//     let requester = current.requester();
+//     let position = NonZeroUsize::new(index + 1).expect("index + 1 is non-zero");
+//     let title = current.track().info.corrected_title().into();
+//     let channel_id = lavalink.connection(guild_id).channel_id;
+//
+//     Ok(CurrentlyPlaying {
+//         requester,
+//         position,
+//         title,
+//         channel_id,
+//         context: CurrentlyPlayingContext::new_via(ctx),
+//     })
+// }
+//
+// struct CurrentlyPlayingContext {
+//     author_id: Id<UserMarker>,
+//     author_permissions: Permissions,
+// }
+//
+// impl CurrentlyPlayingContext {
+//     fn new_via(ctx: &Ctx<impl CtxKind>) -> Self {
+//         Self {
+//             author_id: ctx.author_id(),
+//             author_permissions: ctx.author_permissions(),
+//         }
+//     }
+// }
+//
+// impl AuthorPermissionsAware for CurrentlyPlayingContext {
+//     fn author_permissions(&self) -> Permissions {
+//         self.author_permissions
+//     }
+// }
+//
+// struct CurrentlyPlaying {
+//     requester: Id<UserMarker>,
+//     position: NonZeroUsize,
+//     title: Arc<str>,
+//     channel_id: Id<ChannelMarker>,
+//     context: CurrentlyPlayingContext,
+// }
+//
+// impl CurrentlyPlaying {
+//     pub fn users_track(&self) -> Result<(), NotUsersTrackError> {
+//         let Self {
+//             requester,
+//             position,
+//             title,
+//             channel_id,
+//             context: ctx,
+//         } = self;
+//
+//         if is_user_dj(ctx) {
+//             return Ok(());
+//         }
+//
+//         if *requester == ctx.author_id {
+//             return Err(NotUsersTrackError {
+//                 requester: *requester,
+//                 position: *position,
+//                 title: title.clone(),
+//                 channel_id: *channel_id,
+//             });
+//         }
+//         Ok(())
+//     }
+//
+//     pub fn paused(&self) -> Result<(), error::Paused> {
+//         todo!()
+//     }
+//
+//     pub fn stopped(&self) -> Result<(), error::Stopped> {
+//         todo!()
+//     }
+// }
+//
+// async fn currently_playing_users_track(
+//     ctx: &Ctx<impl CtxKind>,
+// ) -> Result<(), check::CurrentlyPlayingUsersTrackError> {
+//     Ok(currently_playing(ctx).await?.users_track()?)
+// }
+//
+// async fn queue_seekable(ctx: &Ctx<impl CtxKind>) -> Result<(), check::QueueSeekableError> {
+//     Ok(currently_playing(ctx)
+//         .await
+//         .map_err(|_| error::QueueNotSeekable)?
+//         .users_track()?)
+// }
+//
+//
+//
+// pub fn player_exist(ctx: &impl PlayerAware) -> Result<(), NoPlayerError> {
+//     ctx.get_player().ok_or(NoPlayerError)?;
+//     Ok(())
+// }
+//
+// #[allow(clippy::struct_excessive_bools)]
+// struct Checks {
+//     in_voice_with_user: InVoiceWithUserFlag,
+//     queue_not_empty: bool,
+//     not_suppressed: bool,
+//     currently_playing: CurrentlyPlayingFlag,
+//     player_stopped: bool,
+//     player_paused: bool,
+// }
+//
+// impl Checks {
+//     const fn new() -> Self {
+//         Self {
+//             in_voice_with_user: InVoiceWithUserFlag::Skip,
+//             queue_not_empty: false,
+//             not_suppressed: false,
+//             currently_playing: CurrentlyPlayingFlag::Skip,
+//             player_stopped: false,
+//             player_paused: false,
+//         }
+//     }
+// }
+//
+// enum InVoiceWithUserFlag {
+//     Skip,
+//     CheckOnly(bool),
+// }
+//
+// enum CurrentlyPlayingFlag {
+//     Skip,
+//     CheckUsersTrack(bool),
+//     CheckQueueSeekable,
+// }
+//
+// pub struct Voice;
+// pub trait VoiceMarker {}
+// impl VoiceMarker for Voice {}
+//
+// pub struct Queue;
+// pub trait QueueMarker {}
+// impl QueueMarker for Queue {}
+//
+// pub struct Playing;
+// pub trait PlayingMarker {}
+// impl PlayingMarker for Playing {}
+//
+// pub struct Null;
+// impl VoiceMarker for Null {}
+// impl QueueMarker for Null {}
+// impl PlayingMarker for Null {}
+//
+// pub struct CheckerBuilder<C: VoiceMarker = Null, Q: QueueMarker = Null, P: PlayingMarker = Null> {
+//     checks: Checks,
+//     poll_topic: Option<PollTopic>,
+//     in_voice_with_user: PhantomData<fn(C) -> C>,
+//     queue_not_empty: PhantomData<fn(Q) -> Q>,
+//     currently_playing: PhantomData<fn(P) -> P>,
+// }
+//
+// impl CheckerBuilder {
+//     pub const fn new() -> Self {
+//         Self {
+//             checks: Checks::new(),
+//             poll_topic: None,
+//             in_voice_with_user: PhantomData::<fn(Null) -> Null>,
+//             queue_not_empty: PhantomData::<fn(Null) -> Null>,
+//             currently_playing: PhantomData::<fn(Null) -> Null>,
+//         }
+//     }
+//
+//     pub const fn in_voice_with_user(mut self) -> CheckerBuilder<Voice> {
+//         self.checks.in_voice_with_user = InVoiceWithUserFlag::CheckOnly(false);
+//         CheckerBuilder {
+//             checks: self.checks,
+//             poll_topic: self.poll_topic,
+//             in_voice_with_user: PhantomData::<fn(Voice) -> Voice>,
+//             queue_not_empty: self.queue_not_empty,
+//             currently_playing: self.currently_playing,
+//         }
+//     }
+//
+//     pub const fn in_voice_with_user_only(mut self) -> CheckerBuilder<Voice> {
+//         self.checks.in_voice_with_user = InVoiceWithUserFlag::CheckOnly(true);
+//         CheckerBuilder {
+//             in_voice_with_user: PhantomData::<fn(Voice) -> Voice>,
+//             checks: self.checks,
+//             poll_topic: self.poll_topic,
+//             queue_not_empty: self.queue_not_empty,
+//             currently_playing: self.currently_playing,
+//         }
+//     }
+//
+//     pub const fn in_voice_with_user_only_with_poll(
+//         mut self,
+//         topic: PollTopic,
+//     ) -> CheckerBuilder<Voice, Null, Null> {
+//         self.checks.in_voice_with_user = InVoiceWithUserFlag::CheckOnly(true);
+//         CheckerBuilder {
+//             in_voice_with_user: PhantomData::<fn(Voice) -> Voice>,
+//             poll_topic: Some(topic),
+//             checks: self.checks,
+//             queue_not_empty: self.queue_not_empty,
+//             currently_playing: self.currently_playing,
+//         }
+//     }
+// }
+//
+// impl<Q: QueueMarker, P: PlayingMarker> CheckerBuilder<Voice, Q, P> {
+//     pub const fn not_suppressed(mut self) -> Self {
+//         self.checks.not_suppressed = true;
+//         self
+//     }
+// }
+//
+// impl CheckerBuilder<Voice, Null, Null> {
+//     pub const fn queue_not_empty(mut self) -> CheckerBuilder<Voice, Queue, Null> {
+//         self.checks.queue_not_empty = true;
+//         CheckerBuilder {
+//             queue_not_empty: PhantomData::<fn(Queue) -> Queue>,
+//             checks: self.checks,
+//             poll_topic: self.poll_topic,
+//             in_voice_with_user: self.in_voice_with_user,
+//             currently_playing: self.currently_playing,
+//         }
+//     }
+// }
+//
+// impl CheckerBuilder<Voice, Queue, Null> {
+//     pub const fn currently_playing(mut self) -> CheckerBuilder<Voice, Queue, Playing> {
+//         self.checks.currently_playing = CurrentlyPlayingFlag::CheckUsersTrack(false);
+//         CheckerBuilder {
+//             currently_playing: PhantomData::<fn(Playing) -> Playing>,
+//             checks: self.checks,
+//             poll_topic: self.poll_topic,
+//             in_voice_with_user: self.in_voice_with_user,
+//             queue_not_empty: self.queue_not_empty,
+//         }
+//     }
+//
+//     pub const fn currently_playing_users_track(mut self) -> CheckerBuilder<Voice, Queue, Playing> {
+//         self.checks.currently_playing = CurrentlyPlayingFlag::CheckUsersTrack(true);
+//         CheckerBuilder {
+//             currently_playing: PhantomData::<fn(Playing) -> Playing>,
+//             checks: self.checks,
+//             poll_topic: self.poll_topic,
+//             in_voice_with_user: self.in_voice_with_user,
+//             queue_not_empty: self.queue_not_empty,
+//         }
+//     }
+//
+//     pub const fn queue_seekable(mut self) -> CheckerBuilder<Voice, Queue, Playing> {
+//         self.checks.currently_playing = CurrentlyPlayingFlag::CheckQueueSeekable;
+//         CheckerBuilder {
+//             currently_playing: PhantomData::<fn(Playing) -> Playing>,
+//             poll_topic: self.poll_topic,
+//             checks: self.checks,
+//             in_voice_with_user: self.in_voice_with_user,
+//             queue_not_empty: self.queue_not_empty,
+//         }
+//     }
+// }
+//
+// impl CheckerBuilder<Voice, Queue, Playing> {
+//     pub const fn player_paused(mut self) -> Self {
+//         self.checks.player_paused = true;
+//         self
+//     }
+//
+//     pub const fn player_stopped(mut self) -> Self {
+//         self.checks.player_stopped = true;
+//         self
+//     }
+// }
+//
+// impl<C: VoiceMarker, Q: QueueMarker, P: PlayingMarker> CheckerBuilder<C, Q, P> {
+//     pub const fn build(self) -> Checker {
+//         Checker {
+//             checks: self.checks,
+//             poll_topic: self.poll_topic,
+//         }
+//     }
+// }
+//
+// #[must_use]
+// pub struct Checker {
+//     checks: Checks,
+//     poll_topic: Option<PollTopic>,
+// }
+//
+// impl Checker {
+//     pub async fn run(self, ctx: &mut Ctx<impl RespondViaMessage>) -> Result<(), check::RunError> {
+//         let checks = &self.checks;
+//         let InVoiceWithUserFlag::CheckOnly(only_in_voice_with_user) = checks.in_voice_with_user
+//         else {
+//             return Ok(());
+//         };
+//
+//         let in_voice = in_voice(ctx)?;
+//         if checks.queue_not_empty {
+//             queue_not_empty(ctx).await?;
+//         }
+//         if checks.not_suppressed {
+//             not_suppressed(ctx)?;
+//         }
+//
+//         let playing = match checks.currently_playing {
+//             CurrentlyPlayingFlag::CheckUsersTrack(_) => Some(currently_playing(ctx).await?),
+//             _ => None,
+//         };
+//
+//         let in_voice_with_user_only = in_voice.with_user()?.only();
+//         match in_voice_with_user_only {
+//             Err(check::UserOnlyInError::InVoiceWithSomeoneElse(e)) if only_in_voice_with_user => {
+//                 self.handle_in_voice_with_someone_else(e, playing.as_ref(), ctx)
+//                     .await?;
+//             }
+//             Err(check::UserOnlyInError::Cache(e)) => Err(e)?,
+//             _ => {}
+//         }
+//
+//         let Some(playing) = playing else {
+//             return Ok(());
+//         };
+//         if checks.player_paused {
+//             playing.paused()?;
+//         }
+//         if checks.player_stopped {
+//             playing.stopped()?;
+//         }
+//
+//         Ok(())
+//     }
+//
+//     async fn handle_in_voice_with_someone_else(
+//         &self,
+//         error: InVoiceWithSomeoneElseError,
+//         playing: Option<&CurrentlyPlaying>,
+//         ctx: &mut Ctx<impl RespondViaMessage>,
+//     ) -> Result<(), check::HandleInVoiceWithSomeoneElseError> {
+//         let e = {
+//             match (&self.checks.currently_playing, playing) {
+//                 (CurrentlyPlayingFlag::CheckQueueSeekable, _) => queue_seekable(ctx)
+//                     .await
+//                     .err()
+//                     .map(check::PollResolvableError::from),
+//                 (CurrentlyPlayingFlag::CheckUsersTrack(true), Some(playing)) => playing
+//                     .users_track()
+//                     .err()
+//                     .map(check::PollResolvableError::NotUsersTrack),
+//                 (CurrentlyPlayingFlag::CheckUsersTrack(false), Some(_)) => None,
+//                 (CurrentlyPlayingFlag::CheckUsersTrack(_), None) => unreachable!(),
+//                 (CurrentlyPlayingFlag::Skip, _) => {
+//                     Some(check::PollResolvableError::InVoiceWithSomeoneElse(error))
+//                 }
+//             }
+//         };
+//
+//         match (e, self.poll_topic.as_ref()) {
+//             (None, _) => Ok(()),
+//             (Some(e), Some(topic)) => Ok(handle_poll(e, topic, ctx).await?),
+//             (Some(e), None) => Err(e)?,
+//         }
+//     }
+// }
+//
 
 async fn handle_poll(
     error: check::PollResolvableError,
     topic: &PollTopic,
-    ctx: &mut Ctx<impl RespondViaMessage>,
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
+    in_voice: &CachelessInVoice,
 ) -> Result<(), check::HandlePollError> {
-    let guild_id = ctx.guild_id();
-    let connection = ctx.lavalink().connection(guild_id);
+    let connection = ctx.lavalink().connection_from(in_voice);
     if let Some(poll) = connection.poll() {
         let message = poll.message_owned();
 
@@ -807,8 +761,8 @@ async fn handle_poll(
     }
 
     drop(connection);
-    let resolution = Box::pin(poll::start(topic, ctx)).await;
-    ctx.lavalink().connection_mut(guild_id).reset_poll();
+    let resolution = Box::pin(poll::start(topic, ctx, in_voice)).await;
+    ctx.lavalink().connection_mut_from(in_voice).reset_poll();
     match resolution? {
         PollResolution::UnanimousWin => Ok(()),
         PollResolution::UnanimousLoss => Err(check::PollLossError {
diff --git a/lyra/src/bot/command/declare.rs b/lyra/src/bot/command/declare.rs
index 3b8525d..1d00c67 100644
--- a/lyra/src/bot/command/declare.rs
+++ b/lyra/src/bot/command/declare.rs
@@ -24,15 +24,40 @@ use crate::bot::{
     error::command::declare::{AutocompleteExecuteError, CommandExecuteError},
 };
 
+macro_rules! count {
+    () => (0usize);
+    ( $x:tt $($xs:tt)* ) => (1usize + count!($($xs)*));
+}
+
 macro_rules! declare_slash_commands {
     ($( $raw_cmd: ident ),* $(,)? ) => {
-        lazy_static::lazy_static! {
-            static ref SLASH_COMMANDS_MAP: HashMap<Box<str>, Command> = HashMap::from([
-                $(
-                    (stringify!($raw_cmd).into(), <$raw_cmd>::create_command().into()),
-                )*
-            ]);
-            pub static ref SLASH_COMMANDS: Box<[Command]> = SLASH_COMMANDS_MAP.clone().into_values().collect();
+        ::paste::paste! {
+            struct SlashCommandMap {
+                $([<_ $raw_cmd:snake>]: Command,)*
+            }
+        }
+
+        fn slash_commands_map() -> &'static SlashCommandMap {
+            static SLASH_COMMANDS_MAP: OnceLock<SlashCommandMap> = OnceLock::new();
+            SLASH_COMMANDS_MAP.get_or_init(|| {
+                ::paste::paste! {
+                    SlashCommandMap {
+                        $([<_ $raw_cmd:snake>]: <$raw_cmd>::create_command().into(),)*
+                    }
+                }
+            })
+        }
+
+        type SlashCommands = [Command; count!($($raw_cmd)*)];
+
+        pub fn slash_commands() -> &'static SlashCommands {
+            static SLASH_COMMANDS: OnceLock<SlashCommands> = OnceLock::new();
+            SLASH_COMMANDS.get_or_init(|| {
+                let map = slash_commands_map();
+                ::paste::paste! {
+                    [$(map.[<_ $raw_cmd:snake>].clone(),)*]
+                }
+            })
         }
 
         pub static POPULATED_COMMANDS_MAP: OnceLock<HashMap<Box<str>, Command>> = OnceLock::new();
@@ -40,10 +65,9 @@ macro_rules! declare_slash_commands {
         $(
             impl CommandInfoAware for $raw_cmd {
                 fn name() -> &'static str {
-                    let cmd_name = stringify!($raw_cmd);
-                    &SLASH_COMMANDS_MAP.get(cmd_name)
-                        .unwrap_or_else(|| panic!("command not found: {}", cmd_name))
-                        .name
+                    ::paste::paste! {
+                        &slash_commands_map().[<_ $raw_cmd:snake>].name
+                    }
                 }
             }
         )*
@@ -59,7 +83,7 @@ macro_rules! declare_slash_commands {
                         }
                     )*
                     _ => {
-                        let cmd_data = self.into_partial_command_data();
+                        let cmd_data = self.into_command_data();
                         return Err(CommandExecuteError::UnknownCommand(cmd_data))
                     }
                 }
@@ -70,22 +94,41 @@ macro_rules! declare_slash_commands {
 
 macro_rules! declare_message_commands {
     ($( $raw_cmd: ident ),* $(,)? ) => {
-        lazy_static::lazy_static! {
-            static ref MESSAGE_COMMANDS_MAP: HashMap<Box<str>, Command> = HashMap::from([
-                $(
-                    (stringify!($raw_cmd).into(), <$raw_cmd>::create_command().into()),
-                )*
-            ]);
-            pub static ref MESSAGE_COMMANDS: Box<[Command]> = MESSAGE_COMMANDS_MAP.clone().into_values().collect();
+        ::paste::paste! {
+            struct MessageCommandMap {
+                $([<_ $raw_cmd:snake>]: Command,)*
+            }
+        }
+
+        fn message_commands_map() -> &'static MessageCommandMap {
+            static MESSAGE_COMMANDS_MAP: OnceLock<MessageCommandMap> = OnceLock::new();
+            MESSAGE_COMMANDS_MAP.get_or_init(|| {
+                ::paste::paste! {
+                    MessageCommandMap {
+                        $([<_ $raw_cmd:snake>]: <$raw_cmd>::create_command().into(),)*
+                    }
+                }
+            })
+        }
+
+        type MessageCommands = [Command; count!($($raw_cmd)*)];
+
+        pub fn message_commands() -> &'static MessageCommands {
+            static MESSAGE_COMMANDS: OnceLock<MessageCommands> = OnceLock::new();
+            MESSAGE_COMMANDS.get_or_init(|| {
+                let map = message_commands_map();
+                ::paste::paste! {
+                    [$(map.[<_ $raw_cmd:snake>].clone(),)*]
+                }
+            })
         }
 
         $(
             impl CommandInfoAware for $raw_cmd {
                 fn name() -> &'static str {
-                    let cmd_name = stringify!($raw_cmd);
-                    &MESSAGE_COMMANDS_MAP.get(cmd_name)
-                        .unwrap_or_else(|| panic!("command not found: {}", cmd_name))
-                        .name
+                    ::paste::paste! {
+                        &message_commands_map().[<_ $raw_cmd:snake>].name
+                    }
                 }
             }
         )*
@@ -101,7 +144,7 @@ macro_rules! declare_message_commands {
                         }
                     )*
                     _ => {
-                        let cmd_data = self.into_partial_command_data();
+                        let cmd_data = self.into_command_data();
                         return Err(CommandExecuteError::UnknownCommand(cmd_data))
                     }
                 }
@@ -121,7 +164,7 @@ macro_rules! declare_autocomplete {
                         }
                     )*
                     _ => {
-                        let cmd_data = self.into_partial_command_data();
+                        let cmd_data = self.into_command_data();
                         return Err(AutocompleteExecuteError::UnknownAutocomplete(cmd_data))
                     }
                 }
diff --git a/lyra/src/bot/command/model.rs b/lyra/src/bot/command/model.rs
index 46b72b9..2ed95fc 100644
--- a/lyra/src/bot/command/model.rs
+++ b/lyra/src/bot/command/model.rs
@@ -5,21 +5,68 @@ use std::sync::Arc;
 use twilight_model::{
     application::interaction::{
         application_command::{CommandData, CommandDataOption},
-        InteractionDataResolved,
+        Interaction, InteractionDataResolved,
     },
+    channel::Channel,
+    guild::{PartialMember, Permissions},
     id::{
-        marker::{CommandMarker, GenericMarker},
+        marker::{ChannelMarker, CommandMarker, GenericMarker, UserMarker},
         Id,
     },
+    user::User,
 };
 
 use crate::bot::error::{command::AutocompleteResult, CommandResult};
 
 pub use self::ctx::{
-    AutocompleteCtx, CommandDataAware, Ctx, CtxKind, MessageCtx, ModalCtx, RespondViaMessage,
-    RespondViaModal, SlashCtx, UserCtx,
+    AutocompleteCtx, CommandDataAware, Ctx, CtxKind, GuildCtx, GuildModalCtx, MessageCtx,
+    RespondViaMessage, RespondViaModal, SlashCtx, UserCtx, WeakGuildCtx,
 };
 
+pub trait NonPingInteraction {
+    unsafe fn author_unchecked(&self) -> &User;
+    unsafe fn author_id_unchecked(&self) -> Id<UserMarker> {
+        // SAFETY: interaction type is not `Ping`, so an author exists
+        let author = unsafe { self.author_unchecked() };
+        author.id
+    }
+    unsafe fn channel_unchecked(&self) -> &Channel;
+    unsafe fn channel_id_unchecked(&self) -> Id<ChannelMarker> {
+        // SAFETY: interaction type is not `Ping`, so a channel exists
+        let channel = unsafe { self.channel_unchecked() };
+        channel.id
+    }
+}
+
+impl NonPingInteraction for Interaction {
+    unsafe fn author_unchecked(&self) -> &User {
+        // SAFETY: interaction type is not `Ping`, so an author exists
+        unsafe { self.author().unwrap_unchecked() }
+    }
+
+    unsafe fn channel_unchecked(&self) -> &Channel {
+        // SAFETY: interaction type is not `Ping`, so channel exists
+        unsafe { self.channel.as_ref().unwrap_unchecked() }
+    }
+}
+
+pub trait GuildInteraction {
+    unsafe fn member_unchecked(&self) -> &PartialMember;
+    unsafe fn author_permissions_unchecked(&self) -> Permissions {
+        // SAFETY: interaction invoked in a guild, so member exists
+        let member = unsafe { self.member_unchecked() };
+        // SAFETY: member was sent from an interaction, so permissions is sent
+        unsafe { member.permissions.unwrap_unchecked() }
+    }
+}
+
+impl GuildInteraction for Interaction {
+    unsafe fn member_unchecked(&self) -> &PartialMember {
+        // SAFETY: interaction invoekd in a guild, so member exists
+        unsafe { self.member.as_ref().unwrap_unchecked() }
+    }
+}
+
 #[derive(Debug)]
 pub struct PartialCommandData {
     pub id: Id<CommandMarker>,
diff --git a/lyra/src/bot/command/model/ctx.rs b/lyra/src/bot/command/model/ctx.rs
index 25862f1..bcea3a0 100644
--- a/lyra/src/bot/command/model/ctx.rs
+++ b/lyra/src/bot/command/model/ctx.rs
@@ -6,10 +6,7 @@ mod modal;
 
 use std::{marker::PhantomData, sync::Arc};
 
-use twilight_cache_inmemory::{
-    model::{CachedMember, CachedVoiceState},
-    InMemoryCache, Reference,
-};
+use twilight_cache_inmemory::{model::CachedMember, InMemoryCache, Reference};
 use twilight_gateway::{Latency, MessageSender};
 use twilight_http::Client as HttpClient;
 use twilight_model::{
@@ -24,16 +21,16 @@ use twilight_model::{
 };
 
 use crate::bot::{
+    command::{model::NonPingInteraction, require::CachedVoiceStateRef},
     core::model::{
-        AuthorPermissionsAware, BotState, BotStateAware, CacheAware, HttpAware,
+        AuthorIdAware, AuthorPermissionsAware, BotState, BotStateAware, CacheAware, HttpAware,
         InteractionInterface, OwnedBotState, OwnedBotStateAware,
     },
-    error::{command::RespondError, core::DeserializeBodyFromHttpError},
-    gateway::{ExpectedGuildIdAware, GuildIdAware, SenderAware},
-    lavalink::{
-        ExpectedPlayerAware, ExpectedPlayerDataAware, Lavalink, LavalinkAware, PlayerAware,
-        PlayerDataAware,
+    error::{
+        command::RespondError, core::DeserializeBodyFromHttpError, Cache, CacheResult, NotInGuild,
     },
+    gateway::{GuildIdAware, OptionallyGuildIdAware, SenderAware},
+    lavalink::{Lavalink, LavalinkAware, PlayerAware},
 };
 
 use super::PartialInteractionData;
@@ -44,13 +41,11 @@ pub use self::{
     command_data::CommandDataAware,
     menu::{MessageCtx, UserCtx},
     message::RespondViaMessage,
-    modal::{ModalCtx, RespondViaModal},
+    modal::{GuildModalCtx, RespondViaModal},
 };
 
 type RespondResult<T> = Result<T, RespondError>;
 type UnitRespondResult = RespondResult<()>;
-type CurrentVoiceStateResult<'a> =
-    Option<Reference<'a, (Id<GuildMarker>, Id<UserMarker>), CachedVoiceState>>;
 type CachedBotMember<'a> = Reference<'a, (Id<GuildMarker>, Id<UserMarker>), CachedMember>;
 
 pub trait CtxKind {}
@@ -65,29 +60,59 @@ impl<T: AppCtxKind> CtxKind for AppCtxMarker<T> {}
 
 pub type SlashMarker = AppCtxMarker<SlashAppMarker>;
 pub type SlashCtx = Ctx<SlashMarker>;
+pub type GuildSlashCtx = Ctx<SlashMarker, Guild>;
 
 pub struct ComponentMarker;
 impl CtxKind for ComponentMarker {}
 
 pub type ComponentCtx = Ctx<ComponentMarker>;
 
-pub struct Ctx<T: CtxKind> {
+pub trait CtxLocation {}
+
+pub struct Unknown;
+impl CtxLocation for Unknown {}
+
+pub struct Guild;
+impl CtxLocation for Guild {}
+pub type GuildCtx<T> = Ctx<T, Guild>;
+
+pub struct Ctx<Of: CtxKind, In: CtxLocation = Unknown> {
     inner: Box<InteractionCreate>,
     bot: OwnedBotState,
     latency: Latency,
     sender: MessageSender,
     data: Option<PartialInteractionData>,
     acknowledged: bool,
-    kind: PhantomData<fn(T) -> T>,
+    kind: PhantomData<fn(Of) -> Of>,
+    location: PhantomData<fn(In) -> In>,
+}
+
+impl<T: CtxKind> TryFrom<Ctx<T>> for Ctx<T, Guild> {
+    type Error = NotInGuild;
+
+    fn try_from(value: Ctx<T>) -> Result<Self, Self::Error> {
+        value.get_guild_id().ok_or(NotInGuild)?;
+        Ok(Self {
+            inner: value.inner,
+            bot: value.bot,
+            latency: value.latency,
+            sender: value.sender,
+            data: value.data,
+            acknowledged: value.acknowledged,
+            kind: value.kind,
+            location: PhantomData::<fn(Guild) -> Guild>,
+        })
+    }
 }
 
-impl<T: CtxKind> Ctx<T> {
-    pub fn into_modal_interaction(self, inner: Box<InteractionCreate>) -> ModalCtx {
+impl<T: CtxKind, U: CtxLocation> Ctx<T, U> {
+    pub fn into_modal_interaction(self, inner: Box<InteractionCreate>) -> Ctx<ModalMarker, U> {
         Ctx {
             inner,
             bot: self.bot,
             latency: self.latency,
             sender: self.sender,
+            location: self.location,
             data: None,
             acknowledged: false,
             kind: PhantomData::<fn(ModalMarker) -> ModalMarker>,
@@ -110,38 +135,19 @@ impl<T: CtxKind> Ctx<T> {
         self.bot.db()
     }
 
-    pub fn bot_member(&self) -> CachedBotMember {
-        self.cache()
-            .member(self.guild_id(), self.bot().user_id())
-            .expect("bot's member should be in cache")
-    }
-
     #[inline]
     pub fn channel_id(&self) -> Id<ChannelMarker> {
         self.channel().id
     }
 
     pub fn channel(&self) -> &Channel {
-        self.inner
-            .channel
-            .as_ref()
-            .expect("interaction type is not ping")
+        // SAFETY: Interaction type is not `Ping`, so `channel` is present.
+        unsafe { self.inner.channel_unchecked() }
     }
 
     pub fn author(&self) -> &User {
-        self.inner.author().expect("interaction type is not ping")
-    }
-
-    pub fn member(&self) -> &PartialMember {
-        self.inner
-            .member
-            .as_ref()
-            .expect("interaction invoked in a guild")
-    }
-
-    #[inline]
-    pub fn author_id(&self) -> Id<UserMarker> {
-        self.author().id
+        // SAFETY: Interaction type is not `Ping`, so `author()` is present.
+        unsafe { self.inner.author_unchecked() }
     }
 
     pub fn interaction(&self) -> &InteractionCreate {
@@ -156,25 +162,63 @@ impl<T: CtxKind> Ctx<T> {
         Ok(self.bot.interaction().await?.interfaces(&self.inner))
     }
 
+    pub unsafe fn guild_id_unchecked(&self) -> Id<GuildMarker> {
+        // SAFETY: this interaction was invoked in a guild,
+        //         so `self.inner.guild_id` is present
+        unsafe { self.get_guild_id().unwrap_unchecked() }
+    }
+
+    pub unsafe fn member_unchecked(&self) -> &PartialMember {
+        // SAFETY: this interaction was invoked in a guild,
+        //         so `self.inner.member` is present
+        unsafe { self.inner.member.as_ref().unwrap_unchecked() }
+    }
+
+    pub unsafe fn bot_permissions_unchecked(&self) -> Permissions {
+        // SAFETY: this interaction was invoked in a guild
+        //         so `self.inner.app_permissions` is present
+        unsafe { self.inner.app_permissions.unwrap_unchecked() }
+    }
+
+    pub unsafe fn author_permissions_unchecked(&self) -> Permissions {
+        // SAFETY: this interaction was invoked in a guild,
+        //         so `self.inner.member` is present.
+        let member = unsafe { self.member_unchecked() };
+        // SAFETY: This member object is sent in an interaction,
+        //         so `permissions` is present
+        unsafe { member.permissions.unwrap_unchecked() }
+    }
+}
+
+impl<T: CtxKind> Ctx<T, Guild> {
+    pub fn bot_member(&self) -> CacheResult<CachedBotMember> {
+        self.cache()
+            .member(self.guild_id(), self.bot().user_id())
+            .ok_or(Cache)
+    }
+
+    pub fn member(&self) -> &PartialMember {
+        // SAFETY: `Ctx<_, Guild>` is proven to be of an interaction that was invoked in a guild,
+        //          so `member` is present
+        unsafe { self.member_unchecked() }
+    }
+
     pub fn bot_permissions(&self) -> Permissions {
-        self.inner
-            .app_permissions
-            .expect("interaction invoked in a guild")
+        // SAFETY: `Ctx<_, Guild>` is proven to be of an interaction that was invoked in a guild,
+        //          so `app_permissions` is present
+        unsafe { self.bot_permissions_unchecked() }
     }
 
