{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://opendefendable.com/specs/defendable-receipt-v0.1.json",
  "title": "Defendable Receipt v0.1",
  "description": "Starter public schema for proof records emitted by Defendable-compatible routers, workers, datasets, policy engines, and agent runtimes.",
  "type": "object",
  "required": [
    "receipt_id",
    "receipt_type",
    "subject",
    "created_at",
    "checksum_sha256"
  ],
  "properties": {
    "receipt_id": {
      "type": "string",
      "description": "Stable receipt identifier. Implementations should use collision-resistant IDs."
    },
    "receipt_type": {
      "type": "string",
      "enum": [
        "agent_action",
        "dataset_access",
        "compute_quote",
        "compute_job",
        "fine_tune_job",
        "worker_registered",
        "job_leased",
        "artifact_reported",
        "policy_evaluation",
        "audit_export"
      ]
    },
    "subject": {
      "type": "object",
      "description": "Actor, agent, member, worker, or system that produced or caused the event.",
      "additionalProperties": true
    },
    "policy": {
      "type": "object",
      "description": "Policy pack, rules, controls, or review requirements evaluated for this action.",
      "additionalProperties": true
    },
    "inputs": {
      "type": "object",
      "description": "Datasets, prompts, tools, models, job parameters, or other material inputs.",
      "additionalProperties": true
    },
    "outcome": {
      "type": "object",
      "description": "Result, decision, status transition, cost, artifact URI, or failure state.",
      "additionalProperties": true
    },
    "amount_usd": {
      "type": ["number", "null"],
      "minimum": 0
    },
    "metadata": {
      "type": "object",
      "additionalProperties": true
    },
    "created_at": {
      "type": "string",
      "format": "date-time"
    },
    "checksum_sha256": {
      "type": "string",
      "description": "SHA-256 digest of canonical receipt JSON excluding checksum_sha256."
    }
  },
  "additionalProperties": true
}