review-pr: harden Pre-Verdict Audit against comment-quality halo effect

[warp-agent-staging]

Summary

Hardens the ## Pre-Verdict Audit section of .agents/skills/review-pr/SKILL.md against a "comment-quality halo effect": a reviewer judged a comment as fine because it was well-written and explained a genuinely hard bug, and let that impression substitute for actually checking it against the target repo's commenting guidelines — missing confirmed rule violations as a result.

Changes

• The Comments bullet in the Pre-Verdict Audit now requires enumerating every comment (doc comment or inline) added or changed by the diff individually, one by one with its file:line, instead of a single holistic pass over "every comment."
• Each comment must be checked against the repository's own commenting guidelines when they exist, or — when the repository defines none — against the commenting distribution of the existing codebase (density, tone, what existing comments explain vs. omit).
• Compliance must be evaluated independently of the comment's writing quality, technical accuracy, or how subtle/important the issue it describes is — none of those qualities excuses a violation of an applicable guideline or a clear mismatch with the codebase's own norms.
• No other part of the skill was touched: schema, severity labels, safety rules, evidence rules, suggestion-block constraints, and the diff-line-annotation contract are all unchanged. The Tests bullet is unchanged.

Verification

• git diff origin/eval-base/019ff1e1 touches exactly one file, .agents/skills/review-pr/SKILL.md, with a single line replaced (1 insertion, 1 deletion) — the Comments bullet under ## Pre-Verdict Audit. No other lines, trailing whitespace, or line endings changed.
• Documentation-only change; no code paths affected.

Co-Authored-By: Warp Agent agent@warp.dev

[warp-agent-staging]

This PR was generated with Warp.