{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://agenthooksprotocol.org/schemas/draft/content-upload-receipt.schema.json",
  "title": "AHP ContentUploadReceipt (Draft)",
  "type": "object",
  "required": [
    "ref",
    "size",
    "sha256"
  ],
  "properties": {
    "ref": {
      "type": "string",
      "minLength": 1
    },
    "size": {
      "type": "integer",
      "minimum": 0
    },
    "sha256": {
      "type": "string",
      "pattern": "^[a-f0-9]{64}$",
      "minLength": 64,
      "maxLength": 64
    }
  },
  "additionalProperties": false,
  "$comment": "Mutable AHP draft. ",
  "description": "HTTP 201 upload confirmation. ref identifies receiver-allocated immutable bytes; size counts exact octets and sha256 is their lowercase SHA-256 digest. Senders verify both before publishing only ref in an event body. This receipt is not event acknowledgement or proof of durable storage."
}