Function isClaudeSystemInitEvent

isClaudeSystemInitEvent(
event: ClaudeTimelineEvent,
): event is ClaudeSystemInitTimelineEvent
Type guard for Claude system/init events (per-turn initialization).

After narrowing, event.data is an SDKSystemMessage.
Parameters
- event: ClaudeTimelineEvent
  The timeline event to test.
Returns event is ClaudeSystemInitTimelineEvent
true if event is a ClaudeSystemInitTimelineEvent.
- Defined in sdk/src/claude/timeline-event-guards.ts:168