{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "hms/schemas/cluster/cluster_message_v1.schema.json",
  "title": "HMS Cluster Message v1",
  "description": "PLAN.md §6.5: Jede Cluster-Nachricht enthält mindestens cluster_id, node_id, command_id, Sequenz, Projekt-Revision, Absenderzeit und Trace-ID.",
  "type": "object",
  "required": ["cluster_id", "node_id", "command_id", "sequence", "project_revision", "sender_time_ns", "trace_id"],
  "properties": {
    "cluster_id": {"type": "string", "format": "uuid"},
    "node_id": {"type": "string", "format": "uuid"},
    "command_id": {"type": "string", "format": "uuid"},
    "sequence": {"type": "integer", "minimum": 0},
    "project_revision": {"type": "integer", "minimum": 0},
    "sender_time_ns": {"type": "integer", "minimum": 0},
    "trace_id": {"type": "string", "format": "uuid"},
    "execute_at_show_time_ns": {"type": ["integer", "null"], "minimum": 0},
    "status": {"enum": ["accepted", "armed", "executed", "failed"]},
    "payload": {"type": "object"}
  }
}