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Passing Tests Is a Terrible Reward. Build a Reward Hacking Detector in TypeScript.

Give a coding agent a task. Give it tests. Pay it when the tests pass. It will learn to make the tests pass. That's not the same thing as learning to code. Two weeks ago, one of the biggest open releases of the year put real numbers on that gap. On September 22, 2026, Xiaomi released MiMo-V2.6 and…

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  1. 2026-10-05 01:03 · DEV Community — Machine Learning
    Passing Tests Is a Terrible Reward. Build a Reward Hacking Detector in TypeScript.

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