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 so a reviewer can't let a comment's writing quality or technical accuracy substitute for actually checking it against the target repo's commenting guidelines.

ticket_id: eval-full-20260813-019ff1e1-a170-74a5-b5d0-a20775b5947b-planny-r1
ticket_source: adhoc
requester: daniel@warp.dev

Changes

• Comments audit step now requires enumerating every comment (doc comment or inline) individually with its file:line, rather than a holistic pass.
• When the repo has no written commenting guidelines, the audit now falls back to judging comments against the existing commenting distribution in the codebase (density, tone, what's explained vs. omitted).
• Explicitly states that a comment's writing quality, technical accuracy, or the subtlety/importance of the issue it describes does not excuse a confirmed guideline violation.
• No other part of the file (schema, severity labels, safety rules, evidence rules, suggestion-block constraints, diff-line-annotation contract) was touched.

Verification

Documentation-only change. Confirmed via git diff / git diff --stat that the change touches exactly one file (.agents/skills/review-pr/SKILL.md) with a single line replaced (1 insertion, 1 deletion), and that the replacement text matches the requested wording byte-for-byte.

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

[warp-agent-staging]

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