diff --git a/gateway/platforms/feishu.py b/gateway/platforms/feishu.py
index 16f5467b2..7fce74def 100644
--- a/gateway/platforms/feishu.py
+++ b/gateway/platforms/feishu.py
@@ -34,6 +34,9 @@ from datetime import datetime
 from pathlib import Path
 from types import SimpleNamespace
 from typing import Any, Dict, List, Optional
+from urllib.error import HTTPError, URLError
+from urllib.parse import urlencode
+from urllib.request import Request, urlopen
 
 # aiohttp/websockets are independent optional deps — import outside lark_oapi
 # so they remain available for tests and webhook mode even if lark_oapi is missing.
@@ -169,6 +172,19 @@ _FEISHU_CARD_ACTION_DEDUP_TTL_SECONDS = 15 * 60    # card action token dedup win
 _FEISHU_BOT_MSG_TRACK_SIZE = 512                   # LRU size for tracking sent message IDs
 _FEISHU_REPLY_FALLBACK_CODES = frozenset({230011, 231003})  # reply target withdrawn/missing → create fallback
 _FEISHU_ACK_EMOJI = "OK"
+
+# QR onboarding constants
+_ONBOARD_ACCOUNTS_URLS = {
+    "feishu": "https://accounts.feishu.cn",
+    "lark": "https://accounts.larksuite.com",
+}
+_ONBOARD_OPEN_URLS = {
+    "feishu": "https://open.feishu.cn",
+    "lark": "https://open.larksuite.com",
+}
+_REGISTRATION_PATH = "/oauth/v1/app/registration"
+_ONBOARD_REQUEST_TIMEOUT_S = 10
+
 # ---------------------------------------------------------------------------
 # Fallback display strings
 # ---------------------------------------------------------------------------
@@ -3621,3 +3637,328 @@ class FeishuAdapter(BasePlatformAdapter):
             return _FEISHU_FILE_UPLOAD_TYPE, "file"
 
         return _FEISHU_FILE_UPLOAD_TYPE, "file"
+
+
+# =============================================================================
+# QR scan-to-create onboarding
+#
+# Device-code flow: user scans a QR code with Feishu/Lark mobile app and the
+# platform creates a fully configured bot application automatically.
+# Called by `hermes gateway setup` via _setup_feishu() in hermes_cli/gateway.py.
+# =============================================================================
+
+
+def _accounts_base_url(domain: str) -> str:
+    return _ONBOARD_ACCOUNTS_URLS.get(domain, _ONBOARD_ACCOUNTS_URLS["feishu"])
+
+
+def _onboard_open_base_url(domain: str) -> str:
+    return _ONBOARD_OPEN_URLS.get(domain, _ONBOARD_OPEN_URLS["feishu"])
+
+
+def _post_registration(base_url: str, body: Dict[str, str]) -> dict:
+    """POST form-encoded data to the registration endpoint, return parsed JSON.
+
+    The registration endpoint returns JSON even on 4xx (e.g. poll returns
+    authorization_pending as a 400). We always parse the body regardless of
+    HTTP status.
+    """
+    url = f"{base_url}{_REGISTRATION_PATH}"
+    data = urlencode(body).encode("utf-8")
+    req = Request(url, data=data, headers={"Content-Type": "application/x-www-form-urlencoded"})
+    try:
+        with urlopen(req, timeout=_ONBOARD_REQUEST_TIMEOUT_S) as resp:
+            return json.loads(resp.read().decode("utf-8"))
+    except HTTPError as exc:
+        body_bytes = exc.read()
+        if body_bytes:
+            try:
+                return json.loads(body_bytes.decode("utf-8"))
+            except (ValueError, json.JSONDecodeError):
+                raise exc from None
+        raise
+
+
+def _init_registration(domain: str = "feishu") -> None:
+    """Verify the environment supports client_secret auth.
+
+    Raises RuntimeError if not supported.
+    """
+    base_url = _accounts_base_url(domain)
+    res = _post_registration(base_url, {"action": "init"})
+    methods = res.get("supported_auth_methods") or []
+    if "client_secret" not in methods:
+        raise RuntimeError(
+            f"Feishu / Lark registration environment does not support client_secret auth. "
+            f"Supported: {methods}"
+        )
+
+
+def _begin_registration(domain: str = "feishu") -> dict:
+    """Start the device-code flow. Returns device_code, qr_url, user_code, interval, expire_in."""
+    base_url = _accounts_base_url(domain)
+    res = _post_registration(base_url, {
+        "action": "begin",
+        "archetype": "PersonalAgent",
+        "auth_method": "client_secret",
+        "request_user_info": "open_id",
+    })
+    device_code = res.get("device_code")
+    if not device_code:
+        raise RuntimeError("Feishu / Lark registration did not return a device_code")
+    qr_url = res.get("verification_uri_complete", "")
+    if "?" in qr_url:
+        qr_url += "&from=hermes&tp=hermes"
+    else:
+        qr_url += "?from=hermes&tp=hermes"
+    return {
+        "device_code": device_code,
+        "qr_url": qr_url,
+        "user_code": res.get("user_code", ""),
+        "interval": res.get("interval") or 5,
+        "expire_in": res.get("expire_in") or 600,
+    }
+
+
+def _poll_registration(
+    *,
+    device_code: str,
+    interval: int,
+    expire_in: int,
+    domain: str = "feishu",
+) -> Optional[dict]:
+    """Poll until the user scans the QR code, or timeout/denial.
+
+    Returns dict with app_id, app_secret, domain, open_id on success.
+    Returns None on failure.
+    """
+    deadline = time.time() + expire_in
+    current_domain = domain
+    domain_switched = False
+    poll_count = 0
+
+    while time.time() < deadline:
+        base_url = _accounts_base_url(current_domain)
+        try:
+            res = _post_registration(base_url, {
+                "action": "poll",
+                "device_code": device_code,
+                "tp": "ob_app",
+            })
+        except (URLError, OSError, json.JSONDecodeError):
+            time.sleep(interval)
+            continue
+
+        poll_count += 1
+        if poll_count == 1:
+            print("  Fetching configuration results...", end="", flush=True)
+        elif poll_count % 6 == 0:
+            print(".", end="", flush=True)
+
+        # Domain auto-detection
+        user_info = res.get("user_info") or {}
+        tenant_brand = user_info.get("tenant_brand")
+        if tenant_brand == "lark" and not domain_switched:
+            current_domain = "lark"
+            domain_switched = True
+            # Fall through — server may return credentials in this same response.
