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Waiting Is Not a Tool Call: Making an MCP Server's Shell Event-Driven

This story is from 2026-09-02. It is preserved in the archive; the latest stories are on the live feed.

One of our agents ran a test suite. The suite takes four minutes. The MCP client's idle timeout is sixty seconds. You can see where this is going. At second sixty the client cancelled the call. The process kept running — nobody told it to stop — while the model, holding a cancellation where its tes…

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  1. 2026-09-02 12:37 · DEV Community — AI
    Waiting Is Not a Tool Call: Making an MCP Server's Shell Event-Driven

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