fix(interactive-subagents): harden parallel lifecycle delivery

2026-09-03 23:40:14 -04:00
parent d99dbce93d
commit 7a1043e5e0
11 changed files with 848 additions and 131 deletions
@@ -112,8 +112,27 @@ export async function readScreenAsync(surface: string, lines = 50): Promise<stri
  return stdout;
 }

+export async function isSurfaceAlive(surface: string, signal?: AbortSignal): Promise<boolean> {
+  requireTmux();
+  try {
+    await execFileAsync("tmux", ["display-message", "-p", "-t", surface, "#{pane_id}"], {
+      encoding: "utf8",
+      timeout: 5_000,
+      killSignal: "SIGKILL",
+      signal,
+    });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
 export function closeSurface(surface: string): void {
  requireTmux();
-  execFileSync("tmux", ["kill-pane", "-t", surface], { encoding: "utf8" });
+  try {
+    execFileSync("tmux", ["kill-pane", "-t", surface], { encoding: "utf8" });
+  } catch {
+    // Replaced-shell launches may close their own pane before cleanup.
+  }
  rebalanceSurfaces();
 }