+
+        # Success
+        if res.get("client_id") and res.get("client_secret"):
+            if poll_count > 0:
+                print()  # newline after "Fetching configuration results..." dots
+            return {
+                "app_id": res["client_id"],
+                "app_secret": res["client_secret"],
+                "domain": current_domain,
+                "open_id": user_info.get("open_id"),
+            }
+
+        # Terminal errors
+        error = res.get("error", "")
+        if error in ("access_denied", "expired_token"):
+            if poll_count > 0:
+                print()
+            logger.warning("[Feishu onboard] Registration %s", error)
+            return None
+
+        # authorization_pending or unknown — keep polling
+        time.sleep(interval)
+
+    if poll_count > 0:
+        print()
+    logger.warning("[Feishu onboard] Poll timed out after %ds", expire_in)
+    return None
+
+
+try:
+    import qrcode as _qrcode_mod
+except (ImportError, TypeError):
+    _qrcode_mod = None  # type: ignore[assignment]
+
+
+def _render_qr(url: str) -> bool:
+    """Try to render a QR code in the terminal. Returns True if successful."""
+    if _qrcode_mod is None:
+        return False
+    try:
+        qr = _qrcode_mod.QRCode()
+        qr.add_data(url)
+        qr.make(fit=True)
+        qr.print_ascii(invert=True)
+        return True
+    except Exception:
+        return False
+
+
+def probe_bot(app_id: str, app_secret: str, domain: str) -> Optional[dict]:
+    """Verify bot connectivity via /open-apis/bot/v3/info.
+
+    Uses lark_oapi SDK when available, falls back to raw HTTP otherwise.
+    Returns {"bot_name": ..., "bot_open_id": ...} on success, None on failure.
+    """
+    if FEISHU_AVAILABLE:
+        return _probe_bot_sdk(app_id, app_secret, domain)
+    return _probe_bot_http(app_id, app_secret, domain)
+
+
+def _build_onboard_client(app_id: str, app_secret: str, domain: str) -> Any:
+    """Build a lark Client for the given credentials and domain."""
+    sdk_domain = LARK_DOMAIN if domain == "lark" else FEISHU_DOMAIN
+    return (
+        lark.Client.builder()
+        .app_id(app_id)
+        .app_secret(app_secret)
+        .domain(sdk_domain)
+        .log_level(lark.LogLevel.WARNING)
+        .build()
+    )
+
+
+def _parse_bot_response(data: dict) -> Optional[dict]:
+    """Extract bot_name and bot_open_id from a /bot/v3/info response."""
+    if data.get("code") != 0:
+        return None
+    bot = data.get("bot") or data.get("data", {}).get("bot") or {}
+    return {
+        "bot_name": bot.get("bot_name"),
+        "bot_open_id": bot.get("open_id"),
+    }
+
+
+def _probe_bot_sdk(app_id: str, app_secret: str, domain: str) -> Optional[dict]:
+    """Probe bot info using lark_oapi SDK."""
+    try:
+        client = _build_onboard_client(app_id, app_secret, domain)
+        resp = client.request(
+            method="GET",
+            url="/open-apis/bot/v3/info",
+            body=None,
+            raw_response=True,
+        )
+        return _parse_bot_response(json.loads(resp.content))
+    except Exception as exc:
+        logger.debug("[Feishu onboard] SDK probe failed: %s", exc)
+        return None
+
+
+def _probe_bot_http(app_id: str, app_secret: str, domain: str) -> Optional[dict]:
+    """Fallback probe using raw HTTP (when lark_oapi is not installed)."""
+    base_url = _onboard_open_base_url(domain)
+    try:
+        token_data = json.dumps({"app_id": app_id, "app_secret": app_secret}).encode("utf-8")
+        token_req = Request(
+            f"{base_url}/open-apis/auth/v3/tenant_access_token/internal",
+            data=token_data,
+            headers={"Content-Type": "application/json"},
+        )
+        with urlopen(token_req, timeout=_ONBOARD_REQUEST_TIMEOUT_S) as resp:
+            token_res = json.loads(resp.read().decode("utf-8"))
+
+        access_token = token_res.get("tenant_access_token")
+        if not access_token:
+            return None
+
+        bot_req = Request(
+            f"{base_url}/open-apis/bot/v3/info",
+            headers={
+                "Authorization": f"Bearer {access_token}",
+                "Content-Type": "application/json",
+            },
+        )
+        with urlopen(bot_req, timeout=_ONBOARD_REQUEST_TIMEOUT_S) as resp:
+            bot_res = json.loads(resp.read().decode("utf-8"))
+
+        return _parse_bot_response(bot_res)
+    except (URLError, OSError, KeyError, json.JSONDecodeError) as exc:
+        logger.debug("[Feishu onboard] HTTP probe failed: %s", exc)
+        return None
+
+
+def qr_register(
+    *,
+    initial_domain: str = "feishu",
+    timeout_seconds: int = 600,
+) -> Optional[dict]:
+    """Run the Feishu / Lark scan-to-create QR registration flow.
+
+    Returns on success::
+
+        {
+            "app_id": str,
+            "app_secret": str,
+            "domain": "feishu" | "lark",
+            "open_id": str | None,
+            "bot_name": str | None,
+            "bot_open_id": str | None,
+        }
+
+    Returns None on expected failures (network, auth denied, timeout).
+    Unexpected errors (bugs, protocol regressions) propagate to the caller.
+    """
+    try:
+        return _qr_register_inner(initial_domain=initial_domain, timeout_seconds=timeout_seconds)
+    except (RuntimeError, URLError, OSError, json.JSONDecodeError) as exc:
+        logger.warning("[Feishu onboard] Registration failed: %s", exc)
+        return None
+
+
+def _qr_register_inner(
+    *,
+    initial_domain: str,
+    timeout_seconds: int,
+) -> Optional[dict]:
+    """Run init → begin → poll → probe. Raises on network/protocol errors."""
+    print("  Connecting to Feishu / Lark...", end="", flush=True)
+    _init_registration(initial_domain)
+    begin = _begin_registration(initial_domain)
+    print(" done.")
