Description

This command extends the time-to-live of an active session when meaningful user activity is detected. It produces a SessionRefreshed event with the updated expiration timestamp.

Preconditions

• Session exists and is in Active state
• Current time is before the session’s expiresAt
• Activity qualifies for TTL refresh (configurable threshold)

Command handler behavior

The Decider’s decide function validates:

1. Session ID exists in current state
2. Session is Active (not Expired or Invalidated)
3. Sufficient time has passed since last refresh (debounce)

If validation passes, emits SessionRefreshed event with new expiresAt. If session is expired or invalidated, returns error.