Timeline of Events

1. 07:01:57 - Extension Host Process exited normally (code: 0)
2. 07:02:27 - ManagementConnection disconnected, 3-hour reconnection timeout starts
3. 08:57-09:02 - Multiple "CSRF token not found" errors from Coder extension
4. 09:02:16 - Critical failure sequence:
   • Socket timeout after 20 seconds (unacknowledgedMsgCount: 17)
   • Attempted reconnection
   • resolveAuthority(ssh-remote) returned an error after 1 ms Cannot resolve authority
   • Permanent error - connection given up

Root Cause Analysis:

Primary Issue: Coder Extension Local Host Crash
The local extension host (PID 29360) terminated at 09:01:56, which killed all local extensions including the Coder extension that manages remote authority resolution.When VS Code tried to reconnect at 09:02:16, it called resolveAuthority(ssh-remote) but the extension was already dead, causing instant failure.Secondary Issues:

1. CSRF token errors - Repeated failures from the Coder extension (lines 64, 72, 236, 482, 483, 1044, 1290, 1291)
2. Navigator deprecation warnings - PendingMigrationError spam (not critical but noisy)

Why Language Features Break:

From the logs at 09:02:16:

Error: Unable to read file 'vscode-remote://.../.vscode/settings.json' (Canceled: Canceled)Error: Unable to read file 'vscode-remote://.../.vscode/tasks.json' (Canceled: Canceled)Error: Unable to read file 'vscode-remote://.../.vscode/launch.json' (Canceled: Canceled)

Full logs here:https://gist.github.com/ericpaulsen/1cacac3145384f2b1ea1c11be0b08d60

When the connection dies:

1. All file system operations are canceled
2. Language servers lose their connection to workspace files
3. Extensions can't read configuration
4. IntelliSense, linting, navigation all fail

Recommendations:

Immediate:

1. File issue for Coder extension stability - The local extension host should not be crashing. The CSRF token errors suggest authentication/session management bugs
2. Check for Coder extension updates - Logs show v1.11.3 with navigator deprecation warnings

Workarounds for users:

1. Keep VS Code window focused when possible (reduces suspend/resume issues)
2. Use "Remote-SSH: Kill VS Code Server on Remote" then reconnect (cleaner than window reload)
3. Consider web VS Code for critical work

Investigation needed:

1. Why is the Coder extension repeatedly failing CSRF token validation?
2. Why did the local extension host terminate at 09:01:56?
3. Is there a memory leak or resource exhaustion pattern?