Why Claude Opus 5 loves the word 'seam': a tip of the hat to Michael Feathers
mattpocockuk · x · 2026-09-04
Matt Pocock traces Claude Opus 5's fondness for the word "seam" back to Michael Feathers' classic Working Effectively With Legacy Code, which coined the term — a point in code where you can alter behavior without editing it. Rather than blame Feathers, Pocock suggests thanking him and recommends the book as a must-read for legacy code refactoring.
Related event: Claude Opus 5's Love of "Seam" Traced to Legacy Code Classic(2 posts)→
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