Microsoft has released Visual Studio Code 1.129, and the headline change isn’t a new feature so much as a new foundation. The update introduces the agent host, a dedicated process that runs AI coding agents like Copilot, Claude, and Codex outside the editor itself, using a new open protocol called the Agent Host Protocol (AHP). That distinction matters more than it sounds. Until now, agent sessions in VS Code lived inside the extension host, tied to the lifecycle of a single window. Close the window, and the session’s context went with it. The Agent Host Protocol is an open, agent-agnostic protocol between a host and its clients that uses JSON-RPC for communication and immutable state with pure reducers for synchronized session data. In practice, that means an agent session becomes something closer to a resource on a server than a temporary artifact of one editor window. The host owns agent sessions independently of the clients that display and control them, which gives VS...
AI coding assistants have become an essential part of developers’ work, automating many of the repetitive tasks – think boilerplate coding and scaffolding – that in the past ate up a lot of their time. More jobs can now get done faster. That said, such agents also represent a significant security risk, making developers – who were already targets of cybercriminals – even more attractive. In recent weeks, cybersecurity researchers have reported on such threats as “ HalluSquatting ” and “ GhostApproval ,” which target developers and their AI tools. That’s in part because the adoption of AI coding agents is outpacing the development of security tools to protect them. Cyberhaven Lab researchers noted in May that adoption of AI coding agents was growing faster than the use of any other AI tool, jumping 357% between February 2025 and this year. They also are the highest-risk category. “When a developer pastes a code block into a coding assistant, or when an agentic coding tool browses a ...