- CONTRIBUTING.md: dev-branch workflow, uv setup, test/lint commands - SECURITY.md: private disclosure to holden@arch.fyi - .github/ISSUE_TEMPLATE/bug_report.yml: structured form with image tag, versions, logs - .github/ISSUE_TEMPLATE/feature_request.yml: problem/solution/alternatives form - .github/PULL_REQUEST_TEMPLATE.md: checklist enforcing dev branch + passing CI - pyproject.toml: add Changelog and Documentation URLs Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>