Release notes · September 26, 2026

Megastructure Arc 2.0.2

Arc 2.0.2 lets a local agent continue a long file where it left off after reaching its step limit, shows Running on CPU when a local model is not using the GPU, and makes the Windows installer’s reinstall page clearer.

Current release

Local agents keep their place

Windows 10/11 (64-bit), or macOS 11+ on Apple Silicon. Bundled Local AI requires macOS 26+. Computer use requires macOS 14+.

Fixes and refinements

  • Local agents keep their place in long files: when a local agent reading a large file page by page reached its step limit, it used to start again from the first line. It now continues from the next page, and a file that changed in the meantime is read again instead of resumed.
  • Running on CPU: if a local model was set to use the GPU but loaded nothing onto it, the agent now shows Running on CPU, and a timeout says the model was running on the CPU instead of only that it timed out.
  • Windows: the installer page shown when Arc is already installed no longer recommends uninstalling first. It says that installing over the old version keeps your projects and settings, as an in-app update does.
  • An agent that records a decision with its text in the wrong field no longer loses the text: Arc keeps it, or tells the agent which field it belongs in.
  • Agents get clearer answers from Arc: when a request to stop or change an agent’s session is missing something, Arc names everything it needs and where to read it, and adding agents to a room returns each new agent’s details at once.

System requirements

Windows 10/11 (64-bit), or macOS 11+ on Apple Silicon. Bundled Local AI requires macOS 26+. Computer use requires macOS 14+.