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Do not discard a function's final value with return (), pure (), or void; adjust the type to return the value and let the caller discard it when unneeded. Use when writing or reviewing Haskell functions that return unit or discard results.
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
SOC 직업 분류 기준
Generate a commit message from staged changes and let the user review before committing. Use when the user wants to commit changes or create a git commit.
Generate a GitHub pull request title and body from the current branch and let the user review before creation. Use when the user wants to create a pull request.
Investigate any topic by querying multiple external sources (web, official docs, GitHub, MCP servers). Use whenever a question requires information not already in the working context, including library behavior, API specifications, error diagnostics, version comparisons, or general factual lookup.
himari is ncaq's rio-like custom Haskell Prelude. Import it with a single `import Himari`, never `import Himari.Prelude` or other submodules directly. Use when writing or reviewing Haskell code in a project that depends on the himari package.
Prefer the most specific built-in method over general-purpose ones in TypeScript/JavaScript. Use includes over indexOf, some over filter().length, find over filter()[0], flatMap over map().flat(), at(-1) over length-based access, startsWith/endsWith/includes over indexOf on strings, structuredClone over JSON round-trip. Use when writing or reviewing code that searches, tests, transforms arrays, objects, or strings.
Avoid for loops (C-style, for...of, for...in) in TypeScript/JavaScript. Prefer higher-order Array methods like map, filter, find, some, every, reduce. Use when writing or reviewing loops or iteration over arrays, objects, Map, Set, or String.
| name | function-result |
| description | Do not discard a function's final value with return (), pure (), or void; adjust the type to return the value and let the caller discard it when unneeded. Use when writing or reviewing Haskell functions that return unit or discard results. |
| user-invocable | false |
関数の最後で、
return ()pure ()voidなどを使って値を捨てないでください。
特に理由がないならば関数が値を返すように型の方を合わせてください。
その時その関数の返り値が別に必要ない場合でも、 呼び出し側で捨てれば多くは問題ない話です。 呼び出し側で捨てる手間は非常に少ないです。
必要になった場合に使える余地を残しておいたほうが後々必要になった時に大きく書き換えなくて済みます。
関数の最後がwriteFileのような、
MonadIO m => m ()のようにユニットを返す関数であれば、
自然とそのまま返り値をMonadIO m => m ()にして問題ありません。
ちょっとした補助関数を最後に呼び出して、 それの返り値を返してしまうと、 関数全体の挙動が誤解されてしまうような場合のみ、 最後の値を捨てることを検討してください。