feat: add review-loop command for autonomous PR review cycles

[potb]

Summary

Adds a new /review-loop builtin command that runs autonomous PR review cycles with parallel review agents, automatic issue verification, and auto-fix capabilities.

Implementation

• Hook System: New review-loop hook following ralph-loop patterns
• State Persistence: Frontmatter YAML with target_branch and pr_files for scope enforcement
• Parallel Review: 4 agents review simultaneously, findings aggregated
• Smart Verification: Critical/high issues and non-consensus findings double-checked
• Auto-Fix Loop: Fixes confirmed issues, commits, pushes, re-reviews until clean
• Max Iterations: Default 10 iterations with safety stop

Files Changed

Created (6 files, ~1410 lines):

• src/hooks/review-loop/ - Hook implementation with types, constants, storage, tests
• src/features/builtin-commands/templates/review-loop.ts - 9-step review loop template

Modified (5 files):

• Config schema, command registration, hook integration

Testing

• ✅ 28 new tests (13 storage + 15 hook)
• ✅ 76 expect() calls
• ✅ All tests pass (2177/2187, 10 pre-existing flaky)
• ✅ Zero regressions
• ✅ Typecheck clean
• ✅ Build succeeds

Verification

bun test src/hooks/review-loop/  # 28/28 pass
bun run typecheck                 # exit 0
bun run build                     # exit 0

Usage

/review-loop main  # Review current branch against main
/stop-continuation # Cancel active review loop

Commits

1. feat(review-loop): add types and constants
2. feat(review-loop): add storage layer with tests
3. feat(review-loop): add command template
4. feat(review-loop): add config schema and command registration
5. feat(review-loop): implement review-loop hook with tests
6. feat(review-loop): integrate hook in plugin lifecycle

---

Summary by cubic

Adds a new /review-loop command and hook to run autonomous PR review cycles with parallel reviewers and automatic continuation until no CRITICAL/HIGH issues remain. Merges the latest dev branch and restores a lost managers initialization.

• New Features

  • Built-in /review-loop with template and [target-branch] arg; loops until clean or max 10 iterations.
  • review_loop config (enabled, default_max_iterations, state_dir); state saved to .sisyphus/review-loop.local.md.
  • Hook export and continuation prompt include target branch and PR files; completion detected via transcript or session messages.

• Bug Fixes

  • Restored createManagers call in plugin init after a merge conflict to ensure managers are properly set up.

^{Written for commit 939f63c. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 11 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.