{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "chunk-manifest.schema.json",
  "title": "split_document chunk manifest",
  "type": "object",
  "required": ["schema_version", "tool", "created_at", "source", "max_chars", "offset_unit", "chunks", "round_trip_sha256", "self_check"],
  "properties": {
    "schema_version": {"const": "1.0"},
    "tool": {"const": "split_document"},
    "created_at": {"type": "string", "format": "date-time"},
    "source": {
      "type": "object",
      "required": ["path", "resolved_path", "sha256", "size_bytes", "char_count"],
      "properties": {
        "path": {"type": "string"},
        "resolved_path": {"type": "string"},
        "sha256": {"type": "string", "pattern": "^[0-9a-f]{64}$"},
        "size_bytes": {"type": "integer", "minimum": 0},
        "char_count": {"type": "integer", "minimum": 0}
      }
    },
    "max_chars": {"type": "integer", "minimum": 1},
    "offset_unit": {"const": "unicode_codepoint"},
    "chunks": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["index", "input_file", "rewritten_file", "start_offset", "end_offset", "char_count", "sha256", "boundary_reason"],
        "properties": {
          "index": {"type": "integer", "minimum": 1},
          "input_file": {"type": "string"},
          "rewritten_file": {"type": "string"},
          "start_offset": {"type": "integer", "minimum": 0},
          "end_offset": {"type": "integer", "minimum": 0},
          "char_count": {"type": "integer", "minimum": 0},
          "sha256": {"type": "string", "pattern": "^[0-9a-f]{64}$"},
          "boundary_reason": {"enum": ["h2", "paragraph", "eof", "oversize_atomic_block"]}
        }
      }
    },
    "round_trip_sha256": {"type": "string", "pattern": "^[0-9a-f]{64}$"},
    "self_check": {"const": true}
  },
  "additionalProperties": false
}