From c1faa421ea2219eb647b07e16e4d502f30ee026a Mon Sep 17 00:00:00 2001
From: Michael Yong <wrong92@gmail.com>
Date: Fri, 11 Sep 2026 15:15:12 -0700
Subject: [PATCH] fix: restore stdin EOF for environment hooks

---
 .../src/environment-lifecycle-script.test.ts  | 25 +++++++++++++++++++
 .../src/environment-lifecycle-script.ts       |  4 +--
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/apps/host-daemon/src/environment-lifecycle-script.test.ts b/apps/host-daemon/src/environment-lifecycle-script.test.ts
index 47efe2686d..bb73e297b2 100644
--- a/apps/host-daemon/src/environment-lifecycle-script.test.ts
+++ b/apps/host-daemon/src/environment-lifecycle-script.test.ts
@@ -30,6 +30,31 @@ afterEach(async () => {
 });
 
 describe("core environment scripts", () => {
+  it.each(["setup", "teardown"] as const)(
+    "supplies stdin EOF so %s continues to completion",
+    async (kind) => {
+      const workspacePath = await workspace(
+        kind,
+        'cat >/dev/null\nprintf complete > marker\nprintf "\\342"\nsleep 0.05\nprintf "\\234\\223\\n"\nprintf "done\\n" >&2\n',
+      );
+      const output: string[] = [];
+      const run = kind === "setup" ? runSetupScript : runTeardownScript;
+      const result = await run({
+        workspacePath,
+        timeoutMs: 1000,
+        env: { PATH: "/usr/bin:/bin" },
+        onProgress: (entry) => output.push(entry.text),
+      });
+      expect(result).toMatchObject({ ran: true, exitCode: 0 });
+      expect(await readFile(join(workspacePath, "marker"), "utf8")).toBe(
+        "complete",
+      );
+      expect(output).toContain("✓");
+      expect(output).toContain("done");
+      expect(result.output).toContain("✓\n");
+    },
+  );
+
   it("runs in the environment directory and streams stdout and stderr", async () => {
     const workspacePath = await workspace(
       "setup",
diff --git a/apps/host-daemon/src/environment-lifecycle-script.ts b/apps/host-daemon/src/environment-lifecycle-script.ts
index 24e3123ec6..4637a625b9 100644
--- a/apps/host-daemon/src/environment-lifecycle-script.ts
+++ b/apps/host-daemon/src/environment-lifecycle-script.ts
@@ -4,7 +4,7 @@ import type { HostDaemonContributedEnvEntry } from "@bb/host-daemon-contract";
 import {
   isProcessGroupAlive,
   killProcessGroup,
-  spawnPortablePipedProcess,
+  spawnPortableOutputProcess,
   supportsProcessGroups,
 } from "@bb/process-utils";
 import fs from "node:fs/promises";
@@ -133,7 +133,7 @@ async function runLifecycleScript(
     },
     true,
   );
-  const child = spawnPortablePipedProcess({
+  const child = spawnPortableOutputProcess({
     command: command.command,
     args: command.args,
     cwd: args.workspacePath,