Demo script uncovers API contract bug missed by automated tests

A developer uncovers a critical production API bug during a live demo, despite a 10-test suite passing all checks.

Published 23h1 source

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The fact

The API contract issue was identified in 10 minutes through manual, real-world testing, bypassing the limitations of mock-based unit tests.

The incident highlights the gaps in automated testing for real-world integration scenarios and the value of live demos for validation.

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Auto-synthesis from 1 media source · identified on July 16, 2026