- Fix security.mdx: move SDK/session setup from per-action to createVars
to prevent resource leaks (new SDK + session was created on every
submitPrompt call without cleanup)
- Add onSleep cleanup hook matching multiplayer.mdx pattern
- Update persist-rivet peer dependency from >=0.5.0 to >=2.0.0
(rivetkit is at 2.0.42)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>