Ripgrep EAGAIN Error Auto-Retry

What: Automatic retry mechanism when ripgrep encounters "Resource temporarily unavailable" (EAGAIN/error 11) errors.

How it works: When ripgrep fails with an EAGAIN error (common in high-concurrency environments), Claude Code now:

1. Detects the error from stderr output
2. Logs a debug message
3. Retries the search with single-threaded mode (-j 1)
4. Sets a global flag to use single-threaded mode for all subsequent ripgrep calls

Details:

• Error detection function lJ9() checks for "os error 11" or "Resource temporarily unavailable" strings
• Only retries once to prevent infinite loops
• Telemetry event tengu_ripgrep_eagain_retry is logged when this occurs
• Evidence: lJ9() function at line 17125, retry logic at lines 17163-17178