+
+    print()
+    qr_url = begin["qr_url"]
+    if _render_qr(qr_url):
+        print(f"\n  Scan the QR code above, or open this URL directly:\n  {qr_url}")
+    else:
+        print(f"  Open this URL in Feishu / Lark on your phone:\n\n  {qr_url}\n")
+        print("  Tip: pip install qrcode  to display a scannable QR code here next time")
+    print()
+
+    result = _poll_registration(
+        device_code=begin["device_code"],
+        interval=begin["interval"],
+        expire_in=min(begin["expire_in"], timeout_seconds),
+        domain=initial_domain,
+    )
+    if not result:
+        return None
+
+    # Probe bot — best-effort, don't fail the registration
+    bot_info = probe_bot(result["app_id"], result["app_secret"], result["domain"])
+    if bot_info:
+        result["bot_name"] = bot_info.get("bot_name")
+        result["bot_open_id"] = bot_info.get("bot_open_id")
+    else:
+        result["bot_name"] = None
+        result["bot_open_id"] = None
+
+    return result
diff --git a/hermes_cli/gateway.py b/hermes_cli/gateway.py
index 908d8992a..a0a4d6735 100644
--- a/hermes_cli/gateway.py
+++ b/hermes_cli/gateway.py
@@ -2290,6 +2290,183 @@ def _setup_weixin():
         print_info(f"  User ID: {user_id}")
 
 
+def _setup_feishu():
+    """Interactive setup for Feishu / Lark — scan-to-create or manual credentials."""
+    print()
+    print(color("  ─── 🪽 Feishu / Lark Setup ───", Colors.CYAN))
+
+    existing_app_id = get_env_value("FEISHU_APP_ID")
+    existing_secret = get_env_value("FEISHU_APP_SECRET")
+    if existing_app_id and existing_secret:
+        print()
+        print_success("Feishu / Lark is already configured.")
+        if not prompt_yes_no("  Reconfigure Feishu / Lark?", False):
+            return
+
+    # ── Choose setup method ──
+    print()
+    method_choices = [
+        "Scan QR code to create a new bot automatically (recommended)",
+        "Enter existing App ID and App Secret manually",
+    ]
+    method_idx = prompt_choice("  How would you like to set up Feishu / Lark?", method_choices, 0)
+
+    credentials = None
+    used_qr = False
+
+    if method_idx == 0:
+        # ── QR scan-to-create ──
+        try:
+            from gateway.platforms.feishu import qr_register
+        except Exception as exc:
+            print_error(f"  Feishu / Lark onboard import failed: {exc}")
+            qr_register = None
+
+        if qr_register is not None:
+            try:
+                credentials = qr_register()
+            except KeyboardInterrupt:
+                print()
+                print_warning("  Feishu / Lark setup cancelled.")
+                return
+            except Exception as exc:
+                print_warning(f"  QR registration failed: {exc}")
+        if credentials:
+            used_qr = True
+        if not credentials:
+            print_info("  QR setup did not complete. Continuing with manual input.")
+
+    # ── Manual credential input ──
+    if not credentials:
+        print()
+        print_info("  Go to https://open.feishu.cn/ (or https://open.larksuite.com/ for Lark)")
+        print_info("  Create an app, enable the Bot capability, and copy the credentials.")
+        print()
+        app_id = prompt("  App ID", password=False)
+        if not app_id:
+            print_warning("  Skipped — Feishu / Lark won't work without an App ID.")
+            return
+        app_secret = prompt("  App Secret", password=True)
+        if not app_secret:
+            print_warning("  Skipped — Feishu / Lark won't work without an App Secret.")
+            return
+
+        domain_choices = ["feishu (China)", "lark (International)"]
+        domain_idx = prompt_choice("  Domain", domain_choices, 0)
+        domain = "lark" if domain_idx == 1 else "feishu"
+
+        # Try to probe the bot with manual credentials
+        bot_name = None
+        try:
+            from gateway.platforms.feishu import probe_bot
+            bot_info = probe_bot(app_id, app_secret, domain)
+            if bot_info:
+                bot_name = bot_info.get("bot_name")
+                print_success(f"  Credentials verified — bot: {bot_name or 'unnamed'}")
+            else:
+                print_warning("  Could not verify bot connection. Credentials saved anyway.")
+        except Exception as exc:
+            print_warning(f"  Credential verification skipped: {exc}")
+
+        credentials = {
+            "app_id": app_id,
+            "app_secret": app_secret,
+            "domain": domain,
+            "open_id": None,
+            "bot_name": bot_name,
+        }
+
+    # ── Save core credentials ──
+    app_id = credentials["app_id"]
+    app_secret = credentials["app_secret"]
+    domain = credentials.get("domain", "feishu")
+    open_id = credentials.get("open_id")
+    bot_name = credentials.get("bot_name")
+
+    save_env_value("FEISHU_APP_ID", app_id)
+    save_env_value("FEISHU_APP_SECRET", app_secret)
+    save_env_value("FEISHU_DOMAIN", domain)
+    # Bot identity is resolved at runtime via _hydrate_bot_identity().
+
+    # ── Connection mode ──
+    if used_qr:
+        connection_mode = "websocket"
+    else:
+        print()
+        mode_choices = [
+            "WebSocket (recommended — no public URL needed)",
+            "Webhook (requires a reachable HTTP endpoint)",
+        ]
+        mode_idx = prompt_choice("  Connection mode", mode_choices, 0)
+        connection_mode = "webhook" if mode_idx == 1 else "websocket"
+        if connection_mode == "webhook":
+            print_info("  Webhook defaults: 127.0.0.1:8765/feishu/webhook")
+            print_info("  Override with FEISHU_WEBHOOK_HOST / FEISHU_WEBHOOK_PORT / FEISHU_WEBHOOK_PATH")
+            print_info("  For signature verification, set FEISHU_ENCRYPT_KEY and FEISHU_VERIFICATION_TOKEN")
+    save_env_value("FEISHU_CONNECTION_MODE", connection_mode)
+
+    if bot_name:
+        print()
+        print_success(f"  Bot created: {bot_name}")
+
+    # ── DM security policy ──
+    print()
+    access_choices = [
+        "Use DM pairing approval (recommended)",
+        "Allow all direct messages",
+        "Only allow listed user IDs",
+        "Disable direct messages",
+    ]
+    access_idx = prompt_choice("  How should direct messages be authorized?", access_choices, 0)
+    if access_idx == 0:
+        save_env_value("FEISHU_ALLOW_ALL_USERS", "false")
+        save_env_value("FEISHU_ALLOWED_USERS", "")
+        print_success("  DM pairing enabled.")
+        print_info("  Unknown users can request access; approve with `hermes pairing approve`.")
+    elif access_idx == 1:
+        save_env_value("FEISHU_ALLOW_ALL_USERS", "true")
+        save_env_value("FEISHU_ALLOWED_USERS", "")
+        print_warning("  Open DM access enabled for Feishu / Lark.")
+    elif access_idx == 2:
+        save_env_value("FEISHU_ALLOW_ALL_USERS", "false")
+        default_allow = open_id or ""
+        allowlist = prompt("  Allowed user IDs (comma-separated)", default_allow, password=False).replace(" ", "")
+        save_env_value("FEISHU_ALLOWED_USERS", allowlist)
+        print_success("  Allowlist saved.")
