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My Harness Used One Label for Three Different Failures.

This story is from 2026-09-14. It is preserved in the archive; the latest stories are on the live feed.

Three fixtures, three separate calls into the same reducer. Here is the complete failure_reasons each one returned, unedited: unreadable arriving args -> [ "SANDBOX_EVENT_CARDINALITY_INVALID" , "EXEC_ARGUMENTS_MISMATCH" , "TOOL_RESPONSE_CARDINALITY_INVALID" ] usable args, different -> [ "SANDBOX_EV…

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  1. 2026-09-14 01:32 · DEV Community — AI
    My Harness Used One Label for Three Different Failures.

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