Run a Clean Git Bisect
Use git bisect with known good, known bad, and a repeatable test command.
CSV export fails today, worked earlier this week, and 83 commits sit between known states. Manual diff scanning is too broad. Git bisect: known good + known bad + repeatable predicate. The common trap is to run bisect with a fuzzy manual check. If you sometimes mark a commit bad because setup failed, or good because the test did not exercise the bug, the binary search will confidently point to the wrong change. Step 1 Define the predicate: seed invoice INV-42, run CSV export, assert the tax column header and value are present. The predicate must answer one question consistently:…
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