#skip-bb

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## Summary by cubic
Adds a multi-agent PR review skill that runs three independent reviewers
with randomized file order, aggregates issues by consensus, and posts a
summary plus inline PR comments for medium+ issues flagged by 2+ agents.
Improves correctness coverage and reduces ordering bias.

- **New Features**
- Orchestrator parses PR diffs, shuffles file order per agent, runs
reviews in parallel (optional extended thinking), and writes consensus
results and formatted comments.
- Aggregation script performs consensus voting across agent outputs with
severity filtering.
- Comment poster posts the consensus summary and inline comments via
GitHub CLI or API; supports --dry-run and --summary-only.
  - Prompt and JSON schema references for structured issue output.
  - Skill docs covering workflow, configuration, and usage.

- **Bug Fixes**
- Align prompt schema fields (line_start, severity) with orchestrator
expectations.
- Make line tolerance symmetric and clamp to positive line numbers in
issue matching.
  - Warn when diff filename parsing fails.

<sup>Written for commit e32332eb80083ea4f61617811d345f92453cdf3e.
Summary will update on new commits.</sup>

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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>