Release notes · October 25, 2026

Megastructure Arc 2.2.3

Arc 2.2.3 keeps your room layout steady during routine refreshes, rejects malformed replace-all values in file edits, and makes AI settings names and output-token counts clearer.

Current release

Steadier room layouts, stricter file edits, and clearer AI settings

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

  • Routine refreshes no longer briefly add a “Stale snapshot” row that moves the room banner and Arc Loops. An existing status row keeps its full height while signals refresh. A slow refresh still shows a warning, and a failed refresh shows it immediately.
  • File edits reject malformed replace-all values. A malformed replace_all value can no longer make Arc replace every occurrence; Arc refuses the edit without changing the file or adding an undo entry.
  • The Settings navigation label now matches the AI Connections & Models page title in all four languages. Output-token help and save confirmations show thousands separators, such as 16,384.

System requirements

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

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