PR Review Summarizer

When to invoke

• "Summarize this PR for me before I review."
• "What's the risk in this diff?"
• "Generate reviewer questions for PR #482."

Inputs needed

1. Diff source — local unified diff file, GitHub PR URL, or GitLab MR URL.
2. Context (optional) — service name, runtime, test framework.

Workflow

1. Fetch / read the diff.
2. Classify changes: code, tests, docs, config, dependencies.
3. Score risk per file using heuristics: lines changed, security-sensitive paths, lack of tests, schema changes.
4. Summarize intent in plain language.
5. Produce a review brief: TL;DR, risk hotspots, missing test coverage, suggested questions.