Intermediate recipes

Use these patterns when the timer coordinates with side effects or external app state.

Core lifecycle callbacks

• Once-only onEnd: run completion logic once per generation.
• Backend event stop: cancel a timer from a WebSocket, SSE event, or external subscription.

Schedules

• Polling schedule: run cadence callbacks while the timer is active.
• Autosave heartbeat: save drafts or ping presence on a cadence.
• Poll and cancel: stop early when backend state says the flow is closed.

Diagnostics

• Diagnostics: emit optional lifecycle and schedule events while investigating behavior.