Right-clicking a pane opened tmux's menu, whose Split entries left a stray pane next to Claude (and whose Kill entries could end it). Unbind the right-click menus; add --unsplit and a palette entry that closes extra panes and keeps Claude's. Closes #52 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WHRLCCdXYm41Qx5kNhehaP