The Launch‑Ready Integrations Brief: One Page That Produces Mockups, API Stubs, Tests, and Sales Copy

Design the brief as a compact mapping from intent to actionable output. Keep it under 400 words and split into fixed fields: Integration Goal, User Flow, OAuth Scope & Grant, Webhook Events, Data Map (source → canonical), UI Surface Rules, Acceptance Criteria, SEO/Product Copy Summary. Each field has a one‑to‑one mapping to a deliverable: goals and UI rules feed Figma mock rules; OAuth details feed security sections in the OpenAPI stub; webhook events plus data map yield event schemas and test vectors; acceptance criteria become automated acceptance tests; and the SEO/Product Copy Summary maps to JSON‑LD and the buyer one‑pager.

Treat each field as 'executable text' — concise sentences using a small vocabulary so that scripts, contract engineers, or internal tooling can parse them without ambiguity. For example, specify OAuth like: 'OAuth2 Authorization Code; scopes: profile, orders.read; expiry: 1 hour; refresh token: yes.' That single line is enough to scaffold the OpenAPI securitySchemes block and a README for the security reviewer.

Figma mock rules are not full screens; they are constraints. Convert 'UI Surface Rules' into a short list of components, props, and state variants. Example rule: 'Connected account card — shows provider icon, last sync time, sync status (green/yellow/red), "Reauthorize" button if token expired.' Use that to create component variants and an auto‑layout that designers or contractors can paste into a Figma file.

Acceptance tests live next to these rules. Each user flow step becomes a Gherkin/BDD scenario (Given/When/Then). For instance: 'Given merchant has a connected account with access token expired; when merchant clicks Reauthorize; then OAuth flow completes and the account state shows green.' These acceptance scenarios are directly runnable by test frameworks (Cypress, Playwright) if you map component selectors to the Figma component names.

OpenAPI stubs should include the securitySchemes from your OAuth line and example responses derived from the Data Map. From a single brief line like 'GET /merchant/orders returns orders[] with id, total_amount (int cents), currency (ISO4217), status (enum: paid, refunded, pending)', you can generate an OpenAPI path with request/response schemas, example payloads, and security requirements. Public examples and quickstarts from OpenAPI projects provide patterns to copy for stub generation.

Webhooks require explicit event contracts and delivery semantics. List each event name, its JSON payload fields (mapped to canonical names), the signing header name, and idempotency guidance. That mapping lets you produce JSON Schema for each event, sample webhook payloads for acceptance tests, and a short webhook README for the integration page. Follow existing providers' best practices for signing and retries to avoid common security and reliability issues.

The Product Copy Summary should be intentionally short (50–120 words) and include three explicit data points: core benefit, supported platforms/flows, and a key restriction or requirement (e.g., merchant must have a Stripe account). From that summary you can auto‑generate JSON‑LD for the product using schema.org Product and Offer fields so marketplaces and search engines can consume canonical seller facts.

The buyer one‑pager is a boiled‑down README: headline, what it connects to, what it syncs (data map highlights), expected time‑to‑setup, and security notes. Keep it single‑column PDF or HTML so sales and onboarding teams can share it immediately. The brief's acceptance criteria and OAuth/webhook lines supply the technical caveats to include under 'Security & Requirements.'

Use the one‑page brief to produce five artefacts and a checklist: (1) Figma component file with specified component names and variants; (2) OpenAPI YAML stub with securitySchemes and example responses; (3) JSON Schema and sample payloads for webhooks; (4) BDD acceptance tests (Gherkin) wired to test IDs; (5) JSON‑LD snippet plus buyer one‑pager PDF/HTML. Deliver each artefact with a 2–3 line README that references the brief fields that generated it.

Make the handoff executable: include small scripts or guidance for how to import the OpenAPI stub into tooling (e.g., Swagger UI or codegen), how to load sample payloads into your webhook test harness, and where to paste the JSON‑LD into the product page. This removes questions contractors normally ask and shortens cycle time from days to hours.