-    pub fn bot_permissions_for(&self, channel_id: Id<ChannelMarker>) -> Permissions {
+    pub fn bot_permissions_for(&self, channel_id: Id<ChannelMarker>) -> CacheResult<Permissions> {
         if channel_id == self.channel_id() {
-            return self.bot_permissions();
+            return Ok(self.bot_permissions());
         }
 
         let guild_id = self.guild_id();
         let user_id = self.bot().user_id();
-        let everyone_role = self
-            .cache()
-            .role(guild_id.cast())
-            .expect("@everyone role should be in cache");
+        let everyone_role = self.cache().role(guild_id.cast()).ok_or(Cache)?;
         let member_roles = self
-            .bot_member()
+            .bot_member()?
             .roles()
             .iter()
             .filter(|&&r| r != everyone_role.id)
@@ -185,90 +229,127 @@ impl<T: CtxKind> Ctx<T> {
             })
             .collect::<Box<_>>();
 
-        let channel = self
-            .cache()
-            .channel(channel_id)
-            .expect("channel should be in cache");
-        let channel_overwrites = channel
-            .permission_overwrites
-            .as_ref()
-            .expect("channel is in a guild");
-
-        twilight_util::permission_calculator::PermissionCalculator::new(
-            guild_id,
-            user_id,
-            everyone_role.permissions,
-            &member_roles,
+        let channel = self.cache().channel(channel_id).ok_or(Cache)?;
+        let channel_overwrites = channel.permission_overwrites.as_ref().ok_or(Cache)?;
+
+        Ok(
+            twilight_util::permission_calculator::PermissionCalculator::new(
+                guild_id,
+                user_id,
+                everyone_role.permissions,
+                &member_roles,
+            )
+            .in_channel(channel.kind, channel_overwrites),
         )
-        .in_channel(channel.kind, channel_overwrites)
     }
 
-    pub fn current_voice_state(&self) -> CurrentVoiceStateResult {
+    pub fn current_voice_state(&self) -> Option<CachedVoiceStateRef> {
         let user = self.bot().user_id();
-        self.cache().voice_state(user, self.get_guild_id()?)
+        self.cache().voice_state(user, self.guild_id())
     }
 }
 
-impl<T: CtxKind> BotStateAware for Ctx<T> {
+impl<T: CtxKind, U: CtxLocation> BotStateAware for Ctx<T, U> {
     fn bot(&self) -> &BotState {
         &self.bot
     }
 }
 
-impl<T: CtxKind> OwnedBotStateAware for Ctx<T> {
+impl<T: CtxKind, U: CtxLocation> OwnedBotStateAware for Ctx<T, U> {
     fn bot_owned(&self) -> Arc<BotState> {
         self.bot.clone()
     }
 }
 
-impl<T: CtxKind> SenderAware for Ctx<T> {
+impl<T: CtxKind, U: CtxLocation> SenderAware for Ctx<T, U> {
     fn sender(&self) -> &MessageSender {
         &self.sender
     }
 }
 
-impl<T: CtxKind> CacheAware for Ctx<T> {
+impl<T: CtxKind, U: CtxLocation> CacheAware for Ctx<T, U> {
     fn cache(&self) -> &InMemoryCache {
         self.bot.cache()
     }
 }
 
-impl<T: CtxKind> HttpAware for Ctx<T> {
+impl<T: CtxKind, U: CtxLocation> HttpAware for Ctx<T, U> {
     fn http(&self) -> &HttpClient {
         self.bot.http()
     }
 }
 
-impl<T: CtxKind> LavalinkAware for Ctx<T> {
+impl<T: CtxKind, U: CtxLocation> LavalinkAware for Ctx<T, U> {
     fn lavalink(&self) -> &Lavalink {
         self.bot.lavalink()
     }
 }
 
-impl<T: CtxKind> PlayerDataAware for Ctx<T> {}
-impl<T: CtxKind> ExpectedPlayerDataAware for Ctx<T> {}
-impl<T: CtxKind> PlayerAware for Ctx<T> {}
-impl<T: CtxKind> ExpectedPlayerAware for Ctx<T> {}
+impl<T: CtxKind> PlayerAware for GuildCtx<T> {}
 
-impl<T: CtxKind> GuildIdAware for Ctx<T> {
+impl<T: CtxKind, U: CtxLocation> OptionallyGuildIdAware for Ctx<T, U> {
     fn get_guild_id(&self) -> Option<Id<GuildMarker>> {
         self.inner.guild_id
     }
 }
 
-impl<T: CtxKind> ExpectedGuildIdAware for Ctx<T> {
+impl<T: CtxKind, U: CtxLocation> AuthorIdAware for Ctx<T, U> {
+    fn author_id(&self) -> Id<UserMarker> {
+        self.author().id
+    }
+}
+
+impl<T: CtxKind> GuildIdAware for Ctx<T, Guild> {
+    #[inline]
+    fn guild_id(&self) -> Id<GuildMarker> {
+        // SAFETY: `Ctx<_, Guild>` is proven to be of an interaction that was invoked in a guild,
+        //         so `self.guild_id_unchecked()` is safe.
+        unsafe { self.guild_id_unchecked() }
+    }
+}
+
+impl<T: CtxKind> AuthorPermissionsAware for Ctx<T, Guild> {
+    fn author_permissions(&self) -> Permissions {
+        // SAFETY: `Ctx<_, Guild>` is proven to be of an interaction that was invoked in a guild,
+        //          so `self.author_permissions_unchecked()` is safe.
+        unsafe { self.author_permissions_unchecked() }
+    }
+}
+
+pub struct WeakGuildCtx<'a, T: CtxKind>(&'a Ctx<T>);
+
+impl<'a, T: CtxKind> TryFrom<&'a Ctx<T>> for WeakGuildCtx<'a, T> {
+    type Error = NotInGuild;
+
+    fn try_from(value: &'a Ctx<T>) -> Result<Self, Self::Error> {
+        value.get_guild_id().ok_or(NotInGuild)?;
+        Ok(Self(value))
+    }
+}
+
+impl<T: CtxKind> GuildIdAware for WeakGuildCtx<'_, T> {
     fn guild_id(&self) -> Id<GuildMarker> {
-        self.get_guild_id().expect("interaction invoked in a guild")
+        // SAFETY: `self.0.get_guild_id()` is proven to be present from `Self::try_from`,
+        //         proving that this was an interaction invoked in a guild,
+        //         so `self.0.guild_id_unchecked()` is safe.
+        unsafe { self.0.guild_id_unchecked() }
+    }
+}
+
+impl<T: CtxKind> WeakGuildCtx<'_, T> {
+    pub fn member(&self) -> &PartialMember {
+        // SAFETY: `self.0.get_guild_id()` is proven to be present from `Self::try_from`,
+        //          proving that this was an interaction invoked in a guild,
+        //          so `self.0.member_unchecked()` is safe.
+        unsafe { self.0.member_unchecked() }
     }
 }
 
-impl<T: CtxKind> AuthorPermissionsAware for Ctx<T> {
+impl<T: CtxKind> AuthorPermissionsAware for WeakGuildCtx<'_, T> {
     fn author_permissions(&self) -> Permissions {
-        self.inner
-            .member
-            .as_ref()
-            .expect("interaction invoked in a guild")
-            .permissions
-            .expect("member from an interaction")
+        // SAFETY: `self.0.get_guild_id()` is proven to be present from `Self::try_from`,
+        //          proving that this was an interaction invoked in a guild,
+        //          so `self.0.author_permissions_unchecked()` is safe.
+        unsafe { self.0.author_permissions_unchecked() }
     }
 }
diff --git a/lyra/src/bot/command/model/ctx/autocomplete.rs b/lyra/src/bot/command/model/ctx/autocomplete.rs
index 7cff236..33aa2c5 100644
--- a/lyra/src/bot/command/model/ctx/autocomplete.rs
+++ b/lyra/src/bot/command/model/ctx/autocomplete.rs
@@ -1,12 +1,13 @@
 use twilight_model::application::command::CommandOptionChoice;
 
-use super::{Ctx, CtxKind, UnitRespondResult};
+use super::{Ctx, CtxKind, CtxLocation, Guild, UnitRespondResult};
 
 pub struct AutocompleteMarker;
 impl CtxKind for AutocompleteMarker {}
 pub type AutocompleteCtx = Ctx<AutocompleteMarker>;
+pub type GuildAutocompleteCtx = Ctx<AutocompleteMarker, Guild>;
 
-impl AutocompleteCtx {
+impl<U: CtxLocation> Ctx<AutocompleteMarker, U> {
     pub async fn autocomplete(
         &mut self,
         choices: impl IntoIterator<Item = CommandOptionChoice> + Send,
diff --git a/lyra/src/bot/command/model/ctx/command_data.rs b/lyra/src/bot/command/model/ctx/command_data.rs
index 9b69e1e..4ecebdf 100644
--- a/lyra/src/bot/command/model/ctx/command_data.rs
+++ b/lyra/src/bot/command/model/ctx/command_data.rs
@@ -1,4 +1,4 @@
-use std::sync::Arc;
+use std::{hint::unreachable_unchecked, marker::PhantomData, sync::Arc};
 
 use twilight_gateway::{Latency, MessageSender};
 use twilight_model::{
@@ -13,7 +13,9 @@ use crate::bot::{
     core::model::OwnedBotState,
 };
 
-use super::{autocomplete::AutocompleteMarker, AppCtxKind, AppCtxMarker, Ctx, CtxKind};
+use super::{
+    autocomplete::AutocompleteMarker, AppCtxKind, AppCtxMarker, Ctx, CtxKind, CtxLocation,
+};
 
 pub trait CommandDataAware: CtxKind {}
 impl<T: AppCtxKind> CommandDataAware for AppCtxMarker<T> {}
@@ -36,29 +38,32 @@ impl<T: CommandDataAware> Ctx<T> {
             latency,
             sender,
             acknowledged: false,
-            kind: std::marker::PhantomData::<fn(T) -> T>,
+            kind: PhantomData::<fn(T) -> T>,
+            location: PhantomData,
         }
     }
+}
 
-    fn interaction_data(&self) -> &PartialInteractionData {
-        self.data.as_ref().expect("T: CommandDataAware")
-    }
-
-    fn into_interaction_data(self) -> PartialInteractionData {
-        self.data.expect("T: CommandDataAware")
-    }
-
-    pub fn partial_command_data(&self) -> &PartialCommandData {
-        let PartialInteractionData::Command(data) = self.interaction_data() else {
-            unreachable!()
+impl<T: CommandDataAware, U: CtxLocation> Ctx<T, U> {
+    pub fn command_data(&self) -> &PartialCommandData {
+        // SAFETY: `self` is `Ctx<impl CommandDataAware, _>`,
+        //         so `self.data` is present
+        let data = unsafe { self.data.as_ref().unwrap_unchecked() };
+        let PartialInteractionData::Command(data) = data else {
+            // SAFETY:
+            unsafe { unreachable_unchecked() }
         };
         data
     }
 
-    pub fn into_partial_command_data(self) -> PartialCommandData {
-        let data = self.into_interaction_data();
+    pub fn into_command_data(self) -> PartialCommandData {
+        // SAFETY: `self` is `Ctx<impl CommandDataAware, _>`,
+        //         so `self.data` is present
+        let data = unsafe { self.data.unwrap_unchecked() };
         let PartialInteractionData::Command(command_data) = data else {
-            unreachable!()
+            // SAFETY: `self` is `Ctx<impl CommandDataAware, _>`,
+            //         so `data` will always be `PartialInteractionData::Command(_)`
+            unsafe { unreachable_unchecked() }
         };
         command_data
     }
@@ -83,19 +88,14 @@ impl<T: CommandDataAware> Ctx<T> {
         }
 
         recurse_through_names(
-            vec![self.partial_command_data().name.clone()],
-            &self.partial_command_data().options,
+            vec![self.command_data().name.clone()],
+            &self.command_data().options,
         )
         .join(" ")
         .into()
     }
 
     pub fn command_mention_full(&self) -> Box<str> {
-        format!(
-            "</{}:{}>",
-            self.command_name_full(),
-            self.partial_command_data().id
-        )
-        .into()
+        format!("</{}:{}>", self.command_name_full(), self.command_data().id).into()
     }
 }
diff --git a/lyra/src/bot/command/model/ctx/menu.rs b/lyra/src/bot/command/model/ctx/menu.rs
index c1b1e8f..bd9b1f3 100644
--- a/lyra/src/bot/command/model/ctx/menu.rs
+++ b/lyra/src/bot/command/model/ctx/menu.rs
@@ -1,4 +1,5 @@
 use twilight_model::{
+    application::interaction::InteractionDataResolved,
     channel::Message,
     id::{
         marker::{
@@ -9,7 +10,7 @@ use twilight_model::{
     user::User,
 };
 
-use super::{AppCtxKind, AppCtxMarker, Ctx};
+use super::{AppCtxKind, AppCtxMarker, Ctx, CtxLocation};
 
 pub struct UserAppMarker;
 impl AppCtxKind for UserAppMarker {}
@@ -19,50 +20,58 @@ pub type UserCtx = Ctx<UserMarker>;
 pub struct MessageAppMarker;
 impl AppCtxKind for MessageAppMarker {}
 pub type MessageMarker = AppCtxMarker<MessageAppMarker>;
-pub type MessageCtx = Ctx<UserMarker>;
+pub type MessageCtx = Ctx<MessageMarker>;
 
 pub trait TargetIdAware: AppCtxKind {}
 impl TargetIdAware for UserAppMarker {}
 impl TargetIdAware for MessageAppMarker {}
 
-impl<T: TargetIdAware + AppCtxKind> Ctx<AppCtxMarker<T>> {
+impl<T: TargetIdAware + AppCtxKind, U: CtxLocation> Ctx<AppCtxMarker<T>, U> {
     pub fn target_id(&self) -> Id<GenericMarker> {
-        self.partial_command_data()
-            .target_id
-            .expect("T: TargetIdAware")
+        // SAFETY: `self` is `Ctx<impl TargetIdAware, _>`,
+        //         so `self.partial_command_data().target_id` is present
+        unsafe { self.command_data().target_id.unwrap_unchecked() }
+    }
+
+    fn resolved_data(&self) -> &InteractionDataResolved {
+        // SAFETY: `self` is `Ctx<impl TargetIdAware, _>`,
+        //         so `self.partial_command_data().resolved` is present
+        unsafe { self.command_data().resolved.as_ref().unwrap_unchecked() }
     }
 }
 
-impl UserCtx {
+impl<U: CtxLocation> Ctx<UserMarker, U> {
     #[inline]
     pub fn target_user_id(&self) -> Id<TwilightUserMarker> {
         self.target_id().cast()
     }
 
     pub fn target_user(&self) -> &User {
-        self.partial_command_data()
-            .resolved
-            .as_ref()
-            .expect("interaction type is application command")
-            .users
-            .get(&self.target_user_id())
-            .expect("user should be resolved")
+        // SAFETY: `self` is `Ctx<UserMarker, _>`,
+        //         so `self.resolved_data().users.get(&self.target_user_id())` is present
+        unsafe {
+            self.resolved_data()
+                .users
+                .get(&self.target_user_id())
+                .unwrap_unchecked()
+        }
     }
 }
 
-impl MessageCtx {
+impl<U: CtxLocation> Ctx<MessageMarker, U> {
     #[inline]
     pub fn target_message_id(&self) -> Id<TwilightMessageMarker> {
         self.target_id().cast()
     }
 
     pub fn target_message(&self) -> &Message {
-        self.partial_command_data()
-            .resolved
-            .as_ref()
-            .expect("interaction type is application command")
-            .messages
-            .get(&self.target_message_id())
-            .expect("message should be resolved")
+        // SAFETY: `self` is `Ctx<MessageMarker, _>`,
+        //         so `self.resolved_data().messages.get(&self.target_message_id())` is present
+        unsafe {
+            self.resolved_data()
+                .messages
+                .get(&self.target_message_id())
+                .unwrap_unchecked()
+        }
     }
 }
diff --git a/lyra/src/bot/command/model/ctx/message.rs b/lyra/src/bot/command/model/ctx/message.rs
index 484f7e2..ff71792 100644
--- a/lyra/src/bot/command/model/ctx/message.rs
+++ b/lyra/src/bot/command/model/ctx/message.rs
@@ -6,7 +6,10 @@ use twilight_util::builder::InteractionResponseDataBuilder;
 
 use crate::bot::{core::model::MessageResponse, error::command::FollowupError};
 
-use super::{AppCtxKind, AppCtxMarker, ComponentMarker, Ctx, CtxKind, ModalMarker, RespondResult};
+use super::{
+    AppCtxKind, AppCtxMarker, ComponentMarker, Ctx, CtxKind, CtxLocation, ModalMarker,
+    RespondResult,
+};
 
 type MessageRespondResult = RespondResult<MessageResponse>;
 type MessageFollowupResult = Result<MessageResponse, FollowupError>;
@@ -16,7 +19,7 @@ impl<T: AppCtxKind> RespondViaMessage for AppCtxMarker<T> {}
 impl RespondViaMessage for ModalMarker {}
 impl RespondViaMessage for ComponentMarker {}
 
-impl<T: RespondViaMessage> Ctx<T> {
+impl<T: RespondViaMessage, U: CtxLocation> Ctx<T, U> {
     fn base_response_data_builder() -> InteractionResponseDataBuilder {
         InteractionResponseDataBuilder::new().allowed_mentions(AllowedMentions::default())
     }
diff --git a/lyra/src/bot/command/model/ctx/modal.rs b/lyra/src/bot/command/model/ctx/modal.rs
index 924889d..135beed 100644
--- a/lyra/src/bot/command/model/ctx/modal.rs
+++ b/lyra/src/bot/command/model/ctx/modal.rs
@@ -3,26 +3,31 @@ use twilight_model::{
     channel::message::Component,
 };
 
-use super::{AppCtxKind, AppCtxMarker, ComponentMarker, Ctx, CtxKind, UnitRespondResult};
+use super::{
+    AppCtxKind, AppCtxMarker, ComponentMarker, Ctx, CtxKind, CtxLocation, Guild, UnitRespondResult,
+};
 
 pub struct ModalMarker;
 impl CtxKind for ModalMarker {}
 pub type ModalCtx = Ctx<ModalMarker>;
+pub type GuildModalCtx = Ctx<ModalMarker, Guild>;
 
 pub trait RespondViaModal: CtxKind {}
 impl<T: AppCtxKind> RespondViaModal for AppCtxMarker<T> {}
 impl RespondViaModal for ComponentMarker {}
 
-impl Ctx<ModalMarker> {
+impl<U: CtxLocation> Ctx<ModalMarker, U> {
     pub fn submit_data(&self) -> &ModalInteractionData {
         let Some(InteractionData::ModalSubmit(ref data)) = self.inner.data else {
-            unreachable!()
+            // SAFETY: `self` is `Ctx<ModalMarker, _>`,
+            //         so `self.inner.data` will always be `InteractionData::ModalSubmit(_)`
+            unsafe { std::hint::unreachable_unchecked() }
         };
         data
     }
 }
 
-impl<T: RespondViaModal> Ctx<T> {
+impl<T: RespondViaModal, U: CtxLocation> Ctx<T, U> {
     pub async fn modal(
         &mut self,
         custom_id: impl Into<String> + Send,
diff --git a/lyra/src/bot/command/poll.rs b/lyra/src/bot/command/poll.rs
index 2d0b7ac..4d86108 100644
--- a/lyra/src/bot/command/poll.rs
+++ b/lyra/src/bot/command/poll.rs
@@ -29,7 +29,7 @@ use twilight_util::builder::embed::{
 use crate::bot::{
     command::macros::{caut, hid, nope},
     core::{
-        model::{BotStateAware, CacheAware, HttpAware},
+        model::{AuthorIdAware, BotStateAware, CacheAware, HttpAware},
         r#const::{
             colours,
             poll::{BASE, DOWNVOTE, RATIO_BAR_SIZE, UPVOTE},
@@ -40,12 +40,13 @@ use crate::bot::{
         Cache as CacheError,
     },
     ext::util::hex_to_rgb,
-    gateway::ExpectedGuildIdAware,
+    gateway::GuildIdAware,
     lavalink::{Event, EventRecvResult, LavalinkAware},
 };
 
 use super::{
-    model::{Ctx, RespondViaMessage},
+    model::{GuildCtx, GuildInteraction, NonPingInteraction, RespondViaMessage},
+    require::CachelessInVoice,
     util::{AvatarUrlAware, DefaultAvatarUrlAware, GuildAvatarUrlAware, MessageLinkAware},
 };
 
@@ -73,7 +74,7 @@ impl std::fmt::Display for Topic {
                 }
             },
         };
-        write!(f, "{message}")
+        f.write_str(message)
     }
 }
 
@@ -135,7 +136,7 @@ impl Vote {
 impl std::fmt::Display for Vote {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let s = if self.0 { "Agree" } else { "Disagree" };
-        write!(f, "{s}")
+        f.write_str(s)
     }
 }
 
@@ -196,18 +197,17 @@ struct WaitForPollActionsContext<'a> {
 }
 
 fn handle_interactions(inter: Interaction, upvote_button_id: &String) -> PollAction {
-    let user_id = inter.author_id().expect("interaction from a guild");
+    // SAFETY: interaction is not of type `Ping`, so author exists
+    let user_id = unsafe { inter.author_id_unchecked() };
 
     let Some(InteractionData::MessageComponent(ref component)) = inter.data else {
-        unreachable!()
+        // SAFETY: interaction is of type `MessageComponent`,
+        //         so interaction data must also be of type `MessageComponent`
+        unsafe { std::hint::unreachable_unchecked() }
     };
 
-    let voter_permissions = inter
-        .member
-        .as_ref()
-        .expect("interaction from a guild")
-        .permissions
-        .expect("member from an interaction");
+    // SAFETY: interaction invoked in a guild, so author permissions exists
+    let voter_permissions = unsafe { inter.author_permissions_unchecked() };
 
     match (
         super::check::is_user_dj(&Voter::new(voter_permissions)),
@@ -223,7 +223,10 @@ fn handle_interactions(inter: Interaction, upvote_button_id: &String) -> PollAct
     }
 }
 
-fn get_author_info(guild_id: Id<GuildMarker>, ctx: &Ctx<impl RespondViaMessage>) -> (&str, String) {
+fn get_author_info(
+    guild_id: Id<GuildMarker>,
+    ctx: &GuildCtx<impl RespondViaMessage>,
+) -> (&str, String) {
     let author_name = ctx
         .member()
         .nick
@@ -314,13 +317,13 @@ fn generate_latent_embed_colours() -> LatentEmbedColours {
 }
 
 fn get_users_in_voice(
-    ctx: &Ctx<impl RespondViaMessage>,
-    guild_id: Id<GuildMarker>,
+    ctx: &GuildCtx<impl RespondViaMessage>,
+    in_voice: &CachelessInVoice,
 ) -> Result<HashSet<Id<UserMarker>>, CacheError> {
     let users_in_voice = ctx
         .cache()
-        .voice_channel_states(ctx.lavalink().connection(guild_id).channel_id)
-        .expect("bot is in voice")
+        .voice_channel_states(ctx.lavalink().connection_from(in_voice).channel_id)
+        .ok_or(CacheError)?
         .map(|v| ctx.cache().user(v.user_id()).ok_or(CacheError))
         .filter_map_ok(|u| (!u.bot).then_some(u.id))
         .collect::<Result<HashSet<_>, _>>()?;
@@ -435,7 +438,8 @@ async fn update_embed(
 
 pub async fn start(
     topic: &Topic,
-    ctx: &mut Ctx<impl RespondViaMessage>,
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
+    in_voice: &CachelessInVoice,
 ) -> Result<Resolution, StartPollError> {
     let guild_id = ctx.guild_id();
 
@@ -443,7 +447,7 @@ pub async fn start(
     let embed_latent = generate_latent_embed_colours();
     let (upvote_button_id, row) = generate_upvote_button_id_and_row();
 
-    let users_in_voice = get_users_in_voice(ctx, guild_id)?;
+    let users_in_voice = get_users_in_voice(ctx, in_voice)?;
     let votes = HashMap::from([(ctx.author_id(), Vote(true))]);
     let threshold = ((users_in_voice.len() + 1) as f64 / 2.).round() as usize;
 
@@ -465,7 +469,7 @@ pub async fn start(
     let message_id = message.id();
     {
         ctx.lavalink()
-            .connection_mut(guild_id)
+            .connection_mut_from(in_voice)
             .set_poll(Poll::new(topic, message.clone()));
     }
     let components = &mut ctx
@@ -492,7 +496,7 @@ pub async fn start(
         votes,
         threshold,
         embed_ctx,
-        guild_id,
+        in_voice,
     ))
     .await?)
 }
@@ -531,14 +535,14 @@ fn generate_poll_description(votes: &HashMap<Id<UserMarker>, Vote>, threshold: u
 
 async fn wait_for_votes(
     mut poll_ctx: WaitForPollActionsContext<'_>,
-    ctx: &Ctx<impl RespondViaMessage>,
+    ctx: &GuildCtx<impl RespondViaMessage>,
     users_in_voice: HashSet<Id<UserMarker>>,
     mut votes: HashMap<Id<UserMarker>, Vote>,
     threshold: usize,
     embed_ctx: UpdatePollEmbedContext,
-    guild_id: Id<GuildMarker>,
+    in_voice: &CachelessInVoice,
 ) -> Result<Resolution, WaitForVotesError> {
-    let mut rx = ctx.lavalink().connection(guild_id).subscribe();
+    let mut rx = ctx.lavalink().connection_from(in_voice).subscribe();
     loop {
         let poll_stream = wait_for_poll_actions(&mut rx, &mut poll_ctx);
         match tokio::time::timeout(Duration::from_secs(30), poll_stream).await {
@@ -582,7 +586,8 @@ async fn wait_for_votes(
                 PollAction::AlternateCast(user_id) => {
                     if !users_in_voice.contains(&user_id) {
                         ctx.lavalink()
-                            .dispatch(guild_id, Event::AlternateVoteCastDenied);
+                            .connection_from(in_voice)
+                            .dispatch(Event::AlternateVoteCastDenied);
                         continue;
                     }
                     match votes.entry(user_id) {
@@ -591,7 +596,8 @@ async fn wait_for_votes(
                         }
                         Entry::Occupied(e) => {
                             ctx.lavalink()
-                                .dispatch(guild_id, Event::AlternateVoteCastedAlready(*e.get()));
+                                .connection_from(in_voice)
+                                .dispatch(Event::AlternateVoteCastedAlready(*e.get()));
                             continue;
                         }
                     }
diff --git a/lyra/src/bot/command/require.rs b/lyra/src/bot/command/require.rs
new file mode 100644
index 0000000..cbcd534
--- /dev/null
+++ b/lyra/src/bot/command/require.rs
@@ -0,0 +1,203 @@
+use lavalink_rs::{
+    error::LavalinkResult, model::player::Player as PlayerInfo, player_context::PlayerContext,
+};
+use twilight_cache_inmemory::{model::CachedVoiceState, InMemoryCache, Reference};
+use twilight_model::{
+    channel::ChannelType,
+    guild::Permissions,
+    id::{
+        marker::{ChannelMarker, GuildMarker, UserMarker},
+        Id,
+    },
+};
+
+use crate::bot::{
+    core::model::{AuthorIdAware, AuthorPermissionsAware, CacheAware},
+    error::{
+        command::check, lavalink::NoPlayerError, Cache, CacheResult, InVoiceWithoutSomeoneElse,
+        NotInGuild, NotInVoice, QueueEmpty, Suppressed,
+    },
+    gateway::GuildIdAware,
+    lavalink::{PlayerAware, PlayerDataRwLockArc, UnwrappedPlayerData},
+};
+
+use super::model::{Ctx, CtxKind, GuildCtx, WeakGuildCtx};
+
+pub fn guild<T: CtxKind>(ctx: Ctx<T>) -> Result<GuildCtx<T>, NotInGuild> {
+    GuildCtx::try_from(ctx)
+}
+
+pub fn guild_weak<T: CtxKind>(ctx: &Ctx<T>) -> Result<WeakGuildCtx<T>, NotInGuild> {
+    WeakGuildCtx::try_from(ctx)
+}
+
+pub struct Player {
+    pub context: PlayerContext,
+}
+
+impl Player {
+    pub async fn info(&self) -> LavalinkResult<PlayerInfo> {
+        self.context.get_player().await
+    }
+
+    pub fn data(&self) -> PlayerDataRwLockArc {
+        self.context.data_unwrapped()
+    }
+
+    pub async fn and_queue_not_empty(self) -> Result<Self, QueueEmpty> {
+        if self.data().read().await.queue().is_empty() {
+            return Err(QueueEmpty);
+        }
+
+        Ok(self)
+    }
+}
+
+pub fn player(ctx: &impl PlayerAware) -> Result<Player, NoPlayerError> {
+    let context = ctx.get_player().ok_or(NoPlayerError)?;
+    Ok(Player { context })
+}
+
+pub type CachedVoiceStateRef<'a> =
+    Reference<'a, (Id<GuildMarker>, Id<UserMarker>), CachedVoiceState>;
+
+#[derive(Clone)]
+pub struct InVoiceCachedVoiceState {
+    guild_id: Id<GuildMarker>,
+    channel_id: Id<ChannelMarker>,
+    mute: bool,
+    suppress: bool,
+}
+
+impl From<CachedVoiceStateRef<'_>> for InVoiceCachedVoiceState {
+    fn from(value: CachedVoiceStateRef<'_>) -> Self {
+        Self {
+            guild_id: value.guild_id(),
+            channel_id: value.channel_id(),
+            mute: value.mute(),
+            suppress: value.suppress(),
+        }
+    }
+}
+
+#[must_use]
+pub struct InVoice<'a> {
+    state: InVoiceCachedVoiceState,
+    author_permissions: Permissions,
+    pub author_id: Id<UserMarker>,
+    pub cache: &'a InMemoryCache,
+}
+
+#[must_use]
+pub struct CachelessInVoice {
+    state: InVoiceCachedVoiceState,
+    author_permissions: Permissions,
+    pub author_id: Id<UserMarker>,
+}
+
+impl From<&InVoice<'_>> for CachelessInVoice {
+    fn from(value: &InVoice<'_>) -> Self {
+        Self {
+            state: value.state.clone(),
+            author_permissions: value.author_permissions,
+            author_id: value.author_id,
+        }
+    }
+}
+
+impl GuildIdAware for CachelessInVoice {
+    fn guild_id(&self) -> Id<GuildMarker> {
+        self.state.guild_id
+    }
+}
+
+pub fn in_voice<T: CtxKind>(ctx: &GuildCtx<T>) -> Result<InVoice, NotInVoice> {
+    let state = ctx.current_voice_state().ok_or(NotInVoice)?;
+    // SAFETY: it has been proven that there is a voice connection currently
+    Ok(unsafe { InVoice::new(state.into(), ctx) })
+}
+
+impl<'a> InVoice<'a> {
+    pub unsafe fn new(
+        state: InVoiceCachedVoiceState,
+        ctx: &'a (impl AuthorPermissionsAware + AuthorIdAware + CacheAware),
+    ) -> Self {
+        Self {
+            state,
+            author_permissions: ctx.author_permissions(),
+            author_id: ctx.author_id(),
+            cache: ctx.cache(),
+        }
+    }
+
+    pub const fn channel_id(&self) -> Id<ChannelMarker> {
+        self.state.channel_id
+    }
+
+    pub fn and_unsuppressed(self) -> Result<Self, check::NotSuppressedError> {
+        let state = &self.state;
+        let voice_state_channel = self.cache.channel(state.channel_id).ok_or(Cache)?;
+
+        if state.mute {
+            Err(Suppressed::Muted)?;
+        }
+        let speaker_in_stage =
+            state.suppress && matches!(voice_state_channel.kind, ChannelType::GuildStageVoice);
+
+        if speaker_in_stage {
+            Err(Suppressed::NotSpeaker)?;
+        }
+        Ok(self)
+    }
+
+    pub fn and_with_someone_else(self) -> Result<Self, check::InVoiceWithSomeoneElseError> {
+        let channel_id = self.channel_id();
+
+        if !someone_else_in(channel_id, &self)? {
+            Err(InVoiceWithoutSomeoneElse(channel_id))?;
+        }
+        Ok(self)
+    }
+}
+
+impl CacheAware for InVoice<'_> {
+    fn cache(&self) -> &InMemoryCache {
+        self.cache
+    }
+}
+
+impl AuthorIdAware for InVoice<'_> {
+    fn author_id(&self) -> Id<UserMarker> {
+        self.author_id
+    }
+}
+
+impl AuthorPermissionsAware for InVoice<'_> {
+    fn author_permissions(&self) -> Permissions {
+        self.author_permissions
+    }
+}
+
+impl GuildIdAware for InVoice<'_> {
+    fn guild_id(&self) -> Id<GuildMarker> {
+        self.state.guild_id
+    }
+}
+
+pub fn someone_else_in(
+    channel_id: Id<ChannelMarker>,
+    ctx: &(impl CacheAware + AuthorIdAware),
+) -> CacheResult<bool> {
+    let cache = ctx.cache();
+    cache
+        .voice_channel_states(channel_id)
+        .and_then(|states| {
+            for state in states {
+                if !cache.user(state.user_id())?.bot && state.user_id() != ctx.author_id() {
+                    return Some(true);
+                }
+            }
+            Some(false)
+        })
+        .ok_or(Cache)
+}
diff --git a/lyra/src/bot/command/util.rs b/lyra/src/bot/command/util.rs
index b0969ca..a9c88b4 100644
--- a/lyra/src/bot/command/util.rs
+++ b/lyra/src/bot/command/util.rs
@@ -1,5 +1,5 @@
 use chrono::Utc;
-use lavalink_rs::error::LavalinkResult;
+use lavalink_rs::{error::LavalinkResult, player_context::PlayerContext};
 use rand::{distributions::Alphanumeric, Rng};
 use twilight_gateway::Event;
 use twilight_model::{
@@ -20,13 +20,15 @@ use twilight_model::{
 use super::{
     check,
     macros::note_fol,
-    model::{CommandDataAware, Ctx, CtxKind, RespondViaMessage, RespondViaModal},
-    ModalCtx,
+    model::{
+        CommandDataAware, CtxKind, GuildCtx, GuildModalCtx, RespondViaMessage, RespondViaModal,
+    },
+    require::{self, InVoice},
 };
 use crate::bot::{
     component::connection::auto_join,
     core::{
-        model::{BotStateAware, CacheAware, OwnedBotStateAware},
+        model::{AuthorIdAware, BotStateAware, CacheAware, OwnedBotStateAware},
         r#const::{
             self,
             discord::{BASE_URL, CDN_URL},
@@ -42,7 +44,7 @@ use crate::bot::{
         },
         Suppressed as SuppressedError,
     },
-    gateway::ExpectedGuildIdAware,
+    gateway::GuildIdAware,
     lavalink::{DelegateMethods, LavalinkAware},
 };
 
