- Use `make help` to find available development targets
- Run `make fmt` to format `.go` files, and run `make lint-go` to lint them
- Run `make lint-js` to lint `.ts` files
- Run `make tidy` after any `go.mod` changes
- Add the current year into the copyright header of new `.go` files
- Ensure no trailing whitespace in edited files
- Never force-push, amend, or squash unless asked. Use new commits and normal push for pull request updates
- Preserve existing code comments, do not remove or rewrite comments that are still relevant
- In TypeScript, use `!` (non-null assertion) instead of `?.`/`??` when a value is known to always exist
- Include authorship attribution in issue and pull request comments
- Add `Co-Authored-By` lines to all commits, indicating name and model used
