The Acceptance‑Test‑First PRD: A 1‑Page Template That Becomes Tests, Stubs & Feature Cards

Traditional long PRDs force engineers to translate prose into behavior; that translation is where bugs, scope creep, and misaligned expectations happen. An acceptance‑test‑first PRD flips the sequence: define the observable behavior (acceptance tests) first, then the implementation. That reduces interpretation and creates machine‑readable artifacts you can run or mock against.

For small teams and contractor handoffs, the high leverage comes from immediate outputs: a Playwright test that demonstrates the UI flow, an OpenAPI stub that lets frontend work offline, and a JSON‑LD feature card that can be embedded in marketing pages or QA docs. These artifacts shorten the feedback loop between product, design, and engineering.

Use this compact structure as a single page in your docs repo or PRD template. Each section maps to an output artifact. Keep every acceptance criterion in Given/When/Then form so it can be directly translated into tests and examples.

Template fields (copy into your template file): Title; Goal (one sentence); Out‑of‑scope; Stakeholders; Acceptance tests (numbered Given/When/Then); Example payloads (request/response); UI screenshot or sketch link; Delivery notes and contract checklist.

Take a single acceptance test written as Given/When/Then and turn it into a Playwright test file. Keep the GWT as a docstring at the top of the test so reviewers can cross‑check behavior against the PRD.

Playwright supports code generation and record‑and‑replay which helps bootstrap tests, but the valuable part is the explicit mapping from the PRD's steps to the assertions in the test file. Below is the minimal pattern you can paste into your repo and run with Playwright.

When an acceptance criterion references an API, include a compact OpenAPI snippet in the PRD's Example payloads. That OpenAPI fragment becomes the input for mock server generators and contract test tools so frontend engineers can build and validate flows before the backend is complete.

Tools and services can generate mock servers and WireMock/JSON stub mappings directly from an OpenAPI document. Attach a minimal OpenAPI path, request/response schema, and one or two examples — that’s sufficient to create realistic mocks for UI development and for contract validation during CI.

Add a JSON‑LD feature card to the PRD that summarizes the feature as structured data. Use schema.org Product or SoftwareApplication types when appropriate. This small JSON‑LD snippet helps marketing, documentation, and automated trackers understand the feature and can be embedded on a landing page or internal docs.

Keep the feature card minimal but unambiguous: name, short description, relevant identifiers (slug or UUID), and a canonical URL. That guarantees any consumer of structured data (search, docs generators, or tooling) can render a consistent feature summary without parsing the whole PRD.