{
  "artifactId": "urn:missionweaveprotocol:artifact:implementation-patch",
  "contentHash": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
  "uri": "https://artifacts.acme.example/sha256/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
  "sizeBytes": 4096,
  "mediaType": "application/vnd.git.patch",
  "schemaUri": "urn:missionweaveprotocol:schema:opaque",
  "producer": {
    "agentId": "urn:missionweaveprotocol:agent:developer-one",
    "agentCardVersion": 3,
    "capabilities": [
      {"id": "acme.software.python-implementation", "version": "2.1.0"}
    ]
  },
  "missionId": "urn:missionweaveprotocol:mission:one",
  "groupId": "urn:missionweaveprotocol:group:mission-one",
  "workItemId": "urn:missionweaveprotocol:work-item:implementation",
  "sourceArtifactHashes": ["sha256:bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"],
  "toolVersions": [{"name": "git", "version": "2.50.0"}],
  "modelVersions": [{"provider": "acme", "model": "developer-model", "version": "2026-07-01"}],
  "classification": "internal",
  "createdAt": "2026-07-15T03:00:00Z",
  "signature": {
    "algorithm": "Ed25519",
    "keyId": "urn:missionweaveprotocol:key:developer-one",
    "createdAt": "2026-07-15T03:00:00Z",
    "value": "c2lnbmF0dXJl"
  }
}