I've seen enough CI pipelines die in an infinite loop of 'fix, retry, fail' to last a lifetime.
You know the pattern. An agent-driven QA process runs a suite. A Vitest assertion fails. The LLM looks at the error log, reads the code, and makes an executive decision: 'The logic is flawed; let me refactor this function.' It pushes a change. The pipeline runs again. It fails again with the exact same error—or worse, a slightly different one that breaks something else.
You''re not looking at a debugging problem anymore; you're looking at an agentic deadlock.
The fundamental issue isn't that LLMs are 'stupid.' It's actually more subtle: they are too confident in their own unverified reasoning. When you tell an agent to 'check the logs,' it doesn't actually perform a step-by-step arithmetic trace of the logic. It performs a high-level semantic scan, matches patterns that look like common bugs, and then reports back with total certainty.
If the test author wrote expected: 108 instead of expected: 100, the agent won't tell you the test is wrong. It will 'fix' your business logic to match a broken assertion. This is how 'coverage theater' turns into actual production regressions.
