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CATT 0.2.1 Lets Developers Test Services Against Muse- and Instinct-Style Assistants in CI

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A team has open-sourced CATT, a Consumer Agent Testing Tool that helps developers iterate on services consumed by proprietary personal assistants like Muse and Instinct. The tool runs tests against a surrogate assistant that is not affiliated with those companies, letting testers define starting conditions, approvals, and success criteria. CATT records full interactions, including tool calls and responses, so outcomes can be compared against what the agent reports. It can run in local builds or in CI, with or without LLM backing, and labels its assumptions about assistant behavior as documented, unofficial, assumed, or unknown. The project is posted on Hacker News and invites feedback from teams building connectors or MCPs.

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