+    else:
+        save_env_value("FEISHU_ALLOW_ALL_USERS", "false")
+        save_env_value("FEISHU_ALLOWED_USERS", "")
+        print_warning("  Direct messages disabled.")
+
+    # ── Group policy ──
+    print()
+    group_choices = [
+        "Respond only when @mentioned in groups (recommended)",
+        "Disable group chats",
+    ]
+    group_idx = prompt_choice("  How should group chats be handled?", group_choices, 0)
+    if group_idx == 0:
+        save_env_value("FEISHU_GROUP_POLICY", "open")
+        print_info("  Group chats enabled (bot must be @mentioned).")
+    else:
+        save_env_value("FEISHU_GROUP_POLICY", "disabled")
+        print_info("  Group chats disabled.")
+
+    # ── Home channel ──
+    print()
+    home_channel = prompt("  Home chat ID (optional, for cron/notifications)", password=False)
+    if home_channel:
+        save_env_value("FEISHU_HOME_CHANNEL", home_channel)
+        print_success(f"  Home channel set to {home_channel}")
+
+    print()
+    print_success("🪽 Feishu / Lark configured!")
+    print_info(f"  App ID: {app_id}")
+    print_info(f"  Domain: {domain}")
+    if bot_name:
+        print_info(f"  Bot: {bot_name}")
+
+
 def _setup_signal():
     """Interactive setup for Signal messenger."""
     import shutil
@@ -2467,6 +2644,8 @@ def gateway_setup():
             _setup_signal()
         elif platform["key"] == "weixin":
             _setup_weixin()
+        elif platform["key"] == "feishu":
+            _setup_feishu()
         else:
             _setup_standard_platform(platform)
 
diff --git a/tests/gateway/test_feishu_onboard.py b/tests/gateway/test_feishu_onboard.py
new file mode 100644
index 000000000..cb998fa5a
--- /dev/null
+++ b/tests/gateway/test_feishu_onboard.py
@@ -0,0 +1,436 @@
+"""Tests for gateway.platforms.feishu — Feishu scan-to-create registration."""
+
+import json
+from unittest.mock import patch, MagicMock
+import pytest
+
+
+def _mock_urlopen(response_data, status=200):
+    """Create a mock for urllib.request.urlopen that returns JSON response_data."""
+    mock_response = MagicMock()
+    mock_response.read.return_value = json.dumps(response_data).encode("utf-8")
+    mock_response.status = status
+    mock_response.__enter__ = lambda s: s
+    mock_response.__exit__ = MagicMock(return_value=False)
+    return mock_response
+
+
+class TestPostRegistration:
+    """Tests for the low-level HTTP helper."""
+
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_post_registration_returns_parsed_json(self, mock_urlopen_fn):
+        from gateway.platforms.feishu import _post_registration
+
+        mock_urlopen_fn.return_value = _mock_urlopen({"nonce": "abc", "supported_auth_methods": ["client_secret"]})
+        result = _post_registration("https://accounts.feishu.cn", {"action": "init"})
+        assert result["nonce"] == "abc"
+        assert "client_secret" in result["supported_auth_methods"]
+
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_post_registration_sends_form_encoded_body(self, mock_urlopen_fn):
+        from gateway.platforms.feishu import _post_registration
+
+        mock_urlopen_fn.return_value = _mock_urlopen({})
+        _post_registration("https://accounts.feishu.cn", {"action": "init", "key": "val"})
+        call_args = mock_urlopen_fn.call_args
+        request = call_args[0][0]
+        body = request.data.decode("utf-8")
+        assert "action=init" in body
+        assert "key=val" in body
+        assert request.get_header("Content-type") == "application/x-www-form-urlencoded"
+
+
+class TestInitRegistration:
+    """Tests for the init step."""
+
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_init_succeeds_when_client_secret_supported(self, mock_urlopen_fn):
+        from gateway.platforms.feishu import _init_registration
+
+        mock_urlopen_fn.return_value = _mock_urlopen({
+            "nonce": "abc",
+            "supported_auth_methods": ["client_secret"],
+        })
+        _init_registration("feishu")
+
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_init_raises_when_client_secret_not_supported(self, mock_urlopen_fn):
+        from gateway.platforms.feishu import _init_registration
+
+        mock_urlopen_fn.return_value = _mock_urlopen({
+            "nonce": "abc",
+            "supported_auth_methods": ["other_method"],
+        })
+        with pytest.raises(RuntimeError, match="client_secret"):
+            _init_registration("feishu")
+
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_init_uses_lark_url_for_lark_domain(self, mock_urlopen_fn):
+        from gateway.platforms.feishu import _init_registration
+
+        mock_urlopen_fn.return_value = _mock_urlopen({
+            "nonce": "abc",
+            "supported_auth_methods": ["client_secret"],
+        })
+        _init_registration("lark")
+        call_args = mock_urlopen_fn.call_args
+        request = call_args[0][0]
+        assert "larksuite.com" in request.full_url
+
+
+class TestBeginRegistration:
+    """Tests for the begin step."""
+
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_begin_returns_device_code_and_qr_url(self, mock_urlopen_fn):
+        from gateway.platforms.feishu import _begin_registration
+
+        mock_urlopen_fn.return_value = _mock_urlopen({
+            "device_code": "dc_123",
+            "verification_uri_complete": "https://accounts.feishu.cn/qr/abc",
+            "user_code": "ABCD-1234",
+            "interval": 5,
+            "expire_in": 600,
+        })
+        result = _begin_registration("feishu")
+        assert result["device_code"] == "dc_123"
+        assert "qr_url" in result
+        assert "accounts.feishu.cn" in result["qr_url"]
+        assert result["user_code"] == "ABCD-1234"
+        assert result["interval"] == 5
+        assert result["expire_in"] == 600
+
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_begin_sends_correct_archetype(self, mock_urlopen_fn):
+        from gateway.platforms.feishu import _begin_registration
+
+        mock_urlopen_fn.return_value = _mock_urlopen({
+            "device_code": "dc_123",
+            "verification_uri_complete": "https://example.com/qr",
+            "user_code": "X",
+            "interval": 5,
+            "expire_in": 600,
+        })
+        _begin_registration("feishu")
+        request = mock_urlopen_fn.call_args[0][0]
+        body = request.data.decode("utf-8")
+        assert "archetype=PersonalAgent" in body
+        assert "auth_method=client_secret" in body
+
+
+class TestPollRegistration:
+    """Tests for the poll step."""
