A tool contract change is backward-compatible for engineers and still breaks model behavior. Why does that happen?

Instruction: Explain how a technically compatible change can still destabilize an AI integration.

Context: Tests how the candidate diagnoses the problem, chooses the safest next step, and reasons through recovery. Explain how a technically compatible change can still destabilize an AI integration.

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The way I'd think about it is this: Because models are sensitive to meaning, salience, and action framing in ways static clients are not. A change can be backward-compatible for code and still shift which fields look important, which tool seems more attractive, or how the...

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