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Changelog

#cmux 0.64.12: Diff Viewer Shortcut, Markdown Zoom, Prompt & Remote SSH Fixes

Diff Viewer Shortcut. Open the diff viewer with a keyboard shortcut, configurable and editable in Settings alongside every other cmux shortcut.

Markdown Viewer Zoom. The Markdown viewer gains font size and zoom controls, so you can scale rendered docs up or down without leaving the pane.

Feed Behind Beta Features. The Feed is now gated behind Beta Features and off by default, mirroring how the Dock is gated, so it only appears when you opt in.

Prompt & Remote SSH Fixes. Starship and other custom bash prompts no longer go static: the prompt bootstrap composes with your existing PROMPT_COMMAND instead of overwriting it. And `cmux ssh` now reports remote PTY allocation failures loudly instead of failing silently when a plain ssh would have worked.

Restored Sidebar Views & Scrollback Colors. The right-click sidebar view switcher and built-in views (Default Workspaces, Project Worktrees, and others) are back after a 0.64.11 regression. Restored session scrollback no longer keeps a previous theme's colors, fixing white-on-white history after a theme change.

Added
  • Configurable keyboard shortcut to open the diff viewer, editable in Settings (#5178)
  • Font size and zoom controls in the Markdown viewer (#5163)
Changed
  • Gate the Feed behind Beta Features (mirroring Dock), off by default (#5174)
  • Improve the terminal text context menu (#5135) -- thanks @azooz2003-bit!
  • Rank visible title matches above hidden metadata in the workspace switcher (#5148)
  • Build the release app with the macOS 26 SDK (#5042)
Fixed
  • Fix Starship and other custom prompts going static in bash by composing the prompt bootstrap with the user's existing PROMPT_COMMAND (#5187) -- thanks @xzjncu for the report!
  • Report remote PTY allocation failures loudly so cmux ssh no longer fails silently when remote PTY attach fails (#5186) -- thanks @windyslow for the report!
  • Fix a main-thread hang from focus-surface broadcast re-entrancy triggered by custom shortcuts (#5108) -- thanks @wzh4464 for the report!
  • Restore the right-click sidebar view switcher and built-in views (Default Workspaces, Project Worktrees, and others) (#5182)
  • Strip terminal-color OSC sequences from restored scrollback so old sessions no longer keep a previous theme's colors (white-on-white after a theme change) (#5175)
  • Fix the browser Web Inspector reopening by itself after manual close and navigation (#5180)
  • Honor the Settings rebinding of Global Search by parsing package object-form cmux.json shortcut bindings (#5143)
  • Fix Claude fork and resume failing when the session had changed directories (#5154)
  • Fix titlebar shortcut-hint pills clipped at the bottom on macOS 26.5 (#5145)
  • Fall back to the default sidebar when extensions are disabled (#5127) -- thanks @azooz2003-bit!
  • Stabilize the git metadata FSEvents watcher to stop an event storm (#5131) -- thanks @azooz2003-bit! and @randybias for the report!
  • Avoid E2BIG when the SSH startup script exceeds MAX_ARG_STRLEN (#5133) -- thanks @lauzierj!