Agent skill

conventional-comments

Format code review comments using Conventional Comments labels and decorations. Use when writing inline review comments on a PR diff. Not for creating PRs — use pr for that. Not for complexity analysis — use code-critic for that.

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Install this agent skill to your Project

npx add-skill https://github.com/hairihou/dotfiles/tree/main/src/.config/claude/skills/conventional-comments

SKILL.md

Conventional Comments

Workflow

  1. Read the full diff before writing any comments.
  2. Identify blocking issues (issue!, suggestion!) first — these gate approval.
  3. Add non-blocking feedback (suggestion, todo, question, note) after.

Format

<label>[!] [(decorations)]: <subject>

[discussion]
Part Required Description
label Yes Comment type (see labels below)
! No Blocking indicator—must resolve before approval
(decoration) No Comma-separated context tags (e.g., (security))
subject Yes Main message (1 line)
discussion No Additional reasoning or suggested fix (1-3 lines)

Labels

Label Description When to use
issue Identifies a problem that needs to be addressed. Bugs, logic errors, broken contracts. Will cause failures if left.
suggestion Proposes an improvement with an explicit change. Better approaches exist. Always include the concrete alternative.
todo Small, necessary change. Less severe than an issue. Missing null checks, missing edge cases, incomplete cleanup.
question Seeks clarification or investigation. Intent is unclear from the code alone. Not rhetorical.
note Information for the reader. Does not require action. Related code elsewhere, upcoming changes, context the author lacks.
typo Points out a typographical error. Misspelled identifiers, comments, or strings.

Do NOT use: praise, nitpick, quibble — focus on actionable feedback only.

Label boundaries

  • issue vs. todo: issue breaks correctness or contracts. todo is a gap that should be closed but is not immediately harmful.
  • suggestion vs. todo: suggestion offers a better approach (include the alternative). todo points out something missing (no alternative needed).
  • question vs. note: question expects a response. note does not.

Anti-patterns

  • Restating the diff. "This adds a new function" — the reviewer can see that. State the consequence or concern instead.
  • Suggestion without alternative. "This could be improved" — how? Always include the concrete change.
  • Rhetorical question. "Do we really need this?" — if you know the answer, use suggestion or issue instead.
  • Commenting on the obvious. If the code is self-explanatory and correct, no comment is needed. Silence is a valid review output.

Decorations

Decoration Use when
(a11y) Comment relates to accessibility.
(performance) Comment relates to performance impact.
(security) Comment relates to security vulnerabilities.
(ux) Comment relates to user experience.

Examples

Basic suggestion

suggestion: Consider using optional chaining here.

`user && user.profile && user.profile.name` can be simplified to `user?.profile?.name`.

Blocking issue

issue!: This function silently swallows exceptions.

Either log the error or propagate it to the caller.

With security decoration

suggestion! (security): User input should not be directly embedded in SQL.

Use prepared statements to prevent SQL injection.

With performance decoration

issue (performance): This query runs inside a loop causing N+1 problem.

Batch the IDs and fetch all records in a single query.

Simple todo

todo: Add null check before accessing `user.email`.

Question

question: Is this timeout value intentional?

300ms seems short for API calls that may span regions.

Note (informational)

note: This pattern is also used in `auth-service.ts:45`.

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