{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://workspai.dev/schemas/workspace-intelligence/architecture-change-lease.v1.json",
  "title": "Workspai Architecture Change Lease",
  "type": "object",
  "required": ["schemaVersion", "changeId", "goalId", "createdAt", "workspace", "scope", "baseline", "generation", "semantics", "privateMaterialization"],
  "properties": {
    "schemaVersion": { "const": "workspai.architecture-change-lease.v1" },
    "changeId": { "type": "string", "pattern": "^change-[a-z0-9][a-z0-9-]{7,95}$" },
    "goalId": { "type": "string", "minLength": 1 },
    "createdAt": { "type": "string", "format": "date-time" },
    "workspace": { "type": "object", "required": ["name"], "properties": { "name": { "type": "string", "minLength": 1 } }, "additionalProperties": false },
    "scope": { "$ref": "decision-event.v1.json#/$defs/scope" },
    "baseline": {
      "type": "object",
      "required": ["model", "graph"],
      "properties": {
        "model": { "$ref": "decision-event.v1.json#/$defs/artifactReference" },
        "graph": {
          "type": "object",
          "required": ["role", "artifact", "schemaVersion", "digest", "inputHash"],
          "properties": {
            "role": { "type": "string", "minLength": 1 },
            "artifact": { "type": "string", "minLength": 1 },
            "schemaVersion": { "type": "string", "minLength": 1 },
            "digest": { "$ref": "decision-event.v1.json#/$defs/digest" },
            "inputHash": { "$ref": "decision-event.v1.json#/$defs/sha256" }
          },
          "additionalProperties": false
        }
      },
      "additionalProperties": false
    },
    "generation": { "$ref": "decision-event.v1.json#/$defs/sha256" },
    "semantics": { "const": "optimistic-generation-guard" },
    "privateMaterialization": {
      "type": "object",
      "required": ["artifact", "role", "portable", "authoritative", "digest"],
      "properties": {
        "artifact": { "type": "string", "minLength": 1 },
        "role": { "const": "hash-bound-baseline-cache" },
        "portable": { "const": false },
        "authoritative": { "const": false },
        "digest": { "$ref": "decision-event.v1.json#/$defs/digest" }
      },
      "additionalProperties": false
    }
  },
  "additionalProperties": false
}