{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://trustgraduation.org/spec/0.1/approval-packet.schema.json",
  "title": "Trust Graduation Approval Packet",
  "description": "Prepare-only review packet for a consequential action. Trust Graduation Protocol v0.1.",
  "type": "object",
  "required": ["type", "action_class", "proposed_action", "decision", "external_actions"],
  "additionalProperties": true,
  "properties": {
    "type": { "const": "trust_graduation_approval_packet" },
    "action_class": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9]*(\\.[a-z][a-z0-9]*)+$"
    },
    "proposed_action": {
      "description": "Exact message, command, mutation, destination, or state change proposed for review."
    },
    "decision": {
      "$ref": "decision.schema.json"
    },
    "external_actions": {
      "type": "integer",
      "const": 0,
      "description": "Approval packets are local prepare artifacts and must not execute externally."
    },
    "evidence": {
      "type": "array",
      "items": {}
    },
    "required_approval": {
      "type": "boolean"
    },
    "receipt_preview": {
      "type": "object",
      "additionalProperties": true
    }
  }
}