+
+    @patch("gateway.platforms.feishu.time")
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_poll_returns_credentials_on_success(self, mock_urlopen_fn, mock_time):
+        from gateway.platforms.feishu import _poll_registration
+
+        mock_time.time.side_effect = [0, 1]
+        mock_time.sleep = MagicMock()
+
+        mock_urlopen_fn.return_value = _mock_urlopen({
+            "client_id": "cli_app123",
+            "client_secret": "secret456",
+            "user_info": {"open_id": "ou_owner", "tenant_brand": "feishu"},
+        })
+        result = _poll_registration(
+            device_code="dc_123", interval=1, expire_in=60, domain="feishu"
+        )
+        assert result is not None
+        assert result["app_id"] == "cli_app123"
+        assert result["app_secret"] == "secret456"
+        assert result["domain"] == "feishu"
+        assert result["open_id"] == "ou_owner"
+
+    @patch("gateway.platforms.feishu.time")
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_poll_switches_domain_on_lark_tenant_brand(self, mock_urlopen_fn, mock_time):
+        from gateway.platforms.feishu import _poll_registration
+
+        mock_time.time.side_effect = [0, 1, 2]
+        mock_time.sleep = MagicMock()
+
+        pending_resp = _mock_urlopen({
+            "error": "authorization_pending",
+            "user_info": {"tenant_brand": "lark"},
+        })
+        success_resp = _mock_urlopen({
+            "client_id": "cli_lark",
+            "client_secret": "secret_lark",
+            "user_info": {"open_id": "ou_lark", "tenant_brand": "lark"},
+        })
+        mock_urlopen_fn.side_effect = [pending_resp, success_resp]
+
+        result = _poll_registration(
+            device_code="dc_123", interval=0, expire_in=60, domain="feishu"
+        )
+        assert result is not None
+        assert result["domain"] == "lark"
+
+    @patch("gateway.platforms.feishu.time")
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_poll_success_with_lark_brand_in_same_response(self, mock_urlopen_fn, mock_time):
+        """Credentials and lark tenant_brand in one response must not be discarded."""
+        from gateway.platforms.feishu import _poll_registration
+
+        mock_time.time.side_effect = [0, 1]
+        mock_time.sleep = MagicMock()
+
+        mock_urlopen_fn.return_value = _mock_urlopen({
+            "client_id": "cli_lark_direct",
+            "client_secret": "secret_lark_direct",
+            "user_info": {"open_id": "ou_lark_direct", "tenant_brand": "lark"},
+        })
+        result = _poll_registration(
+            device_code="dc_123", interval=1, expire_in=60, domain="feishu"
+        )
+        assert result is not None
+        assert result["app_id"] == "cli_lark_direct"
+        assert result["domain"] == "lark"
+        assert result["open_id"] == "ou_lark_direct"
+
+    @patch("gateway.platforms.feishu.time")
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_poll_returns_none_on_access_denied(self, mock_urlopen_fn, mock_time):
+        from gateway.platforms.feishu import _poll_registration
+
+        mock_time.time.side_effect = [0, 1]
+        mock_time.sleep = MagicMock()
+
+        mock_urlopen_fn.return_value = _mock_urlopen({
+            "error": "access_denied",
+        })
+        result = _poll_registration(
+            device_code="dc_123", interval=1, expire_in=60, domain="feishu"
+        )
+        assert result is None
+
+    @patch("gateway.platforms.feishu.time")
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_poll_returns_none_on_timeout(self, mock_urlopen_fn, mock_time):
+        from gateway.platforms.feishu import _poll_registration
+
+        mock_time.time.side_effect = [0, 999]
+        mock_time.sleep = MagicMock()
+
+        mock_urlopen_fn.return_value = _mock_urlopen({
+            "error": "authorization_pending",
+        })
+        result = _poll_registration(
+            device_code="dc_123", interval=1, expire_in=1, domain="feishu"
+        )
+        assert result is None
+
+
+class TestRenderQr:
+    """Tests for QR code terminal rendering."""
+
+    @patch("gateway.platforms.feishu._qrcode_mod", create=True)
+    def test_render_qr_returns_true_on_success(self, mock_qrcode_mod):
+        from gateway.platforms.feishu import _render_qr
+
+        mock_qr = MagicMock()
+        mock_qrcode_mod.QRCode.return_value = mock_qr
+        assert _render_qr("https://example.com/qr") is True
+        mock_qr.add_data.assert_called_once_with("https://example.com/qr")
+        mock_qr.make.assert_called_once_with(fit=True)
+        mock_qr.print_ascii.assert_called_once()
+
+    def test_render_qr_returns_false_when_qrcode_missing(self):
+        from gateway.platforms.feishu import _render_qr
+
+        with patch("gateway.platforms.feishu._qrcode_mod", None):
+            assert _render_qr("https://example.com/qr") is False
+
+
+class TestProbeBot:
+    """Tests for bot connectivity verification."""
+
+    def test_probe_returns_bot_info_on_success(self):
+        from gateway.platforms.feishu import probe_bot
+
+        with patch("gateway.platforms.feishu._probe_bot_sdk") as mock_sdk:
+            mock_sdk.return_value = {"bot_name": "TestBot", "bot_open_id": "ou_bot123"}
+            result = probe_bot("cli_app", "secret", "feishu")
+
+        assert result is not None
+        assert result["bot_name"] == "TestBot"
+        assert result["bot_open_id"] == "ou_bot123"
+
+    def test_probe_returns_none_on_failure(self):
+        from gateway.platforms.feishu import probe_bot
+
+        with patch("gateway.platforms.feishu._probe_bot_sdk") as mock_sdk:
+            mock_sdk.return_value = None
+            result = probe_bot("bad_id", "bad_secret", "feishu")
+
+        assert result is None
+
+    @patch("gateway.platforms.feishu.FEISHU_AVAILABLE", False)
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_http_fallback_when_sdk_unavailable(self, mock_urlopen_fn):
+        """Without lark_oapi, probe falls back to raw HTTP."""
+        from gateway.platforms.feishu import probe_bot
+
+        token_resp = _mock_urlopen({"code": 0, "tenant_access_token": "t-123"})
+        bot_resp = _mock_urlopen({"code": 0, "bot": {"bot_name": "HttpBot", "open_id": "ou_http"}})
+        mock_urlopen_fn.side_effect = [token_resp, bot_resp]
+
+        result = probe_bot("cli_app", "secret", "feishu")
+        assert result is not None
+        assert result["bot_name"] == "HttpBot"
+
+    @patch("gateway.platforms.feishu.FEISHU_AVAILABLE", False)
+    @patch("gateway.platforms.feishu.urlopen")
+    def test_http_fallback_returns_none_on_network_error(self, mock_urlopen_fn):
+        from gateway.platforms.feishu import probe_bot
+        from urllib.error import URLError
+
+        mock_urlopen_fn.side_effect = URLError("connection refused")
+        result = probe_bot("cli_app", "secret", "feishu")
+        assert result is None
+
+
+class TestQrRegister:
+    """Tests for the public qr_register entry point."""
