Record Once, Replay Forever: Cassette Tests for Flaky Agent Tool Calls
This story is from 2026-10-20. It is preserved in the archive; the latest stories are on the live feed.
An agent fails a task on Tuesday morning. You rerun the identical task on Wednesday and it passes. No commit landed in between. That is not a fix. It is a new experiment with different inputs. Retrieval changed, rate limits reset, and sampling took another path. Cassette testing closes that gap. Yo…
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- 2026-10-20 09:36 · DEV Community — AI
Record Once, Replay Forever: Cassette Tests for Flaky Agent Tool Calls