@@ -53,7 +55,7 @@ pub trait MessageLinkAware {
     fn link(&self) -> String {
         let guild_id_str = self
             .guild_id()
-            .map_or_else(|| String::from("@me"), |g| g.to_string());
+            .map_or_else(|| String::from("@me"), |i| i.to_string());
         format!(
             "{}/channels/{}/{}/{}",
             BASE_URL,
@@ -164,7 +166,10 @@ pub trait GuildAvatarUrlAware {
 
 impl GuildAvatarUrlAware for PartialMember {
     fn id(&self) -> Id<UserMarker> {
-        self.user.as_ref().expect("member is not partial").id
+        self.user
+            .as_ref()
+            .unwrap_or_else(|| panic!("user field is missing"))
+            .id
     }
     fn avatar(&self) -> Option<ImageHash> {
         self.avatar
@@ -198,28 +203,34 @@ impl DefaultAvatarUrlAware for User {
 }
 
 pub async fn auto_join_or_check_in_voice_with_user_and_check_not_suppressed(
-    ctx: &mut Ctx<impl RespondViaMessage>,
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
 ) -> Result<(), AutoJoinOrCheckInVoiceWithUserError> {
-    if let Some(voice_state) = ctx.current_voice_state() {
-        check::user_in(voice_state.channel_id(), ctx)?;
-        check::not_suppressed(ctx)?;
+    if let Ok(in_voice) = require::in_voice(ctx) {
+        let in_voice = in_voice.and_unsuppressed()?;
+        check::in_voice_with_user(in_voice)?;
         return Ok(());
     }
 
-    let Err(e) = auto_join(ctx).await else {
-        let Err(NotSuppressedError::Suppressed(suppressed)) = check::not_suppressed(ctx) else {
-            return Ok(());
-        };
-        handle_suppressed_auto_join(suppressed, ctx).await?;
-        return Ok(());
-    };
-
-    Err(e.unflatten_into_auto_join_attempt())?
+    match auto_join(ctx).await {
+        Err(e) => Err(e.unflatten_into_auto_join_attempt())?,
+        Ok(state) => {
+            let Err(NotSuppressedError::Suppressed(suppressed)) = {
+                // SAFETY: as `auto_join` was called and ran successfully,
+                //         there must now be an active voice connection.
+                unsafe { InVoice::new(state, ctx) }
+            }
+            .and_unsuppressed() else {
+                return Ok(());
+            };
+            handle_suppressed_auto_join(suppressed, ctx).await?;
+            Ok(())
+        }
+    }
 }
 
 async fn handle_suppressed_auto_join(
     error: SuppressedError,
-    ctx: &Ctx<impl RespondViaMessage>,
+    ctx: &GuildCtx<impl RespondViaMessage>,
 ) -> Result<(), HandleSuppressedAutoJoinError> {
     let bot_user_id = ctx.bot().user_id();
     match error {
@@ -252,7 +263,7 @@ async fn handle_suppressed_auto_join(
             );
             let requested_to_speak_message = requested_to_speak.model().await?;
             let wait_for_speaker = tokio::time::timeout(
-                *r#const::misc::WAIT_FOR_BOT_EVENTS_TIMEOUT,
+                *r#const::misc::wait_for_bot_events_timeout(),
                 wait_for_speaker,
             );
 
@@ -267,15 +278,15 @@ async fn handle_suppressed_auto_join(
 }
 
 pub async fn prompt_for_confirmation(
-    mut ctx: Ctx<impl CommandDataAware + RespondViaModal>,
-) -> Result<ModalCtx, PromptForConfirmationError> {
+    mut ctx: GuildCtx<impl CommandDataAware + RespondViaModal>,
+) -> Result<GuildModalCtx, PromptForConfirmationError> {
     let text_input = TextInput {
         custom_id: String::new(),
-        label: "This is a destructive command. Are you sure?".into(),
+        label: String::from("This is a destructive command. Are you sure?"),
         max_length: None,
         min_length: None,
-        required: true.into(),
-        placeholder: Some(r#"Type "YES" (All Caps) to confirm..."#.into()),
+        required: Some(true),
+        placeholder: Some(String::from(r#"Type "YES" (All Caps) to confirm..."#)),
         style: TextInputStyle::Short,
         value: None,
     };
@@ -309,7 +320,7 @@ pub async fn prompt_for_confirmation(
         });
 
     let wait_for_modal_submit = tokio::time::timeout(
-        *r#const::misc::DESTRUCTIVE_COMMAND_CONFIRMATION_TIMEOUT,
+        *r#const::misc::destructive_command_confirmation_timeout(),
         wait_for_modal_submit,
     )
     .await;
@@ -326,7 +337,9 @@ pub async fn prompt_for_confirmation(
             }
             ctx
         }
-        Ok(Ok(_)) => unreachable!(),
+        // SAFETY: the future has been filtered to only match modal submit interaction
+        //         so this branch is unreachable
+        Ok(Ok(_)) => unsafe { std::hint::unreachable_unchecked() },
         Ok(Err(e)) => Err(e)?,
         Err(_) => Err(ConfirmationError::TimedOut)?,
     };
@@ -334,12 +347,14 @@ pub async fn prompt_for_confirmation(
     Ok(modal_ctx)
 }
 
-pub async fn auto_new_player_data(ctx: &Ctx<impl CtxKind>) -> LavalinkResult<()> {
+pub async fn auto_new_player(ctx: &GuildCtx<impl CtxKind>) -> LavalinkResult<PlayerContext> {
     let guild_id = ctx.guild_id();
     let lavalink = ctx.lavalink();
 
-    if lavalink.get_player_data(guild_id).is_none() {
-        lavalink.new_player_data(guild_id).await?;
-    }
-    Ok(())
+    let player = match lavalink.get_player_context(guild_id) {
+        Some(player) => player,
+        None => lavalink.new_player(guild_id).await?,
+    };
+
+    Ok(player)
 }
diff --git a/lyra/src/bot/component/config/access.rs b/lyra/src/bot/component/config/access.rs
index f15589c..544223a 100644
--- a/lyra/src/bot/component/config/access.rs
+++ b/lyra/src/bot/component/config/access.rs
@@ -4,6 +4,7 @@ mod mode;
 mod view;
 
 use bitflags::bitflags;
+use const_str::concat as const_str_concat;
 use itertools::Itertools;
 use sqlx::{Pool, Postgres};
 use tokio::task::JoinSet;
@@ -63,25 +64,24 @@ impl CalculatorBuilder {
         }
     }
 
-    fn query(mut self, column: &'static str, id: i64) -> Self {
+    fn query(mut self, category: &AccessCategoryFlag, id: i64) -> Self {
+        let column = category.ident();
         let db = self.db.clone();
         self.set.spawn(async move {
             let in_access_controls = sqlx::query_as::<_, (Option<bool>,)>(&format!(
-                "--sql
-                SELECT EXISTS (SELECT 1 FROM {column} WHERE guild = $1 AND id = $2) 
-                "
+                "SELECT EXISTS (SELECT 1 FROM {column} WHERE guild = $1 AND id = $2)"
             ))
             .bind(self.guild_id)
             .bind(id)
             .fetch_one(&db)
             .await?
-            .0
-            .expect("SELECT EXISTS is non-null");
+            .0;
+
+            // SAFETY: `SELECT EXISTS ...` is always non-null
+            let in_access_controls = unsafe { in_access_controls.unwrap_unchecked() };
 
             let (access_mode,) = sqlx::query_as::<_, (Option<bool>,)>(&format!(
-                "--sql
-                SELECT {column} FROM guild_configs WHERE id = $1
-                "
+                "SELECT {column} FROM guild_configs WHERE id = $1"
             ))
             .bind(self.guild_id)
             .fetch_one(&db)
@@ -95,19 +95,13 @@ impl CalculatorBuilder {
         self
     }
 
-    pub fn user(self, user_id: Id<UserMarker>) -> Self {
-        let id = user_id.get() as i64;
-        self.query("usr_access", id)
-    }
-
     pub fn roles<'a>(mut self, role_ids: impl Iterator<Item = &'a Id<RoleMarker>>) -> Self {
+        let column = AccessCategoryFlag::Roles.ident();
         let db = self.db.clone();
         let where_clause = role_ids.map(|id| format!("id = {id}")).join(" OR ");
         self.set.spawn(async move {
             let (Some(in_access_controls),) = sqlx::query_as::<_, (Option<bool>,)>(&format!(
-                "--sql
-                SELECT EXISTS (SELECT 1 FROM rol_access WHERE guild = $1 AND ({})) 
-                ",
+                "SELECT EXISTS (SELECT 1 FROM {column} WHERE guild = $1 AND ({}))",
                 where_clause.or("true")
             ))
             .bind(self.guild_id)
@@ -118,9 +112,7 @@ impl CalculatorBuilder {
             };
 
             let access_mode = sqlx::query!(
-                r"--sql
-                SELECT rol_access FROM guild_configs WHERE id = $1
-                ",
+                "SELECT rol_access FROM guild_configs WHERE id = $1",
                 self.guild_id
             )
             .fetch_one(&db)
@@ -135,24 +127,29 @@ impl CalculatorBuilder {
         self
     }
 
+    pub fn user(self, user_id: Id<UserMarker>) -> Self {
+        let id = user_id.get() as i64;
+        self.query(&AccessCategoryFlag::Users, id)
+    }
+
     pub fn thread(self, thread_id: Id<ChannelMarker>) -> Self {
         let id = thread_id.get() as i64;
-        self.query("xch_access", id)
+        self.query(&AccessCategoryFlag::Threads, id)
     }
 
     pub fn text_channel(self, text_channel_id: Id<ChannelMarker>) -> Self {
         let id = text_channel_id.get() as i64;
-        self.query("tch_access", id)
+        self.query(&AccessCategoryFlag::TextChannels, id)
     }
 
     pub fn voice_channel(self, voice_channel_id: Id<ChannelMarker>) -> Self {
         let id = voice_channel_id.get() as i64;
-        self.query("vch_access", id)
+        self.query(&AccessCategoryFlag::VoiceChannels, id)
     }
 
     pub fn category_channel(self, category_channel_id: Id<ChannelMarker>) -> Self {
         let id = category_channel_id.get() as i64;
-        self.query("cch_access", id)
+        self.query(&AccessCategoryFlag::CategoryChannels, id)
     }
 
     pub async fn build(mut self) -> Result<Calculator, AccessCalculatorBuildError> {
@@ -165,6 +162,57 @@ impl CalculatorBuilder {
     }
 }
 
+#[repr(u8)]
+#[derive(PartialEq, Eq, Hash)]
+enum AccessCategoryFlag {
+    Users = 0b0000_0001,
+    Roles = 0b0000_0010,
+    Threads = 0b0000_0100,
+    TextChannels = 0b0000_1000,
+    VoiceChannels = 0b0001_0000,
+    CategoryChannels = 0b0010_0000,
+}
+
+impl From<AccessCategoryFlag> for AccessCategoryFlags {
+    fn from(value: AccessCategoryFlag) -> Self {
+        Self::from_bits_retain(value as u8)
+    }
+}
+
+impl TryFrom<AccessCategoryFlags> for AccessCategoryFlag {
+    type Error = AccessCategoryFlags;
+
+    fn try_from(value: AccessCategoryFlags) -> Result<Self, Self::Error> {
+        if value.iter().count() != 1 {
+            return Err(value);
+        }
+
+        // SAFETY: `value` is guruanteed to only have one flag,
+        //         so this transmute is safe
+        Ok(unsafe { std::mem::transmute(value.bits()) })
+    }
+}
+
+impl AccessCategoryFlag {
+    const fn ident(&self) -> &'static str {
+        const POSTFIX: &str = "_access";
+        macro_rules! concat_postfix {
+            ($postfix: expr) => {
+                const_str_concat!($postfix, POSTFIX)
+            };
+        }
+
+        match self {
+            Self::Users => concat_postfix!("usr"),
+            Self::Roles => concat_postfix!("rol"),
+            Self::Threads => concat_postfix!("xch"),
+            Self::TextChannels => concat_postfix!("tch"),
+            Self::VoiceChannels => concat_postfix!("vch"),
+            Self::CategoryChannels => concat_postfix!("cch"),
+        }
+    }
+}
+
 bitflags! {
     struct AccessCategoryFlags: u8 {
         const USERS = 0b0000_0001;
@@ -189,23 +237,17 @@ impl FlagsPrettify for AccessCategoryFlags {}
 
 impl From<AccessCategory> for AccessCategoryFlags {
     fn from(category: AccessCategory) -> Self {
-        Self::from_bits_truncate(category.value() as u8)
+        Self::from_bits_retain(category.value() as u8)
     }
 }
 
 impl AccessCategoryFlags {
-    pub fn iter_names_as_column(&self) -> impl Iterator<Item = String> {
-        self.iter_names()
-            .map(|(n, _)| match n {
-                "USERS" => "usr",
-                "ROLES" => "rol",
-                "THREADS" => "xch",
-                "TEXT_CHANNELS" => "tch",
-                "VOICE_CHANNELS" => "vch",
-                "CATEGORY_CHANNELS" => "cch",
-                _ => unreachable!(),
-            })
-            .map(|n| format!("{n}_access"))
+    pub fn iter_each(&self) -> impl Iterator<Item = AccessCategoryFlag> {
+        self.iter().flat_map(Self::try_into)
+    }
+
+    pub fn iter_as_columns(&self) -> impl Iterator<Item = &'static str> {
+        self.iter_each().map(|f| f.ident())
     }
 }
 
diff --git a/lyra/src/bot/component/config/access/clear.rs b/lyra/src/bot/component/config/access/clear.rs
index 8cb2250..3b217c6 100644
--- a/lyra/src/bot/component/config/access/clear.rs
+++ b/lyra/src/bot/component/config/access/clear.rs
@@ -7,6 +7,7 @@ use crate::bot::{
         check,
         macros::{out, sus},
         model::BotSlashCommand,
+        require,
         util::prompt_for_confirmation,
         SlashCtx,
     },
@@ -14,7 +15,7 @@ use crate::bot::{
     core::r#const::text::NO_ROWS_AFFECTED_MESSAGE,
     error::CommandResult,
     ext::util::FlagsPrettify,
-    gateway::ExpectedGuildIdAware,
+    gateway::GuildIdAware,
 };
 
 /// Clears all currently configured access controls for channels, roles or members
@@ -27,12 +28,13 @@ pub struct Clear {
 
 impl BotSlashCommand for Clear {
     async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let ctx = require::guild(ctx)?;
         check::user_is_access_manager(&ctx)?;
 
         let category_flags = AccessCategoryFlags::from(self.category);
 
         let mut set = JoinSet::new();
-        category_flags.iter_names_as_column().for_each(|c| {
+        category_flags.iter_as_columns().for_each(|c| {
             let db = ctx.db().clone();
             let g = ctx.guild_id().get() as i64;
 
diff --git a/lyra/src/bot/component/config/access/edit.rs b/lyra/src/bot/component/config/access/edit.rs
index 98e1b5e..28db80f 100644
--- a/lyra/src/bot/component/config/access/edit.rs
+++ b/lyra/src/bot/component/config/access/edit.rs
@@ -1,3 +1,5 @@
+use std::collections::{HashMap, HashSet};
+
 use itertools::Itertools;
 use sqlx::{postgres::PgQueryResult, Pool, Postgres};
 use tokio::task::JoinSet;
@@ -13,17 +15,17 @@ use twilight_model::{
     },
 };
 
-use super::AccessCategoryFlags;
+use super::AccessCategoryFlag;
 use crate::bot::{
     command::{
         check,
         macros::{out, sus},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
     core::r#const::text::NO_ROWS_AFFECTED_MESSAGE,
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
+    gateway::GuildIdAware,
 };
 
 type SqlxResultJoinSet = JoinSet<Result<PgQueryResult, sqlx::Error>>;
@@ -34,16 +36,16 @@ impl AccessCategoryMarker for GenericMarker {}
 impl AccessCategoryMarker for ChannelMarker {}
 
 fn add_access<T: AccessCategoryMarker>(
-    set: &mut SqlxResultJoinSet,
-    db: Pool<Postgres>,
-    cat: &AccessCategoryFlags,
-    g: i64,
+    join_set: &mut SqlxResultJoinSet,
+    database: Pool<Postgres>,
+    category: &AccessCategoryFlag,
+    guild_id: i64,
     ids: impl IntoIterator<Item = Id<T>>,
 ) {
-    let column = cat.iter_names_as_column().next().expect("cat is non-empty");
+    let column = category.ident();
     let values_clause = ids.into_iter().map(|id| format!("($1,{id})")).join(",");
 
-    set.spawn(async move {
+    join_set.spawn(async move {
         sqlx::query(&format!(
             "--sql
             INSERT INTO {column}
@@ -56,31 +58,31 @@ fn add_access<T: AccessCategoryMarker>(
                 );
             "
         ))
-        .bind(g)
-        .execute(&db)
+        .bind(guild_id)
+        .execute(&database)
         .await
     });
 }
 
 fn remove_access<T: AccessCategoryMarker>(
-    set: &mut SqlxResultJoinSet,
-    db: Pool<Postgres>,
-    cat: &AccessCategoryFlags,
-    g: i64,
+    join_set: &mut SqlxResultJoinSet,
+    database: Pool<Postgres>,
+    category: &AccessCategoryFlag,
+    guild_id: i64,
     ids: impl IntoIterator<Item = Id<T>>,
 ) {
-    let column = cat.iter_names_as_column().next().expect("cat is non-empty");
+    let column = category.ident();
     let where_clause = ids.into_iter().map(|c| format!("id = {c}")).join(" OR ");
 
-    set.spawn(async move {
+    join_set.spawn(async move {
         sqlx::query(&format!(
             "--sql
             DELETE FROM {column}
             WHERE guild = $1 AND ({where_clause});
             ",
         ))
-        .bind(g)
-        .execute(&db)
+        .bind(guild_id)
+        .execute(&database)
         .await
     });
 }
@@ -152,10 +154,11 @@ pub struct MemberRole {
 }
 
 impl BotSlashCommand for MemberRole {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         check::user_is_access_manager(&ctx)?;
 
-        let inputted_mentionables = [
+        let input_mentionables: HashMap<_, HashSet<_>> = [
             Some(self.member_or_role),
             self.member_or_role_2,
             self.member_or_role_3,
@@ -164,41 +167,46 @@ impl BotSlashCommand for MemberRole {
         ]
         .into_iter()
         .flatten()
-        .unique_by(twilight_interactions::command::ResolvedMentionable::id)
-        .collect::<Vec<_>>();
-
-        let members = (
-            AccessCategoryFlags::USERS,
-            inputted_mentionables
-                .iter()
-                .filter(|m| matches!(m, ResolvedMentionable::User(_)))
-                .map(ResolvedMentionable::id)
-                .collect::<Vec<_>>(),
-        );
-        let roles = (
-            AccessCategoryFlags::ROLES,
-            inputted_mentionables
-                .iter()
-                .filter(|m| matches!(m, ResolvedMentionable::Role(_)))
-                .map(ResolvedMentionable::id)
-                .collect::<Vec<_>>(),
-        );
-
+        .map(|v| {
+            let flag = match v {
+                ResolvedMentionable::User(_) => AccessCategoryFlag::Users,
+                ResolvedMentionable::Role(_) => AccessCategoryFlag::Roles,
+            };
+            (flag, v.id())
+        })
+        .fold(HashMap::new(), |mut acc, (k, v)| {
+            acc.entry(k).or_default().insert(v);
+            acc
+        });
+
+        let input_mentionables_len = input_mentionables.values().fold(0, |acc, v| acc + v.len());
+
+        let database = ctx.db();
+        let guild_id = ctx.guild_id().get() as i64;
         let mut set = JoinSet::new();
-
-        let categorized_mentionables = [members, roles]
-            .into_iter()
-            .filter(|(_, mentionables)| !mentionables.is_empty());
-
-        let db = ctx.db();
-        let g = ctx.guild_id().get() as i64;
         match self.action {
-            EditAction::Add => categorized_mentionables.for_each(|(cat, mentionables)| {
-                add_access(&mut set, db.clone(), &cat, g, mentionables);
-            }),
-            EditAction::Remove => categorized_mentionables.for_each(|(cat, mentionables)| {
-                remove_access(&mut set, db.clone(), &cat, g, mentionables);
-            }),
+            EditAction::Add => {
+                for (category, mentionables) in input_mentionables {
+                    add_access(
+                        &mut set,
+                        database.clone(),
+                        &category,
+                        guild_id,
+                        mentionables,
+                    );
+                }
+            }
+            EditAction::Remove => {
+                for (category, mentionables) in input_mentionables {
+                    remove_access(
+                        &mut set,
+                        database.clone(),
+                        &category,
+                        guild_id,
+                        mentionables,
+                    );
+                }
+            }
         }
 
         let mut rows_affected = 0;
@@ -211,7 +219,7 @@ impl BotSlashCommand for MemberRole {
             sus!(NO_ROWS_AFFECTED_MESSAGE, ctx);
         }
 
-        let ignored_changes = inputted_mentionables.len() as u64 - rows_affected;
+        let ignored_changes = input_mentionables_len as u64 - rows_affected;
         let ignored_changes_notice = match ignored_changes {
             1.. => {
                 format!(
@@ -255,11 +263,13 @@ pub struct Channel {
     target_5: Option<InteractionChannel>,
 }
 
+#[allow(clippy::too_many_lines)]
 impl BotSlashCommand for Channel {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         check::user_is_access_manager(&ctx)?;
 
-        let inputted_channels = [
+        let input_channels: HashMap<_, HashSet<_>> = [
             Some(self.target),
             self.target_2,
             self.target_3,
@@ -268,67 +278,40 @@ impl BotSlashCommand for Channel {
         ]
         .into_iter()
         .flatten()
-        .unique_by(|c| c.id)
-        .collect::<Vec<_>>();
-
-        let threads = (
-            AccessCategoryFlags::THREADS,
-            inputted_channels
-                .iter()
-                .filter(|&c| {
-                    matches!(
-                        c.kind,
-                        ChannelType::PublicThread
-                            | ChannelType::PrivateThread
-                            | ChannelType::AnnouncementThread
-                    )
-                })
-                .map(|c| c.id)
-                .collect::<Vec<_>>(),
-        );
-        let text_channels = (
-            AccessCategoryFlags::TEXT_CHANNELS,
-            inputted_channels
-                .iter()
-                .filter(|c| matches!(c.kind, ChannelType::GuildText))
-                .map(|c| c.id)
-                .collect::<Vec<_>>(),
-        );
-        let voice_channels = (
-            AccessCategoryFlags::VOICE_CHANNELS,
-            inputted_channels
-                .iter()
-                .filter(|c| {
-                    matches!(
-                        c.kind,
-                        ChannelType::GuildVoice | ChannelType::GuildStageVoice
-                    )
-                })
-                .map(|c| c.id)
-                .collect::<Vec<_>>(),
-        );
-        let category_channels = (
-            AccessCategoryFlags::CATEGORY_CHANNELS,
-            inputted_channels
-                .iter()
-                .filter(|c| matches!(c.kind, ChannelType::GuildCategory))
-                .map(|c| c.id)
-                .collect::<Vec<_>>(),
-        );
-
+        .map(|v| {
+            let flag = match v.kind {
+                ChannelType::PublicThread
+                | ChannelType::PrivateThread
+                | ChannelType::AnnouncementThread => AccessCategoryFlag::Threads,
+                ChannelType::GuildVoice | ChannelType::GuildStageVoice => {
+                    AccessCategoryFlag::VoiceChannels
+                }
+                ChannelType::GuildCategory => AccessCategoryFlag::CategoryChannels,
+                _ => AccessCategoryFlag::TextChannels,
+            };
+            (flag, v.id)
+        })
+        .fold(HashMap::new(), |mut acc, (k, v)| {
+            acc.entry(k).or_default().insert(v);
+            acc
+        });
+
+        let input_channels_len = input_channels.values().fold(0, |acc, v| acc + v.len());
+
+        let database = ctx.db();
+        let guild_id = ctx.guild_id().get() as i64;
         let mut set = JoinSet::new();
-
-        let categorized_channels = [threads, text_channels, voice_channels, category_channels]
-            .into_iter()
-            .filter(|(_, channels)| !channels.is_empty());
-
-        let db = ctx.db();
-        let g = ctx.guild_id().get() as i64;
         match self.action {
-            EditAction::Add => categorized_channels
-                .for_each(|(cat, channels)| add_access(&mut set, db.clone(), &cat, g, channels)),
-            EditAction::Remove => categorized_channels
-                .for_each(|(cat, channels)| remove_access(&mut set, db.clone(), &cat, g, channels)),
+            EditAction::Add => {
+                for (category, channels) in input_channels {
+                    add_access(&mut set, database.clone(), &category, guild_id, channels);
+                }
+            }
+            EditAction::Remove => {
+                for (category, channels) in input_channels {
+                    remove_access(&mut set, database.clone(), &category, guild_id, channels);
+                }
+            }
         }
 
         let mut rows_affected = 0;
@@ -341,7 +324,7 @@ impl BotSlashCommand for Channel {
             sus!(NO_ROWS_AFFECTED_MESSAGE, ctx);
         }
 
-        let ignored_changes = inputted_channels.len() as u64 - rows_affected;
+        let ignored_changes = input_channels_len as u64 - rows_affected;
         let ignored_changes_notice = match ignored_changes {
             1.. => {
                 format!(
diff --git a/lyra/src/bot/component/config/access/mode.rs b/lyra/src/bot/component/config/access/mode.rs
index ed3d71c..6481c11 100644
--- a/lyra/src/bot/component/config/access/mode.rs
+++ b/lyra/src/bot/component/config/access/mode.rs
@@ -7,13 +7,13 @@ use crate::bot::{
         check,
         macros::{out, sus},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
     component::config::access::AccessCategoryFlags,
     core::r#const::text::NO_ROWS_AFFECTED_MESSAGE,
     error::CommandResult,
     ext::util::FlagsPrettify,
-    gateway::ExpectedGuildIdAware,
+    gateway::GuildIdAware,
 };
 
 pub(super) trait AccessModePrettify {
@@ -71,7 +71,8 @@ pub struct Mode {
 }
 
 impl BotSlashCommand for Mode {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         check::user_is_access_manager(&ctx)?;
 
         let access_mode = <Option<bool>>::from(self.mode);
@@ -79,11 +80,11 @@ impl BotSlashCommand for Mode {
 
         let category_flags = AccessCategoryFlags::from(self.category);
         let set_statements = category_flags
-            .iter_names_as_column()
+            .iter_as_columns()
             .map(|c| format!("{c} = $2"))
             .join(",");
         let where_clause = category_flags
-            .iter_names_as_column()
+            .iter_as_columns()
             .map(|c| format!("{c} IS NOT {sql_access_mode}"))
             .join(" OR ");
 
diff --git a/lyra/src/bot/component/config/access/view.rs b/lyra/src/bot/component/config/access/view.rs
index a66d58d..8b1662d 100644
--- a/lyra/src/bot/component/config/access/view.rs
+++ b/lyra/src/bot/component/config/access/view.rs
@@ -9,12 +9,12 @@ use twilight_model::id::{
 use twilight_util::builder::embed::{EmbedBuilder, EmbedFieldBuilder};
 
 use crate::bot::{
-    command::{model::BotSlashCommand, SlashCtx},
+    command::{model::BotSlashCommand, require, SlashCtx},
     component::config::access::mode::AccessModePrettify,
     core::r#const::{colours::EMBED_DEFAULT, text::EMPTY_EMBED_FIELD},
     error::CommandResult,
     ext::util::OptionMap,
-    gateway::ExpectedGuildIdAware,
+    gateway::GuildIdAware,
 };
 
