Use Git Worktree to Send Agents to Bug Crime Scenes
Puzzled_Camera_7805 · reddit · 2026-07-12
The author introduces an open-source skill for historical bug debugging, solving the issue where AI coding assistants only see the current code and miss past error contexts.
Core workflow:
- Parse the historical commit corresponding to the error from the git log.
- Use git worktree to check out the code at that point in time in an isolated temporary directory.
- Let the agent locate the true root cause in the older codebase.
- Force delete the temporary worktree afterward to avoid polluting the current workspace.
This prevents side effects from a direct git checkout, such as forgetting to switch back, entering a detached HEAD state, or overwriting uncommitted changes. The skill can be installed via a single command from the open registry into agents that support skills.
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