diff --git a/packages/coding-agent/src/ssh/connection-manager.ts b/packages/coding-agent/src/ssh/connection-manager.ts
index 9658cebff..81158887a 100644
--- a/packages/coding-agent/src/ssh/connection-manager.ts
+++ b/packages/coding-agent/src/ssh/connection-manager.ts
@@ -68,6 +68,7 @@ async function validateKeyPermissions(keyPath?: string): Promise<void> {
 
 function buildCommonArgs(host: SSHConnectionTarget): string[] {
 	const args = [
+		"-n",
 		"-o",
 		"ControlMaster=auto",
 		"-o",
diff --git a/packages/coding-agent/test/ssh/connection-manager.test.ts b/packages/coding-agent/test/ssh/connection-manager.test.ts
new file mode 100644
index 000000000..655e602c2
--- /dev/null
+++ b/packages/coding-agent/test/ssh/connection-manager.test.ts
@@ -0,0 +1,19 @@
+import { describe, expect, it } from "bun:test";
+import { buildRemoteCommand } from "../../src/ssh/connection-manager";
+
+describe("buildRemoteCommand", () => {
+	it("includes -n to bind stdin to /dev/null for mux channel opens", async () => {
+		const args = await buildRemoteCommand(
+			{
+				name: "host",
+				host: "192.168.3.146",
+			},
+			"ls -la",
+		);
+
+		expect(args[0]).toBe("-n");
+		expect(args).toContain("ControlMaster=auto");
+		expect(args.at(-2)).toBe("192.168.3.146");
+		expect(args.at(-1)).toBe("ls -la");
+	});
+});