 /// Views the currently configured access controls for channels, roles and members
@@ -23,7 +23,8 @@ use crate::bot::{
 pub struct View;
 
 impl BotSlashCommand for View {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         let guild_id = ctx.guild_id().get() as i64;
         let db = ctx.db();
 
diff --git a/lyra/src/bot/component/config/now_playing.rs b/lyra/src/bot/component/config/now_playing.rs
index ffa3bc2..900d9d3 100644
--- a/lyra/src/bot/component/config/now_playing.rs
+++ b/lyra/src/bot/component/config/now_playing.rs
@@ -1,9 +1,9 @@
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
 use crate::bot::{
-    command::{macros::out, model::BotSlashCommand, SlashCtx},
+    command::{macros::out, model::BotSlashCommand, require, SlashCtx},
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
+    gateway::GuildIdAware,
 };
 use lyra_proc::BotCommandGroup;
 
@@ -20,11 +20,10 @@ pub enum NowPlaying {
 pub struct Toggle;
 
 impl BotSlashCommand for Toggle {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         let new_now_playing = sqlx::query!(
-            r"--sql
-            UPDATE guild_configs SET now_playing = NOT now_playing WHERE id = $1 RETURNING now_playing;
-            ",
+            "UPDATE guild_configs SET now_playing = NOT now_playing WHERE id = $1 RETURNING now_playing;",
             ctx.guild_id().get() as i64,
         )
         .fetch_one(ctx.db())
diff --git a/lyra/src/bot/component/connection.rs b/lyra/src/bot/component/connection.rs
index 6ac06fd..ae85faa 100644
--- a/lyra/src/bot/component/connection.rs
+++ b/lyra/src/bot/component/connection.rs
@@ -33,7 +33,7 @@ use crate::bot::{
             HandleVoiceStateUpdateError, MatchStateChannelIdError, StartInactivityTimeoutError,
         },
     },
-    gateway::{voice, ExpectedGuildIdAware, SenderAware},
+    gateway::{voice, GuildIdAware, SenderAware},
     lavalink::{self, LavalinkAware},
 };
 
@@ -56,7 +56,7 @@ struct InactivityTimeoutContext {
 }
 
 impl InactivityTimeoutContext {
-    fn new_via(ctx: &(impl OwnedBotStateAware + SenderAware + ExpectedGuildIdAware)) -> Self {
+    fn new_via(ctx: &(impl OwnedBotStateAware + SenderAware + GuildIdAware)) -> Self {
         Self {
             inner: ctx.bot_owned(),
             sender: ctx.sender().clone(),
@@ -89,7 +89,7 @@ impl HttpAware for InactivityTimeoutContext {
     }
 }
 
-impl ExpectedGuildIdAware for InactivityTimeoutContext {
+impl GuildIdAware for InactivityTimeoutContext {
     fn guild_id(&self) -> Id<GuildMarker> {
         self.guild_id
     }
@@ -108,13 +108,16 @@ async fn start_inactivity_timeout(
     );
 
     for _ in 0..const_connection::INACTIVITY_TIMEOUT_POLL_N {
-        tokio::time::sleep(*const_connection::INACTIVITY_TIMEOUT_POLL_INTERVAL).await;
+        tokio::time::sleep(*const_connection::inactivity_timeout_poll_interval()).await;
         if users_in_voice(&ctx, channel_id).is_some_and(|n| n >= 1) {
             return Ok(());
         }
     }
 
-    ctx.lavalink().notify_connection_change(guild_id);
+    let Some(connection) = ctx.lavalink().get_connection(guild_id) else {
+        return Ok(());
+    };
+    connection.notify_change();
     pre_disconnect_cleanup(&ctx).await?;
     disconnect(&ctx)?;
 
diff --git a/lyra/src/bot/component/connection/join.rs b/lyra/src/bot/component/connection/join.rs
index 45af064..af45ace 100644
--- a/lyra/src/bot/component/connection/join.rs
+++ b/lyra/src/bot/component/connection/join.rs
@@ -19,12 +19,15 @@ use crate::bot::{
     command::{
         check,
         macros::{bad, cant, nope, note, note_fol, out, sus_fol},
-        model::{BotSlashCommand, Ctx, CtxKind, RespondViaMessage},
+        model::{BotSlashCommand, CtxKind, GuildCtx, RespondViaMessage},
+        require::{self, InVoiceCachedVoiceState},
         SlashCtx,
     },
     component::connection::{start_inactivity_timeout, users_in_voice},
     core::{
-        model::{BotState, BotStateAware, CacheAware, HttpAware, OwnedBotStateAware},
+        model::{
+            AuthorIdAware, BotState, BotStateAware, CacheAware, HttpAware, OwnedBotStateAware,
+        },
         r#const::connection::INACTIVITY_TIMEOUT_SECS,
         traced,
     },
@@ -37,8 +40,8 @@ use crate::bot::{
         },
         Cache as CacheError, CommandResult, UserNotInVoice as UserNotInVoiceError,
     },
-    gateway::{ExpectedGuildIdAware, SenderAware},
-    lavalink::LavalinkAware,
+    gateway::{GuildIdAware, SenderAware},
+    lavalink::{Connection, LavalinkAware},
 };
 
 pub(super) enum Response {
@@ -79,7 +82,7 @@ impl JoinedChannel {
         let kind = match kind {
             ChannelType::GuildVoice => JoinedChannelType::Voice,
             ChannelType::GuildStageVoice => JoinedChannelType::Stage,
-            _ => unreachable!(),
+            _ => panic!("unknown channel type: {kind:?}"),
         };
         Self { id, kind }
     }
@@ -97,7 +100,7 @@ impl Display for JoinedChannel {
 type GetUsersVoiceChannelResult =
     Result<(Id<ChannelMarker>, ChannelType, Option<Id<ChannelMarker>>), GetUsersVoiceChannelError>;
 
-fn get_users_voice_channel(ctx: &Ctx<impl CtxKind>) -> GetUsersVoiceChannelResult {
+fn get_users_voice_channel(ctx: &GuildCtx<impl CtxKind>) -> GetUsersVoiceChannelResult {
     let voice_state = ctx
         .cache()
         .voice_state(ctx.author_id(), ctx.guild_id())
@@ -112,7 +115,7 @@ fn get_users_voice_channel(ctx: &Ctx<impl CtxKind>) -> GetUsersVoiceChannelResul
 }
 
 async fn impl_join(
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &GuildCtx<impl CtxKind>,
     channel: Option<InteractionChannel>,
 ) -> Result<Response, ImplJoinError> {
     let (channel_id, channel_type, channel_parent_id) = match channel {
@@ -123,7 +126,7 @@ async fn impl_join(
     Ok(connect_to(channel_id, channel_type, channel_parent_id, ctx).await?)
 }
 
-async fn impl_auto_join(ctx: &Ctx<impl CtxKind>) -> Result<Response, ImplAutoJoinError> {
+async fn impl_auto_join(ctx: &GuildCtx<impl CtxKind>) -> Result<Response, ImplAutoJoinError> {
     let (channel_id, channel_type, channel_parent_id) = get_users_voice_channel(ctx)?;
 
     Ok(connect_to_new(channel_id, channel_type, channel_parent_id, ctx).await?)
@@ -131,7 +134,7 @@ async fn impl_auto_join(ctx: &Ctx<impl CtxKind>) -> Result<Response, ImplAutoJoi
 
 fn check_user_is_stage_manager(
     channel_type: ChannelType,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &GuildCtx<impl CtxKind>,
 ) -> Result<(), error::UserNotStageManager> {
     if channel_type == ChannelType::GuildStageVoice {
         check::user_is_stage_manager(ctx)?;
@@ -143,7 +146,7 @@ async fn connect_to_new(
     channel_id: Id<ChannelMarker>,
     channel_type: ChannelType,
     channel_parent_id: Option<Id<ChannelMarker>>,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &GuildCtx<impl CtxKind>,
 ) -> Result<Response, ConnectToNewError> {
     check_user_is_stage_manager(channel_type, ctx)?;
 
@@ -162,7 +165,7 @@ async fn connect_to(
     channel_id: Id<ChannelMarker>,
     channel_type: ChannelType,
     channel_parent_id: Option<Id<ChannelMarker>>,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &GuildCtx<impl CtxKind>,
 ) -> Result<Response, ConnectToError> {
     check_user_is_stage_manager(channel_type, ctx)?;
 
@@ -197,10 +200,10 @@ async fn impl_connect_to(
     channel_type: ChannelType,
     old_channel_id: Option<Id<ChannelMarker>>,
     guild_id: Id<GuildMarker>,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &GuildCtx<impl CtxKind>,
 ) -> Result<Response, ImplConnectToError> {
     if !ctx
-        .bot_permissions_for(channel_id)
+        .bot_permissions_for(channel_id)?
         .contains(Permissions::CONNECT)
     {
         Err(error::ConnectionForbidden(channel_id))?;
@@ -214,15 +217,25 @@ async fn impl_connect_to(
 
     let response = old_channel_id.map_or_else(
         || {
-            ctx.lavalink()
-                .new_connection(guild_id, channel_id, ctx.channel_id());
+            let connection = Connection::new(channel_id, ctx.channel_id());
+            connection.notify_change();
+            ctx.lavalink().new_connection_with(guild_id, connection);
             Response::Joined {
                 voice: joined,
                 empty: voice_is_empty,
             }
         },
         |from| {
-            ctx.lavalink().connection_mut(guild_id).channel_id = channel_id;
+            let mut connection =
+            // SAFETY: `old_channel_id` is of variant `Some`, meaning another connection exists,
+            //         so `ctx.lavalink().get_connection_mut(guild_id).unwrap_unchecked()` is safe
+            unsafe {
+                ctx.lavalink()
+                    .get_connection_mut(guild_id)
+                    .unwrap_unchecked()
+            };
+            connection.channel_id = channel_id;
+            connection.notify_change();
             Response::Moved {
                 from,
                 to: joined,
@@ -231,7 +244,6 @@ async fn impl_connect_to(
         },
     );
 
-    ctx.lavalink().notify_connection_change(guild_id);
     ctx.sender()
         .command(&UpdateVoiceState::new(guild_id, channel_id, true, false))?;
 
@@ -258,7 +270,7 @@ struct DeleteEmptyVoiceNotice {
 
 impl DeleteEmptyVoiceNotice {
     fn new(
-        ctx: &Ctx<impl CtxKind>,
+        ctx: &GuildCtx<impl CtxKind>,
         message_id: Id<MessageMarker>,
         channel_id: Id<ChannelMarker>,
     ) -> Self {
@@ -306,8 +318,8 @@ fn stage_fmt(txt: &str, stage: bool) -> Cow<'_, str> {
 
 async fn handle_response(
     response: Response,
-    ctx: &mut Ctx<impl RespondViaMessage>,
-) -> Result<(), HandleResponseError> {
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
+) -> Result<InVoiceCachedVoiceState, HandleResponseError> {
     let (joined, empty) = match response {
         Response::Joined { voice, empty } => {
             let stage = matches!(voice.kind, JoinedChannelType::Stage);
@@ -349,24 +361,27 @@ async fn handle_response(
         )));
     }
 
-    let muted = ctx.current_voice_state().ok_or(CacheError)?.mute();
+    let state = ctx.current_voice_state().ok_or(CacheError)?;
+    let muted = state.mute();
     if muted {
         sus_fol!(
             "Currently server muted; Some features will be limited.",
             ?ctx
         );
     }
-    Ok(())
+    Ok(state.into())
 }
 
-pub async fn auto(ctx: &mut Ctx<impl RespondViaMessage>) -> Result<(), AutoJoinError> {
+pub async fn auto(
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
+) -> Result<InVoiceCachedVoiceState, AutoJoinError> {
     Ok(handle_response(impl_auto_join(ctx).await?, ctx).await?)
 }
 
 pub async fn join(
-    ctx: &mut Ctx<impl RespondViaMessage>,
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
     channel: Option<InteractionChannel>,
-) -> Result<(), JoinError> {
+) -> Result<InVoiceCachedVoiceState, JoinError> {
     Ok(handle_response(impl_join(ctx, channel).await?, ctx).await?)
 }
 
@@ -380,7 +395,8 @@ pub struct Join {
 }
 
 impl BotSlashCommand for Join {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         let Err(e) = join(&mut ctx, self.channel).await else {
             return Ok(());
         };
diff --git a/lyra/src/bot/component/connection/leave.rs b/lyra/src/bot/component/connection/leave.rs
index fa22670..b354a87 100644
--- a/lyra/src/bot/component/connection/leave.rs
+++ b/lyra/src/bot/component/connection/leave.rs
@@ -12,15 +12,15 @@ use crate::bot::{
     command::{
         check,
         macros::{caut, out},
-        model::{BotSlashCommand, Ctx, CtxKind},
-        SlashCtx,
+        model::{BotSlashCommand, CtxKind, GuildCtx},
+        require, SlashCtx,
     },
     error::{
         component::connection::leave::{self, PreDisconnectCleanupError},
         CommandResult,
     },
-    gateway::{ExpectedGuildIdAware, SenderAware},
-    lavalink::{self, LavalinkAware},
+    gateway::{GuildIdAware, SenderAware},
+    lavalink::{self, Event, LavalinkAware},
 };
 
 pub(super) struct LeaveResponse(pub(super) Id<ChannelMarker>);
@@ -31,9 +31,7 @@ impl Display for LeaveResponse {
     }
 }
 
-pub(super) fn disconnect(
-    ctx: &(impl SenderAware + ExpectedGuildIdAware),
-) -> Result<(), ChannelError> {
+pub(super) fn disconnect(ctx: &(impl SenderAware + GuildIdAware)) -> Result<(), ChannelError> {
     ctx.sender()
         .command(&UpdateVoiceState::new(ctx.guild_id(), None, false, false))?;
 
@@ -41,26 +39,29 @@ pub(super) fn disconnect(
 }
 
 pub(super) async fn pre_disconnect_cleanup(
-    ctx: &(impl ExpectedGuildIdAware + lavalink::LavalinkAware + Sync),
+    ctx: &(impl GuildIdAware + lavalink::LavalinkAware + Sync),
 ) -> Result<(), PreDisconnectCleanupError> {
     let guild_id = ctx.guild_id();
     let lavalink = ctx.lavalink();
 
-    lavalink.dispatch_queue_clear(guild_id);
+    if let Some(connection) = lavalink.get_connection(guild_id) {
+        connection.dispatch(Event::QueueClear);
+    };
     lavalink.drop_connection(guild_id);
     lavalink.delete_player(guild_id).await?;
 
     Ok(())
 }
 
-async fn leave(ctx: &Ctx<impl CtxKind>) -> Result<LeaveResponse, leave::Error> {
+async fn leave(ctx: &GuildCtx<impl CtxKind>) -> Result<LeaveResponse, leave::Error> {
     let guild_id = ctx.guild_id();
 
-    let in_voice = check::in_voice(ctx)?;
+    let in_voice = require::in_voice(ctx)?;
+    let connection = ctx.lavalink().connection_from(&in_voice);
     let channel_id = in_voice.channel_id();
-    in_voice.with_user()?.only()?;
+    check::in_voice_with_user(in_voice)?.only()?;
 
-    ctx.lavalink().notify_connection_change(guild_id);
+    connection.notify_change();
     pre_disconnect_cleanup(ctx).await?;
     disconnect(ctx)?;
 
@@ -75,7 +76,8 @@ async fn leave(ctx: &Ctx<impl CtxKind>) -> Result<LeaveResponse, leave::Error> {
 pub struct Leave;
 
 impl BotSlashCommand for Leave {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         match leave(&ctx).await {
             Ok(LeaveResponse(voice)) => {
                 out!(format!("📎 ~~{}~~", voice.mention()), ctx);
diff --git a/lyra/src/bot/component/queue.rs b/lyra/src/bot/component/queue.rs
index bfd2914..4275c3a 100644
--- a/lyra/src/bot/component/queue.rs
+++ b/lyra/src/bot/component/queue.rs
@@ -26,24 +26,24 @@ use twilight_model::application::command::{CommandOptionChoice, CommandOptionCho
 use crate::bot::{
     command::{
         macros::{note_fol, out},
-        model::{Ctx, CtxKind, RespondViaMessage},
+        model::{GuildCtx, RespondViaMessage},
+        require::Player,
     },
     core::{
         model::{CacheAware, InteractionClient},
         r#const::{
-            discord::COMMAND_CHOICES_LIMIT, misc::ADD_TRACKS_WRAP_LIMIT, text::FUZZY_MATCHER,
+            discord::COMMAND_CHOICES_LIMIT, misc::ADD_TRACKS_WRAP_LIMIT, text::fuzzy_matcher,
         },
     },
     error::{component::queue::RemoveTracksError, PositionOutOfRange as PositionOutOfRangeError},
     ext::util::{PrettifiedTimestamp, PrettyJoiner, PrettyTruncator},
-    gateway::ExpectedGuildIdAware,
-    lavalink::{CorrectTrackInfo, ExpectedPlayerDataAware, LavalinkAware, QueueItem},
+    lavalink::{CorrectTrackInfo, QueueItem},
 };
 
 fn generate_position_choice(
     position: NonZeroUsize,
     track: &QueueItem,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &impl CacheAware,
 ) -> CommandOptionChoice {
     let track_info = &track.track().info;
     let track_length = PrettifiedTimestamp::from(Duration::milliseconds(track_info.length as i64));
@@ -76,7 +76,7 @@ fn generate_position_choices<'a>(
     queue_len: NonZeroUsize,
     queue_iter: impl Iterator<Item = (NonZeroUsize, &'a QueueItem)> + Clone,
     excluded: &HashSet<NonZeroUsize>,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &impl CacheAware,
 ) -> Vec<CommandOptionChoice> {
     impl_generate_position_choices(
         queue_iter
@@ -93,7 +93,7 @@ fn generate_position_choices_reversed<'a>(
     queue_len: NonZeroUsize,
     queue_iter: impl Clone + DoubleEndedIterator<Item = (NonZeroUsize, &'a QueueItem)>,
     excluded: &HashSet<NonZeroUsize>,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &impl CacheAware,
 ) -> Vec<CommandOptionChoice> {
     impl_generate_position_choices(
         queue_iter
@@ -109,7 +109,7 @@ fn generate_position_choices_reversed<'a>(
 fn impl_generate_position_choices<'a>(
     queue_iter: impl Iterator<Item = (NonZeroUsize, &'a QueueItem)> + Clone,
     excluded: &HashSet<NonZeroUsize>,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &impl CacheAware,
 ) -> Vec<CommandOptionChoice> {
     queue_iter
         .filter(|(p, _)| !excluded.contains(p))
@@ -123,7 +123,7 @@ fn generate_position_choices_from_input<'a>(
     queue_len: NonZeroUsize,
     queue_iter: impl Clone + DoubleEndedIterator<Item = (NonZeroUsize, &'a QueueItem)>,
     excluded: &HashSet<NonZeroUsize>,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &impl CacheAware,
 ) -> Vec<CommandOptionChoice> {
     normalize_queue_position(input, queue_len)
         .filter(|p| !excluded.contains(p))
@@ -139,7 +139,7 @@ fn generate_position_choices_from_fuzzy_match<'a>(
     focused: &str,
     queue_iter: impl Iterator<Item = (NonZeroUsize, &'a QueueItem)>,
     excluded: &HashSet<NonZeroUsize>,
-    ctx: &Ctx<impl CtxKind>,
+    ctx: &impl CacheAware,
 ) -> Vec<CommandOptionChoice> {
     let queue_iter = queue_iter
         .filter_map(|(p, t)| {
@@ -150,7 +150,7 @@ fn generate_position_choices_from_fuzzy_match<'a>(
             Some((
                 p,
                 t,
-                FUZZY_MATCHER.fuzzy_match(&format!("{requester} {author} {title}",), focused)?,
+                fuzzy_matcher().fuzzy_match(&format!("{requester} {author} {title}",), focused)?,
             ))
         })
         .sorted_by_key(|(_, _, s)| -s)
@@ -192,9 +192,10 @@ fn validate_input_positions(
 async fn remove_range(
     start: i64,
     end: i64,
-    ctx: &mut Ctx<impl RespondViaMessage>,
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
+    player: &Player,
 ) -> Result<(), RemoveTracksError> {
-    let data = ctx.player_data();
+    let data = player.data();
     let mut data_w = data.write().await;
     let queue = data_w.queue_mut();
 
@@ -213,14 +214,15 @@ async fn remove_range(
         .collect();
 
     drop(data_w);
-    impl_remove(positions, removed, queue_cleared, ctx).await
+    impl_remove(positions, removed, queue_cleared, ctx, player).await
 }
 
 async fn remove(
     positions: Box<[NonZeroUsize]>,
-    ctx: &mut Ctx<impl RespondViaMessage>,
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
+    player: &Player,
 ) -> Result<(), RemoveTracksError> {
-    let data = ctx.player_data();
+    let data = player.data();
     let mut data_w = data.write().await;
     let queue = data_w.queue_mut();
 
@@ -234,16 +236,17 @@ async fn remove(
     };
 
     drop(data_w);
-    impl_remove(positions, removed, queue_cleared, ctx).await
+    impl_remove(positions, removed, queue_cleared, ctx, player).await
 }
 
 async fn impl_remove(
     positions: Box<[NonZeroUsize]>,
     removed: Vec<QueueItem>,
     queue_cleared: bool,
-    ctx: &mut Ctx<impl RespondViaMessage>,
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
+    player: &Player,
 ) -> Result<(), RemoveTracksError> {
-    let data = ctx.player_data();
+    let data = player.data();
     let mut data_w = data.write().await;
     let queue = data_w.queue_mut();
 
@@ -258,7 +261,9 @@ async fn impl_remove(
         _ => format!("`{removed_len} tracks`"),
     };
     let minus = match removed_len {
-        0 => unreachable!(),
+        // SAFETY: `/remove` always remove at least one track after input positions have been validated,
+        //         so this branch is unreachable
+        0 => unsafe { std::hint::unreachable_unchecked() },
         1 => "**`ー`**",
         _ => "**`≡-`**",
     };
@@ -270,12 +275,11 @@ async fn impl_remove(
     if positions.binary_search(&current).is_ok() {
         queue.adjust_repeat_mode();
         let next = queue.current().map(|t| t.track().clone());
-        let guild_id = ctx.guild_id();
 
         queue
-            .with_advance_lock_and_stopped(guild_id, ctx.lavalink(), |player| async move {
+            .with_advance_lock_and_stopped(&player.context, |p| async move {
                 if let Some(ref next) = next {
-                    player.play(next).await?;
+                    p.play(next).await?;
                 }
                 Ok(())
             })
diff --git a/lyra/src/bot/component/queue/clear.rs b/lyra/src/bot/component/queue/clear.rs
index d360326..98b7ce2 100644
--- a/lyra/src/bot/component/queue/clear.rs
+++ b/lyra/src/bot/component/queue/clear.rs
@@ -7,10 +7,10 @@ use crate::bot::{
         check,
         macros::out,
         model::{BotSlashCommand, SlashCtx},
+        require,
     },
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
-    lavalink::{DelegateMethods, Event, LavalinkAware},
+    lavalink::{Event, LavalinkAware},
 };
 
 /// Clears the queue
@@ -19,15 +19,14 @@ use crate::bot::{
 pub struct Clear;
 
 impl BotSlashCommand for Clear {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        let in_voice_with_user = check::in_voice(&ctx)?.with_user()?;
-        check::queue_not_empty(&ctx).await?;
-        check::not_suppressed(&ctx)?;
-
-        let guild_id = ctx.guild_id();
-        let lavalink = ctx.lavalink();
-
-        let data = lavalink.player_data(guild_id);
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let in_voice = require::in_voice(&ctx)?.and_unsuppressed()?;
+        let connection = ctx.lavalink().connection_from(&in_voice);
+        let in_voice_with_user = check::in_voice_with_user(in_voice)?;
+        let player = require::player(&ctx)?.and_queue_not_empty().await?;
+
+        let data = player.data();
         {
             let data_r = data.read().await;
             let queue = data_r.queue();
@@ -35,8 +34,9 @@ impl BotSlashCommand for Clear {
             let positions = (1..=queue.len()).filter_map(NonZeroUsize::new);
             check::all_users_track(positions, in_voice_with_user, queue, &ctx)?;
 
-            queue.stop_with_advance_lock(guild_id, lavalink).await?;
-            lavalink.dispatch(guild_id, Event::QueueClear);
+            queue.stop_with_advance_lock(&player.context).await?;
+            connection.dispatch(Event::QueueClear);
+            drop(connection);
         }
 
         {
diff --git a/lyra/src/bot/component/queue/fair_queue.rs b/lyra/src/bot/component/queue/fair_queue.rs
index 6f504cf..9f1aa7d 100644
--- a/lyra/src/bot/component/queue/fair_queue.rs
+++ b/lyra/src/bot/component/queue/fair_queue.rs
@@ -5,11 +5,10 @@ use crate::bot::{
         check,
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
-    lavalink::{DelegateMethods, IndexerType, LavalinkAware},
+    lavalink::IndexerType,
 };
 
 /// Toggles fair queuing
@@ -18,13 +17,13 @@ use crate::bot::{
 pub struct FairQueue;
 
 impl BotSlashCommand for FairQueue {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         check::user_is_dj(&ctx)?;
-        check::in_voice(&ctx)?.with_someone_else()?;
-        check::queue_not_empty(&ctx).await?;
+        let _ = require::in_voice(&ctx)?.and_with_someone_else()?;
+        let player = require::player(&ctx)?.and_queue_not_empty().await?;
 
-        let guild_id = ctx.guild_id();
-        let data = ctx.lavalink().player_data(guild_id);
+        let data = player.data();
         let indexer_type = data.read().await.queue().indexer_type();
 
         match indexer_type {
diff --git a/lyra/src/bot/component/queue/move.rs b/lyra/src/bot/component/queue/move.rs
index 69f6fa0..abfa347 100644
--- a/lyra/src/bot/component/queue/move.rs
+++ b/lyra/src/bot/component/queue/move.rs
@@ -8,11 +8,12 @@ use crate::bot::{
         check,
         macros::{bad, out, sus},
         model::{BotAutocomplete, BotSlashCommand},
-        AutocompleteCtx, SlashCtx,
+        require, AutocompleteCtx, SlashCtx,
     },
     component::queue::normalize_queue_position,
+    core::model::CacheAware,
     error::{command::AutocompleteResult, CommandResult},
-    lavalink::{CorrectTrackInfo, ExpectedPlayerDataAware, PlayerDataAware},
+    lavalink::{CorrectTrackInfo, PlayerAware},
 };
 
 enum MoveAutocompleteOptionType {
@@ -29,11 +30,12 @@ struct MoveAutocompleteOptions {
 
 async fn generate_move_autocomplete_choices(
     options: &MoveAutocompleteOptions,
-    ctx: &AutocompleteCtx,
+    ctx: &(impl PlayerAware + CacheAware + Sync),
 ) -> Vec<CommandOptionChoice> {
-    let Some(data) = ctx.get_player_data() else {
+    let Ok(player) = require::player(ctx) else {
         return Vec::new();
     };
+    let data = player.data();
     let data_r = data.read().await;
     let (queue, Some(queue_len)) = (data_r.queue(), NonZeroUsize::new(data_r.queue().len())) else {
         return Vec::new();
@@ -103,7 +105,8 @@ pub struct Autocomplete {
 }
 
 impl BotAutocomplete for Autocomplete {
-    async fn execute(self, mut ctx: AutocompleteCtx) -> AutocompleteResult {
+    async fn execute(self, ctx: AutocompleteCtx) -> AutocompleteResult {
+        let mut ctx = require::guild(ctx)?;
         let (focused, kind) = match (self.track, self.position) {
             (AutocompleteValue::Focused(focused), AutocompleteValue::None) => {
                 (focused, MoveAutocompleteOptionType::TrackFocused)
@@ -119,7 +122,9 @@ impl BotAutocomplete for Autocomplete {
                 focused,
                 MoveAutocompleteOptionType::PositionFocusedTrackCompleted(i),
             ),
-            _ => unreachable!(),
+            // SAFETY: only one autocomplete options can be focused at a time,
+            //         so this branch is unreachable
+            _ => unsafe { std::hint::unreachable_unchecked() },
         };
 
         let options = MoveAutocompleteOptions {
@@ -144,18 +149,18 @@ pub struct Move {
 }
 
 impl BotSlashCommand for Move {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        let in_voice_with_user = check::in_voice(&ctx)?.with_user()?;
-        check::queue_not_empty(&ctx).await?;
-        check::not_suppressed(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let in_voice_with_user =
+            check::in_voice_with_user(require::in_voice(&ctx)?.and_unsuppressed()?)?;
+        let player = require::player(&ctx)?.and_queue_not_empty().await?;
 
-        let data = ctx.player_data();
+        let data = player.data();
         let mut data_w = data.write().await;
         let queue = data_w.queue_mut();
         let queue_len = queue.len();
 
         if queue_len == 1 {
-            drop(in_voice_with_user);
             sus!(
                 "Nowhere to move the track as it is the only track in the queue.",
                 ctx
@@ -165,24 +170,22 @@ impl BotSlashCommand for Move {
         super::validate_input_positions(&[self.track, self.position], queue_len)?;
 
         if self.track == self.position {
-            drop(in_voice_with_user);
             bad!(
                 format!("Invalid new position: {}; New position must be different from the old position", self.position),
                 ctx
             );
         }
 
-        let position =
-            NonZeroUsize::new(self.position as usize).expect("self.position is non-zero");
+        // SAFETY: `self.track as usize` is in range [1, +inf), so it is non-zero
+        let position = unsafe { NonZeroUsize::new_unchecked(self.position as usize) };
         check::users_track(position, in_voice_with_user, queue, &ctx)?;
 
-        let track_position =
-            NonZeroUsize::new(self.track as usize).expect("self.track is non-zero");
+        // SAFETY: `self.track as usize` is in range [1, +inf), so it is non-zero
+        let track_position = unsafe { NonZeroUsize::new_unchecked(self.track as usize) };
         let queue_position = queue.position();
 
