Create docs/CONTRIBUTING.md (build/verify workflow, coding style, kernel
gotchas, commit & PR conventions), docs/SECURITY.md (supported versions,
private vulnerability reporting, documented caveats), and docs/ROADMAP.md
(shipped in v1.0.0 plus near/mid/long-term plans). Add a Documentation and
Contributing section to the README pointing at all four docs.
Note: used the conventional CONTRIBUTING.md / SECURITY.md filenames (in
docs/) so GitHub auto-detects them as community-health files.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
