Dogfood git-mind suggest action with Claude CLI

[flyingrobots]

Summary

Wire up git-mind suggest to run automatically on PRs in this repo, using Claude CLI as the agent. This dogfoods the composite action (action.yml) and the existing review workflow (.github/workflows/gitmind-review.yml).

Tasks

• Create .github/workflows/gitmind-suggest.yml triggered on PR events
• Use claude -p --output-format json as the agent
• Guard against drafts, bots, missing API key
• continue-on-error: true so suggest failures don't block merge
• Full git history (fetch-depth: 0) for context extraction
• Concurrency control to cancel superseded runs

Acceptance Criteria

• Workflow triggers on PR open/sync/reopen/ready_for_review
• Claude CLI produces suggestions and posts comment on PR
• /gitmind accept N / /gitmind reject N work via existing review workflow
• Suggest failures are non-blocking