+
+    @patch("gateway.platforms.feishu.probe_bot")
+    @patch("gateway.platforms.feishu._render_qr")
+    @patch("gateway.platforms.feishu._poll_registration")
+    @patch("gateway.platforms.feishu._begin_registration")
+    @patch("gateway.platforms.feishu._init_registration")
+    def test_qr_register_success_flow(
+        self, mock_init, mock_begin, mock_poll, mock_render, mock_probe
+    ):
+        from gateway.platforms.feishu import qr_register
+
+        mock_begin.return_value = {
+            "device_code": "dc_123",
+            "qr_url": "https://example.com/qr",
+            "user_code": "ABCD",
+            "interval": 1,
+            "expire_in": 60,
+        }
+        mock_poll.return_value = {
+            "app_id": "cli_app",
+            "app_secret": "secret",
+            "domain": "feishu",
+            "open_id": "ou_owner",
+        }
+        mock_probe.return_value = {"bot_name": "MyBot", "bot_open_id": "ou_bot"}
+
+        result = qr_register()
+        assert result is not None
+        assert result["app_id"] == "cli_app"
+        assert result["app_secret"] == "secret"
+        assert result["bot_name"] == "MyBot"
+        mock_init.assert_called_once()
+        mock_render.assert_called_once()
+
+    @patch("gateway.platforms.feishu._init_registration")
+    def test_qr_register_returns_none_on_init_failure(self, mock_init):
+        from gateway.platforms.feishu import qr_register
+
+        mock_init.side_effect = RuntimeError("not supported")
+        result = qr_register()
+        assert result is None
+
+    @patch("gateway.platforms.feishu._render_qr")
+    @patch("gateway.platforms.feishu._poll_registration")
+    @patch("gateway.platforms.feishu._begin_registration")
+    @patch("gateway.platforms.feishu._init_registration")
+    def test_qr_register_returns_none_on_poll_failure(
+        self, mock_init, mock_begin, mock_poll, mock_render
+    ):
+        from gateway.platforms.feishu import qr_register
+
+        mock_begin.return_value = {
+            "device_code": "dc_123",
+            "qr_url": "https://example.com/qr",
+            "user_code": "ABCD",
+            "interval": 1,
+            "expire_in": 60,
+        }
+        mock_poll.return_value = None
+
+        result = qr_register()
+        assert result is None
+
+    # -- Contract: expected errors → None, unexpected errors → propagate --
+
+    @patch("gateway.platforms.feishu._init_registration")
+    def test_qr_register_returns_none_on_network_error(self, mock_init):
+        """URLError (network down) is an expected failure → None."""
+        from gateway.platforms.feishu import qr_register
+        from urllib.error import URLError
+
+        mock_init.side_effect = URLError("DNS resolution failed")
+        result = qr_register()
+        assert result is None
+
+    @patch("gateway.platforms.feishu._init_registration")
+    def test_qr_register_returns_none_on_json_error(self, mock_init):
+        """Malformed server response is an expected failure → None."""
+        from gateway.platforms.feishu import qr_register
+
+        mock_init.side_effect = json.JSONDecodeError("bad json", "", 0)
+        result = qr_register()
+        assert result is None
+
+    @patch("gateway.platforms.feishu._init_registration")
+    def test_qr_register_propagates_unexpected_errors(self, mock_init):
+        """Bugs (e.g. AttributeError) must not be swallowed — they propagate."""
+        from gateway.platforms.feishu import qr_register
+
+        mock_init.side_effect = AttributeError("some internal bug")
+        with pytest.raises(AttributeError, match="some internal bug"):
+            qr_register()
+
+    # -- Negative paths: partial/malformed server responses --
+
+    @patch("gateway.platforms.feishu._render_qr")
+    @patch("gateway.platforms.feishu._begin_registration")
+    @patch("gateway.platforms.feishu._init_registration")
+    def test_qr_register_returns_none_when_begin_missing_device_code(
+        self, mock_init, mock_begin, mock_render
+    ):
+        """Server returns begin response without device_code → RuntimeError → None."""
+        from gateway.platforms.feishu import qr_register
+
+        mock_begin.side_effect = RuntimeError("Feishu registration did not return a device_code")
+        result = qr_register()
+        assert result is None
+
+    @patch("gateway.platforms.feishu.probe_bot")
+    @patch("gateway.platforms.feishu._render_qr")
+    @patch("gateway.platforms.feishu._poll_registration")
+    @patch("gateway.platforms.feishu._begin_registration")
+    @patch("gateway.platforms.feishu._init_registration")
+    def test_qr_register_succeeds_even_when_probe_fails(
+        self, mock_init, mock_begin, mock_poll, mock_render, mock_probe
+    ):
+        """Registration succeeds but probe fails → result with bot_name=None."""
+        from gateway.platforms.feishu import qr_register
+
+        mock_begin.return_value = {
+            "device_code": "dc_123",
+            "qr_url": "https://example.com/qr",
+            "user_code": "ABCD",
+            "interval": 1,
+            "expire_in": 60,
+        }
+        mock_poll.return_value = {
+            "app_id": "cli_app",
+            "app_secret": "secret",
+            "domain": "feishu",
+            "open_id": "ou_owner",
+        }
+        mock_probe.return_value = None  # probe failed
+
+        result = qr_register()
+        assert result is not None
+        assert result["app_id"] == "cli_app"
+        assert result["bot_name"] is None
+        assert result["bot_open_id"] is None
diff --git a/tests/gateway/test_setup_feishu.py b/tests/gateway/test_setup_feishu.py
new file mode 100644
index 000000000..0b977cde9
--- /dev/null
+++ b/tests/gateway/test_setup_feishu.py
@@ -0,0 +1,284 @@
+"""Tests for _setup_feishu() in hermes_cli/gateway.py.
+
+Verifies that the interactive setup writes env vars that correctly drive the
+Feishu adapter: credentials, connection mode, DM policy, and group policy.
+"""
+
+import os
+from unittest.mock import patch
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+def _run_setup_feishu(
+    *,
+    qr_result=None,
+    prompt_yes_no_responses=None,
+    prompt_choice_responses=None,
+    prompt_responses=None,
+    existing_env=None,
+):
+    """Run _setup_feishu() with mocked I/O and return the env vars that were saved.
+
+    Returns a dict of {env_var_name: value} for all save_env_value calls.
