Fan-In Is the Refactor Safety Signal You're Ignoring
This story is from 2026-08-28. It is preserved in the archive; the latest stories are on the live feed.
Fan-In Is the Refactor Safety Signal You're Ignoring Most legacy refactors start in the wrong place. Teams write characterization tests for the easiest functions first. That order is backwards. The safest refactor starts at the seam with the most callers. Fan-in tells you which seam that is. Fan-in…
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- 2026-08-28 01:39 · DEV Community — AI
Fan-In Is the Refactor Safety Signal You're Ignoring