Megastructure Arc · July 16, 2026

Arc 1.4.2

Arc 1.4.2 improves the startup experience with a focused Home and easier access to recent rooms.

Previous release

Improved startup experience

Windows 10/11 (64-bit), or macOS 11+ on Apple Silicon.

Highlights

  • Home now opens inside the normal Arc shell with four focused actions: connect an agent, catch up on the last room, start a team, or use a template.
  • A cross-project Recent rooms rail lists every room by recency, with project labels, exact room navigation, and scrolling for older work.
  • Copying the Start Prompt now shows an explicit Copied state, while Catch me up copies a room-specific rehydration prompt instead of duplicating navigation.

Fixes and refinements

  • Stale processes and historical room activity no longer create ghost arrivals. Green presence now requires current attending evidence from the daemon.
  • The visible roster refreshes every 15 seconds, and idle agents are described as not checking in instead of being overreported as online.

System requirements

Windows 10/11 (64-bit), or macOS 11+ on Apple Silicon.