Reference

Canonical lookups — the "what does field X look like" docs.

Available

Doc	What it covers
Prisma models	Every field in every Prisma model — types, defaults, constraints, indexes
Environment variables	Every process.env.* the codebase reads, with defaults and where used

To write next

• api-internal.md — internal API endpoints (currently just /api/go/r/[retailerId]/p/[listingId])
• s2s-postback.md — affiliate postback contract once defined in #17
• scraper-fixtures.md — convention for retailer HTML fixtures used in tests

What goes here

• API endpoints (request/response shapes, error codes)
• Database / Prisma model field definitions
• Environment variables
• Third-party contracts (S2S postback, retailer feed formats)
• Configuration knobs (mkdocs.yml, next.config.ts, etc.)

What does NOT go here

• Why a model is shaped that way → ADR
• How the system uses these models → Architecture
• How to operate against these → Runbook