-        let track = queue
-            .remove(track_position.get() - 1)
-            .expect("self.track is in bounds");
+        // SAFETY: `track_position.get() - 1` has been validated to be in-bounds, so this unwrap is safe
+        let track = unsafe { queue.remove(track_position.get() - 1).unwrap_unchecked() };
         let track_title = track.track().info.corrected_title();
         let message = format!("⤴️ Moved `{track_title}` to position **`{position}`**");
 
diff --git a/lyra/src/bot/component/queue/play.rs b/lyra/src/bot/component/queue/play.rs
index 849b26e..71d543d 100644
--- a/lyra/src/bot/component/queue/play.rs
+++ b/lyra/src/bot/component/queue/play.rs
@@ -1,3 +1,5 @@
+use std::hint::unreachable_unchecked;
+
 use chrono::Duration;
 use futures::future;
 use itertools::{Either, Itertools};
@@ -22,18 +24,24 @@ use twilight_util::builder::command::CommandBuilder;
 use crate::bot::{
     command::{
         macros::{bad, crit, out_or_fol, what},
-        model::{BotAutocomplete, BotMessageCommand, BotSlashCommand, Ctx, RespondViaMessage},
-        util, AutocompleteCtx, MessageCtx, SlashCtx,
+        model::{BotAutocomplete, BotMessageCommand, BotSlashCommand, GuildCtx, RespondViaMessage},
+        require, util, AutocompleteCtx, MessageCtx, SlashCtx,
+    },
+    core::{
+        model::AuthorIdAware,
+        r#const::{discord::COMMAND_CHOICES_LIMIT, misc::ADD_TRACKS_WRAP_LIMIT, regex},
     },
-    core::r#const::{discord::COMMAND_CHOICES_LIMIT, misc::ADD_TRACKS_WRAP_LIMIT, regex},
     error::{
         command::AutocompleteResult,
         component::queue::play::{self, LoadTrackProcessManyError, QueryError},
         CommandResult, LoadFailed as LoadFailedError,
     },
     ext::util::{PrettifiedTimestamp, PrettyJoiner, PrettyTruncator, ViaGrapheme},
-    gateway::ExpectedGuildIdAware,
-    lavalink::{CorrectPlaylistInfo, CorrectTrackInfo, DelegateMethods, LavalinkAware},
+    gateway::GuildIdAware,
+    lavalink::{
+        CorrectPlaylistInfo, CorrectTrackInfo, LavalinkAware, UnwrappedPlayerData,
+        UnwrappedPlayerInfoUri,
+    },
 };
 
 struct LoadTrackContext {
@@ -42,7 +50,7 @@ struct LoadTrackContext {
 }
 
 impl LoadTrackContext {
-    fn new_via(ctx: &(impl ExpectedGuildIdAware + LavalinkAware)) -> Self {
+    fn new_via(ctx: &(impl GuildIdAware + LavalinkAware)) -> Self {
         Self {
             guild_id: ctx.guild_id(),
             lavalink: ctx.lavalink().clone_inner(),
@@ -64,7 +72,9 @@ impl LoadTrackContext {
             match loaded.load_type {
                 TrackLoadType::Track => {
                     let Some(TrackLoadData::Track(t)) = loaded.data else {
-                        unreachable!()
+                        // SAFETY: `loaded.load_type` is `Track`,
+                        //         so `loaded.data` must be `TrackLoadData::Track(_)`
+                        unsafe { unreachable_unchecked() }
                     };
                     Ok(LoadTrackResult::Track(t))
                 }
@@ -99,7 +109,9 @@ impl Playlist {
         match loaded.load_type {
             TrackLoadType::Playlist => {
                 let Some(TrackLoadData::Playlist(data)) = loaded.data else {
-                    unreachable!()
+                    // SAFETY: `loaded.load_type` is `Playlist`,
+                    //         so `loaded.data` must be `TrackLoadData::Playlist(_)`
+                    unsafe { unreachable_unchecked() }
                 };
 
                 Self {
@@ -163,6 +175,10 @@ trait AutocompleteResultPrettify {
     fn prettify(&mut self) -> String;
 }
 
+trait UnsafeAutocompleteResultPrettify {
+    unsafe fn prettify(&mut self) -> String;
+}
+
 impl AutocompleteResultPrettify for TrackData {
     fn prettify(&mut self) -> String {
         let track_info = &mut self.info;
@@ -181,10 +197,12 @@ impl AutocompleteResultPrettify for TrackData {
     }
 }
 
-impl AutocompleteResultPrettify for LoadedTracks {
-    fn prettify(&mut self) -> String {
+impl UnsafeAutocompleteResultPrettify for LoadedTracks {
+    unsafe fn prettify(&mut self) -> String {
         let Some(TrackLoadData::Playlist(ref mut data)) = self.data else {
-            unreachable!()
+            // SAFETY: `loaded.load_type` is `Search`,
+            //         so `loaded.data` must be `TrackLoadData::Search(_)`
+            unsafe { unreachable_unchecked() }
         };
 
         let name = data.info.take_and_correct_name();
@@ -203,26 +221,30 @@ impl AutocompleteResultPrettify for LoadedTracks {
 }
 
 impl BotAutocomplete for Autocomplete {
-    async fn execute(self, mut ctx: AutocompleteCtx) -> AutocompleteResult {
-        let query = [
-            self.query,
-            self.query_2,
-            self.query_3,
-            self.query_4,
-            self.query_5,
-        ]
-        .into_iter()
-        .find_map(|q| match q {
-            AutocompleteValue::Focused(q) => Some(q),
-            _ => None,
-        })
-        .map(|q| {
-            let source = self.source.unwrap_or_default();
-            (!regex::URL.is_match(&q))
-                .then(|| format!("{}{}", source.value(), q).into_boxed_str())
-                .unwrap_or_else(|| q.into_boxed_str())
-        })
-        .expect("exactly one option is focused");
+    async fn execute(self, ctx: AutocompleteCtx) -> AutocompleteResult {
+        let mut ctx = require::guild(ctx)?;
+        // SAFETY: exactly one autocomplete option is focused, so finding will always be successful
+        let query = unsafe {
+            [
+                self.query,
+                self.query_2,
+                self.query_3,
+                self.query_4,
+                self.query_5,
+            ]
+            .into_iter()
+            .find_map(|q| match q {
+                AutocompleteValue::Focused(q) => Some(q),
+                _ => None,
+            })
+            .map(|q| {
+                let source = self.source.unwrap_or_default();
+                (!regex::url().is_match(&q))
+                    .then(|| format!("{}{}", source.value(), q).into_boxed_str())
+                    .unwrap_or_else(|| q.into_boxed_str())
+            })
+            .unwrap_unchecked()
+        };
 
         let guild_id = ctx.guild_id();
         let load_ctx = LoadTrackContext {
@@ -234,7 +256,9 @@ impl BotAutocomplete for Autocomplete {
         let choices = match loaded.load_type {
             TrackLoadType::Search => {
                 let Some(TrackLoadData::Search(tracks)) = loaded.data else {
-                    unreachable!()
+                    // SAFETY: `loaded.load_type` is `Search`,
+                    //         so `loaded.data` must be `TrackLoadData::Search(_)`
+                    unsafe { unreachable_unchecked() }
                 };
 
                 tracks
@@ -242,29 +266,28 @@ impl BotAutocomplete for Autocomplete {
                     .map(|mut t| CommandOptionChoice {
                         name: t.prettify(),
                         name_localizations: None,
-                        value: CommandOptionChoiceValue::String(
-                            t.info.uri.expect("track is nonlocal"),
-                        ),
+                        value: CommandOptionChoiceValue::String(t.info.into_uri_unwrapped()),
                     })
                     .take(COMMAND_CHOICES_LIMIT)
                     .collect()
             }
             TrackLoadType::Track => {
                 let Some(TrackLoadData::Track(mut track)) = loaded.data else {
-                    unreachable!()
+                    // SAFETY: `loaded.load_type` is `Track`,
+                    //         so `loaded.data` must be `TrackLoadData::Track(_)`
+                    unsafe { unreachable_unchecked() }
                 };
 
                 vec![CommandOptionChoice {
                     name: track.prettify(),
                     name_localizations: None,
-                    value: CommandOptionChoiceValue::String(
-                        track.info.uri.expect("track is nonlocal"),
-                    ),
+                    value: CommandOptionChoiceValue::String(track.info.into_uri_unwrapped()),
                 }]
             }
             TrackLoadType::Playlist => {
                 let mut choices = vec![CommandOptionChoice {
-                    name: loaded.prettify(),
+                    // SAFETY: `loaded.load_type` is `Playlist`, so this is safe
+                    name: unsafe { loaded.prettify() },
                     name_localizations: None,
                     value: CommandOptionChoiceValue::String(
                         query.grapheme_truncate(100).to_string(),
@@ -285,9 +308,7 @@ impl BotAutocomplete for Autocomplete {
                     choices.push(CommandOptionChoice {
                         name: track.prettify(),
                         name_localizations: None,
-                        value: CommandOptionChoiceValue::String(
-                            track.info.uri.expect("track is nonlocal"),
-                        ),
+                        value: CommandOptionChoiceValue::String(track.info.into_uri_unwrapped()),
                     });
                 }
 
@@ -302,11 +323,9 @@ impl BotAutocomplete for Autocomplete {
 }
 
 async fn play(
-    ctx: &mut Ctx<impl RespondViaMessage>,
+    ctx: &mut GuildCtx<impl RespondViaMessage>,
     queries: impl IntoIterator<Item = Box<str>> + Send,
 ) -> Result<(), play::Error> {
-    let guild_id = ctx.guild_id();
-
     let load_ctx = LoadTrackContext::new_via(ctx);
     match load_ctx.process_many(queries).await {
         Ok(results) => {
@@ -321,7 +340,7 @@ async fn play(
                         format!(
                             "[`{}`](<{}>)",
                             t.info.corrected_title(),
-                            t.info.uri.as_ref().expect("track is nonlocal")
+                            t.info.uri_unwrapped()
                         )
                     })
                     .collect::<Vec<_>>()
@@ -357,7 +376,9 @@ async fn play(
                 .collect::<Vec<_>>()
                 .pretty_join_with_and();
             let plus = match tracks_len + playlists_len {
-                0 => unreachable!(),
+                // SAFETY: at least one tracks or playlists must be loaded,
+                //         so this should never happen
+                0 => unsafe { std::hint::unreachable_unchecked() },
                 1 => "**`＋`**",
                 _ => "**`≡+`**",
             };
@@ -365,18 +386,19 @@ async fn play(
             util::auto_join_or_check_in_voice_with_user_and_check_not_suppressed(ctx).await?;
 
             let total_tracks = Vec::from(results);
-            let first_track = total_tracks.first().expect("results is non-empty").clone();
+            // SAFETY: at least one tracks must be loaded, so this unwrap is safe
+            let first_track = unsafe { total_tracks.first().cloned().unwrap_unchecked() };
 
-            util::auto_new_player_data(ctx).await?;
+            let player = util::auto_new_player(ctx).await?;
 
-            ctx.lavalink()
-                .player_data(guild_id)
+            player
+                .data_unwrapped()
                 .write()
                 .await
                 .queue_mut()
                 .enqueue(total_tracks, ctx.author_id());
 
-            ctx.lavalink().player(guild_id).play(&first_track).await?;
+            player.play(&first_track).await?;
 
             out_or_fol!(format!("{} Added {}", plus, enqueued_text), ctx);
         }
@@ -445,7 +467,8 @@ pub struct Play {
 }
 
 impl BotSlashCommand for Play {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         let queries = [
             Some(self.query),
             self.query_2,
@@ -478,7 +501,8 @@ pub struct File {
 }
 
 impl BotSlashCommand for File {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         let files = [
             Some(self.track),
             self.track_2,
@@ -527,12 +551,13 @@ pub struct AddToQueue;
 
 impl AddToQueue {
     pub fn create_command() -> Command {
-        CommandBuilder::new("➕ Add to queue", "", CommandType::Message).build()
+        CommandBuilder::new("➕ Add to queue", String::new(), CommandType::Message).build()
     }
 }
 
 impl BotMessageCommand for AddToQueue {
-    async fn run(mut ctx: MessageCtx) -> CommandResult {
+    async fn run(ctx: MessageCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         let message = ctx.target_message();
 
         let queries = extract_queries(message);
diff --git a/lyra/src/bot/component/queue/remove.rs b/lyra/src/bot/component/queue/remove.rs
index c714720..5c62e88 100644
--- a/lyra/src/bot/component/queue/remove.rs
+++ b/lyra/src/bot/component/queue/remove.rs
@@ -11,20 +11,22 @@ use crate::bot::{
     command::{
         check,
         model::{BotAutocomplete, BotSlashCommand},
-        AutocompleteCtx, SlashCtx,
+        require, AutocompleteCtx, SlashCtx,
     },
+    core::model::CacheAware,
     error::{command::AutocompleteResult, CommandResult},
-    lavalink::{ExpectedPlayerDataAware, PlayerDataAware},
+    lavalink::PlayerAware,
 };
 
 async fn generate_remove_choices(
     focused: &str,
     finished: Vec<i64>,
-    ctx: &AutocompleteCtx,
+    ctx: &(impl CacheAware + PlayerAware + Sync),
 ) -> Vec<CommandOptionChoice> {
-    let Some(data) = ctx.get_player_data() else {
+    let Ok(player) = require::player(ctx) else {
         return Vec::new();
     };
+    let data = player.data();
     let data_r = data.read().await;
     let (queue, Some(queue_len)) = (data_r.queue(), NonZeroUsize::new(data_r.queue().len())) else {
         return Vec::new();
@@ -68,7 +70,8 @@ pub struct Autocomplete {
 }
 
 impl BotAutocomplete for Autocomplete {
-    async fn execute(self, mut ctx: AutocompleteCtx) -> AutocompleteResult {
+    async fn execute(self, ctx: AutocompleteCtx) -> AutocompleteResult {
+        let mut ctx = require::guild(ctx)?;
         let tracks = [
             self.track,
             self.track_2,
@@ -85,13 +88,16 @@ impl BotAutocomplete for Autocomplete {
             })
             .copied()
             .collect::<Vec<_>>();
-        let focused = tracks
-            .into_iter()
-            .find_map(|a| match a {
-                AutocompleteValue::Focused(i) => Some(i),
-                _ => None,
-            })
-            .expect("exactly one option is focused");
+        // SAFETY: exactly one autocomplete option is focused, so finding will always be successful
+        let focused = unsafe {
+            tracks
+                .into_iter()
+                .find_map(|a| match a {
+                    AutocompleteValue::Focused(i) => Some(i),
+                    _ => None,
+                })
+                .unwrap_unchecked()
+        };
 
         let choices = generate_remove_choices(&focused, finished, &ctx).await;
         Ok(ctx.autocomplete(choices).await?)
@@ -120,12 +126,13 @@ pub struct Remove {
 }
 
 impl BotSlashCommand for Remove {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        let in_voice_with_user = check::in_voice(&ctx)?.with_user()?;
-        check::queue_not_empty(&ctx).await?;
-        check::not_suppressed(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let in_voice_with_user =
+            check::in_voice_with_user(require::in_voice(&ctx)?.and_unsuppressed()?)?;
+        let player = require::player(&ctx)?.and_queue_not_empty().await?;
 
-        let data = ctx.player_data();
+        let data = player.data();
         let data_r = data.read().await;
         let queue = data_r.queue();
         let queue_len = queue.len();
@@ -154,6 +161,6 @@ impl BotSlashCommand for Remove {
         positions.sort_unstable();
 
         drop(data_r);
-        Ok(super::remove(positions.into(), &mut ctx).await?)
+        Ok(super::remove(positions.into(), &mut ctx, &player).await?)
     }
 }
diff --git a/lyra/src/bot/component/queue/remove_range.rs b/lyra/src/bot/component/queue/remove_range.rs
index c75348a..0cbf118 100644
--- a/lyra/src/bot/component/queue/remove_range.rs
+++ b/lyra/src/bot/component/queue/remove_range.rs
@@ -11,12 +11,12 @@ use crate::bot::{
         check,
         macros::{bad, sus},
         model::{BotAutocomplete, BotSlashCommand},
-        AutocompleteCtx, SlashCtx,
+        require, AutocompleteCtx, SlashCtx,
     },
     component::queue::Remove,
-    core::model::InteractionClient,
+    core::model::{CacheAware, InteractionClient},
     error::{command::AutocompleteResult, CommandResult},
-    lavalink::{ExpectedPlayerDataAware, PlayerDataAware},
+    lavalink::PlayerAware,
 };
 
 enum RemoveRangeAutocompleteOptionsType {
@@ -33,11 +33,12 @@ struct RemoveRangeAutocompleteOptions {
 
 async fn generate_remove_range_autocomplete_choices(
     options: &RemoveRangeAutocompleteOptions,
-    ctx: &AutocompleteCtx,
+    ctx: &(impl CacheAware + PlayerAware + Sync),
 ) -> Vec<CommandOptionChoice> {
-    let Some(data) = ctx.get_player_data() else {
+    let Ok(player) = require::player(ctx) else {
         return Vec::new();
     };
+    let data = player.data();
     let data_r = data.read().await;
     let (queue, Some(queue_len)) = (data_r.queue(), NonZeroUsize::new(data_r.queue().len())) else {
         return Vec::new();
@@ -108,7 +109,8 @@ pub struct Autocomplete {
 }
 
 impl BotAutocomplete for Autocomplete {
-    async fn execute(self, mut ctx: AutocompleteCtx) -> AutocompleteResult {
+    async fn execute(self, ctx: AutocompleteCtx) -> AutocompleteResult {
+        let mut ctx = require::guild(ctx)?;
         let (focused, kind) = match (self.start, self.end) {
             (AutocompleteValue::Focused(focused), AutocompleteValue::None) => {
                 (focused, RemoveRangeAutocompleteOptionsType::StartFocused)
@@ -124,7 +126,9 @@ impl BotAutocomplete for Autocomplete {
                 focused,
                 RemoveRangeAutocompleteOptionsType::EndFocusedStartCompleted(i),
             ),
-            _ => unreachable!(),
+            // SAFETY: only one autocomplete options can be focused at a time,
+            //         so this branch is unreachable
+            _ => unsafe { std::hint::unreachable_unchecked() },
         };
 
         let options = RemoveRangeAutocompleteOptions {
@@ -149,12 +153,13 @@ pub struct RemoveRange {
 }
 
 impl BotSlashCommand for RemoveRange {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        let in_voice_with_user = check::in_voice(&ctx)?.with_user()?;
-        check::queue_not_empty(&ctx).await?;
-        check::not_suppressed(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let in_voice_with_user =
+            check::in_voice_with_user(require::in_voice(&ctx)?.and_unsuppressed()?)?;
+        let player = require::player(&ctx)?.and_queue_not_empty().await?;
 
-        let data = ctx.player_data();
+        let data = player.data();
         let data_r = data.read().await;
         let queue = data_r.queue();
         let queue_len = queue.len();
@@ -162,7 +167,6 @@ impl BotSlashCommand for RemoveRange {
         if queue_len == 1 {
             let remove = InteractionClient::mention_command::<Remove>();
 
-            drop(in_voice_with_user);
             sus!(
                 format!("The queue only has one track; Use {remove} instead."),
                 ctx
@@ -187,7 +191,6 @@ impl BotSlashCommand for RemoveRange {
                 )
             };
 
-            drop(in_voice_with_user);
             bad!(message, ctx);
         }
 
@@ -195,6 +198,6 @@ impl BotSlashCommand for RemoveRange {
         check::all_users_track(positions, in_voice_with_user, queue, &ctx)?;
 
         drop(data_r);
-        Ok(super::remove_range(self.start, self.end, &mut ctx).await?)
+        Ok(super::remove_range(self.start, self.end, &mut ctx, &player).await?)
     }
 }
diff --git a/lyra/src/bot/component/queue/repeat.rs b/lyra/src/bot/component/queue/repeat.rs
index 47befee..9ae3274 100644
--- a/lyra/src/bot/component/queue/repeat.rs
+++ b/lyra/src/bot/component/queue/repeat.rs
@@ -2,10 +2,15 @@ use twilight_interactions::command::{CommandModel, CommandOption, CreateCommand,
 
 use crate::bot::{
     command::{
-        check::CheckerBuilder, macros::out_or_upd, model::BotSlashCommand, poll::Topic, SlashCtx,
+        check,
+        macros::out_or_upd,
+        model::BotSlashCommand,
+        poll::Topic,
+        require::{self, CachelessInVoice},
+        SlashCtx,
     },
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
+    gateway::GuildIdAware,
     lavalink::{self, DelegateMethods, LavalinkAware},
 };
 
@@ -38,7 +43,8 @@ pub struct Repeat {
 }
 
 impl BotSlashCommand for Repeat {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
         let guild_id = ctx.guild_id();
         let mode = {
             if let Some(mode) = self.mode {
@@ -52,17 +58,19 @@ impl BotSlashCommand for Repeat {
             }
         };
 
-        CheckerBuilder::new()
-            .in_voice_with_user_only_with_poll(Topic::Repeat(mode))
-            .queue_not_empty()
-            .build()
-            .run(&mut ctx)
+        let in_voice = require::in_voice(&ctx)?;
+        let in_voice_cacheless = CachelessInVoice::from(&in_voice);
+        let player = require::player(&ctx)?.and_queue_not_empty().await?;
+        check::in_voice_with_user(in_voice)?
+            .only_else_poll(Topic::Repeat(mode))?
+            .start(&mut ctx)
             .await?;
 
-        let lavalink = ctx.lavalink();
-        lavalink.dispatch(guild_id, lavalink::Event::QueueRepeat);
-        lavalink
-            .player_data(guild_id)
+        ctx.lavalink()
+            .connection_from(&in_voice_cacheless)
+            .dispatch(lavalink::Event::QueueRepeat);
+        player
+            .data()
             .write()
             .await
             .queue_mut()
diff --git a/lyra/src/bot/component/queue/shuffle.rs b/lyra/src/bot/component/queue/shuffle.rs
index a051230..384542b 100644
--- a/lyra/src/bot/component/queue/shuffle.rs
+++ b/lyra/src/bot/component/queue/shuffle.rs
@@ -2,14 +2,13 @@ use twilight_interactions::command::{CommandModel, CreateCommand};
 
 use crate::bot::{
     command::{
-        check::CheckerBuilder,
+        check,
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
-    lavalink::{DelegateMethods, IndexerType, LavalinkAware},
+    lavalink::IndexerType,
 };
 
 /// Toggles queue shuffling
@@ -18,16 +17,12 @@ use crate::bot::{
 pub struct Shuffle;
 
 impl BotSlashCommand for Shuffle {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        CheckerBuilder::new()
-            .in_voice_with_user_only()
-            .queue_not_empty()
-            .build()
-            .run(&mut ctx)
-            .await?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        check::in_voice_with_user(require::in_voice(&ctx)?)?.only()?;
+        let player = require::player(&ctx)?.and_queue_not_empty().await?;
 
-        let guild_id = ctx.guild_id();
-        let data = ctx.lavalink().player_data(guild_id);
+        let data = player.data();
         let data_r = data.read().await;
         let indexer_type = data_r.queue().indexer_type();
 
diff --git a/lyra/src/bot/component/tuning.rs b/lyra/src/bot/component/tuning.rs
index f21d500..d1ac255 100644
--- a/lyra/src/bot/component/tuning.rs
+++ b/lyra/src/bot/component/tuning.rs
@@ -14,54 +14,62 @@ pub use volume::Volume;
 use crate::bot::{
     command::{
         check,
-        model::{Ctx, CtxKind},
+        model::{CtxKind, GuildCtx},
+        require::{self, InVoice, Player},
     },
     core::model::{BotStateAware, HttpAware},
-    error::CommandResult,
-    gateway::{voice, ExpectedGuildIdAware},
-    lavalink::{DelegateMethods, ExpectedPlayerAware, LavalinkAware},
+    error::CommandError,
+    gateway::{voice, GuildIdAware},
+    lavalink::{DelegateMethods, LavalinkAware},
 };
 
 #[inline]
-fn common_checks(ctx: &Ctx<impl CtxKind>) -> CommandResult {
+fn check_user_is_dj_and_require_unsuppressed_player(
+    ctx: &GuildCtx<impl CtxKind>,
+) -> Result<(InVoice, Player), CommandError> {
     check::user_is_dj(ctx)?;
-    check::in_voice(ctx)?;
-    check::not_suppressed(ctx)?;
-    check::player_exist(ctx)?;
+    let in_voice = require::in_voice(ctx)?.and_unsuppressed()?;
+    let player = require::player(ctx)?;
 
-    Ok(())
+    Ok((in_voice, player))
 }
 
 #[inline]
-fn unmuting_checks(ctx: &Ctx<impl CtxKind>) -> CommandResult {
+fn unmuting_checks(ctx: &GuildCtx<impl CtxKind>) -> Result<InVoice, CommandError> {
     check::user_is_dj(ctx)?;
-    check::in_voice(ctx)?;
+    let in_voice = require::in_voice(ctx)?;
 
-    Ok(())
+    Ok(in_voice)
 }
 
 #[inline]
-fn unmuting_player_checks(ctx: &Ctx<impl CtxKind>) -> CommandResult {
+fn check_user_is_dj_and_require_player(
+    ctx: &GuildCtx<impl CtxKind>,
+) -> Result<(InVoice, Player), CommandError> {
     check::user_is_dj(ctx)?;
-    check::in_voice(ctx)?;
-    check::player_exist(ctx)?;
+    let in_voice = require::in_voice(ctx)?;
+    let player = require::player(ctx)?;
 
-    Ok(())
+    Ok((in_voice, player))
+}
+
+trait ApplyFilter {
+    fn apply_to(self, filter: Filters) -> Filters;
 }
 
 trait UpdateFilter {
-    fn apply(self, filter: Filters) -> Filters;
+    async fn update_filter(&self, update: impl ApplyFilter + Send + Sync) -> LavalinkResult<()>;
 }
 
-async fn set_filter(
-    ctx: &(impl ExpectedPlayerAware + Sync),
-    update: impl UpdateFilter + Send + Sync,
-) -> LavalinkResult<()> {
-    let player = ctx.player();
-    let old_filter = player.get_player().await?.filters.unwrap_or_default();
+impl UpdateFilter for Player {
+    async fn update_filter(&self, update: impl ApplyFilter + Send + Sync) -> LavalinkResult<()> {
+        let old_filter = self.info().await?.filters.unwrap_or_default();
 
-    player.set_filters(update.apply(old_filter)).await?;
-    Ok(())
+        self.context
+            .set_filters(update.apply_to(old_filter))
+            .await?;
+        Ok(())
+    }
 }
 
 #[tracing::instrument(skip_all, name = "voice_state_update")]
@@ -82,7 +90,8 @@ pub async fn handle_voice_state_update(ctx: &voice::Context) -> Result<(), twili
         } else if let Some(d) = lavalink.get_player_data(guild_id) {
             Some(d.read().await.volume())
         } else {
-            Some(NonZeroU16::new(100).expect("volume is non-zero"))
+            // SAFETY: `100` is non-zero
+            Some(unsafe { NonZeroU16::new_unchecked(100) })
         });
         let describe = if state_mute { "muted" } else { "unmuted" };
 
diff --git a/lyra/src/bot/component/tuning/equaliser.rs b/lyra/src/bot/component/tuning/equaliser.rs
index 618a7ab..5a0f4a4 100644
--- a/lyra/src/bot/component/tuning/equaliser.rs
+++ b/lyra/src/bot/component/tuning/equaliser.rs
@@ -27,8 +27,8 @@ impl SetEqualiser {
     }
 }
 
-impl super::UpdateFilter for Option<SetEqualiser> {
-    fn apply(self, filter: Filters) -> Filters {
+impl super::ApplyFilter for Option<SetEqualiser> {
+    fn apply_to(self, filter: Filters) -> Filters {
         Filters {
             equalizer: self.map(|f| f.0.into()),
             ..filter
diff --git a/lyra/src/bot/component/tuning/equaliser/custom.rs b/lyra/src/bot/component/tuning/equaliser/custom.rs
index 1a6a59e..a6eddf6 100644
--- a/lyra/src/bot/component/tuning/equaliser/custom.rs
+++ b/lyra/src/bot/component/tuning/equaliser/custom.rs
@@ -1,8 +1,13 @@
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
 use crate::bot::{
-    command::macros::{bad, out},
-    component::tuning::{common_checks, equaliser::SetEqualiser, set_filter},
+    command::{
+        macros::{bad, out},
+        require,
+    },
+    component::tuning::{
+        check_user_is_dj_and_require_unsuppressed_player, equaliser::SetEqualiser, UpdateFilter,
+    },
 };
 
 /// Enable the player equaliser with custom settings.
@@ -58,8 +63,9 @@ pub struct Custom {
 }
 
 impl crate::bot::command::model::BotSlashCommand for Custom {
-    async fn run(self, mut ctx: crate::bot::command::SlashCtx) -> crate::bot::error::CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: crate::bot::command::SlashCtx) -> crate::bot::error::CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
         let equaliser = [
             self.band_1,
@@ -89,7 +95,7 @@ impl crate::bot::command::model::BotSlashCommand for Custom {
             );
         };
 
-        set_filter(&ctx, Some(filter)).await?;
+        player.update_filter(Some(filter)).await?;
         out!("🎛️🟢 Enabled player equaliser (**`Custom Settings`**)", ctx);
     }
 }
diff --git a/lyra/src/bot/component/tuning/equaliser/off.rs b/lyra/src/bot/component/tuning/equaliser/off.rs
index d2cef84..52e797b 100644
--- a/lyra/src/bot/component/tuning/equaliser/off.rs
+++ b/lyra/src/bot/component/tuning/equaliser/off.rs
@@ -1,8 +1,8 @@
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
 use crate::bot::{
-    command::macros::out,
-    component::tuning::{common_checks, set_filter},
+    command::{macros::out, require},
+    component::tuning::{check_user_is_dj_and_require_unsuppressed_player, UpdateFilter},
 };
 
 /// Disable the player equaliser
@@ -11,10 +11,11 @@ use crate::bot::{
 pub struct Off;
 
 impl crate::bot::command::model::BotSlashCommand for Off {
-    async fn run(self, mut ctx: crate::bot::command::SlashCtx) -> crate::bot::error::CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: crate::bot::command::SlashCtx) -> crate::bot::error::CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        set_filter(&ctx, None::<super::SetEqualiser>).await?;
+        player.update_filter(None::<super::SetEqualiser>).await?;
         out!("🎛️🔴 Disabled equaliser", ctx);
     }
 }
diff --git a/lyra/src/bot/component/tuning/equaliser/preset.rs b/lyra/src/bot/component/tuning/equaliser/preset.rs
index 4301ad9..bec0d8f 100644
--- a/lyra/src/bot/component/tuning/equaliser/preset.rs
+++ b/lyra/src/bot/component/tuning/equaliser/preset.rs
@@ -1,6 +1,11 @@
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
-use crate::bot::{command::macros::out, component::tuning::equaliser::SetEqualiser};
+use crate::bot::{
+    command::{macros::out, require},
+    component::tuning::{
+        check_user_is_dj_and_require_unsuppressed_player, equaliser::SetEqualiser, UpdateFilter,
+    },
+};
 
 lyra_proc::read_equaliser_presets_as!(EqualiserPreset);
 
@@ -25,13 +30,14 @@ pub struct Preset {
 }
 
 impl crate::bot::command::model::BotSlashCommand for Preset {
-    async fn run(self, mut ctx: crate::bot::command::SlashCtx) -> crate::bot::error::CommandResult {
-        super::super::common_checks(&ctx)?;
+    async fn run(self, ctx: crate::bot::command::SlashCtx) -> crate::bot::error::CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
         let preset_name = self.preset.value();
         let update = Some(SetEqualiser::from(self.preset));
 
-        super::super::set_filter(&ctx, update).await?;
+        player.update_filter(update).await?;
         out!(
             format!(
                 "🎛️🟢 Enabled player equaliser (Preset: **`{}`**)",
diff --git a/lyra/src/bot/component/tuning/filter.rs b/lyra/src/bot/component/tuning/filter.rs
index 6e5b30d..fb400b8 100644
--- a/lyra/src/bot/component/tuning/filter.rs
+++ b/lyra/src/bot/component/tuning/filter.rs
@@ -13,7 +13,7 @@ use lavalink_rs::model::player::{Filters, TremoloVibrato};
 use lyra_proc::BotCommandGroup;
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
-use super::UpdateFilter;
+use super::ApplyFilter;
 
 trait TremoloVibratoMarker {}
 struct TremoloMarker;
@@ -75,25 +75,22 @@ enum TremoloVibratoSettings {
 
 impl std::fmt::Display for TremoloVibratoSettings {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        let settings = match self {
-            Self::Default => String::from("**`Default Settings`**"),
-            Self::Depth(d) => format!("Depth: `{d}`"),
-            Self::Frequency(f) => format!("Frequency: `{f} Hz.`"),
-            Self::Custom {
-                frequency: f,
-                depth: d,
-            } => format!("Frequency: `{f} Hz.`, Depth: `{d}`"),
-        };
-
-        write!(f, "{settings}")
+        match self {
+            Self::Default => f.write_str("**`Default Settings`**"),
+            Self::Depth(d) => write!(f, "Depth: `{d}`"),
+            Self::Frequency(frequency) => write!(f, "Frequency: `{frequency} Hz.`"),
+            Self::Custom { frequency, depth } => {
+                write!(f, "Frequency: `{frequency} Hz.`, Depth: `{depth}`")
+            }
+        }
     }
 }
 
 type SetTremolo = SetTremoloVibrato<TremoloMarker>;
 type SetVibrato = SetTremoloVibrato<VibratoMarker>;
 
