Tests as verification

Build-along · ~10 min at your own keyboard

Anything with rules, a production-index sorter, a privilege-log formatter, a deadline table that reads dates off an order. 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 deadline table that is off because a date was typed from memory is a missed filing with your name on it.

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Share what happened

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