Miguel PalhasandClaude Opus 5
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Every attached client pushed its own dimensions straight to `tmux resize-window`, so two clients of different sizes resized the shared window past each other on every report — 198 resizes in 90 seconds on a four-session daemon. Each flip repaints a full-screen agent at a new height and orphans the rows it drew at the old one, leaving a stale input box the operator types into and reads as a stuck pane. The window now goes to the smallest attached client per axis, tmux's own rule for multiple clients, and only when that size actually changes. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>