Error Responses

All errors follow a consistent shape:

interface LatticeError {
  error: string;           // Error code (e.g., "NOT_FOUND", "VALIDATION_ERROR")
  message: string;         // Human-readable description
  entityId?: string;       // Included when relevant
}

Error Codes

Status	Error Code	When
400	VALIDATION_ERROR	Missing required fields, invalid entity type
404	NOT_FOUND	Entity does not exist
404	PARENT_NOT_FOUND	Parent entity does not exist (on create)
404	ROUTE_NOT_FOUND	No matching route
409	VERSION_CONFLICT	Optimistic concurrency version mismatch
500	INTERNAL_ERROR	Unexpected server error