Code Review — Multi-Agent PR Review

User-invokable orchestrator for code-PR review across any repo: Copilot for line-level findings, parallel subagents for the architectural and operational misses line-level review can't see. (Validation evidence and origin story: README.)

Fallbacks: no gh or not a GitHub repo → review the local diff (git diff <base>...HEAD) and skip the Copilot lane entirely; no subagent tool → run the review angles sequentially in the main thread. Detect what's available before assuming Copilot access.

Invocation: deliberately model-invocable — "review this PR" phrasing is the trigger. Pushes and issue-creation inside the flow are confirmation-gated.

Step 1: Assess PR Scope

The review target is $ARGUMENTS (a PR number, branch, or URL). If empty, infer it from the conversation or ask.

gh pr view N --json files,additions,deletions,title

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