diff --git a/README.md b/README.md
index eb51260..578cb9a 100644
--- a/README.md
+++ b/README.md
@@ -318,7 +318,9 @@ dynamically scoped `fix` and `json` behavior.
 | Ruby | `rubocop` layout autocorrect | `rubocop` |
 | HTML | `superhtml fmt` | `superhtml check` |
 | TOML | `taplo` | `taplo` |
-| JSON/JSONC/CSS/JS/JSX/TS/TSX | `biome` | `biome` |
+| JSON/JSONC/CSS/SCSS/LESS/JS/JSX/TS/TSX | `biome` | `biome` |
+| Nix | `nixfmt` | `statix` |
+| Protobuf | `buf format` | `buf lint` |
 | YAML | `yamlfmt` | - |
 | GitHub Actions | `yamlfmt` | `actionlint` + `zizmor` |
 | Markdown | `rumdl` | `rumdl` |
diff --git a/lib/checkrun/autoformat.sh b/lib/checkrun/autoformat.sh
index 1be2edf..80b4daa 100644
--- a/lib/checkrun/autoformat.sh
+++ b/lib/checkrun/autoformat.sh
@@ -29,12 +29,14 @@ _autoformat_usage() {
     "  Go:        .go" \
     "  Java:      .java" \
     "  Lua:       .lua" \
+    "  Nix:       .nix" \
     "  PHP:       .php" \
+    "  Protobuf:  .proto" \
     "  Python:    .py" \
     "  Ruby:      .rb" \
     "  Rust:      .rs" \
     "  Shell:     .sh, .bash, .zsh, extensionless files with a shell shebang, .bashrc, .zshrc, .profile, .envrc" \
-    "  Web/data:  .css, .js, .jsx, .ts, .tsx, .json, .jsonc, .html, .htm" \
+    "  Web/data:  .css, .scss, .less, .js, .jsx, .ts, .tsx, .json, .jsonc, .html, .htm" \
     "" \
     "Options:" \
     "  -h, --help  Show this help and exit."
diff --git a/lib/checkrun/autolint.sh b/lib/checkrun/autolint.sh
index 2062b6a..2339fa7 100644
--- a/lib/checkrun/autolint.sh
+++ b/lib/checkrun/autolint.sh
@@ -69,13 +69,15 @@ _autolint_usage() {
     "  Go:        .go" \
     "  Java:      .java" \
     "  Lua:       .lua" \
+    "  Nix:       .nix" \
     "  PHP:       .php" \
+    "  Protobuf:  .proto" \
     "  Python:    .py" \
     "  Ruby:      .rb" \
     "  Rust:      .rs" \
     "  Shell:     .sh, .bash, .zsh, extensionless files with a shell shebang, .bashrc, .zshrc, .envrc" \
     "  Systemd:   .automount, .device, .mount, .path, .scope, .service, .slice, .socket, .swap, .target, .timer" \
-    "  Web/data:  .css, .js, .jsx, .ts, .tsx, .json, .jsonc, .html, .htm" \
+    "  Web/data:  .css, .scss, .less, .js, .jsx, .ts, .tsx, .json, .jsonc, .html, .htm" \
     "" \
     "Options:" \
     "  --fix       Apply safe linter fixes where supported." \