# Contributing

1. Fork the repository.
2. Create a topic branch.
3. Make focused changes with tests.
4. Ensure `cmake --build build -j` and `ctest --test-dir build -V` pass.
5. Submit a pull request with a clear description.

Code style: C++20, explicit ownership, no warnings in Release.

See also: README.md, INSTALL.md, CLI.md, PLAN.md, REGISTRY.md, AGENTS.md, skills/versiond-admin/SKILL.md.