diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 7090904d0..b3b6d857c 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -22,6 +22,7 @@
 ### Fixed
 
 - Fixed `startup.quiet` still rendering the `xdev: xd://: mounted …` status line when MCP tools connect; quiet startup now suppresses only the user-visible mount notice while retaining the hidden model-facing device update ([#5670](https://github.com/can1357/oh-my-pi/issues/5670)).
+- Fixed command error in `hub` tool with a non-POSIX shell ([#5682](https://github.com/can1357/oh-my-pi/pull/5682))
 
 ## [17.0.1] - 2026-07-16
 
diff --git a/packages/coding-agent/src/launch/broker.ts b/packages/coding-agent/src/launch/broker.ts
index c135d0656..264f753b4 100644
--- a/packages/coding-agent/src/launch/broker.ts
+++ b/packages/coding-agent/src/launch/broker.ts
@@ -3,7 +3,7 @@ import * as net from "node:net";
 import * as os from "node:os";
 import * as path from "node:path";
 import { Process, type PtyRunResult, PtySession } from "@oh-my-pi/pi-natives";
-import { isEexist, isEnoent, logger, postmortem, sanitizeText } from "@oh-my-pi/pi-utils";
+import { isEexist, isEnoent, logger, postmortem, procmgr, sanitizeText } from "@oh-my-pi/pi-utils";
 import { truncateHead, truncateHeadBytes, truncateTail, truncateTailBytes } from "../session/streaming-output";
 import { workerEnvFromParent } from "../subprocess/worker-client";
 import { daemonBrokerEndpoint } from "./paths";
@@ -555,7 +555,8 @@ class DaemonBroker {
 				`printf '%s' "$$" > ${quoteShellArg(pidPath)}`,
 				`exec ${argv.map(quoteShellArg).join(" ")}`,
 			].join("; ");
-			run = session.start({ command, shell: process.env.SHELL, ...options }, onChunk);
+			const shell = procmgr.getShellConfig().shell;
+			run = session.start({ command, shell, ...options }, onChunk);
 		}
 		void run
 			.then(result => this.#onPtyExit(record, generation, result))
diff --git a/packages/coding-agent/test/tools/launch.test.ts b/packages/coding-agent/test/tools/launch.test.ts
index df0bb0bda..3a05a40ed 100644
--- a/packages/coding-agent/test/tools/launch.test.ts
+++ b/packages/coding-agent/test/tools/launch.test.ts
@@ -42,6 +42,86 @@ async function shutdown(client: DaemonBrokerClient): Promise<void> {
 	client.close();
 }
 
+async function startPtyDaemonWithShell(shell: string, initialMarker: string, expectedMarker: string): Promise<void> {
+	const projectDir = await tempDir("omp-daemon-shell-project-");
+	const runtimeDir = await tempDir("omp-daemon-shell-runtime-");
+	const runner = `
+		import { createDaemonBrokerClient } from "./src/launch/client";
+
+		const projectDir = ${JSON.stringify(projectDir)};
+		const runtimeDir = ${JSON.stringify(runtimeDir)};
+		const expectedMarker = ${JSON.stringify(expectedMarker)};
+		const client = await createDaemonBrokerClient(projectDir, {
+			runtimeDir,
+			idleGraceMs: 5_000,
+		});
+		try {
+			const started = await client.request({
+				op: "start",
+				spec: {
+					name: "shell",
+					application: process.execPath,
+					args: [
+						"-e",
+						"process.stdout.write(process.env.OMP_TEST_SHELL_MARKER); process.stdout.write(String.fromCharCode(10)); process.stdin.resume();",
+					],
+					env: {},
+					cwd: projectDir,
+					pty: true,
+					ready: { log: expectedMarker, timeoutMs: 5_000 },
+					restart: "no",
+					persist: false,
+					detached: false,
+				},
+				owner: "shell-test",
+			});
+			if (started.op !== "start") throw new Error("unexpected start response");
+			if (started.daemon.state !== "ready") {
+				const logs = await client.request({
+					op: "logs",
+					name: "shell",
+					lines: 20,
+					head: false,
+					follow: false,
+					timeoutMs: 1_000,
+				});
+				throw new Error(
+					"daemon did not become ready: " +
+						(started.daemon.exitReason ?? "unknown error") +
+						"; logs: " +
+						(logs.op === "logs" ? logs.text : "unavailable"),
+				);
+			}
+			process.stdout.write(JSON.stringify({ state: started.daemon.state, readyTimedOut: started.readyTimedOut }));
+			await client.request({ op: "stop", name: "shell", timeoutMs: 2_000 });
+		} finally {
+			try {
+				await client.request({ op: "shutdown" });
+			} catch {
+				// A last-client shutdown may already have closed the broker.
+			}
+			client.close();
+		}
+	`;
+	const child = Bun.spawn([process.execPath, "--eval", runner], {
+		cwd: path.resolve(import.meta.dir, "../.."),
+		env: {
+			...process.env,
+			SHELL: shell,
+			OMP_TEST_SHELL_MARKER: initialMarker,
+		},
+		stdout: "pipe",
+		stderr: "pipe",
+	});
+	const [exitCode, stdout, stderr] = await Promise.all([
+		child.exited,
+		new Response(child.stdout).text(),
+		new Response(child.stderr).text(),
+	]);
+	expect({ exitCode, stderr }).toEqual({ exitCode: 0, stderr: "" });
+	expect(JSON.parse(stdout)).toEqual({ state: "ready", readyTimedOut: false });
+}
+
 afterEach(async () => {
 	while (cleanupDirs.length > 0) {
 		const dir = cleanupDirs.pop();
@@ -133,6 +213,24 @@ setInterval(() => {}, 1000);
 		}
 	}, 20_000);
 
+	it("uses a basic shell when the login shell cannot run POSIX commands", async () => {
+		if (process.platform === "win32") return;
+		const shellPath = path.join(await tempDir("omp-daemon-nonposix-shell-"), "csh");
+		await Bun.write(shellPath, "#!/bin/sh\nexit 1\n");
+		await fs.chmod(shellPath, 0o755);
+
+		await startPtyDaemonWithShell(shellPath, "basic-shell", "basic-shell");
+	}, 20_000);
+
+	it("preserves compatible login shells for PTY daemons", async () => {
+		if (process.platform === "win32") return;
+		const shellPath = path.join(await tempDir("omp-daemon-posix-shell-"), "zsh");
+		await Bun.write(shellPath, '#!/bin/sh\nexport OMP_TEST_SHELL_MARKER="compatible-shell"\nexec /bin/sh "$@"\n');
+		await fs.chmod(shellPath, 0o755);
+
+		await startPtyDaemonWithShell(shellPath, "basic-shell", "compatible-shell");
+	}, 20_000);
+
 	it("stops non-persistent daemons after the last project omp exits", async () => {
 		const projectDir = await tempDir("omp-daemon-exit-project-");
 		const runtimeDir = await tempDir("omp-daemon-exit-runtime-");