Implement the work described by the user in the spec or tickets. Claim the tickets you are working on.
Use $ponytail ultra as a strict guideline.
Use $tdd where possible, at pre-agreed seams.
If doing user-facing changes always verify the entire flow end-to-end with a browser, iOS simulator or Android emulator.
Run the full check suite (typechecking, linting, tests) once at the end as per repository guidelines.
Once done, run $implementation-review on the work.
Commit your work to a new branch from the current base.