- Fix is_running() to check actual process liveness via try_wait()
instead of just checking if the handle exists
- Auto-restart sidecar on pipe errors (broken pipe, closed stdout)
with one retry attempt
- Hide sidecar console window on Windows (CREATE_NO_WINDOW flag)
- Log sidecar stderr to sidecar.log file for crash diagnostics
- Include exit status in error message when sidecar fails to start
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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