The Microfeature Handoff Pack: A Copy‑and‑Paste Contractor Bid Attachment

Keep the handoff tiny but complete. The pack contains five artifacts you can paste into a repo or attach to a bid: (1) a one‑page microfeature spec that states the goal, non‑goals, happy path, acceptance criteria, and edge cases; (2) a minimal OpenAPI YAML that stubs the endpoints the UI expects; (3) six Playwright acceptance tests that assert the shipped feature works end‑to‑end; (4) Figma slice rules and export instructions so assets are predictable; and (5) a two‑part risk and rollback checklist to avoid scope creep and unblock shipping.

Each artifact solves a single friction point between founders and contractors: clarity for estimations (spec), parallel work and local dev (OpenAPI stub), objective acceptance (Playwright tests), visual consistency (Figma rules), and safe delivery (rollback checklist).

Write the spec so a reviewer can understand the feature in under 60 seconds. Start with a one‑line Goal (user outcome), then a short Non‑Goals section that explicitly prevents scope creep. Next include the happy path user flow (stepwise), three testable acceptance criteria (expressed as pass/fail checks), and two highest‑risk edge cases with expected fallbacks.

Store the spec in README.md at the root of the feature branch or include it in the bid as a single file. This reduces back‑and‑forth because contractors can point to acceptance criteria when asking clarifying questions and use them to build Playwright tests.

Provide a minimal OpenAPI 3.x YAML that describes only the endpoints the UI will call, plus concrete example responses. Use an OpenAPI‑to‑mock tool (Prism/MockServer/openapi-mock variants) so contractors can run a local mock server instantly and develop the UI without a backend.

Keep the stub intentionally small: required fields, example responses for success and an error state, and the authorization shape. The point is not a complete API surface but a deterministic contract that Playwright tests can hit during CI to validate the entire flow.

Acceptance tests are the single source of objective completion. Provide six compact Playwright specs that map 1:1 to acceptance criteria: (1) happy path end‑to‑end, (2) validation error, (3) permission or role gating, (4) network failure / retry fallback, (5) visual verification (snapshot or element presence), and (6) telemetry/event fired. Keep them focused and fast — each should run in under 10 seconds in CI using the mock OpenAPI server.

Design tests to rely on robust locators (data‑testids or ARIA roles) rather than brittle CSS/XPath. Document the recommended test id attribute in the pack so contractors add it to elements. This dramatically reduces flakiness and maintenance burden.

Supply a short Figma rules doc: exact frame names, slice sizes (1x/2x), transparent vs. backgrounded exports, and which components contractors may override. If your contractor must export assets, include a one‑line export command and a sample filename convention so their deliverables integrate into the repo automatically.

Finish the pack with a risk & rollback checklist. The checklist should include whether feature flags exist, how to toggle them, a minimal rollback procedure (revert commit or disable flag), and data migration warnings. This prevents a contractor from accidentally shipping a non‑production‑safe change and gives you a clear path to undo without full rewrites.