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fix(tmux): replace pane-exited with after-kill-pane; enforce width on pane close #40

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fix(tmux): replace pane-exited with after-kill-pane; enforce width on pane close #40

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da8ff4a
fix(tmux): enforce sidebar width after pane close
kanlac May 6, 2026
c639325
fix(tmux): replace pane-exited with after-kill-pane hook
kanlac May 6, 2026
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7 changes: 4 additions & 3 deletions packages/mux/providers/tmux/src/provider.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -106,9 +106,10 @@ export class TmuxProvider implements MuxProviderV1, WindowCapable, SidebarCapabl
tmux.setGlobalHook("after-new-window", ensureCmd);
// client-resized: terminal window changed size — enforce stored width back
tmux.setGlobalHook("client-resized", clientResizedCmd);
// pane-exited: a pane closed — kill orphaned sidebar panes (only pane left in window)
// after-kill-pane: a pane was killed — clean up orphaned sidebars and
// re-enforce width (pane-exited is not recognised by tmux 3.4+)
const paneExitedCmd = hookPost("/pane-exited");
tmux.setGlobalHook("pane-exited", paneExitedCmd);
tmux.setGlobalHook("after-kill-pane", paneExitedCmd);
}

cleanupHooks(): void {
Expand All @@ -118,7 +119,7 @@ export class TmuxProvider implements MuxProviderV1, WindowCapable, SidebarCapabl
tmux.unsetGlobalHook("after-select-window");
tmux.unsetGlobalHook("after-new-window");
tmux.unsetGlobalHook("client-resized");
tmux.unsetGlobalHook("pane-exited");
tmux.unsetGlobalHook("after-kill-pane");
}

getAllPaneCounts(): Map<string, number> {
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1 change: 1 addition & 0 deletions packages/mux/tmux-sdk/src/index.ts
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Expand Up @@ -102,6 +102,7 @@ export const HOOK_NAMES = [
"window-layout-changed",
"after-select-window",
"after-new-window",
"after-kill-pane",
"after-resize-pane",
"pane-died",
"pane-exited",
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4 changes: 3 additions & 1 deletion packages/runtime/src/server/index.ts
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Expand Up @@ -2285,13 +2285,15 @@ export function startServer(mux: MuxProvider, extraProviders?: MuxProvider[], wa
return new Response("ok", { status: 200 });
}

// pane-exited hook: a pane closed — kill orphaned sidebar panes
// pane-exited hook: a pane closed — kill orphaned sidebar panes and
// re-enforce sidebar width (tmux redistributes space when panes close)
if (req.method === "POST" && url.pathname === "/pane-exited") {
if (isSidebarVisible()) {
invalidateSidebarPaneCache();
for (const { provider } of listSidebarPanesByProvider()) {
provider.killOrphanedSidebarPanes();
}
scheduleClientResizeSync();
}
return new Response("ok", { status: 200 });
}
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