From c47233a4743f1ba9bd46c3c1a664ad57813a6f11 Mon Sep 17 00:00:00 2001
From: euxaristia <25621994+euxaristia@users.noreply.github.com>
Date: Tue, 21 Apr 2026 16:01:28 -0400
Subject: [PATCH] fix(core): disable detached mode in Bun to prevent immediate
 SIGHUP of child processes (#22620)

---
 packages/core/src/services/shellExecutionService.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/packages/core/src/services/shellExecutionService.ts b/packages/core/src/services/shellExecutionService.ts
index 4fbee62e2f..93c55f0636 100644
--- a/packages/core/src/services/shellExecutionService.ts
+++ b/packages/core/src/services/shellExecutionService.ts
@@ -531,12 +531,18 @@ export class ShellExecutionService {
         cwd: finalCwd,
       } = prepared;
 
+      // Bun's child_process does not properly call setsid() for detached
+      // processes, leaving children in the parent's session without a
+      // controlling terminal. They receive SIGHUP immediately. Disable
+      // detached mode in Bun; killProcessGroup already falls back to
+      // direct-pid kill when the group kill fails.
+      const isBun = 'bun' in process.versions;
       const child = cpSpawn(finalExecutable, finalArgs, {
         cwd: finalCwd,
         stdio: ['ignore', 'pipe', 'pipe'],
         windowsVerbatimArguments: isWindows ? false : undefined,
         shell: false,
-        detached: !isWindows,
+        detached: !isWindows && !isBun,
         env: finalEnv,
       });