The Playable-to-PRD Bridge: Ship a Contractor‑Ready Spec from a 60‑Second Demo in a Day

Long PRDs and vague design decks create friction when you need execution quickly. Contractors want unambiguous inputs: what to build, what the surface looks like, and what the API should do. A one‑page PRD focused on intent plus machine‑readable artifacts reduces back‑and‑forth and speeds delivery.

This approach pairs a compact human document with three interchangeable, developer‑friendly artifacts: an OpenAPI stub for endpoints, BDD acceptance tests for behavior, and a JSON‑LD feature card for discovery and product metadata. Together they make assumptions explicit and create a single source of truth for handoff.

1) Watch and timestamp the playable (15–30 minutes). Record the core user flows, required inputs, visible outputs, and any non‑functional observations (latency, device constraints). Treat the demo like a user story generator: every interactive element is a potential endpoint or state.

2) Write the one‑page PRD (20–40 minutes). Use a rigid template: problem, success metric, user job, minimal UI sketch (or annotated screenshot), acceptance criteria (linked), and technical constraints. Keep each field one or two lines — contractors will use the attached artifacts for detail.

3) Generate the OpenAPI stub (20–30 minutes). From the flows, define 3–6 endpoints with method, path, request/response schemas and example payloads. Focus on the happy path and a couple of common error responses; avoid exhaustive modeling at this stage.

4) Write concise BDD acceptance tests (15–30 minutes). For each major flow, write one Gherkin scenario using Given/When/Then that expresses the acceptance criteria in executable terms. These serve as the living contract for QA and devs.

Use these minimal templates as starter artifacts. Copy them into your project, fill in fields from the playable timestamps, and attach them to the PRD. They are intentionally small — enough for a contractor to start building and iterate with you.

The JSON‑LD feature card documents the feature for internal catalogs, discovery, and automated deployment pipelines. Use Schema.org's Product/SoftwareApplication types to publish a feature record contractors and tooling can read.

Bundle these files into a single folder or repo and include a lightweight README that explains what to run first. Expected turnaround for a small feature is often 1–5 days depending on scope; by giving the artifacts below you remove the slow clarification loops that typically double that time.

Prioritize items that unblock code: annotated screenshots (or a short Loom), the OpenAPI stub, and BDD scenarios. Keep design polish optional at first — contractors can scaffold UI from annotated images and the acceptance tests.