{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://thinkloom.app/schemas/provenance/1.0/derived-index-manifest.schema.json",
  "title": "Derived index manifest",
  "description": "Non-authoritative reproducibility metadata for a derived index.",
  "type": "object",
  "properties": {
    "schema_version": {
      "const": "1.0"
    },
    "index_type": {
      "enum": [
        "content_index",
        "contribution_graph",
        "manuscript_lineage",
        "checkpoint_index"
      ]
    },
    "source_chain_head": {
      "type": "string",
      "pattern": "^sha256:[a-f0-9]{64}$"
    },
    "source_event_count": {
      "type": "integer",
      "minimum": 0
    },
    "generator": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string",
          "minLength": 1
        },
        "version": {
          "type": "string",
          "pattern": "^\\d+\\.\\d+\\.\\d+$"
        },
        "configuration_sha256": {
          "type": "string",
          "pattern": "^sha256:[a-f0-9]{64}$"
        }
      },
      "required": [
        "name",
        "version",
        "configuration_sha256"
      ],
      "additionalProperties": false
    },
    "content_sha256": {
      "type": "string",
      "pattern": "^sha256:[a-f0-9]{64}$"
    },
    "generated_at": {
      "type": "string",
      "format": "date-time",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}\\.\\d{3}Z$"
    }
  },
  "required": [
    "schema_version",
    "index_type",
    "source_chain_head",
    "source_event_count",
    "generator",
    "content_sha256",
    "generated_at"
  ],
  "additionalProperties": false,
  "examples": [
    {
      "schema_version": "1.0",
      "index_type": "contribution_graph",
      "source_chain_head": "sha256:ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
      "source_event_count": 42,
      "generator": {
        "name": "thinkloom-indexer",
        "version": "1.0.0",
        "configuration_sha256": "sha256:0000000000000000000000000000000000000000000000000000000000000000"
      },
      "content_sha256": "sha256:1111111111111111111111111111111111111111111111111111111111111111",
      "generated_at": "2026-07-17T18:42:10.123Z"
    }
  ]
}