{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://fablepool.org/schemas/fpcf/v1/defs.schema.json",
  "title": "FablePool wire format v1 — shared definitions",
  "$defs": {
    "opId": {
      "type": "string",
      "pattern": "^fp:op:[0-9a-f]{64}$",
      "description": "SHA-256 (lowercase hex) of the canonical envelope minus the id member."
    },
    "keyId": {
      "type": "string",
      "pattern": "^fp:key:ed25519:[0-9a-f]{64}$",
      "description": "Raw 32-byte Ed25519 public key, lowercase hex."
    },
    "contentHash": {
      "type": "string",
      "pattern": "^fp:sha256:[0-9a-f]{64}$",
      "description": "SHA-256 content address of raw evidence bytes."
    },
    "timestamp": {
      "type": "string",
      "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}Z$",
      "description": "RFC 3339 UTC, second precision, trailing Z. Calendar validity is checked semantically (ERR_TS_FORMAT)."
    },
    "signature": {
      "type": "string",
      "pattern": "^[0-9a-f]{128}$",
      "description": "Raw 64-byte Ed25519 signature, lowercase hex."
    },
    "confidence": {
      "type": "integer",
      "minimum": 0,
      "maximum": 1000,
      "description": "Confidence in milli-units (0 = none, 1000 = certain). Integers only; floats are forbidden by canonical form."
    },
    "opType": {
      "enum": [
        "evidence-ingest",
        "claim-assert",
        "correction",
        "refutation",
        "permission-grant",
        "revocation",
        "inference-call"
      ]
    },
    "claimObject": {
      "type": ["string", "integer", "boolean", "object", "array", "null"],
      "description": "The value of a claim. Any canonical JSON value; non-integer numbers are excluded."
    },
    "nonEmptyString": {
      "type": "string",
      "minLength": 1,
      "maxLength": 4096
    }
  }
}