It should not be possible to exit opencode while it's silently updating itself to latest release

[tiberiuichim]

Description

I started opencode cli, then quit soon after. Next time I tried to start it, the command was not found because it was in the middle of a self-upgrade which it didn't finish. It would be also a good idea to show a toast message when it's self-updating

OpenCode version

1.0.132

Steps to reproduce

1. Open opencode when there's an update
2. stop it really soon after (maybe about 1 second delay)
3. you may or may not end up with opencode missing on your system.

Screenshot and/or share link

No response

Operating System

No response

Terminal

No response

[github-actions[bot]]

This issue might be a duplicate of existing issues. Please check:

• #4248: [FEATURE]: More transparent automatic version upgrades - Requests better visibility during automatic upgrades
• #5049: auto update shows the updated file in "Modified Files" section - Related to update notification issues
• #4450: (related) Request for OSC 9 terminal notifications - Proposes notification system for important events like agent completion
• #2987: [Bug] All sessions are gone - Related issue where interrupted operations caused data loss (from /compact command)

The core issues appear to be:

1. Lack of user notification during self-updates (preventing accidental interruption)
2. No mechanism to prevent exit while critical operations (like upgrades) are in progress
3. Incomplete update recovery - if the update is interrupted, the installation becomes broken

Feel free to ignore if none of these address your specific case.