welc-scratch-refactoring
Use when reading a large, tangled legacy module has not produced a working mental model: refactor aggressively on a throwaway branch (extract, rename, reorganize) purely to understand the control flow and find seams, then discard the branch before making the real change.
Pinned to revision e4081cbb4d29, so it is the text this page describes rather than whatever the author pushed since.
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