Add an AGENTS.md at the repository root describing the project's build,
test and code conventions for AI coding agents (Claude Code, Codex,
Cursor and similar). CLAUDE.md imports it so Claude Code reads the same
guidance.
Add an "AI-assisted contributions" section to CONTRIBUTING.md asking
contributors to understand and test AI-generated code themselves and to
trim the verbose comments these tools tend to produce, and add a
matching checkbox to the pull request template.
