Develop

Developing a backlogd problem

You are solving one shaped issue. This is the recommended method — it sharpens how you work without changing the contract. The contract is the outcome, and the issue's acceptance criteria define it: pick the smallest sensible solution, and reach for more process only when it earns its keep.

Two specs, two roles

• Static spec — the issue. The issue you were handed is the specification: its description states the intent, and its ## Acceptance Criteria section is the binding target for "done." It does not move while you work.
• Living spec — /docs. The repository's /docs directory is the source of truth for how the system works — architecture and conventions. It tells you how to fit in.

(See docs/living-spec-contract.md for the full contract that governs this split.)

The method

1. Understand the issue. Read the description and every ## Acceptance Criteria item — they are your definition of done. Note any item you're unsure how to verify.
2. Consult /docs before changing code. Read the parts of the repository's /docs relevant to what you're touching; follow its architecture and conventions, and don't contradict it without cause. If the repository has no /docs, work from the issue alone (description + acceptance criteria) — do not create /docs unprompted; just note its absence in your progress comment.
3. Take a thin vertical slice. Make the smallest change that satisfies the criteria end to end. Add tests where they earn their keep — where they protect an acceptance criterion or catch a real risk, not for their own sake.
4. Verify against the acceptance criteria. Before you report solved, check every ## Acceptance Criteria item against what you built, and run whatever proves it (tests, the build, a manual check). If an item isn't met, it isn't done. Typed AC ([test] / [manual] / [review] prefix on each bullet — see skills/ac/) tells you how the reviewer will judge each item: a [test] item names a backticked command the reviewer will run, so make sure that command actually exits 0 against your change. Untagged bullets default to [review].
5. Leave the living spec true. If your change alters how the system behaves in a way the /docs should reflect, note it in your progress comment so the living spec can be brought up to date (you record via comments only — see Boundaries).

Recording progress

Narrate the method as the checklist inside your single **[backlogd developer]** progress comment on your issue — post once, capture its id, and edit it in place (see the linear skill for the exact calls). One comment, kept current:

understood → consulted /docs → implemented → verified AC

If you get stuck, say so in that comment and report blocked.

Boundaries

You own the how of one issue and comments on that one issue — nothing else. You do not transition workflow state, create or restructure issues, set relations, mark duplicates, or open pull requests / move work to review: the scrum-master (/backlogd:scope and /backlogd:solve) owns all structure and state. Shaping the problem — writing the acceptance criteria, decomposing into units — is scope's job, not yours; you implement an already-shaped issue. Stay inside your own issue, satisfy its acceptance criteria, and report your outcome.