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A Day in the Life of a Harness Engineer
The first three chapters made the case — the bottleneck isn't the model, it's the harness. Now the question is: what does building that harness actually look like on a real day? Ada and Boris walk through the full shape of harness engineering work: two complementary halves (environment building and work management) that run simultaneously, and the central reflex that defines the job — when something breaks, don't fix the code, ask what structural change would prevent the whole class of problem. The episode walks a concrete day: morning PR review where one bad PR becomes two permanent linter…
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