<Skill Name>
Free<What this skill does>
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s977043/river-review7Updated Oct 24, 2026
FreePublished on GitHub
i18n Unused Key Review
Detect i18n/locale keys that are removed from source but remain in locale files, or keys added to locale files without source usage.
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Run score Not tested
See how to installFiles included (5)
- SKILL.md2.2 KB
- fixtures/01-removed-component-key-left-behind.md1.3 KB
- fixtures/01-should-detect.md1.1 KB
- fixtures/02-dynamic-key-false-positive.md1.5 KB
- fixtures/02-should-not-detect.md871 B
SKILL.md (original)
Review the instructions the agent will receive before you install.
Pattern declaration
Primary pattern: Reviewer Secondary patterns: Inversion Why: i18n key管理はdiff単体では判断が難しく、ファイル全体とソース参照の両方を踏まえる必要がある
Guidance
- Check if translation keys deleted from source code (e.g.,
t('key'),i18n.t('key'),$t('key')) still exist in locale JSON files — report as unused key. - Check if new keys added to locale JSON files are referenced in source code — report as potentially orphaned key.
- Look for patterns like
t('user.profile.name'),i18n('common.cancel'),formatMessage({ id: 'key' }). - When source file is deleted entirely, flag all its keys in locale files as candidates for removal.
Non-goals
- 動的に構築されるkey（テンプレートリテラルやconcat）は誤検知になりやすいため指摘しない。
- 外部ライブラリのkey（third-party component内部のi18n keyなど）は対象外。
Pre-execution Gate / 実行前ゲート
このスキルは以下の条件がすべて満たされない限りNO_REVIEWを返す。
- 差分にi18n/locale関連ファイル（*.json, /i18n/, /locales/）の変更が含まれている
- または差分にUI文言を削除・変更するソースコードの変更が含まれている
ゲート不成立時の出力: NO_REVIEW: i18n-unused-key — i18n/locale関連の変更が検出されない
False-positive guards
- keyがワイルドカードや動的参照で使用されている可能性がある場合は黙る。
- テスト用フィクスチャやstorybook内のkey定義は対象外。
- 同一PR内で追加と削除が対になっている（リネーム）場合は指摘しない。
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