PR Review — Stateful Reviewer with Verdict Comment

Review a GitHub pull request end-to-end and post a single verdict comment. Respects the aif convention: loads project context (RULES.md, CHECKLIST.md, config.yaml), applies context gates, stays read-only on .ai-factory/*, and writes only one artifact — the PR comment.

Core focus:

1. Code cleanliness — no debug markers, no TODO/FIXME leaks, no dead code, no unreachable branches.
2. Duplication — DRY violations, N+1 patterns, repeated blocks that should be extracted or hoisted.
3. Docs sync — when code changes, the matching docs (README, docs/**, sync rules from CLAUDE.md) change too.

Not a lint replacement. Assume CI covers formatting, type errors, and compile failures. Focus on judgment-level findings that humans otherwise miss on review.

Step 0: Load Context