Author fixes unhandled errors in Claude commit message tool

The author details a bug in their AI-powered commit message generation tool where unexpected errors from the `claude -p` command were not being handled correctly. Initially, the tool was designed to return error messages prefixed with "ERROR:" for all failure scenarios. However, it was discovered that subprocess errors like `CalledProcessError` and `FileNotFoundError` were not caught by the existing `TimeoutExpired` exception handler, leading to raw Python tracebacks instead of formatted error messages. To fix this, the `_claude` function was updated to include additional exception handling for these cases, ensuring all failures result in a predictable error string. AI

IMPACT Improves the robustness of AI-powered developer tools by ensuring proper error handling.

RANK_REASON The item describes a bug fix and improvement to a personal tool that uses an AI model, not a release of a new model or significant industry development.

Read on dev.to — MCP tag →

• Claude
• FileNotFoundError
• git_commit.py
• hooks/prepare-commit-msg
• MCP
• server.py
• subprocess.CalledProcessError
• subprocess.check_output
• subprocess.TimeoutExpired

• product
• other

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