Contract Tests for Model Output: The JSON Safety Net You're Missing
This story is from 2026-08-29. It is preserved in the archive; the latest stories are on the live feed.
One day the model stops returning the shape you expected. You did not change your code. You did not change your prompt. But your parser starts throwing KeyError in production. You could patch the parser again. Most teams do. The better move is to write a contract test for the one API that changes w…
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- 2026-08-29 09:09 · DEV Community — AI
Contract Tests for Model Output: The JSON Safety Net You're Missing