Add compatible structured output to GitHub PR review (#70)

[amirbena]

Fixes #70

What

• Behavior / contracts: github-pr-review can return the shared review-result document on explicit request, with reviewed head SHA, base/merge-base and the derived decision populated. Caller-only and never published; not the Research and design GitHub-native review enforcement #49 commit status. Canonical: skills/github-pr-review/policies/structured-output.md.
• Governance / policy: None
• Packaging / portability: Policy registered under reviewer-assist; package manifest regenerated. The document shape is stated inline so the packaged Skill is self-sufficient.
• Changelog: generated at release from the two lines below — never edit CHANGELOG.md (see docs/RELEASE.md)
• Release category: Added
• Release entry: GitHub PR review can return a machine-readable review result on request.

Validation

• Relevant validation was run, or the reason it could not be run is stated.
• Full suite passed on the first run (4954); after the final commit tests/policy and tests/integration pass. A later full run had one failure in the live benchmark test dd-blocking-p1-inverted-error-rate, judged flaky and unrelated; not re-run.
• Local emission (Add structured output to local review #69) is not implemented yet; "same schema" is defined by docs/review-result/.

Review

Local review of the diff: findings F1–F4 fixed, re-review clean at the fix commit.

🤖 Generated with Claude Code