{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://workspai.dev/schemas/workspace-intelligence/project-knowledge-graph-reference.v1.json",
  "title": "Workspai Project Knowledge Graph Reference",
  "description": "Portable, integrity-bound project reference to the canonical workspace Knowledge Graph.",
  "type": "object",
  "additionalProperties": false,
  "required": ["schemaVersion", "generatedAt", "project", "canonical", "summary", "integrity"],
  "properties": {
    "schemaVersion": { "const": "project-knowledge-graph-reference.v1" },
    "generatedAt": { "type": "string", "format": "date-time" },
    "project": {
      "type": "object",
      "additionalProperties": false,
      "required": ["name"],
      "properties": { "name": { "type": "string", "minLength": 1 } }
    },
    "canonical": {
      "type": "object",
      "additionalProperties": false,
      "required": ["graph", "boundedQuery", "sourceHash", "projectionHash"],
      "properties": {
        "graph": { "const": "workspace:.workspai/reports/workspace-knowledge-graph.json" },
        "boundedQuery": { "type": "string", "minLength": 1 },
        "sourceHash": { "type": "string", "pattern": "^[a-f0-9]{64}$" },
        "projectionHash": { "type": "string", "pattern": "^[a-f0-9]{64}$" }
      }
    },
    "summary": {
      "type": "object",
      "additionalProperties": false,
      "required": ["entityCount", "relationCount", "proofCount"],
      "properties": {
        "entityCount": { "type": "integer", "minimum": 0 },
        "relationCount": { "type": "integer", "minimum": 0 },
        "proofCount": { "type": "integer", "minimum": 0 }
      }
    },
    "integrity": {
      "type": "object",
      "additionalProperties": false,
      "required": ["algorithm", "payloadHash", "portable", "absolutePathsEmitted"],
      "properties": {
        "algorithm": { "const": "sha256" },
        "payloadHash": { "type": "string", "pattern": "^[a-f0-9]{64}$" },
        "portable": { "const": true },
        "absolutePathsEmitted": { "const": false }
      }
    }
  }
}