Skip to content
Agents tracked: 378 Downloads (7d): 244M down 5.7% GitHub stars: 8.4M VS Code installs: 151M Releases (7d): 407 Agent status: 1 with issues Updated Oct 10, 2026
AgentGid
✦ Ask

Cmux changelog: what's new each month

Every stable Cmux release summarised by month: the highlights, new features, improvements, fixes and anything you need to act on. 3 months covered; the current month updates daily.

October 2026 · so far

1 release: 0.65.0

October brought a licensing update as cmux now bundles the ghostty CLI with GNU libintl from gettext.

September 2026

3 releases: 0.64.23 → 0.64.25

September brought SDK releases, stability improvements across platforms, and hardening of core infrastructure. The month focused on reliability in cloud features and cross-platform synchronization.

Highlights

  • Published four new SDKs including the Rust SDK as cmux-sdk, without affecting CLI packages.
  • Fixed critical memory guardrail issue and resolved terminal resize problems across pane transitions.
  • Improved iOS workspace group functionality and reconnect stability with pixel scroll preservation.
  • Hardened route-content equivalence against reorders and installation races.
  • Enhanced Cloud Desktop transport and persistence with scoped SSH for file operations.

New

  • Rename focused workspace group with Cmd+Shift+R keyboard shortcut.
  • Include Pi session titles in notifications.
  • Scoped Freestyle SSH support for Cloud file push operations.
  • Cloud local overrides available in Nightly and debug builds.
  • Browser feature flag evaluation caching for five-minute intervals.

Improved

  • iOS workspace groups and reconnect transitions are now dogfood-ready.
  • Treat "no update available" response as a success condition in Attempt Update.
  • Production deployment rollback guards hardened against edge cases.
  • iOS access to v2 Macs and saved computer metadata now preserved across updates.
  • Cloud VM creation optimized by removing redundant network announcement wait.
  • Terminal resize publication now works correctly across pane and restore transitions.

Fixed

  • Fixed runaway memory guardrail default that caused resource issues.
  • Resolved iOS Ghostty startup crash on internal builds.
  • Fixed Cloud Desktop transport, recovery, and split persistence problems.
  • Corrected missing changelog in IndexNow deployment.
  • Fixed Computer Use onboarding and preference notification deadlocks.
  • Fixed terminal pixel scroll preservation through reconnect gaps on iOS.

August 2026

2 releases: 0.64.21 → 0.64.22

August brought the completion of Cmux's production Iroh transport rollout alongside refinements to terminal support and critical bug fixes. The month focused on stability, iOS improvements, and shell integration reliability.

Highlights

  • Finished production Iroh transport rollout with improved connection lifetime handling.
  • Added support for browser terminal backends in the TUI.
  • Enhanced iOS with live Iroh debug transport modes and improved test workflow reliability.
  • Fixed critical bash shell integration errors affecting noclobber and ssh startup scripts.
  • Improved Iroh session diagnostics and direct UDP port publishing.

New

  • Browser terminal backend support in cmux-tui.
  • Live Iroh debug transport modes for iOS.
  • Ability to diagnose Iroh session path flaps by owner.
  • Signed direct UDP port publishing for Iroh.
  • Custom relay round-trip verification for Iroh.

Improved

  • Cmux-tui Alt+N pane distribution now matches Zellij behavior.
  • Iroh connection lifetime management and admission control.
  • Dock notifications are now cleared when the window is focused.
  • iOS workflow now fails when selected filter runs zero tests.
  • Destructive surface targets now fail closed for stale entries.

Fixed

  • Noclobber 'cannot overwrite existing file' error in bash shell integration.
  • CLAUDESECURESTORAGECONFIGDIR environment variable no longer lost across agent restore.
  • SSH startup script syntax error in no-progress retry loop.
  • Ghostty native Sentry disabled in embedded builds to prevent conflicts.

Summaries are written automatically from the official release notes (full changelog ↗); check the original notes before relying on a detail. Cmux: pricing, features and alternatives · All changelogs