Tests as verification

Build-along · ~10 min at your own keyboard

Anything with rules — a CMA calculator, a comp sorter, a seller net-sheet tool — can carry its own tests: 'given these 3 inputs, the output must be exactly this.' Have Claude write the checks alongside the work, and every future change gets caught the moment it breaks something. A net sheet that's off by the wrong commission rate is a hard conversation at closing.

Do this

0/4

Share what happened

Paste your 3 hand-written cases and the pass/fail results across both runs.