## Core
### Improvements
- Added an Effect-based core event system for more complete event delivery across sessions and integrations.
### Bugfixes
- Ignored invalid exports in custom tool modules instead of failing tool loading.
- Ignored project instruction lookup errors so sessions keep loading when project instruction discovery fails.
- Fixed versioned event projector lookups so event replay uses the right handlers.
## Desktop
### Improvements
- Auto-hide the menu bar on Linux and Windows. (@shi-gg)
### Bugfixes
- Fixed archived sessions being reprocessed when their archive state did not change.
## SDK
### Bugfixes
- Restored missing event types in the JavaScript SDK, including session and message events.
**Thank you to 1 community contributor:**
- @shi-gg:
- feat(desktop): auto-hide menu bar on Linux and Windows (#27618)