tmux 3.6
LatestNovember 26, 2025
Highlights
Scrollbars Support
New pane-scrollbars option enables visual scrollbars in panes for easier navigation through long output.
Mode 2031 Theme Support
Enhanced theming capabilities with Mode 2031 support for more consistent terminal colors.
Improved Format Operators
Boolean expressions, #? operator, and sorting for loop operators provide more powerful formatting options.
Pixel Size Queries
Ability to send pixel size queries for better integration with graphical terminal features.
Clipboard Support Querying
New capability to query clipboard support from terminals for improved copy/paste workflows.
State Reporting
Support for reporting cursor, mouse, paste, and focus state for enhanced terminal awareness.
Changes
- OSC 4 palette queries are now forwarded to applications
- New variables for buffers, sessions, and cursor styles
- Prompt cursor colour and style options added
- Improved terminal capability detection
- Various bug fixes and performance improvements
⚠️ Upgrade Notes
- • Important: Restart tmux entirely after upgrading (kill all sessions)
- • If you see "open terminal failed: not a terminal" when attaching, restart tmux completely
- • The sixel library protocol has changed, requiring a full restart