+    """
+    existing_env = existing_env or {}
+    prompt_yes_no_responses = list(prompt_yes_no_responses or [True])
+    # QR path: method(0), dm(0), group(0) — 3 choices (no connection mode)
+    # Manual path: method(1), domain(0), connection(0), dm(0), group(0) — 5 choices
+    prompt_choice_responses = list(prompt_choice_responses or [0, 0, 0])
+    prompt_responses = list(prompt_responses or [""])
+
+    saved_env = {}
+
+    def mock_save(name, value):
+        saved_env[name] = value
+
+    def mock_get(name):
+        return existing_env.get(name, "")
+
+    with patch("hermes_cli.gateway.save_env_value", side_effect=mock_save), \
+         patch("hermes_cli.gateway.get_env_value", side_effect=mock_get), \
+         patch("hermes_cli.gateway.prompt_yes_no", side_effect=prompt_yes_no_responses), \
+         patch("hermes_cli.gateway.prompt_choice", side_effect=prompt_choice_responses), \
+         patch("hermes_cli.gateway.prompt", side_effect=prompt_responses), \
+         patch("hermes_cli.gateway.print_info"), \
+         patch("hermes_cli.gateway.print_success"), \
+         patch("hermes_cli.gateway.print_warning"), \
+         patch("hermes_cli.gateway.print_error"), \
+         patch("hermes_cli.gateway.color", side_effect=lambda t, c: t), \
+         patch("gateway.platforms.feishu.qr_register", return_value=qr_result):
+
+        from hermes_cli.gateway import _setup_feishu
+        _setup_feishu()
+
+    return saved_env
+
+
+# ---------------------------------------------------------------------------
+# QR scan-to-create path
+# ---------------------------------------------------------------------------
+
+class TestSetupFeishuQrPath:
+    """Tests for the QR scan-to-create happy path."""
+
+    def test_qr_success_saves_core_credentials(self):
+        env = _run_setup_feishu(
+            qr_result={
+                "app_id": "cli_test",
+                "app_secret": "secret_test",
+                "domain": "feishu",
+                "open_id": "ou_owner",
+                "bot_name": "TestBot",
+                "bot_open_id": "ou_bot",
+            },
+            prompt_yes_no_responses=[True],        # Start QR
+            prompt_choice_responses=[0, 0, 0],  # method=QR, dm=pairing, group=open
+            prompt_responses=[""],                  # home channel: skip
+        )
+        assert env["FEISHU_APP_ID"] == "cli_test"
+        assert env["FEISHU_APP_SECRET"] == "secret_test"
+        assert env["FEISHU_DOMAIN"] == "feishu"
+
+    def test_qr_success_does_not_persist_bot_identity(self):
+        """Bot identity is discovered at runtime by _hydrate_bot_identity — not persisted
+        in env, so it stays fresh if the user renames the bot later."""
+        env = _run_setup_feishu(
+            qr_result={
+                "app_id": "cli_test",
+                "app_secret": "secret_test",
+                "domain": "feishu",
+                "open_id": "ou_owner",
+                "bot_name": "TestBot",
+                "bot_open_id": "ou_bot",
+            },
+            prompt_yes_no_responses=[True],
+            prompt_choice_responses=[0, 0, 0],
+            prompt_responses=[""],
+        )
+        assert "FEISHU_BOT_OPEN_ID" not in env
+        assert "FEISHU_BOT_NAME" not in env
+
+
+# ---------------------------------------------------------------------------
+# Connection mode
+# ---------------------------------------------------------------------------
+
+class TestSetupFeishuConnectionMode:
+    """Connection mode: QR always websocket, manual path lets user choose."""
+
+    def test_qr_path_defaults_to_websocket(self):
+        env = _run_setup_feishu(
+            qr_result={
+                "app_id": "cli_test", "app_secret": "s", "domain": "feishu",
+                "open_id": None, "bot_name": None, "bot_open_id": None,
+            },
+            prompt_choice_responses=[0, 0, 0],  # method=QR, dm=pairing, group=open
+            prompt_responses=[""],
+        )
+        assert env["FEISHU_CONNECTION_MODE"] == "websocket"
+
+    @patch("gateway.platforms.feishu.probe_bot", return_value=None)
+    def test_manual_path_websocket(self, _mock_probe):
+        env = _run_setup_feishu(
+            qr_result=None,
+            prompt_choice_responses=[1, 0, 0, 0, 0],  # method=manual, domain=feishu, connection=ws, dm=pairing, group=open
+            prompt_responses=["cli_manual", "secret_manual", ""],  # app_id, app_secret, home_channel
+        )
+        assert env["FEISHU_CONNECTION_MODE"] == "websocket"
+
+    @patch("gateway.platforms.feishu.probe_bot", return_value=None)
+    def test_manual_path_webhook(self, _mock_probe):
+        env = _run_setup_feishu(
+            qr_result=None,
+            prompt_choice_responses=[1, 0, 1, 0, 0],  # method=manual, domain=feishu, connection=webhook, dm=pairing, group=open
+            prompt_responses=["cli_manual", "secret_manual", ""],  # app_id, app_secret, home_channel
+        )
+        assert env["FEISHU_CONNECTION_MODE"] == "webhook"
+
+
+# ---------------------------------------------------------------------------
+# DM security policy
+# ---------------------------------------------------------------------------
+
+class TestSetupFeishuDmPolicy:
+    """DM policy must use platform-scoped FEISHU_ALLOW_ALL_USERS, not the global flag."""
+
+    def _run_with_dm_choice(self, dm_choice_idx, prompt_responses=None):
+        return _run_setup_feishu(
+            qr_result={
+                "app_id": "cli_test", "app_secret": "s", "domain": "feishu",
+                "open_id": "ou_owner", "bot_name": None, "bot_open_id": None,
+            },
+            prompt_yes_no_responses=[True],
+            prompt_choice_responses=[0, dm_choice_idx, 0],  # method=QR, dm=<choice>, group=open
+            prompt_responses=prompt_responses or [""],
+        )
+
+    def test_pairing_sets_feishu_allow_all_false(self):
+        env = self._run_with_dm_choice(0)
+        assert env["FEISHU_ALLOW_ALL_USERS"] == "false"
+        assert env["FEISHU_ALLOWED_USERS"] == ""
+        assert "GATEWAY_ALLOW_ALL_USERS" not in env
+
+    def test_allow_all_sets_feishu_allow_all_true(self):
+        env = self._run_with_dm_choice(1)
+        assert env["FEISHU_ALLOW_ALL_USERS"] == "true"
+        assert env["FEISHU_ALLOWED_USERS"] == ""
+        assert "GATEWAY_ALLOW_ALL_USERS" not in env
+
+    def test_allowlist_sets_feishu_allow_all_false_with_list(self):
+        env = self._run_with_dm_choice(2, prompt_responses=["ou_user1,ou_user2", ""])
+        assert env["FEISHU_ALLOW_ALL_USERS"] == "false"
+        assert env["FEISHU_ALLOWED_USERS"] == "ou_user1,ou_user2"
+        assert "GATEWAY_ALLOW_ALL_USERS" not in env
+
+    def test_allowlist_prepopulates_with_scan_owner_open_id(self):
+        """When open_id is available from QR scan, it should be the default allowlist value."""