-impl UpdateFilter for Option<SetTremoloVibrato<TremoloMarker>> {
-    fn apply(self, filter: Filters) -> Filters {
+impl ApplyFilter for Option<SetTremoloVibrato<TremoloMarker>> {
+    fn apply_to(self, filter: Filters) -> Filters {
         Filters {
             tremolo: self.map(|f| f.inner),
             ..filter
@@ -101,8 +98,8 @@ impl UpdateFilter for Option<SetTremoloVibrato<TremoloMarker>> {
     }
 }
 
-impl UpdateFilter for Option<SetTremoloVibrato<VibratoMarker>> {
-    fn apply(self, filter: Filters) -> Filters {
+impl ApplyFilter for Option<SetTremoloVibrato<VibratoMarker>> {
+    fn apply_to(self, filter: Filters) -> Filters {
         Filters {
             vibrato: self.map(|f| f.inner),
             ..filter
diff --git a/lyra/src/bot/component/tuning/filter/all_off.rs b/lyra/src/bot/component/tuning/filter/all_off.rs
index 0225b03..feda6cd 100644
--- a/lyra/src/bot/component/tuning/filter/all_off.rs
+++ b/lyra/src/bot/component/tuning/filter/all_off.rs
@@ -1,7 +1,10 @@
 use lavalink_rs::model::player::{Filters, Timescale};
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
-use crate::bot::{command::macros::out, lavalink::ExpectedPlayerDataAware};
+use crate::bot::{
+    command::{macros::out, require},
+    component::tuning::UpdateFilter,
+};
 
 struct ResetAllExceptSpeed;
 
@@ -14,8 +17,8 @@ impl ResetAllExceptSpeed {
     }
 }
 
-impl super::UpdateFilter for ResetAllExceptSpeed {
-    fn apply(self, filter: Filters) -> Filters {
+impl super::ApplyFilter for ResetAllExceptSpeed {
+    fn apply_to(self, filter: Filters) -> Filters {
         let timescale = Some(Self::into_timescale_via(
             &filter.timescale.unwrap_or_default(),
         ));
@@ -33,14 +36,12 @@ impl super::UpdateFilter for ResetAllExceptSpeed {
 pub struct AllOff;
 
 impl crate::bot::command::model::BotSlashCommand for AllOff {
-    async fn run(
-        self,
-        mut ctx: crate::bot::command::SlashCtx,
-    ) -> crate::bot::error::command::Result {
-        super::super::common_checks(&ctx)?;
-
-        super::super::set_filter(&ctx, ResetAllExceptSpeed).await?;
-        ctx.player_data().write().await.pitch_mut().reset();
+    async fn run(self, ctx: crate::bot::command::SlashCtx) -> crate::bot::error::command::Result {
+        let mut ctx = require::guild(ctx)?;
+        let player = require::player(&ctx)?;
+
+        player.update_filter(ResetAllExceptSpeed).await?;
+        player.data().write().await.pitch_mut().reset();
 
         out!("🪄🔴 Disabled all filters", ctx);
     }
diff --git a/lyra/src/bot/component/tuning/filter/channel_mix.rs b/lyra/src/bot/component/tuning/filter/channel_mix.rs
index 67cdad1..6a7b728 100644
--- a/lyra/src/bot/component/tuning/filter/channel_mix.rs
+++ b/lyra/src/bot/component/tuning/filter/channel_mix.rs
@@ -6,9 +6,9 @@ use crate::bot::{
     command::{
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
-    component::tuning::{common_checks, set_filter},
+    component::tuning::{check_user_is_dj_and_require_unsuppressed_player, UpdateFilter},
     error::CommandResult,
 };
 
@@ -46,8 +46,8 @@ impl SetChannelMix {
     }
 }
 
-impl crate::bot::component::tuning::UpdateFilter for Option<SetChannelMix> {
-    fn apply(self, filter: Filters) -> Filters {
+impl crate::bot::component::tuning::ApplyFilter for Option<SetChannelMix> {
+    fn apply_to(self, filter: Filters) -> Filters {
         Filters {
             channel_mix: self.map(|c| c.0),
             ..filter
@@ -83,8 +83,9 @@ pub struct On {
 }
 
 impl BotSlashCommand for On {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
         let Some(update) = SetChannelMix::new(
             self.left_to_left,
@@ -102,7 +103,7 @@ impl BotSlashCommand for On {
             );
         };
 
-        set_filter(&ctx, Some(update)).await?;
+        player.update_filter(Some(update)).await?;
         out!("⚗️🟢 Enabled channel mix)", ctx);
     }
 }
@@ -113,10 +114,11 @@ impl BotSlashCommand for On {
 pub struct Off;
 
 impl BotSlashCommand for Off {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        set_filter(&ctx, None::<SetChannelMix>).await?;
+        player.update_filter(None::<SetChannelMix>).await?;
         out!("⚗️🔴 Disabled channel mix", ctx);
     }
 }
diff --git a/lyra/src/bot/component/tuning/filter/distortion.rs b/lyra/src/bot/component/tuning/filter/distortion.rs
index 30c786f..f2870d6 100644
--- a/lyra/src/bot/component/tuning/filter/distortion.rs
+++ b/lyra/src/bot/component/tuning/filter/distortion.rs
@@ -6,9 +6,9 @@ use crate::bot::{
     command::{
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
-    component::tuning::{common_checks, set_filter},
+    component::tuning::{check_user_is_dj_and_require_unsuppressed_player, UpdateFilter},
     error::CommandResult,
 };
 
@@ -43,8 +43,8 @@ impl SetDistortion {
     }
 }
 
-impl crate::bot::component::tuning::UpdateFilter for Option<SetDistortion> {
-    fn apply(self, filter: Filters) -> Filters {
+impl crate::bot::component::tuning::ApplyFilter for Option<SetDistortion> {
+    fn apply_to(self, filter: Filters) -> Filters {
         Filters {
             distortion: self.map(|d| d.0),
             ..filter
@@ -84,8 +84,9 @@ pub struct On {
 }
 
 impl BotSlashCommand for On {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
         let distortion = LavalinkDistortion {
             sin_offset: self.sin_offset,
@@ -108,7 +109,7 @@ impl BotSlashCommand for On {
             );
         };
 
-        set_filter(&ctx, Some(update)).await?;
+        player.update_filter(Some(update)).await?;
         out!(format!("🍭🟢 Enabled distortion"), ctx);
     }
 }
@@ -119,10 +120,11 @@ impl BotSlashCommand for On {
 pub struct Off;
 
 impl BotSlashCommand for Off {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        set_filter(&ctx, None::<SetDistortion>).await?;
+        player.update_filter(None::<SetDistortion>).await?;
         out!("🍭🔴 Disabled distortion", ctx);
     }
 }
diff --git a/lyra/src/bot/component/tuning/filter/low_pass.rs b/lyra/src/bot/component/tuning/filter/low_pass.rs
index 7d07aca..3519de7 100644
--- a/lyra/src/bot/component/tuning/filter/low_pass.rs
+++ b/lyra/src/bot/component/tuning/filter/low_pass.rs
@@ -6,9 +6,9 @@ use crate::bot::{
     command::{
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
-    component::tuning::{common_checks, set_filter},
+    component::tuning::{check_user_is_dj_and_require_unsuppressed_player, UpdateFilter},
     error::CommandResult,
 };
 
@@ -41,17 +41,15 @@ enum LowPassSettings {
 
 impl std::fmt::Display for LowPassSettings {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        let settings = match self {
-            Self::Default => String::from("**`Default Settings`**"),
-            Self::Custom(s) => format!("Smoothing: `{s:.1}`"),
-        };
-
-        write!(f, "{settings}")
+        match self {
+            Self::Default => f.write_str("**`Default Settings`**"),
+            Self::Custom(s) => write!(f, "Smoothing: `{s:.1}`"),
+        }
     }
 }
 
-impl crate::bot::component::tuning::UpdateFilter for Option<SetLowPass> {
-    fn apply(self, filter: Filters) -> Filters {
+impl crate::bot::component::tuning::ApplyFilter for Option<SetLowPass> {
+    fn apply_to(self, filter: Filters) -> Filters {
         Filters {
             low_pass: self.map(|l| l.0),
             ..filter
@@ -78,8 +76,9 @@ pub struct On {
 }
 
 impl BotSlashCommand for On {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
         let Some(update) = SetLowPass::new(self.smoothing) else {
             bad!(
@@ -89,7 +88,7 @@ impl BotSlashCommand for On {
         };
         let settings = update.settings();
 
-        set_filter(&ctx, Some(update)).await?;
+        player.update_filter(Some(update)).await?;
         out!(format!("😶‍🌫️🟢 Enabled low pass ({settings})"), ctx);
     }
 }
@@ -100,10 +99,11 @@ impl BotSlashCommand for On {
 pub struct Off;
 
 impl BotSlashCommand for Off {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        set_filter(&ctx, None::<SetLowPass>).await?;
+        player.update_filter(None::<SetLowPass>).await?;
         out!("😶‍🌫️🔴 Disabled low pass", ctx);
     }
 }
diff --git a/lyra/src/bot/component/tuning/filter/pitch.rs b/lyra/src/bot/component/tuning/filter/pitch.rs
index 52a48ac..439e336 100644
--- a/lyra/src/bot/component/tuning/filter/pitch.rs
+++ b/lyra/src/bot/component/tuning/filter/pitch.rs
@@ -11,10 +11,7 @@ use lavalink_rs::{
 use lyra_proc::BotCommandGroup;
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
-use crate::bot::{
-    gateway::ExpectedGuildIdAware,
-    lavalink::{DelegateMethods, LavalinkAware, Pitch as PitchModel},
-};
+use crate::bot::{command::require::Player, lavalink::Pitch as PitchModel};
 
 enum Tier {
     Default,
@@ -43,16 +40,13 @@ impl PitchModel {
 }
 
 async fn shift_pitch(
-    ctx: &(impl LavalinkAware + ExpectedGuildIdAware + Sync),
+    player: &Player,
     half_tones: NonZeroI64,
 ) -> LavalinkResult<(PitchModel, PitchModel)> {
-    let guild_id = ctx.guild_id();
-    let lavalink = ctx.lavalink();
-    let player = lavalink.player(guild_id);
-    let old_filter = player.get_player().await?.filters.unwrap_or_default();
+    let old_filter = player.info().await?.filters.unwrap_or_default();
 
-    let (old_pitch, new_pitch) = lavalink
-        .player_data(guild_id)
+    let (old_pitch, new_pitch) = player
+        .data()
         .write()
         .await
         .pitch_mut()
@@ -65,6 +59,7 @@ async fn shift_pitch(
     });
 
     player
+        .context
         .set_filters(Filters {
             timescale,
             ..old_filter
diff --git a/lyra/src/bot/component/tuning/filter/pitch/down.rs b/lyra/src/bot/component/tuning/filter/pitch/down.rs
index 4c3c7e8..30cc648 100644
--- a/lyra/src/bot/component/tuning/filter/pitch/down.rs
+++ b/lyra/src/bot/component/tuning/filter/pitch/down.rs
@@ -3,8 +3,10 @@ use std::num::NonZeroI64;
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
 use crate::bot::{
-    command::{macros::out, model::BotSlashCommand, SlashCtx},
-    component::tuning::{common_checks, filter::pitch::shift_pitch},
+    command::{macros::out, model::BotSlashCommand, require, SlashCtx},
+    component::tuning::{
+        check_user_is_dj_and_require_unsuppressed_player, filter::pitch::shift_pitch,
+    },
     error::CommandResult,
 };
 
@@ -18,12 +20,13 @@ pub struct Down {
 }
 
 impl BotSlashCommand for Down {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        let half_tones =
-            NonZeroI64::new(self.half_tones.unwrap_or(2)).expect("self.half_tones is non-zero");
-        let (old, new) = shift_pitch(&ctx, -half_tones).await?;
+        // SAFETY: `self.half_tones.unwrap_or(2)` is non-empty
+        let half_tones = unsafe { NonZeroI64::new_unchecked(self.half_tones.unwrap_or(2)) };
+        let (old, new) = shift_pitch(&player, -half_tones).await?;
 
         let emoji = new.tier().emoji();
         out!(format!("{emoji}**`ー`** ~~`{old}`~~ ➜ **`{new}`**"), ctx);
diff --git a/lyra/src/bot/component/tuning/filter/pitch/set.rs b/lyra/src/bot/component/tuning/filter/pitch/set.rs
index e0aab5b..4aaeb89 100644
--- a/lyra/src/bot/component/tuning/filter/pitch/set.rs
+++ b/lyra/src/bot/component/tuning/filter/pitch/set.rs
@@ -5,11 +5,12 @@ use crate::bot::{
     command::{
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
+    },
+    component::tuning::{
+        check_user_is_dj_and_require_unsuppressed_player, ApplyFilter, UpdateFilter,
     },
-    component::tuning::{common_checks, set_filter},
     error::CommandResult,
-    lavalink::ExpectedPlayerDataAware,
 };
 
 use super::Tier;
@@ -48,8 +49,8 @@ impl SetPitch {
     }
 }
 
-impl super::super::UpdateFilter for SetPitch {
-    fn apply(self, filter: Filters) -> Filters {
+impl ApplyFilter for SetPitch {
+    fn apply_to(self, filter: Filters) -> Filters {
         let timescale = Some(self.into_timescale_via(&filter.timescale.unwrap_or_default()));
 
         Filters {
@@ -69,8 +70,9 @@ pub struct Set {
 }
 
 impl BotSlashCommand for Set {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
         let Some(update) = SetPitch::new(self.multiplier) else {
             bad!("Multiplier must not be 0", ctx);
@@ -78,8 +80,8 @@ impl BotSlashCommand for Set {
 
         let multiplier = update.multiplier();
         let emoji = update.tier().emoji();
-        set_filter(&ctx, update).await?;
-        ctx.player_data().write().await.pitch_mut().set(multiplier);
+        player.update_filter(update).await?;
+        player.data().write().await.pitch_mut().set(multiplier);
 
         out!(
             format!("{emoji} Set the playback pitch to `{multiplier}`×."),
diff --git a/lyra/src/bot/component/tuning/filter/pitch/up.rs b/lyra/src/bot/component/tuning/filter/pitch/up.rs
index 372e151..0884e64 100644
--- a/lyra/src/bot/component/tuning/filter/pitch/up.rs
+++ b/lyra/src/bot/component/tuning/filter/pitch/up.rs
@@ -3,8 +3,10 @@ use std::num::NonZeroI64;
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
 use crate::bot::{
-    command::{macros::out, model::BotSlashCommand, SlashCtx},
-    component::tuning::{common_checks, filter::pitch::shift_pitch},
+    command::{macros::out, model::BotSlashCommand, require, SlashCtx},
+    component::tuning::{
+        check_user_is_dj_and_require_unsuppressed_player, filter::pitch::shift_pitch,
+    },
     error::CommandResult,
 };
 
@@ -18,12 +20,13 @@ pub struct Up {
 }
 
 impl BotSlashCommand for Up {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        let half_tones =
-            NonZeroI64::new(self.half_tones.unwrap_or(2)).expect("self.half_tones is non-zero");
-        let (old, new) = shift_pitch(&ctx, half_tones).await?;
+        // SAFETY: `self.half_tones.unwrap_or(2)` is non-zero
+        let half_tones = unsafe { NonZeroI64::new_unchecked(self.half_tones.unwrap_or(2)) };
+        let (old, new) = shift_pitch(&player, half_tones).await?;
 
         let emoji = new.tier().emoji();
         out!(format!("{emoji}**`＋`** ~~`{old}`~~ ➜ **`{new}`**"), ctx);
diff --git a/lyra/src/bot/component/tuning/filter/rotation.rs b/lyra/src/bot/component/tuning/filter/rotation.rs
index 7410ec2..6b933cc 100644
--- a/lyra/src/bot/component/tuning/filter/rotation.rs
+++ b/lyra/src/bot/component/tuning/filter/rotation.rs
@@ -6,9 +6,9 @@ use crate::bot::{
     command::{
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
-    component::tuning::{common_checks, set_filter},
+    component::tuning::{check_user_is_dj_and_require_unsuppressed_player, UpdateFilter},
     error::CommandResult,
 };
 
@@ -26,8 +26,8 @@ impl SetRotation {
     }
 }
 
-impl super::UpdateFilter for Option<SetRotation> {
-    fn apply(self, filter: Filters) -> Filters {
+impl super::ApplyFilter for Option<SetRotation> {
+    fn apply_to(self, filter: Filters) -> Filters {
         Filters {
             rotation: self.map(|r| r.0),
             ..filter
@@ -53,15 +53,16 @@ pub struct On {
 }
 
 impl BotSlashCommand for On {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
         let Some(update) = SetRotation::new(self.frequency) else {
             bad!("Frequency must not be zero.", ctx);
         };
         let frequency = update.frequency();
 
-        set_filter(&ctx, Some(update)).await?;
+        player.update_filter(Some(update)).await?;
         out!(
             format!("🍳🟢 Enabled rotation (Frequency: `{frequency} Hz.`)"),
             ctx
@@ -75,10 +76,11 @@ impl BotSlashCommand for On {
 pub struct Off;
 
 impl BotSlashCommand for Off {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        set_filter(&ctx, None::<SetRotation>).await?;
+        player.update_filter(None::<SetRotation>).await?;
         out!("🍳🔴 Disabled rotation", ctx);
     }
 }
diff --git a/lyra/src/bot/component/tuning/filter/tremolo.rs b/lyra/src/bot/component/tuning/filter/tremolo.rs
index f9ab7aa..cbaf8bb 100644
--- a/lyra/src/bot/component/tuning/filter/tremolo.rs
+++ b/lyra/src/bot/component/tuning/filter/tremolo.rs
@@ -5,9 +5,11 @@ use crate::bot::{
     command::{
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
+    },
+    component::tuning::{
+        check_user_is_dj_and_require_unsuppressed_player, filter::SetTremolo, UpdateFilter,
     },
-    component::tuning::{common_checks, filter::SetTremolo, set_filter},
     error::CommandResult,
 };
 
@@ -33,15 +35,16 @@ pub struct On {
 }
 
 impl BotSlashCommand for On {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
         let Some(update) = SetTremolo::new(self.frequency, self.depth) else {
             bad!("Both frequency and depth must not be zero.", ctx);
         };
         let settings = update.settings();
 
-        set_filter(&ctx, Some(update)).await?;
+        player.update_filter(Some(update)).await?;
         out!(format!("🎸🟢 Enabled tremolo ({settings})"), ctx);
     }
 }
@@ -52,10 +55,11 @@ impl BotSlashCommand for On {
 pub struct Off;
 
 impl BotSlashCommand for Off {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        set_filter(&ctx, None::<SetTremolo>).await?;
+        player.update_filter(None::<SetTremolo>).await?;
         out!("🎸🔴 Disabled tremolo", ctx);
     }
 }
diff --git a/lyra/src/bot/component/tuning/filter/vibrato.rs b/lyra/src/bot/component/tuning/filter/vibrato.rs
index 17b4877..c7c776e 100644
--- a/lyra/src/bot/component/tuning/filter/vibrato.rs
+++ b/lyra/src/bot/component/tuning/filter/vibrato.rs
@@ -5,9 +5,11 @@ use crate::bot::{
     command::{
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
+    },
+    component::tuning::{
+        check_user_is_dj_and_require_unsuppressed_player, filter::SetVibrato, UpdateFilter,
     },
-    component::tuning::{common_checks, filter::SetVibrato, set_filter},
     error::CommandResult,
 };
 
@@ -33,15 +35,16 @@ pub struct On {
 }
 
 impl BotSlashCommand for On {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
         let Some(update) = SetVibrato::new(self.frequency, self.depth) else {
             bad!("Both frequency and depth must not be zero.", ctx);
         };
         let settings = update.settings();
 
-        set_filter(&ctx, Some(update)).await?;
+        player.update_filter(Some(update)).await?;
         out!(format!("🎻🟢 Enabled vibrato ({settings})"), ctx);
     }
 }
@@ -52,10 +55,11 @@ impl BotSlashCommand for On {
 pub struct Off;
 
 impl BotSlashCommand for Off {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        set_filter(&ctx, None::<SetVibrato>).await?;
+        player.update_filter(None::<SetVibrato>).await?;
         out!("🎻🔴 Disabled vibrato", ctx);
     }
 }
diff --git a/lyra/src/bot/component/tuning/speed.rs b/lyra/src/bot/component/tuning/speed.rs
index d951692..341efb1 100644
--- a/lyra/src/bot/component/tuning/speed.rs
+++ b/lyra/src/bot/component/tuning/speed.rs
@@ -5,13 +5,13 @@ use crate::bot::{
     command::{
         macros::{bad, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
-    component::tuning::common_checks,
+    component::tuning::{check_user_is_dj_and_require_unsuppressed_player, UpdateFilter},
     error::CommandResult,
 };
 
-use super::UpdateFilter;
+use super::ApplyFilter;
 enum Tier {
     Default,
     Fast,
@@ -78,8 +78,8 @@ impl SpeedFilter {
     }
 }
 
-impl UpdateFilter for SpeedFilter {
-    fn apply(self, filter: Filters) -> Filters {
+impl ApplyFilter for SpeedFilter {
+    fn apply_to(self, filter: Filters) -> Filters {
         let timescale = Some(self.into_timescale_via(&filter.timescale.unwrap_or_default()));
 
         Filters {
@@ -101,17 +101,18 @@ pub struct Speed {
 }
 
 impl BotSlashCommand for Speed {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        let Some(filter) = SpeedFilter::new(self.multiplier, self.pitch_shift.unwrap_or_default())
+        let Some(update) = SpeedFilter::new(self.multiplier, self.pitch_shift.unwrap_or_default())
         else {
             bad!("Multiplier must not be 0", ctx);
         };
 
-        let multiplier = filter.multiplier();
-        let emoji = filter.tier().emoji();
-        super::set_filter(&ctx, filter).await?;
+        let multiplier = update.multiplier();
+        let emoji = update.tier().emoji();
+        player.update_filter(update).await?;
 
         out!(
             format!("{emoji} Set the playback speed to `{multiplier}`×."),
diff --git a/lyra/src/bot/component/tuning/volume.rs b/lyra/src/bot/component/tuning/volume.rs
index f3d1074..9f58ea4 100644
--- a/lyra/src/bot/component/tuning/volume.rs
+++ b/lyra/src/bot/component/tuning/volume.rs
@@ -13,7 +13,8 @@ pub(super) const fn volume_emoji(percent: Option<NonZeroU16>) -> &'static str {
         return "🔇";
     };
     match percent.get() {
-        0 => unreachable!(),
+        // SAFETY: `percent` is `NonZeroU16`, so this branch is unreachable
+        0 => unsafe { std::hint::unreachable_unchecked() },
         1..=33 => "🔈",
         34..=66 => "🔉",
         67..=100 => "🔊",
diff --git a/lyra/src/bot/component/tuning/volume/down.rs b/lyra/src/bot/component/tuning/volume/down.rs
index 090622b..dfc5729 100644
--- a/lyra/src/bot/component/tuning/volume/down.rs
+++ b/lyra/src/bot/component/tuning/volume/down.rs
@@ -3,12 +3,12 @@ use std::num::NonZeroU16;
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
 use crate::bot::{
-    command::{macros::out, model::BotSlashCommand, SlashCtx},
-    component::tuning::common_checks,
+    command::{macros::out, model::BotSlashCommand, require, SlashCtx},
+    component::tuning::check_user_is_dj_and_require_unsuppressed_player,
     core::model::{BotStateAware, HttpAware},
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
-    lavalink::{DelegateMethods, LavalinkAware},
+    gateway::GuildIdAware,
+    lavalink::LavalinkAware,
 };
 
 /// Decrease the playback volume
@@ -21,12 +21,12 @@ pub struct Down {
 }
 
 impl BotSlashCommand for Down {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (in_voice, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        let lavalink = ctx.lavalink();
         let guild_id = ctx.guild_id();
-        let data = lavalink.player_data(guild_id);
+        let data = player.data();
         let old_percent = data.read().await.volume();
 
         let maybe_new_percent = old_percent
@@ -36,10 +36,7 @@ impl BotSlashCommand for Down {
 
         let emoji = super::volume_emoji(maybe_new_percent);
         let (new_percent_str, warning) = if let Some(new_percent) = maybe_new_percent {
-            lavalink
-                .player(guild_id)
-                .set_volume(new_percent.get())
-                .await?;
+            player.context.set_volume(new_percent.get()).await?;
             data.write().await.set_volume(new_percent);
 
             (
@@ -47,7 +44,7 @@ impl BotSlashCommand for Down {
                 super::clipping_warning(new_percent),
             )
         } else {
-            lavalink.connection_mut(guild_id).mute = true;
+            ctx.lavalink().connection_mut_from(&in_voice).mute = true;
             ctx.http()
                 .update_guild_member(guild_id, ctx.bot().user_id())
                 .mute(true)
diff --git a/lyra/src/bot/component/tuning/volume/set.rs b/lyra/src/bot/component/tuning/volume/set.rs
index 09ea2ad..28225f7 100644
--- a/lyra/src/bot/component/tuning/volume/set.rs
+++ b/lyra/src/bot/component/tuning/volume/set.rs
@@ -3,11 +3,9 @@ use std::num::NonZeroU16;
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
 use crate::bot::{
-    command::{macros::out, model::BotSlashCommand, SlashCtx},
-    component::tuning::common_checks,
+    command::{macros::out, model::BotSlashCommand, require, SlashCtx},
+    component::tuning::check_user_is_dj_and_require_unsuppressed_player,
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
-    lavalink::{DelegateMethods, LavalinkAware},
 };
 
 /// Set the playback volume
@@ -20,18 +18,14 @@ pub struct Set {
 }
 
 impl BotSlashCommand for Set {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        common_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (_, player) = check_user_is_dj_and_require_unsuppressed_player(&ctx)?;
 
-        let percent = NonZeroU16::new(self.percent as u16).expect("self.percent is non-zero");
-        let lavalink = ctx.lavalink();
-        let guild_id = ctx.guild_id();
-        lavalink.player(guild_id).set_volume(percent.get()).await?;
-        lavalink
-            .player_data(guild_id)
-            .write()
-            .await
-            .set_volume(percent);
+        // SAFETY: `self.percent as u16` is in range [1, 1_000], so it is non-zero
+        let percent = unsafe { NonZeroU16::new_unchecked(self.percent as u16) };
+        player.context.set_volume(percent.get()).await?;
+        player.data().write().await.set_volume(percent);
 
         let emoji = super::volume_emoji(Some(percent));
         let warning = super::clipping_warning(percent);
diff --git a/lyra/src/bot/component/tuning/volume/toggle_mute.rs b/lyra/src/bot/component/tuning/volume/toggle_mute.rs
index 3119d43..5e0fc00 100644
--- a/lyra/src/bot/component/tuning/volume/toggle_mute.rs
+++ b/lyra/src/bot/component/tuning/volume/toggle_mute.rs
@@ -1,11 +1,11 @@
 use twilight_interactions::command::{CommandModel, CreateCommand};
 
 use crate::bot::{
-    command::{macros::out, model::BotSlashCommand, SlashCtx},
+    command::{macros::out, model::BotSlashCommand, require, SlashCtx},
     component::tuning::unmuting_checks,
     core::model::{BotStateAware, HttpAware},
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
+    gateway::GuildIdAware,
     lavalink::LavalinkAware,
 };
 
@@ -15,11 +15,12 @@ use crate::bot::{
 pub struct ToggleMute;
 
 impl BotSlashCommand for ToggleMute {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        unmuting_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let in_voice = unmuting_checks(&ctx)?;
 
         let guild_id = ctx.guild_id();
-        let mut connection = ctx.lavalink().connection_mut(guild_id);
+        let mut connection = ctx.lavalink().connection_mut_from(&in_voice);
 
         let mute = !connection.mute;
         ctx.http()
diff --git a/lyra/src/bot/component/tuning/volume/up.rs b/lyra/src/bot/component/tuning/volume/up.rs
index 19c0a4f..72db9fe 100644
--- a/lyra/src/bot/component/tuning/volume/up.rs
+++ b/lyra/src/bot/component/tuning/volume/up.rs
@@ -6,13 +6,13 @@ use crate::bot::{
     command::{
         macros::{note, out},
         model::BotSlashCommand,
-        SlashCtx,
+        require, SlashCtx,
     },
-    component::tuning::unmuting_player_checks,
+    component::tuning::check_user_is_dj_and_require_player,
     core::model::{BotStateAware, HttpAware},
     error::CommandResult,
-    gateway::ExpectedGuildIdAware,
-    lavalink::{DelegateMethods, LavalinkAware},
+    gateway::GuildIdAware,
+    lavalink::LavalinkAware,
 };
 
 /// Increase the playback volume
@@ -25,17 +25,19 @@ pub struct Up {
 }
 
 impl BotSlashCommand for Up {
-    async fn run(self, mut ctx: SlashCtx) -> CommandResult {
-        unmuting_player_checks(&ctx)?;
+    async fn run(self, ctx: SlashCtx) -> CommandResult {
+        let mut ctx = require::guild(ctx)?;
+        let (in_voice, player) = check_user_is_dj_and_require_player(&ctx)?;
 
         let lavalink = ctx.lavalink();
         let guild_id = ctx.guild_id();
-        let data = &lavalink.player_data(guild_id);
+        let data = player.data();
         let percent_u16 = self.percent.unwrap_or(10) as u16;
 
-        let max_percent = NonZeroU16::new(1_000).expect("1_000 is non-zero");
-        let (old_percent_str, new_percent) = if lavalink.connection(guild_id).mute {
-            lavalink.connection_mut(guild_id).mute = false;
+        // SAFETY: `1_000` is non-zero
+        let max_percent = unsafe { NonZeroU16::new_unchecked(1_000) };
+        let (old_percent_str, new_percent) = if lavalink.connection_from(&in_voice).mute {
+            lavalink.connection_mut_from(&in_voice).mute = false;
             ctx.http()
                 .update_guild_member(guild_id, ctx.bot().user_id())
                 .mute(false)
@@ -43,7 +45,8 @@ impl BotSlashCommand for Up {
 
             (
                 String::from("Muted"),
-                NonZeroU16::new(percent_u16).expect("self.percent is non-zero"),
+                // SAFETY: `percent_u16` is in range [1, 1_000], so it is non-zero
+                unsafe { NonZeroU16::new_unchecked(percent_u16) },
             )
         } else {
             let old_percent = data.read().await.volume();
@@ -65,10 +68,7 @@ impl BotSlashCommand for Up {
             .then_some(" (`Max`)")
             .unwrap_or_default();
 
