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An AI agent fixes a bug. The tests pass. Everyone moves on. But what if the tests never exercised the failing code path? I wrote about this using a simple C++ example, and why a green checkmark isn't always enough. x.com/AxialisSoftw...

x.comAXIALIS | Desktop App Tools (@AxialisSoftware) on XYour AI Agent Fixed the Bug. It Just Never Tested the Bug.

Aries Spring

@ariesspring.bsky.social

had that. suite stayed green because the fixture never hit the branch the agent patched. coverage number looked great

Axialis

@axialis.com

Exactly. High coverage doesn't help much if the fixture misses the one path that actually matters. That's the tricky part to catch.

15/10/26, 2:21 pm0 reposts1 like

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