+        # We return the owner's open_id from prompt (+ empty home channel).
+        env = self._run_with_dm_choice(2, prompt_responses=["ou_owner", ""])
+        assert env["FEISHU_ALLOWED_USERS"] == "ou_owner"
+
+    def test_disabled_sets_feishu_allow_all_false(self):
+        env = self._run_with_dm_choice(3)
+        assert env["FEISHU_ALLOW_ALL_USERS"] == "false"
+        assert env["FEISHU_ALLOWED_USERS"] == ""
+        assert "GATEWAY_ALLOW_ALL_USERS" not in env
+
+
+# ---------------------------------------------------------------------------
+# Group policy
+# ---------------------------------------------------------------------------
+
+class TestSetupFeishuGroupPolicy:
+
+    def test_open_with_mention(self):
+        env = _run_setup_feishu(
+            qr_result={
+                "app_id": "cli_test", "app_secret": "s", "domain": "feishu",
+                "open_id": None, "bot_name": None, "bot_open_id": None,
+            },
+            prompt_yes_no_responses=[True],
+            prompt_choice_responses=[0, 0, 0],  # method=QR, dm=pairing, group=open
+            prompt_responses=[""],
+        )
+        assert env["FEISHU_GROUP_POLICY"] == "open"
+
+    def test_disabled(self):
+        env = _run_setup_feishu(
+            qr_result={
+                "app_id": "cli_test", "app_secret": "s", "domain": "feishu",
+                "open_id": None, "bot_name": None, "bot_open_id": None,
+            },
+            prompt_yes_no_responses=[True],
+            prompt_choice_responses=[0, 0, 1],  # method=QR, dm=pairing, group=disabled
+            prompt_responses=[""],
+        )
+        assert env["FEISHU_GROUP_POLICY"] == "disabled"
+
+
+# ---------------------------------------------------------------------------
+# Adapter integration: env vars → FeishuAdapterSettings
+# ---------------------------------------------------------------------------
+
+class TestSetupFeishuAdapterIntegration:
+    """Verify that env vars written by _setup_feishu() produce a valid adapter config.
+
+    This bridges the gap between 'setup wrote the right env vars' and
+    'the adapter will actually initialize correctly from those vars'.
+    """
+
+    def _make_env_from_setup(self, dm_idx=0, group_idx=0):
+        """Run _setup_feishu via QR path and return the env vars it would write."""
+        return _run_setup_feishu(
+            qr_result={
+                "app_id": "cli_test_app",
+                "app_secret": "test_secret_value",
+                "domain": "feishu",
+                "open_id": "ou_owner",
+                "bot_name": "IntegrationBot",
+                "bot_open_id": "ou_bot_integration",
+            },
+            prompt_yes_no_responses=[True],
+            prompt_choice_responses=[0, dm_idx, group_idx],  # method=QR, dm, group
+            prompt_responses=[""],
+        )
+
+    @patch.dict(os.environ, {}, clear=True)
+    def test_qr_env_produces_valid_adapter_settings(self):
+        """QR setup → adapter initializes with websocket mode."""
+        env = self._make_env_from_setup()
+
+        with patch.dict(os.environ, env, clear=True):
+            from gateway.config import PlatformConfig
+            from gateway.platforms.feishu import FeishuAdapter
+            adapter = FeishuAdapter(PlatformConfig())
+            assert adapter._app_id == "cli_test_app"
+            assert adapter._app_secret == "test_secret_value"
+            assert adapter._domain_name == "feishu"
+            assert adapter._connection_mode == "websocket"
+
+    @patch.dict(os.environ, {}, clear=True)
+    def test_open_dm_env_sets_correct_adapter_state(self):
+        """Setup with 'allow all DMs' → adapter sees allow-all flag."""
+        env = self._make_env_from_setup(dm_idx=1)
+
+        with patch.dict(os.environ, env, clear=True):
+            from gateway.platforms.feishu import FeishuAdapter
+            from gateway.config import PlatformConfig
+            # Verify adapter initializes without error and env var is correct.
+            FeishuAdapter(PlatformConfig())
+            assert os.getenv("FEISHU_ALLOW_ALL_USERS") == "true"
+
+    @patch.dict(os.environ, {}, clear=True)
+    def test_group_open_env_sets_adapter_group_policy(self):
+        """Setup with 'open groups' → adapter group_policy is 'open'."""
+        env = self._make_env_from_setup(group_idx=0)
+
+        with patch.dict(os.environ, env, clear=True):
+            from gateway.config import PlatformConfig
+            from gateway.platforms.feishu import FeishuAdapter
+            adapter = FeishuAdapter(PlatformConfig())
+            assert adapter._group_policy == "open"
diff --git a/website/docs/user-guide/messaging/feishu.md b/website/docs/user-guide/messaging/feishu.md
index ac4bad239..4d9783d40 100644
--- a/website/docs/user-guide/messaging/feishu.md
+++ b/website/docs/user-guide/messaging/feishu.md
@@ -31,12 +31,25 @@ Set it to `false` only if you explicitly want one shared conversation per chat.
 
 ## Step 1: Create a Feishu / Lark App
 
+### Recommended: Scan-to-Create (one command)
+
+```bash
+hermes gateway setup
+```
+
+Select **Feishu / Lark** and scan the QR code with your Feishu or Lark mobile app. Hermes will automatically create a bot application with the correct permissions and save the credentials.
+
+### Alternative: Manual Setup
+
+If scan-to-create is not available, the wizard falls back to manual input:
+
 1. Open the Feishu or Lark developer console:
    - Feishu: [https://open.feishu.cn/](https://open.feishu.cn/)
    - Lark: [https://open.larksuite.com/](https://open.larksuite.com/)
 2. Create a new app.
 3. In **Credentials & Basic Info**, copy the **App ID** and **App Secret**.
 4. Enable the **Bot** capability for the app.
+5. Run `hermes gateway setup`, select **Feishu / Lark**, and enter the credentials when prompted.
 
 :::warning
 Keep the App Secret private. Anyone with it can impersonate your app.