-        lavalink
-            .player(guild_id)
-            .set_volume(new_percent.get())
-            .await?;
+        player.context.set_volume(new_percent.get()).await?;
         data.write().await.set_volume(new_percent);
 
         out!(
diff --git a/lyra/src/bot/core/const.rs b/lyra/src/bot/core/const.rs
index 5f3d4fb..350d45d 100644
--- a/lyra/src/bot/core/const.rs
+++ b/lyra/src/bot/core/const.rs
@@ -1,4 +1,6 @@
 pub mod metadata {
+    use std::sync::OnceLock;
+
     const VERSION: &str = env!("CARGO_PKG_VERSION");
     const COPYRIGHT: &str = env!("CARGO_PKG_LICENSE");
     const AUTHORS: &str = env!("CARGO_PKG_AUTHORS");
@@ -52,48 +54,69 @@ pub mod metadata {
         "%cargo_opt_level",
     ];
 
-    lazy_static::lazy_static! {
-        pub static ref BANNER: Box<str> = {
+    pub fn banner() -> &'static str {
+        static BANNER: OnceLock<&'static str> = OnceLock::new();
+        BANNER.get_or_init(|| {
             use aho_corasick::AhoCorasick;
 
             let rdr = include_str!("../../../../assets/lyra2-ascii.ans");
             let mut wtr = Vec::new();
 
             let ac = AhoCorasick::new(METADATA_PATTERNS).expect("METADATA_PATTERNS is valid");
-            ac.try_stream_replace_all(rdr.as_bytes(), &mut wtr, &METADATA_REPLACEMENTS).expect("searching is infallible");
-            String::from_utf8(wtr).expect("slice is UTF-8").into()
-        };
+            ac.try_stream_replace_all(rdr.as_bytes(), &mut wtr, &METADATA_REPLACEMENTS)
+                .expect("searching is infallible");
+            // SAFETY: since `rdr` is utf-8, `wtr` must also be utf-8
+            unsafe { String::from_utf8_unchecked(wtr).leak() }
+        })
     }
 }
 
 pub mod connection {
-    use std::time::Duration;
+    use std::{sync::OnceLock, time::Duration};
 
     pub const INACTIVITY_TIMEOUT_SECS: u16 = 600;
     pub const INACTIVITY_TIMEOUT_POLL_N: u8 = 10;
 
-    lazy_static::lazy_static! {
-        pub static ref CONNECTION_CHANGED_TIMEOUT: Duration = Duration::from_millis(500);
-        pub static ref GET_LAVALINK_CONNECTION_INFO_TIMEOUT: Duration = Duration::from_millis(2_000);
-        pub static ref INACTIVITY_TIMEOUT_POLL_INTERVAL: Duration =
-            Duration::from_secs(u64::from(INACTIVITY_TIMEOUT_SECS) / u64::from(INACTIVITY_TIMEOUT_POLL_N));
+    pub fn connection_changed_timeout() -> &'static Duration {
+        static CONNECTION_CHANGED_TIMEOUT: OnceLock<Duration> = OnceLock::new();
+        CONNECTION_CHANGED_TIMEOUT.get_or_init(|| Duration::from_millis(500))
+    }
+
+    pub fn get_lavalink_connection_info_timeout() -> &'static Duration {
+        static GET_LAVALINK_CONNECTION_INFO_TIMEOUT: OnceLock<Duration> = OnceLock::new();
+        GET_LAVALINK_CONNECTION_INFO_TIMEOUT.get_or_init(|| Duration::from_millis(2_000))
+    }
+
+    pub fn inactivity_timeout_poll_interval() -> &'static Duration {
+        static INACTIVITY_TIMEOUT_POLL_INTERVAL: OnceLock<Duration> = OnceLock::new();
+        INACTIVITY_TIMEOUT_POLL_INTERVAL.get_or_init(|| {
+            Duration::from_secs(
+                u64::from(INACTIVITY_TIMEOUT_SECS) / u64::from(INACTIVITY_TIMEOUT_POLL_N),
+            )
+        })
     }
 }
 
 pub mod misc {
-    use std::time::Duration;
+    use std::{sync::OnceLock, time::Duration};
 
     pub const ADD_TRACKS_WRAP_LIMIT: usize = 3;
     pub const WAIT_FOR_NOT_SUPPRESSED_TIMEOUT_SECS: u8 = 30;
 
-    lazy_static::lazy_static! {
-        pub static ref WAIT_FOR_BOT_EVENTS_TIMEOUT: Duration = Duration::from_millis(1_000);
-        pub static ref WAIT_FOR_NOT_SUPPRESSED_TIMEOUT: Duration = Duration::from_secs(WAIT_FOR_NOT_SUPPRESSED_TIMEOUT_SECS.into());
-        pub static ref DESTRUCTIVE_COMMAND_CONFIRMATION_TIMEOUT: Duration = Duration::from_secs(60);
+    pub fn wait_for_bot_events_timeout() -> &'static Duration {
+        static WAIT_FOR_BOT_EVENTS_TIMEOUT: OnceLock<Duration> = OnceLock::new();
+        WAIT_FOR_BOT_EVENTS_TIMEOUT.get_or_init(|| Duration::from_millis(1_000))
+    }
+
+    pub fn destructive_command_confirmation_timeout() -> &'static Duration {
+        static DESTRUCTIVE_COMMAND_CONFIRMATION_TIMEOUT: OnceLock<Duration> = OnceLock::new();
+        DESTRUCTIVE_COMMAND_CONFIRMATION_TIMEOUT.get_or_init(|| Duration::from_secs(60))
     }
 }
 
 pub mod text {
+    use std::sync::OnceLock;
+
     use fuzzy_matcher::skim::SkimMatcherV2;
 
     pub const UNTITLED_TRACK: &str = "(Untitled Track)";
@@ -102,24 +125,45 @@ pub mod text {
     pub const EMPTY_EMBED_FIELD: &str = "`-Empty-`";
     pub const NO_ROWS_AFFECTED_MESSAGE: &str = "🔐 No changes were made.";
 
-    lazy_static::lazy_static! {
-        pub static ref FUZZY_MATCHER: SkimMatcherV2 = SkimMatcherV2::default();
+    pub fn fuzzy_matcher() -> &'static SkimMatcherV2 {
+        static FUZZY_MATCHER: OnceLock<SkimMatcherV2> = OnceLock::new();
+        FUZZY_MATCHER.get_or_init(SkimMatcherV2::default)
     }
 }
 
 pub mod regex {
+    use std::sync::OnceLock;
+
     use regex::Regex;
 
-    lazy_static::lazy_static! {
-        pub static ref URL: Regex =
-            Regex::new(r"(https://www\.|http://www\.|https://|http://)?[a-zA-Z]{2,}(\.[a-zA-Z]{2,})(\.[a-zA-Z]{2,})?/[a-zA-Z0-9]{2,}|((https://www\.|http://www\.|https://|http://)?[a-zA-Z]{2,}(\.[a-zA-Z]{2,})(\.[a-zA-Z]{2,})?)|(https://www\.|http://www\.|https://|http://)?[a-zA-Z0-9]{2,}\.[a-zA-Z0-9]{2,}\.[a-zA-Z0-9]{2,}(\.[a-zA-Z0-9]{2,})?")
-                .expect("regex is valid");
-        pub static ref TIMESTAMP: Regex =
-            Regex::new(r"^(((?<h>[1-9]\d*):(?<m1>[0-5]\d))|(?<m2>[0-5]?\d)):(?<s>[0-5]\d)(\.(?<ms>\d{3}))?$")
-                .expect("regex is valild");
-        pub static ref TIMESTAMP_2: Regex =
-            Regex::new(r"^((?<h>[1-9]\d*)\s?hr?)?\s*((?<m>[1-9]|[1-5]\d)\s?m(in)?)?\s*((?<s>[1-9]|[1-5]\d)\s?s(ec)?)?\s*((?<ms>[1-9]\d{0,2})\s?ms(ec)?)?$")
-                .expect("regex is valid");
+    pub fn url() -> &'static Regex {
+        static URL: OnceLock<Regex> = OnceLock::new();
+        URL.get_or_init(|| {
+            Regex::new(
+                r"(https://www\.|http://www\.|https://|http://)?[a-zA-Z]{2,}(\.[a-zA-Z]{2,})(\.[a-zA-Z]{2,})?/[a-zA-Z0-9]{2,}|((https://www\.|http://www\.|https://|http://)?[a-zA-Z]{2,}(\.[a-zA-Z]{2,})(\.[a-zA-Z]{2,})?)|(https://www\.|http://www\.|https://|http://)?[a-zA-Z0-9]{2,}\.[a-zA-Z0-9]{2,}\.[a-zA-Z0-9]{2,}(\.[a-zA-Z0-9]{2,})?"
+            )
+            .expect("regex is valid")
+        })
+    }
+
+    pub fn timestamp() -> &'static Regex {
+        static TIMESTAMP: OnceLock<Regex> = OnceLock::new();
+        TIMESTAMP.get_or_init(|| {
+            Regex::new(
+                r"^(((?<h>[1-9]\d*):(?<m1>[0-5]\d))|(?<m2>[0-5]?\d)):(?<s>[0-5]\d)(\.(?<ms>\d{3}))?$",
+            )
+            .expect("regex is valid")
+        })
+    }
+
+    pub fn timestamp_2() -> &'static Regex {
+        static TIMESTAMP_2: OnceLock<Regex> = OnceLock::new();
+        TIMESTAMP_2.get_or_init(|| {
+            Regex::new(
+                r"^((?<h>[1-9]\d*)\s?hr?)?\s*((?<m>[1-9]|[1-5]\d)\s?m(in)?)?\s*((?<s>[1-9]|[1-5]\d)\s?s(ec)?)?\s*((?<ms>[1-9]\d{0,2})\s?ms(ec)?)?$"
+            )
+            .expect("regex is valid")
+        })
     }
 }
 
diff --git a/lyra/src/bot/core/model.rs b/lyra/src/bot/core/model.rs
index 469cd62..02f11d5 100644
--- a/lyra/src/bot/core/model.rs
+++ b/lyra/src/bot/core/model.rs
@@ -102,6 +102,10 @@ impl BotInfo {
 pub type BotStateRef<'a> = &'a BotState;
 pub type OwnedBotState = Arc<BotState>;
 
+pub trait AuthorIdAware {
+    fn author_id(&self) -> Id<UserMarker>;
+}
+
 pub trait AuthorPermissionsAware {
     fn author_permissions(&self) -> Permissions;
 }
@@ -173,7 +177,7 @@ impl BotState {
     pub fn user(&self) -> CurrentUser {
         self.cache
             .current_user()
-            .expect("current user should be in cache")
+            .unwrap_or_else(|| panic!("current user isn't in cache"))
     }
 
     #[inline]
diff --git a/lyra/src/bot/core/model/interaction.rs b/lyra/src/bot/core/model/interaction.rs
index 2b44856..8640ee9 100644
--- a/lyra/src/bot/core/model/interaction.rs
+++ b/lyra/src/bot/core/model/interaction.rs
@@ -15,7 +15,7 @@ use twilight_util::builder::InteractionResponseDataBuilder;
 
 use crate::bot::{
     command::{
-        declare::{MESSAGE_COMMANDS, POPULATED_COMMANDS_MAP, SLASH_COMMANDS},
+        declare::{message_commands, slash_commands, POPULATED_COMMANDS_MAP},
         model::CommandInfoAware,
     },
     error::core::{FollowupResult, RegisterGlobalCommandsError, RespondResult},
@@ -44,6 +44,7 @@ impl Interface<'_> {
     ) -> MessageRespondResult {
         let interaction_token = self.interaction_token();
         self.inner
+            .0
             .create_response(
                 self.interaction_id,
                 interaction_token,
@@ -54,7 +55,7 @@ impl Interface<'_> {
             )
             .await?;
 
-        self.inner.response(interaction_token).await
+        self.inner.0.response(interaction_token).await
     }
 
     pub async fn update_message_with(
@@ -63,6 +64,7 @@ impl Interface<'_> {
     ) -> MessageRespondResult {
         let interaction_token = self.interaction_token();
         self.inner
+            .0
             .create_response(
                 self.interaction_id,
                 interaction_token,
@@ -73,11 +75,11 @@ impl Interface<'_> {
             )
             .await?;
 
-        self.inner.response(interaction_token).await
+        self.inner.0.response(interaction_token).await
     }
 
     fn update(&self) -> UpdateResponse<'_> {
-        self.inner.update_response(self.interaction_token())
+        self.inner.0.update_response(self.interaction_token())
     }
 
     pub async fn update_no_components_embeds(&self, content: &str) -> MessageFollowupResult {
@@ -108,6 +110,7 @@ impl Interface<'_> {
     pub async fn followup(&self, content: &str) -> MessageFollowupResult {
         Ok(self
             .inner
+            .0
             .create_followup(self.interaction_token())
             .content(content)
             .await?)
@@ -116,6 +119,7 @@ impl Interface<'_> {
     pub async fn followup_ephem(&self, content: &str) -> MessageFollowupResult {
         Ok(self
             .inner
+            .0
             .create_followup(self.interaction_token())
             .flags(MessageFlags::EPHEMERAL)
             .content(content)
@@ -142,6 +146,7 @@ impl Interface<'_> {
             .into();
 
         self.inner
+            .0
             .create_response(
                 self.interaction_id,
                 self.interaction_token(),
@@ -164,6 +169,7 @@ impl Interface<'_> {
             .into();
 
         self.inner
+            .0
             .create_response(
                 self.interaction_id,
                 self.interaction_token(),
@@ -182,6 +188,7 @@ impl Interface<'_> {
         content: &str,
     ) -> UnitFollowupResult {
         self.inner
+            .0
             .update_followup(self.interaction_token(), message_id)
             .content(Some(content))
             .await?;
@@ -190,6 +197,7 @@ impl Interface<'_> {
 
     pub async fn delete_followup(&self, message_id: Id<MessageMarker>) -> UnitRespondResult {
         self.inner
+            .0
             .delete_followup(self.interaction_token(), message_id)
             .await?;
         Ok(())
@@ -211,7 +219,10 @@ impl<'a> Client<'a> {
 
     pub async fn register_global_commands(&self) -> Result<(), RegisterGlobalCommandsError> {
         let commands = self
-            .set_global_commands(&[SLASH_COMMANDS.as_ref(), MESSAGE_COMMANDS.as_ref()].concat())
+            .0
+            .set_global_commands(
+                &[slash_commands().as_slice(), message_commands().as_slice()].concat(),
+            )
             .await?
             .models()
             .await?;
@@ -230,7 +241,7 @@ impl<'a> Client<'a> {
     ) -> &'static twilight_model::application::command::Command {
         POPULATED_COMMANDS_MAP
             .get()
-            .expect("POPULATED_COMMANDS_MAP is populated")
+            .unwrap_or_else(|| panic!("`POPULATED_COMMANDS_MAP` is not yet populated"))
             .get(T::name())
             .unwrap_or_else(|| panic!("command not found: {}", T::name()))
     }
@@ -239,16 +250,27 @@ impl<'a> Client<'a> {
         let cmd = Self::populated_command::<T>();
 
         let name = &cmd.name;
-        let id = cmd.id.expect("id exists");
+        let id = cmd
+            .id
+            .unwrap_or_else(|| panic!("`POPULATED_COMMANDS_MAP` is not yet populated"));
         format!("</{name}:{id}>").into_boxed_str()
     }
-}
 
-impl<'a> std::ops::Deref for Client<'a> {
-    type Target = twilight_http::client::InteractionClient<'a>;
+    #[inline]
+    pub const fn create_followup(
+        &'a self,
+        interaction_token: &'a str,
+    ) -> twilight_http::request::application::interaction::CreateFollowup<'a> {
+        self.0.create_followup(interaction_token)
+    }
 
-    fn deref(&self) -> &Self::Target {
-        &self.0
+    #[inline]
+    pub const fn delete_followup(
+        &'a self,
+        interaction_token: &'a str,
+        message_id: Id<MessageMarker>,
+    ) -> twilight_http::request::application::interaction::DeleteFollowup<'a> {
+        self.0.delete_followup(interaction_token, message_id)
     }
 }
 
diff --git a/lyra/src/bot/error.rs b/lyra/src/bot/error.rs
index 198a94b..1db7468 100644
--- a/lyra/src/bot/error.rs
+++ b/lyra/src/bot/error.rs
@@ -5,6 +5,7 @@ pub mod gateway;
 pub mod lavalink;
 pub mod runner;
 
+pub use command::Error as CommandError;
 pub use command::Result as CommandResult;
 
 use thiserror::Error;
@@ -22,6 +23,8 @@ pub trait EPrint: std::error::Error + std::fmt::Debug {
 #[error("missing from cache")]
 pub struct Cache;
 
+pub type CacheResult<T> = Result<T, Cache>;
+
 #[derive(Debug, Error)]
 #[error("user is not a DJ")]
 pub struct UserNotDj;
@@ -166,3 +169,7 @@ pub enum RunError {
     Dotenvy(#[from] dotenvy::Error),
     StartError(#[from] runner::StartError),
 }
+
+#[derive(Error, Debug)]
+#[error("not in a guild")]
+pub struct NotInGuild;
diff --git a/lyra/src/bot/error/command.rs b/lyra/src/bot/error/command.rs
index 707a42e..4aca3fa 100644
--- a/lyra/src/bot/error/command.rs
+++ b/lyra/src/bot/error/command.rs
@@ -47,6 +47,10 @@ pub enum Error {
     TwilightHttp(#[from] twilight_http::Error),
     Lavalink(#[from] lavalink_rs::error::LavalinkError),
     NoPlayer(#[from] super::lavalink::NoPlayerError),
+    NotInGuild(#[from] super::NotInGuild),
+    CheckUserOnlyIn(#[from] check::UserOnlyInError),
+    Cache(#[from] super::Cache),
+    HandlePoll(#[from] check::HandlePollError),
 }
 
 pub enum FlattenedError<'a> {
@@ -84,6 +88,7 @@ pub enum FlattenedError<'a> {
     AutoJoinAttemptFailed(&'a super::AutoJoinAttemptFailed),
     Lavalink(&'a lavalink_rs::error::LavalinkError),
     NoPlayer(&'a super::lavalink::NoPlayerError),
+    NotInGuild(&'a super::NotInGuild),
 }
 
 pub use FlattenedError as Fe;
@@ -216,9 +221,7 @@ impl<'a> Fe<'a> {
             check::HandleInVoiceWithSomeoneElseError::PollResolvable(e) => {
                 Self::from_vote_resolvable(e)
             }
-            check::HandleInVoiceWithSomeoneElseError::HandlePollError(e) => {
-                Self::from_handle_poll(e)
-            }
+            check::HandleInVoiceWithSomeoneElseError::HandlePoll(e) => Self::from_handle_poll(e),
         }
     }
 
@@ -531,6 +534,8 @@ impl Error {
             Self::TwilightHttp(e) => Fe::TwilightHttp(e),
             Self::Lavalink(e) => Fe::Lavalink(e),
             Self::NoPlayer(e) => Fe::NoPlayer(e),
+            Self::NotInGuild(e) => Fe::NotInGuild(e),
+            Self::Cache(e) => Fe::Cache(e),
             Self::CheckNotSuppressed(e) => Fe::from_check_not_suppressed_error(e),
             Self::CheckUsersTrack(e) => Fe::from_users_track_error(e),
             Self::InVoiceWithSomeoneElse(e) => Fe::from_in_voice_with_someone_else_error(e),
@@ -544,6 +549,8 @@ impl Error {
             Self::Play(e) => Fe::from_play(e),
             Self::DeserializeBodyFromHttp(e) => Fe::from_deserialize_body_from_http_error(e),
             Self::RemoveTracks(e) => Fe::from_remove_tracks(e),
+            Self::CheckUserOnlyIn(e) => Fe::from_check_user_only_in(e),
+            Self::HandlePoll(e) => Fe::from_handle_poll(e),
         }
     }
 }
@@ -556,6 +563,7 @@ pub enum AutocompleteError {
     LoadFailed(#[from] super::LoadFailed),
     Respond(#[from] RespondError),
     Lavalink(#[from] lavalink_rs::error::LavalinkError),
+    NotInGuild(#[from] super::NotInGuild),
 }
 
 pub type AutocompleteResult = core::result::Result<(), AutocompleteError>;
diff --git a/lyra/src/bot/error/command/check.rs b/lyra/src/bot/error/command/check.rs
index 8204fab..33cc353 100644
--- a/lyra/src/bot/error/command/check.rs
+++ b/lyra/src/bot/error/command/check.rs
@@ -173,7 +173,7 @@ pub enum PollLossErrorKind {
 #[error(transparent)]
 pub enum HandleInVoiceWithSomeoneElseError {
     PollResolvable(#[from] PollResolvableError),
-    HandlePollError(#[from] HandlePollError),
+    HandlePoll(#[from] HandlePollError),
 }
 
 #[derive(Error, Debug)]
@@ -189,3 +189,10 @@ pub enum RunError {
     Paused(#[from] error::Paused),
     Stopped(#[from] error::Stopped),
 }
+
+#[derive(Error, Debug)]
+#[error(transparent)]
+pub enum OnlyElsePoll {
+    Cache(#[from] CacheError),
+    HandlePoll(#[from] HandlePollError),
+}
diff --git a/lyra/src/bot/ext/image.rs b/lyra/src/bot/ext/image.rs
index 7c5a941..9c4ae6c 100644
--- a/lyra/src/bot/ext/image.rs
+++ b/lyra/src/bot/ext/image.rs
@@ -1,5 +1,3 @@
-use std::ops::Deref;
-
 use image::{self, imageops::FilterType, DynamicImage, GenericImageView};
 use kmeans_colors::Sort;
 use palette::{cast::from_component_slice, FromColor, IntoColor, Lab, Srgb, Srgba};
@@ -28,19 +26,23 @@ impl DominantPalette for DynamicImage {
             .map(|x| x.into_format::<_, f32>().into_color())
             .collect::<Vec<Lab>>();
 
-        let result = (0..RUNS)
-            .map(|i| {
-                kmeans_colors::get_kmeans_hamerly(
-                    palette_size,
-                    MAX_ITERATIONS,
-                    COVERAGE,
-                    false,
-                    &lab,
-                    RANDOM_SEED + u64::from(i),
-                )
-            })
-            .max_by(|k1, k2| k1.score.total_cmp(&k2.score))
-            .expect("RUNS is non-zero");
+        // SAFETY: `0..RUNS` is a non-empty iterator,
+        //         so unwrapping `.max_by(...)` is safe
+        let result = unsafe {
+            (0..RUNS)
+                .map(|i| {
+                    kmeans_colors::get_kmeans_hamerly(
+                        palette_size,
+                        MAX_ITERATIONS,
+                        COVERAGE,
+                        false,
+                        &lab,
+                        RANDOM_SEED + u64::from(i),
+                    )
+                })
+                .max_by(|k1, k2| k1.score.total_cmp(&k2.score))
+                .unwrap_unchecked()
+        };
 
         let mut res = Lab::sort_indexed_colors(&result.centroids, &result.indices);
         res.sort_unstable_by(|a, b| (b.percentage).total_cmp(&a.percentage));
@@ -63,14 +65,6 @@ impl LimitImageFileSizeResponse {
     }
 }
 
-impl Deref for LimitImageFileSizeResponse {
-    type Target = DynamicImage;
-
-    fn deref(&self) -> &Self::Target {
-        &self.image
-    }
-}
-
 #[derive(Debug, PartialEq, Eq)]
 pub enum LimitImageFileSizeResponseKind {
     Noop,
diff --git a/lyra/src/bot/ext/util.rs b/lyra/src/bot/ext/util.rs
index fcf3e2c..eee749c 100644
--- a/lyra/src/bot/ext/util.rs
+++ b/lyra/src/bot/ext/util.rs
@@ -1,6 +1,7 @@
 use std::{
     borrow::{Borrow, Cow},
     fmt::{Debug, Display},
+    ops::Add,
     str::FromStr,
 };
 
@@ -134,21 +135,14 @@ pub trait ViaGrapheme: UnicodeSegmentation {
 
 impl ViaGrapheme for str {}
 
-pub trait PrettyTruncator: ViaGrapheme {
+pub trait PrettyTruncator: ViaGrapheme + ToOwned + 'static
+where
+    for<'a> Cow<'a, Self>: Add<&'a Self, Output = Cow<'a, Self>>,
+{
     fn trail() -> &'static Self;
     fn pretty_truncate(&self, new_len: usize) -> Cow<Self>
     where
-        Self: ToOwned;
-}
-
-impl PrettyTruncator for str {
-    fn trail() -> &'static Self {
-        "…"
-    }
-
-    fn pretty_truncate(&self, new_len: usize) -> Cow<Self>
-    where
-        Self: ToOwned,
+        for<'a> <Self as ToOwned>::Owned: FromIterator<&'a str>,
     {
         let trail = Self::trail();
 
@@ -158,6 +152,12 @@ impl PrettyTruncator for str {
     }
 }
 
+impl PrettyTruncator for str {
+    fn trail() -> &'static Self {
+        "…"
+    }
+}
+
 pub trait FlagsPrettify: Flags {
     fn prettify(&self) -> String {
         self.iter_names()
@@ -177,21 +177,13 @@ pub trait FlagsPrettify: Flags {
 #[derive(PartialEq, Eq, Debug)]
 pub struct PrettifiedTimestamp(Duration);
 
-impl std::ops::Deref for PrettifiedTimestamp {
-    type Target = Duration;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
 impl FromStr for PrettifiedTimestamp {
     type Err = PrettifiedTimestampParseError;
 
     fn from_str(value: &str) -> Result<Self, Self::Err> {
-        let captures = if let Some(captures) = const_regex::TIMESTAMP.captures(value) {
+        let captures = if let Some(captures) = const_regex::timestamp().captures(value) {
             captures
-        } else if let Some(captures) = const_regex::TIMESTAMP_2.captures(value) {
+        } else if let Some(captures) = const_regex::timestamp_2().captures(value) {
             captures
         } else {
             return Err(PrettifiedTimestampParseError);
diff --git a/lyra/src/bot/gateway.rs b/lyra/src/bot/gateway.rs
index b3fe2b8..7457140 100644
--- a/lyra/src/bot/gateway.rs
+++ b/lyra/src/bot/gateway.rs
@@ -6,6 +6,6 @@ mod shard;
 pub mod voice;
 
 pub use self::{
-    model::{ExpectedGuildIdAware, GuildIdAware, LastCachedStates, Process, SenderAware},
+    model::{GuildIdAware, LastCachedStates, OptionallyGuildIdAware, Process, SenderAware},
     process::process,
 };
diff --git a/lyra/src/bot/gateway/guild.rs b/lyra/src/bot/gateway/guild.rs
index 3b72eca..184c22a 100644
--- a/lyra/src/bot/gateway/guild.rs
+++ b/lyra/src/bot/gateway/guild.rs
@@ -23,8 +23,7 @@ impl CreateContext<'_> {
         }
 
         sqlx::query!(
-            r"--sql
-            INSERT INTO guild_configs
+            "INSERT INTO guild_configs
                 (id)
             SELECT $1
             WHERE
diff --git a/lyra/src/bot/gateway/interaction.rs b/lyra/src/bot/gateway/interaction.rs
index 9039bef..e9495a3 100644
--- a/lyra/src/bot/gateway/interaction.rs
+++ b/lyra/src/bot/gateway/interaction.rs
@@ -1,4 +1,4 @@
-use std::sync::Arc;
+use std::{hint::unreachable_unchecked, sync::Arc};
 
 use twilight_gateway::{Latency, MessageSender};
 use twilight_mention::Mention;
@@ -14,6 +14,7 @@ use super::model::Process;
 use crate::bot::{
     command::{
         macros::{bad, cant, caut, crit, err, hid, nope, note, out_upd, sus, sus_fol},
+        model::NonPingInteraction,
         util::MessageLinkAware,
         AutocompleteCtx, MessageCtx, SlashCtx,
     },
@@ -67,32 +68,35 @@ impl BotState {
 impl Process for Context {
     async fn process(self) -> ProcessResult {
         match self.inner.kind {
-            InteractionType::ApplicationCommand => self.process_as_app_command().await,
-            InteractionType::ApplicationCommandAutocomplete => self.process_as_autocomplete().await,
-            InteractionType::MessageComponent => self.process_as_component().await,
-            InteractionType::ModalSubmit | InteractionType::Ping => Ok(()),
+            // SAFETY: `self.inner.kind` is `ApplicationCommand`, so this is safe
+            InteractionType::ApplicationCommand => unsafe { self.process_as_app_command() }.await,
+            InteractionType::ApplicationCommandAutocomplete => {
+                // SAFETY: `self.inner.kind` is `ApplicationCommandAutocomplete`, so this is safe
+                unsafe { self.process_as_autocomplete() }.await
+            }
+            // SAFETY: `self.inner.kind` is `MessageComponent`, so this is safe
+            InteractionType::MessageComponent => unsafe { self.process_as_component() }.await,
+            InteractionType::ModalSubmit | InteractionType::Ping => Ok(()), // ignored
             _ => unimplemented!(),
         }
     }
 }
 
 impl Context {
-    async fn process_as_app_command(mut self) -> ProcessResult {
+    async unsafe fn process_as_app_command(mut self) -> ProcessResult {
         let bot = self.bot;
         let i = bot.interaction().await?.interfaces(&self.inner);
 
         let Some(InteractionData::ApplicationCommand(data)) = self.inner.data.take() else {
-            unreachable!()
+            // SAFETY: interaction is of type `ApplicationCommand`,
+            //         so `self.inner.data.take()` will always be `InteractionData::ApplicationCommand(_)`
+            unsafe { std::hint::unreachable_unchecked() }
         };
 
         let name = data.name.clone().into();
         let inner_guild_id = self.inner.guild_id;
-        let channel_id = self
-            .inner
-            .channel
-            .as_ref()
-            .map(|c| c.id)
-            .expect("interaction type is not ping");
+        // SAFETY: interaction type is not `Ping`, so `channel` is present
+        let channel_id = unsafe { self.inner.channel_id_unchecked() };
 
         let result = match data.kind {
             CommandType::ChatInput => {
@@ -122,13 +126,10 @@ impl Context {
         };
 
         if let Some(guild_id) = inner_guild_id {
-            let lavalink = bot.lavalink();
-
-            if lavalink
-                .get_connection(guild_id)
-                .is_some_and(|c| c.text_channel_id != channel_id)
-            {
-                lavalink.connection_mut(guild_id).text_channel_id = channel_id;
+            if let Some(mut connection) = bot.lavalink().get_connection_mut(guild_id) {
+                if connection.text_channel_id != channel_id {
+                    connection.text_channel_id = channel_id;
+                }
             }
         }
 
@@ -142,7 +143,9 @@ impl Context {
             }
             Fuunacee::Command(_) => {
                 let CommandExecuteError::Command(error) = source else {
-                    unreachable!()
+                    // SAFETY: `source.flatten_until_user_not_allowed_as()` is `Fuunacee::Command(_)`,
+                    //         so the unflattened source error must be `CommandExecuteError::Command(_)`
+                    unsafe { unreachable_unchecked() }
                 };
                 match_error(error, name, i).await
             }
@@ -155,9 +158,10 @@ impl Context {
         }
     }
 
-    async fn process_as_autocomplete(mut self) -> ProcessResult {
+    async unsafe fn process_as_autocomplete(mut self) -> ProcessResult {
         let Some(InteractionData::ApplicationCommand(data)) = self.inner.data.take() else {
-            unreachable!()
+            // SAFETY:
+            unsafe { unreachable_unchecked() }
         };
 
         let name = data.name.clone().into();
@@ -178,7 +182,7 @@ impl Context {
     }
 
     #[allow(clippy::unused_async)]
-    async fn process_as_component(self) -> ProcessResult {
+    async unsafe fn process_as_component(self) -> ProcessResult {
         // TODO: implement controller
         Ok(())
     }
diff --git a/lyra/src/bot/gateway/model.rs b/lyra/src/bot/gateway/model.rs
index 56ed0e7..38d8d5b 100644
--- a/lyra/src/bot/gateway/model.rs
+++ b/lyra/src/bot/gateway/model.rs
@@ -13,11 +13,11 @@ pub trait SenderAware {
     fn sender(&self) -> &MessageSender;
 }
 
