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Testing the Untestable: A Regression Suite for a Coin Flip

This story is from 2026-09-07. It is preserved in the archive; the latest stories are on the live feed.

How do you regression-test a system that can answer differently twice? Part 8 findings of an experiment: building an LLM-powered support agent with deterministic boundaries. The companion repo contains the full code. Assert that the agent replies "Your refund request has been submitted for approval…

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  1. 2026-09-07 14:46 · DEV Community — AI
    Testing the Untestable: A Regression Suite for a Coin Flip

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