{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://aletheia.lab/schemas/ledger_entry.schema.json",
  "title": "LedgerEntry",
  "type": "object",
  "required": ["id", "timestamp", "actor", "mode", "action_id", "status", "summary"],
  "properties": {
    "id": { "type": "string", "pattern": "^led_[a-zA-Z0-9_-]+$" },
    "timestamp": { "type": "string", "format": "date-time" },
    "actor": { "type": "string", "minLength": 1 },
    "mode": { "type": "string", "enum": ["A0", "A1", "A2"] },
    "intent_id": { "type": "string", "pattern": "^intent_[a-zA-Z0-9_-]+$", "default": "" },
    "action_id": { "type": "string", "pattern": "^act_[a-zA-Z0-9_-]+$" },
    "status": { "type": "string", "enum": ["planned", "approved", "executed", "failed", "aborted"] },
    "summary": { "type": "string", "minLength": 1 },
    "inputs_hash": { "type": "string", "default": "" },
    "outputs_hash": { "type": "string", "default": "" },
    "artifacts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["kind", "ref"],
        "properties": {
          "kind": { "type": "string", "enum": ["message", "file", "db_record", "tx", "post", "report"] },
          "ref": { "type": "string" }
        },
        "additionalProperties": false
      },
      "default": []
    },
    "policy_gate_snapshot": { "type": "object", "default": {} }
  },
  "additionalProperties": false
}