Counterparty Agent Exposure: the ChatGPT Messages Plugin
Your Texts, Read by Someone Else's AI
In August 2026 a ChatGPT plugin began letting Mac users read, search, summarize and send Messages through the assistant. This brief looks at the release from the side of a principal who never installs it but whose counsel, assistants and family might, and asks what controls exist for others in a thread. Built from vendor and platform documentation, press reporting and 2026 privilege rulings. For family offices and counsel managing the people who hold a principal's correspondence.
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