-pub trait GuildIdAware {
+pub trait OptionallyGuildIdAware {
     fn get_guild_id(&self) -> Option<Id<GuildMarker>>;
 }
 
-pub trait ExpectedGuildIdAware {
+pub trait GuildIdAware {
     fn guild_id(&self) -> Id<GuildMarker>;
 }
 
@@ -32,7 +32,10 @@ impl LastCachedStates {
             Event::VoiceStateUpdate(event) => cache
                 .voice_state(
                     event.user_id,
-                    event.guild_id.expect("event received in a guild"),
+                    // SAFETY: this bot cannot join DM voice calls,
+                    //         meaning all voice states will be from a guild voice channel,
+                    //         so `e.guild_id` is present
+                    unsafe { event.guild_id.unwrap_unchecked() },
                 )
                 .as_deref()
                 .cloned(),
diff --git a/lyra/src/bot/gateway/shard.rs b/lyra/src/bot/gateway/shard.rs
index e91e379..54a5616 100644
--- a/lyra/src/bot/gateway/shard.rs
+++ b/lyra/src/bot/gateway/shard.rs
@@ -41,18 +41,17 @@ impl Process for ReadyContext<'_> {
 
         self.inner.guilds.iter().for_each(|g| {
             let db = self.bot.db().clone();
-            let g = g.id.get() as i64;
+            let guild_id = g.id.get() as i64;
             set.spawn(async move {
                 sqlx::query!(
-                    r"--sql
-                    INSERT INTO guild_configs
+                    "INSERT INTO guild_configs
                         (id)
                     SELECT $1
                     WHERE
                         NOT EXISTS (
                             SELECT 1 FROM guild_configs WHERE id = $1
                         );",
-                    g
+                    guild_id
                 )
                 .execute(&db)
                 .await?;
diff --git a/lyra/src/bot/gateway/voice.rs b/lyra/src/bot/gateway/voice.rs
index 6befd41..6b6203b 100644
--- a/lyra/src/bot/gateway/voice.rs
+++ b/lyra/src/bot/gateway/voice.rs
@@ -12,7 +12,7 @@ use crate::bot::component::{connection, tuning};
 use crate::bot::core::model::{BotState, BotStateAware, CacheAware, HttpAware, OwnedBotStateAware};
 use crate::bot::error::gateway::ProcessResult;
 use crate::bot::{
-    gateway::{ExpectedGuildIdAware, SenderAware},
+    gateway::{GuildIdAware, SenderAware},
     lavalink::{Lavalink, LavalinkAware},
 };
 
@@ -83,9 +83,12 @@ impl SenderAware for Context {
     }
 }
 
-impl ExpectedGuildIdAware for Context {
+impl GuildIdAware for Context {
     fn guild_id(&self) -> Id<GuildMarker> {
-        self.inner.guild_id.expect("event received in a guild")
+        // SAFETY: this bot cannot join DM voice calls,
+        //         meaning all voice states will be from a guild voice channel,
+        //         so `e.guild_id` is present
+        unsafe { self.inner.guild_id.unwrap_unchecked() }
     }
 }
 
diff --git a/lyra/src/bot/lavalink.rs b/lyra/src/bot/lavalink.rs
index 6c3900e..4a1c06a 100644
--- a/lyra/src/bot/lavalink.rs
+++ b/lyra/src/bot/lavalink.rs
@@ -6,10 +6,10 @@ mod track;
 
 pub use self::{
     model::{
-        wait_for_with, ClientAware as LavalinkAware, CorrectPlaylistInfo, CorrectTrackInfo,
-        DelegateMethods, Event, EventRecvResult, ExpectedPlayerAware, ExpectedPlayerDataAware,
-        IndexerType, Lavalink, Pitch, PlayerAware, PlayerDataAware, Queue, QueueItem, RepeatMode,
+        wait_for_with, ClientAware as LavalinkAware, Connection, CorrectPlaylistInfo,
+        CorrectTrackInfo, DelegateMethods, Event, EventRecvResult, IndexerType, Lavalink, Pitch,
+        PlayerAware, PlayerDataRwLockArc, Queue, QueueItem, RepeatMode, UnwrappedPlayerData,
+        UnwrappedPlayerInfoUri,
     },
-    plugin::PluginInfo,
     process::handlers,
 };
diff --git a/lyra/src/bot/lavalink/model.rs b/lyra/src/bot/lavalink/model.rs
index fc977df..b6b6e9c 100644
--- a/lyra/src/bot/lavalink/model.rs
+++ b/lyra/src/bot/lavalink/model.rs
@@ -4,10 +4,12 @@ mod pitch;
 mod queue;
 mod queue_indexer;
 
-use std::{num::NonZeroU16, ops::Deref, sync::Arc};
+use std::{num::NonZeroU16, sync::Arc};
 
 use lavalink_rs::{
-    client::LavalinkClient, error::LavalinkResult, model::player::ConnectionInfo,
+    client::LavalinkClient,
+    error::LavalinkResult,
+    model::{player::ConnectionInfo, track::TrackInfo},
     player_context::PlayerContext,
 };
 use tokio::sync::RwLock;
@@ -17,46 +19,30 @@ use twilight_model::id::{
 };
 
 use crate::bot::{
+    command::require::{CachelessInVoice, InVoice},
     core::r#const,
-    gateway::{ExpectedGuildIdAware, GuildIdAware},
+    gateway::GuildIdAware,
 };
 
-use self::connection::{Connection, ConnectionRef, ConnectionRefMut};
+use self::connection::{ConnectionRef, ConnectionRefMut};
 
 pub use self::{
-    connection::{wait_for_with, Event, EventRecvResult},
+    connection::{wait_for_with, Connection, Event, EventRecvResult},
     correct_info::{CorrectPlaylistInfo, CorrectTrackInfo},
     pitch::Pitch,
     queue::{Item as QueueItem, Queue, RepeatMode},
     queue_indexer::IndexerType,
 };
 
-type PlayerDataRwLockArc = Arc<RwLock<PlayerData>>;
+pub type PlayerDataRwLockArc = Arc<RwLock<PlayerData>>;
 
 pub trait ClientAware {
     fn lavalink(&self) -> &Lavalink;
 }
 
-pub trait PlayerDataAware: ClientAware + GuildIdAware {
-    fn get_player_data(&self) -> Option<PlayerDataRwLockArc> {
-        self.lavalink().get_player_data(self.get_guild_id()?)
-    }
-}
-pub trait ExpectedPlayerDataAware: ClientAware + ExpectedGuildIdAware {
-    fn player_data(&self) -> PlayerDataRwLockArc {
-        self.lavalink().player_data(self.guild_id())
-    }
-}
-
 pub trait PlayerAware: ClientAware + GuildIdAware {
     fn get_player(&self) -> Option<PlayerContext> {
-        self.lavalink().get_player_context(self.get_guild_id()?)
-    }
-}
-
-pub trait ExpectedPlayerAware: ClientAware + ExpectedGuildIdAware {
-    fn player(&self) -> PlayerContext {
-        self.lavalink().player(self.guild_id())
+        self.lavalink().get_player_context(self.guild_id())
     }
 }
 
@@ -68,9 +54,10 @@ pub struct PlayerData {
 }
 
 impl PlayerData {
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self {
-            volume: NonZeroU16::new(100).expect("volume is non-zero"),
+            // SAFETY: `100` is non-zero
+            volume: unsafe { NonZeroU16::new_unchecked(100) },
             pitch: Pitch::new(),
             queue: Queue::new(),
             now_playing_message_id: None,
@@ -103,6 +90,71 @@ pub struct Lavalink {
     connections: dashmap::DashMap<Id<GuildMarker>, Connection>,
 }
 
+impl DelegateMethods for Lavalink {
+    #[inline]
+    fn handle_voice_server_update(
+        &self,
+        guild_id: impl Into<LavalinkGuildId>,
+        token: String,
+        endpoint: Option<String>,
+    ) {
+        <LavalinkClient as DelegateMethods>::handle_voice_server_update(
+            &self.inner,
+            guild_id,
+            token,
+            endpoint,
+        );
+    }
+
+    #[inline]
+    fn handle_voice_state_update(
+        &self,
+        guild_id: impl Into<LavalinkGuildId>,
+        channel_id: Option<impl Into<lavalink_rs::model::ChannelId>>,
+        user_id: impl Into<lavalink_rs::model::UserId>,
+        session_id: String,
+    ) {
+        <LavalinkClient as DelegateMethods>::handle_voice_state_update(
+            &self.inner,
+            guild_id,
+            channel_id,
+            user_id,
+            session_id,
+        );
+    }
+
+    #[inline]
+    async fn get_connection_info(
+        &self,
+        guild_id: impl Into<LavalinkGuildId> + Send,
+        timeout: std::time::Duration,
+    ) -> LavalinkResult<ConnectionInfo> {
+        <LavalinkClient as DelegateMethods>::get_connection_info(&self.inner, guild_id, timeout)
+            .await
+    }
+
+    #[inline]
+    async fn create_player_context_with_data<Data: std::any::Any + Send + Sync>(
+        &self,
+        guild_id: impl Into<LavalinkGuildId> + Send,
+        connection_info: impl Into<ConnectionInfo> + Send,
+        user_data: Arc<Data>,
+    ) -> LavalinkResult<PlayerContext> {
+        <LavalinkClient as DelegateMethods>::create_player_context_with_data(
+            &self.inner,
+            guild_id,
+            connection_info,
+            user_data,
+        )
+        .await
+    }
+
+    #[inline]
+    fn get_player_context(&self, guild_id: impl Into<LavalinkGuildId>) -> Option<PlayerContext> {
+        <LavalinkClient as DelegateMethods>::get_player_context(&self.inner, guild_id)
+    }
+}
+
 impl From<LavalinkClient> for Lavalink {
     fn from(value: LavalinkClient) -> Self {
         Self {
@@ -115,13 +167,13 @@ impl From<LavalinkClient> for Lavalink {
 type LavalinkGuildId = lavalink_rs::model::GuildId;
 
 pub trait DelegateMethods {
-    fn _handle_voice_server_update(
+    fn handle_voice_server_update(
         &self,
         guild_id: impl Into<LavalinkGuildId>,
         token: String,
         endpoint: Option<String>,
     );
-    fn _handle_voice_state_update(
+    fn handle_voice_state_update(
         &self,
         guild_id: impl Into<LavalinkGuildId>,
         channel_id: Option<impl Into<lavalink_rs::model::ChannelId>>,
@@ -131,11 +183,14 @@ pub trait DelegateMethods {
     fn process(&self, event: &twilight_gateway::Event) {
         match event {
             twilight_gateway::Event::VoiceServerUpdate(e) => {
-                self._handle_voice_server_update(e.guild_id, e.token.clone(), e.endpoint.clone());
+                self.handle_voice_server_update(e.guild_id, e.token.clone(), e.endpoint.clone());
             }
             twilight_gateway::Event::VoiceStateUpdate(e) => {
-                self._handle_voice_state_update(
-                    e.guild_id.expect("event received in a guild"),
+                self.handle_voice_state_update(
+                    // SAFETY: this bot cannot join DM voice calls,
+                    //         meaning all voice states will be from a guild voice channel,
+                    //         so `e.guild_id` is present
+                    unsafe { e.guild_id.unwrap_unchecked() },
                     e.channel_id,
                     e.user_id,
                     e.session_id.clone(),
@@ -145,52 +200,46 @@ pub trait DelegateMethods {
         }
     }
 
-    async fn _get_connection_info(
+    async fn get_connection_info(
         &self,
         guild_id: impl Into<LavalinkGuildId> + Send,
         timeout: std::time::Duration,
     ) -> LavalinkResult<ConnectionInfo>;
 
-    async fn _create_player_context_with_data<Data: std::any::Any + Send + Sync>(
+    async fn create_player_context_with_data<Data: std::any::Any + Send + Sync>(
         &self,
         guild_id: impl Into<LavalinkGuildId> + Send,
         connection_info: impl Into<ConnectionInfo> + Send,
         user_data: Arc<Data>,
     ) -> LavalinkResult<PlayerContext>;
-    async fn new_player_data(
+    async fn new_player(
         &self,
         guild_id: impl Into<LavalinkGuildId> + Send + Copy,
-    ) -> LavalinkResult<()> {
+    ) -> LavalinkResult<PlayerContext> {
         let now = tokio::time::Instant::now();
         let info = self
-            ._get_connection_info(
+            .get_connection_info(
                 guild_id,
-                *r#const::connection::GET_LAVALINK_CONNECTION_INFO_TIMEOUT,
+                *r#const::connection::get_lavalink_connection_info_timeout(),
             )
             .await?;
         tracing::trace!("getting lavalink connection info took {:?}", now.elapsed());
 
         let data = Arc::new(RwLock::new(PlayerData::new()));
-        self._create_player_context_with_data(guild_id, info, data)
+        let player = self
+            .create_player_context_with_data(guild_id, info, data)
             .await?;
 
-        Ok(())
+        Ok(player)
     }
 
-    fn _get_player_context(&self, guild_id: impl Into<LavalinkGuildId>) -> Option<PlayerContext>;
+    fn get_player_context(&self, guild_id: impl Into<LavalinkGuildId>) -> Option<PlayerContext>;
     fn get_player_data(
         &self,
         guild_id: impl Into<LavalinkGuildId> + Send,
     ) -> Option<PlayerDataRwLockArc> {
-        self._get_player_context(guild_id)
-            .map(|c| c.data().expect("data type is valid"))
-    }
-    fn player(&self, guild_id: impl Into<LavalinkGuildId> + Send) -> PlayerContext {
-        self._get_player_context(guild_id)
-            .expect("player context exists")
-    }
-    fn player_data(&self, guild_id: impl Into<LavalinkGuildId> + Send) -> PlayerDataRwLockArc {
-        self.player(guild_id).data().expect("data type is valid")
+        self.get_player_context(guild_id)
+            .map(|c| c.data_unwrapped())
     }
 }
 
@@ -199,14 +248,18 @@ impl Lavalink {
         self.inner.clone()
     }
 
+    pub fn new_connection_with(&self, guild_id: Id<GuildMarker>, connection: Connection) {
+        self.connections.insert(guild_id, connection);
+    }
+
     pub fn new_connection(
         &self,
         guild_id: Id<GuildMarker>,
         channel_id: Id<ChannelMarker>,
         text_channel_id: Id<ChannelMarker>,
     ) {
-        self.connections
-            .insert(guild_id, Connection::new(channel_id, text_channel_id));
+        let connection = Connection::new(channel_id, text_channel_id);
+        self.new_connection_with(guild_id, connection);
     }
 
     pub fn drop_connection(&self, guild_id: Id<GuildMarker>) {
@@ -217,37 +270,38 @@ impl Lavalink {
         self.connections.get(&guild_id)
     }
 
-    pub fn get_connection_mut(&self, guild_id: Id<GuildMarker>) -> Option<ConnectionRefMut> {
-        self.connections.get_mut(&guild_id)
-    }
-
-    pub fn connection(&self, guild_id: Id<GuildMarker>) -> ConnectionRef {
-        self.get_connection(guild_id).expect("connection exists")
+    pub fn connection_from(&self, from: &impl GetConnection) -> ConnectionRef {
+        // SAFETY: because the caller has an instance of `InVoice`,
+        //         this proves that there is a voice connection currently.
+        unsafe { self.connections.get(&from.guild_id()).unwrap_unchecked() }
     }
 
-    pub fn connection_mut(&self, guild_id: Id<GuildMarker>) -> ConnectionRefMut {
-        self.get_connection_mut(guild_id)
-            .expect("connection exists")
-    }
-
-    pub fn notify_connection_change(&self, guild_id: Id<GuildMarker>) {
-        self.connection(guild_id).notify_change();
+    pub fn connection_mut_from(&self, from: &impl GetConnection) -> ConnectionRefMut {
+        // SAFETY: because the caller has an instance of `InVoice`,
+        //         this proves that there is a voice connection currently.
+        unsafe {
+            self.connections
+                .get_mut(&from.guild_id())
+                .unwrap_unchecked()
+        }
     }
 
-    #[inline]
-    pub fn dispatch(&self, guild_id: Id<GuildMarker>, event: Event) {
-        self.connection(guild_id).dispatch(event);
+    pub fn get_connection_mut(&self, guild_id: Id<GuildMarker>) -> Option<ConnectionRefMut> {
+        self.connections.get_mut(&guild_id)
     }
 
     #[inline]
-    pub fn dispatch_queue_clear(&self, guild_id: Id<GuildMarker>) {
-        self.dispatch(guild_id, Event::QueueClear);
+    pub async fn delete_player(
+        &self,
+        guild_id: impl Into<lavalink_rs::prelude::GuildId> + Send,
+    ) -> LavalinkResult<()> {
+        self.inner.delete_player(guild_id).await
     }
 }
 
 impl DelegateMethods for LavalinkClient {
     #[inline]
-    fn _handle_voice_server_update(
+    fn handle_voice_server_update(
         &self,
         guild_id: impl Into<LavalinkGuildId>,
         token: String,
@@ -257,7 +311,7 @@ impl DelegateMethods for LavalinkClient {
     }
 
     #[inline]
-    fn _handle_voice_state_update(
+    fn handle_voice_state_update(
         &self,
         guild_id: impl Into<LavalinkGuildId>,
         channel_id: Option<impl Into<lavalink_rs::model::ChannelId>>,
@@ -268,7 +322,7 @@ impl DelegateMethods for LavalinkClient {
     }
 
     #[inline]
-    async fn _get_connection_info(
+    async fn get_connection_info(
         &self,
         guild_id: impl Into<LavalinkGuildId> + Send,
         timeout: std::time::Duration,
@@ -277,7 +331,7 @@ impl DelegateMethods for LavalinkClient {
     }
 
     #[inline]
-    async fn _create_player_context_with_data<Data: std::any::Any + Send + Sync>(
+    async fn create_player_context_with_data<Data: std::any::Any + Send + Sync>(
         &self,
         guild_id: impl Into<LavalinkGuildId> + Send,
         connection_info: impl Into<ConnectionInfo> + Send,
@@ -288,15 +342,41 @@ impl DelegateMethods for LavalinkClient {
     }
 
     #[inline]
-    fn _get_player_context(&self, guild_id: impl Into<LavalinkGuildId>) -> Option<PlayerContext> {
+    fn get_player_context(&self, guild_id: impl Into<LavalinkGuildId>) -> Option<PlayerContext> {
         self.get_player_context(guild_id)
     }
 }
 
-impl Deref for Lavalink {
-    type Target = LavalinkClient;
+pub trait UnwrappedPlayerData {
+    fn data_unwrapped(&self) -> PlayerDataRwLockArc;
+}
+
+impl UnwrappedPlayerData for PlayerContext {
+    fn data_unwrapped(&self) -> PlayerDataRwLockArc {
+        // SAFETY: Player data exists of type `Arc<RwLock<PlayerData>>`
+        unsafe { self.data().unwrap_unchecked() }
+    }
+}
+
+pub trait UnwrappedPlayerInfoUri {
+    fn into_uri_unwrapped(self) -> String;
+    fn uri_unwrapped(&self) -> &str;
+}
 
-    fn deref(&self) -> &Self::Target {
-        &self.inner
+impl UnwrappedPlayerInfoUri for TrackInfo {
+    fn uri_unwrapped(&self) -> &str {
+        self.uri
+            .as_ref()
+            .unwrap_or_else(|| panic!("local tracks are unsupported"))
+    }
+
+    fn into_uri_unwrapped(self) -> String {
+        self.uri
+            .unwrap_or_else(|| panic!("local tracks are unsupported"))
     }
 }
+
+pub trait GetConnection: GuildIdAware {}
+
+impl GetConnection for InVoice<'_> {}
+impl GetConnection for CachelessInVoice {}
diff --git a/lyra/src/bot/lavalink/model/connection.rs b/lyra/src/bot/lavalink/model/connection.rs
index 24b5ddc..8bc64dd 100644
--- a/lyra/src/bot/lavalink/model/connection.rs
+++ b/lyra/src/bot/lavalink/model/connection.rs
@@ -21,7 +21,7 @@ pub(super) type ConnectionRefMut<'a> =
     dashmap::mapref::one::RefMut<'a, Id<GuildMarker>, Connection>;
 
 impl Connection {
-    pub(super) fn new(channel_id: Id<ChannelMarker>, text_channel_id: Id<ChannelMarker>) -> Self {
+    pub fn new(channel_id: Id<ChannelMarker>, text_channel_id: Id<ChannelMarker>) -> Self {
         Self {
             channel_id,
             text_channel_id,
@@ -34,7 +34,7 @@ impl Connection {
 
     pub async fn changed(&self) -> bool {
         tokio::time::timeout(
-            *r#const::connection::CONNECTION_CHANGED_TIMEOUT,
+            *r#const::connection::connection_changed_timeout(),
             self.change.notified(),
         )
         .await
@@ -57,7 +57,7 @@ impl Connection {
         let _ = self.event_sender.send(event);
     }
 
-    pub(super) fn notify_change(&self) {
+    pub fn notify_change(&self) {
         tracing::trace!("notified connection change");
         self.change.notify_one();
     }
@@ -99,7 +99,7 @@ pub async fn wait_for_with(
     rx: &mut broadcast::Receiver<Event>,
     predicate: impl Fn(&Event) -> bool + Send + Sync,
 ) -> EventRecvResult<Option<Event>> {
-    let event = tokio::time::timeout(*r#const::misc::WAIT_FOR_BOT_EVENTS_TIMEOUT, async {
+    let event = tokio::time::timeout(*r#const::misc::wait_for_bot_events_timeout(), async {
         loop {
             let event = rx.recv().await?;
             if predicate(&event) {
@@ -107,5 +107,6 @@ pub async fn wait_for_with(
             }
         }
     });
+
     Ok(event.await.transpose()?.ok())
 }
diff --git a/lyra/src/bot/lavalink/model/queue.rs b/lyra/src/bot/lavalink/model/queue.rs
index 9ee60ee..d638a2a 100644
--- a/lyra/src/bot/lavalink/model/queue.rs
+++ b/lyra/src/bot/lavalink/model/queue.rs
@@ -7,17 +7,11 @@ use std::{
 use futures::Future;
 use lavalink_rs::{model::track::TrackData, player_context::PlayerContext};
 use rayon::iter::{IntoParallelIterator, ParallelExtend, ParallelIterator};
-use twilight_model::id::{
-    marker::{GuildMarker, UserMarker},
-    Id,
-};
+use twilight_model::id::{marker::UserMarker, Id};
 
 use crate::bot::error::component::queue::remove::WithAdvanceLockAndStoppedError;
 
-use super::{
-    queue_indexer::{IndexerType, QueueIndexer},
-    DelegateMethods, Lavalink,
-};
+use super::queue_indexer::{IndexerType, QueueIndexer};
 
 #[derive(Hash, Copy, Clone)]
 pub enum RepeatMode {
@@ -53,7 +47,7 @@ impl RepeatMode {
 
 impl std::fmt::Display for RepeatMode {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", self.description())
+        f.write_str(self.description())
     }
 }
 
@@ -90,20 +84,6 @@ pub struct Queue {
     current_track_started: u64,
 }
 
-impl std::ops::Deref for Queue {
-    type Target = VecDeque<Item>;
-
-    fn deref(&self) -> &Self::Target {
-        &self.inner
-    }
-}
-
-impl std::ops::DerefMut for Queue {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.inner
-    }
-}
-
 impl Queue {
     pub(super) const fn new() -> Self {
         Self {
@@ -118,7 +98,8 @@ impl Queue {
 
     pub fn position(&self) -> NonZeroUsize {
         let d = usize::from(self.current().is_some() || self.index == 0);
-        NonZeroUsize::new(self.index + d).expect("self.index + d is non-zero")
+        // SAFETY: `self.index + d` is non-zero
+        unsafe { NonZeroUsize::new_unchecked(self.index + d) }
     }
 
     pub const fn index(&self) -> &usize {
@@ -258,26 +239,58 @@ impl Queue {
 
     pub async fn stop_with_advance_lock(
         &self,
-        guild_id: Id<GuildMarker>,
-        lavalink: &Lavalink,
+        player: &PlayerContext,
     ) -> Result<(), WithAdvanceLockAndStoppedError> {
-        self.with_advance_lock_and_stopped(guild_id, lavalink, |_| async { Ok(()) })
+        self.with_advance_lock_and_stopped(player, |_| async { Ok(()) })
             .await
     }
 
-    pub async fn with_advance_lock_and_stopped<
-        F: Future<Output = Result<(), WithAdvanceLockAndStoppedError>> + Send,
-    >(
+    pub async fn with_advance_lock_and_stopped<'a, 'b, F>(
         &self,
-        guild_id: Id<GuildMarker>,
-        lavalink: &Lavalink,
-        f: impl FnOnce(PlayerContext) -> F + Send,
-    ) -> Result<(), WithAdvanceLockAndStoppedError> {
+        player: &'a PlayerContext,
+        f: impl FnOnce(&'b PlayerContext) -> F + Send,
+    ) -> Result<(), WithAdvanceLockAndStoppedError>
+    where
+        F: Future<Output = Result<(), WithAdvanceLockAndStoppedError>> + Send,
+        'a: 'b,
+    {
         self.advance_lock();
 
-        let player = lavalink.player(guild_id);
         player.stop_now().await?;
         f(player).await?;
         Ok(())
     }
+
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.inner.is_empty()
+    }
+
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.inner.len()
+    }
+
+    #[inline]
+    pub fn remove(&mut self, index: usize) -> Option<Item> {
+        self.inner.remove(index)
+    }
+
+    #[inline]
+    pub fn iter(&self) -> std::collections::vec_deque::Iter<'_, Item> {
+        self.inner.iter()
+    }
+
+    #[inline]
+    pub fn insert(&mut self, index: usize, value: Item) {
+        self.inner.insert(index, value);
+    }
+}
+
+impl std::ops::Index<usize> for Queue {
+    type Output = Item;
+
+    fn index(&self, index: usize) -> &Self::Output {
+        &self.inner[index]
+    }
 }
diff --git a/lyra/src/bot/lavalink/plugin.rs b/lyra/src/bot/lavalink/plugin.rs
index e8656f1..36c260a 100644
--- a/lyra/src/bot/lavalink/plugin.rs
+++ b/lyra/src/bot/lavalink/plugin.rs
@@ -1,4 +1,2 @@
 mod lava_search;
 mod lava_src;
-
-pub use lava_src::PluginInfo;
diff --git a/lyra/src/bot/lavalink/track.rs b/lyra/src/bot/lavalink/track.rs
index 94f4885..a785a49 100644
--- a/lyra/src/bot/lavalink/track.rs
+++ b/lyra/src/bot/lavalink/track.rs
@@ -6,7 +6,7 @@ use lavalink_rs::{
 
 use crate::bot::{
     error::lavalink::ProcessResult,
-    lavalink::{model::CorrectTrackInfo, DelegateMethods},
+    lavalink::{model::CorrectTrackInfo, UnwrappedPlayerData},
 };
 
 // FIXME: don't debug `LavalinkClient` until `lavalink_rs` stops stack overflowing
@@ -31,11 +31,12 @@ async fn impl_end(lavalink: LavalinkClient, event: &TrackEnd) -> ProcessResult {
         event.track.info.checked_title()
     );
 
-    let Some(data) = lavalink.get_player_data(guild_id) else {
+    let Some(player) = lavalink.get_player_context(guild_id) else {
         tracing::trace!(?guild_id, "track ended via forced disconnection");
 
         return Ok(());
     };
+    let data = player.data_unwrapped();
     let data_r = data.read().await;
     let queue = data_r.queue();
 
@@ -44,13 +45,12 @@ async fn impl_end(lavalink: LavalinkClient, event: &TrackEnd) -> ProcessResult {
         queue.advance_unlock();
     } else {
         drop(data_r);
-        let data = lavalink.player_data(guild_id);
         let mut data_w = data.write().await;
         let queue = data_w.queue_mut();
 
         queue.advance();
         if let Some(item) = queue.current() {
-            lavalink.player(guild_id).play_now(item.track()).await?;
+            player.play_now(item.track()).await?;
         }
     }
 
diff --git a/lyra/src/bot/runner.rs b/lyra/src/bot/runner.rs
index fd64ab1..15f4c79 100644
--- a/lyra/src/bot/runner.rs
+++ b/lyra/src/bot/runner.rs
@@ -29,7 +29,7 @@ use twilight_model::{
     id::{marker::UserMarker, Id},
 };
 
-use crate::bot::core::r#const::metadata::BANNER;
+use crate::bot::core::r#const::metadata::banner;
 
 use super::{
     core::{
@@ -62,17 +62,20 @@ fn build_http_client() -> Client {
 fn build_shard_config() -> ShardConfig {
     ConfigBuilder::new(CONFIG.token.to_owned(), INTENTS)
         .presence(
-            UpdatePresencePayload::new(
-                [Activity::from(MinimalActivity {
-                    kind: ActivityType::Listening,
-                    name: "/play".into(),
-                    url: None,
-                })],
-                false,
-                None,
-                Status::Online,
-            )
-            .expect("activities is non-empty"),
+            // SAFETY: provided non-empty set of activities
+            unsafe {
+                UpdatePresencePayload::new(
+                    [Activity::from(MinimalActivity {
+                        kind: ActivityType::Listening,
+                        name: "/play".into(),
+                        url: None,
+                    })],
+                    false,
+                    None,
+                    Status::Online,
+                )
+                .unwrap_unchecked()
+            },
         )
         .build()
 }
@@ -104,7 +107,7 @@ pub(super) async fn start() -> Result<(), StartError> {
         tasks.push(tokio::spawn(handle_gateway_events(shard, bot.clone())));
     }
 
-    println!("{}", *BANNER);
+    println!("{}", banner());
     Ok(wait_until_shutdown(senders, tasks).await?)
 }
 
diff --git a/lyra_proc/Cargo.toml b/lyra_proc/Cargo.toml
index 7cc3806..65d82a2 100644
--- a/lyra_proc/Cargo.toml
+++ b/lyra_proc/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "lyra_proc"
-version = "0.6.0"
+version = "0.7.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
diff --git a/lyra_proc/src/config_access.rs b/lyra_proc/src/config_access.rs
index 1aaad26..bc19cfe 100644
--- a/lyra_proc/src/config_access.rs
+++ b/lyra_proc/src/config_access.rs
@@ -6,7 +6,7 @@ use syn::Ident;
 
 use crate::model::Args;
 
-pub fn impl_view_access_ids(categories: &Args) -> TokenStream {
+pub fn impl_view_access_ids(Args(categories): &Args) -> TokenStream {
     let column_names = categories
         .iter()
         .map(|c| match c.to_string().as_str() {
diff --git a/lyra_proc/src/model.rs b/lyra_proc/src/model.rs
index e00d39b..df4e729 100644
--- a/lyra_proc/src/model.rs
+++ b/lyra_proc/src/model.rs
@@ -1,5 +1,3 @@
-use std::ops::Deref;
-
 use syn::{
     parse::{Parse, ParseStream},
     punctuated::Punctuated,
@@ -14,10 +12,3 @@ impl Parse for Args {
         Ok(Self(vars.into_iter().collect()))
     }
 }
-
-impl Deref for Args {
-    type Target = Vec<Ident>;
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}