- Never assume, verify before claiming
- Use `make help` to find available development targets
- PR descriptions: minimal, only what and why, no task lists or file listings
- Reference issues and PRs by full URL, not by number
- Use Conventional Commits for commit messages and PR titles, e.g. `type(scope): subject`; `!` before the colon if breaking. Use `test` type for test-only changes.
- Add an `Assisted-by: AGENT_NAME:MODEL_VERSION` trailer to commit messages, never `Co-Authored-By` or `Signed-off-by`
- Attribute agent authorship on one trailing line in issue and pull request comments, never as a PR description section
- Never force-push, amend, or squash unless asked. Use new commits and normal push for pull request updates
- Keep comments short, prefer same-line, explain why, never narrate code. Preserve existing ones that still apply
- Ensure no trailing whitespace in edited files
- Run `make fmt` to format `.go` files, `make lint-go` to lint them, and `make tidy` after any `go.mod` changes
- Fix the cause rather than disabling a linter or weakening a test. Where unavoidable, use the narrowest scope with a trailing comment giving the reason
- Register new tools with `Tool.RegisterRead` or `Tool.RegisterWrite`, and add them to the tool tables in `README.md`, `README.zh-cn.md` and `README.zh-tw.md`
- Run single go tests with `go test -run '^TestName$' ./modulepath/`
- Write the fewest, fastest tests covering the behavior, extending an existing one where possible. Prefer unit tests where logic is testable in isolation
- Wait on a deterministic condition rather than `sleep`