{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schemas.logicsrc.com/openprd-prd.schema.json",
  "title": "OpenPRD Product Requirements Document",
  "description": "The front-matter manifest of an OpenPRD document. OpenPRD is a lightweight, DIP-style proposal standard: a repo publishes a numbered collection of PRDs under prd/ (prd/NNNN-slug.md), with a 0000-template.md and a README index, committed to the repo like a BIP/EIP/DIP process. This schema governs the YAML front-matter; the body is Markdown with a fixed set of sections. Optional keys MAY be present but empty (null) — the template ships them blank for authors to fill.",
  "type": "object",
  "required": ["openprd", "id", "title", "status"],
  "additionalProperties": false,
  "properties": {
    "openprd": {
      "type": "string",
      "pattern": "^\\d+\\.\\d+(\\.\\d+)?$",
      "description": "OpenPRD standard version this document conforms to, e.g. '0.2'."
    },
    "id": {
      "type": "string",
      "pattern": "^\\d{4}$",
      "description": "Four-digit zero-padded number, monotonically increasing with no gaps. Matches the filename prefix: prd/<id>-<slug>.md."
    },
    "title": {
      "type": "string",
      "minLength": 1,
      "description": "Short imperative title — start with a verb where possible."
    },
    "status": {
      "type": "string",
      "enum": ["Draft", "Review", "Accepted", "Final", "Rejected", "Withdrawn", "Superseded"],
      "description": "Lifecycle stage. Draft → Review → Accepted → Final; or Rejected/Withdrawn/Superseded."
    },
    "authors": {
      "type": ["array", "null"],
      "items": { "type": "string" },
      "uniqueItems": true,
      "description": "Author identities — email, handle, or DID."
    },
    "owner": {
      "type": ["string", "null"],
      "description": "Optional DID or handle of the accountable owner (e.g. a LogicSRC account/agent DID)."
    },
    "repo": {
      "type": ["string", "null"],
      "description": "Optional owner/name of the repository this PRD targets."
    },
    "created": {
      "type": ["string", "null"],
      "format": "date",
      "description": "ISO date (YYYY-MM-DD) the PRD was created."
    },
    "updated": {
      "type": ["string", "null"],
      "format": "date",
      "description": "ISO date (YYYY-MM-DD) of the last substantive edit."
    },
    "discussion": {
      "type": ["string", "null"],
      "description": "Optional URL to the PR/issue/thread where this PRD is discussed."
    },
    "implementation": {
      "type": ["string", "null"],
      "description": "Optional URL/reference to the implementation PR or tracking issue."
    },
    "tags": {
      "type": ["array", "null"],
      "items": { "type": "string" },
      "uniqueItems": true,
      "description": "Optional freeform labels for grouping PRDs."
    },
    "supersedes": {
      "type": ["string", "null"],
      "pattern": "^\\d{4}$",
      "description": "Optional id of an earlier PRD this one replaces."
    },
    "superseded-by": {
      "type": ["string", "null"],
      "pattern": "^\\d{4}$",
      "description": "Optional id of a later PRD that replaces this one."
    }
  }
}