- T-45 cancelled: tmux detect/install gate is obsolete — D-77/D-78 moved the Claude pane off tmux to the stream-json control protocol + --resume. - T-57: noted it applies to both the left sidebar and right context-bar rails, and that the left-most item opens by default. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>