{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "event_scope_change.schema.json",
  "title": "Scope Change Event Schema",
  "description": "Schema for scope_change event stored in bazinga-db. Records user-approved scope reductions.",
  "type": "object",
  "additionalProperties": false,
  "required": ["reason", "approved_by"],
  "properties": {
    "session_id": {
      "type": "string",
      "pattern": "^bazinga_",
      "description": "Session identifier"
    },
    "reason": {
      "type": "string",
      "description": "Reason for scope change"
    },
    "original_scope": {
      "type": "string",
      "description": "Original scope description"
    },
    "new_scope": {
      "type": "string",
      "description": "New reduced scope description"
    },
    "approved_by": {
      "type": "string",
      "enum": ["user", "pm"],
      "description": "Who approved the scope change"
    },
    "groups_affected": {
      "type": "array",
      "items": { "type": "string" },
      "description": "Task group IDs affected by scope change"
    },
    "timestamp": {
      "type": "string",
      "format": "date-time"
    }
  },
  "x-dedup-key": {
    "description": "Deduplication key",
    "fields": ["session_id", "timestamp"]
  }
}