diff --git a/src/lib/llm/prompt/facebook/__init__.py b/src/lib/llm/prompt/facebook/__init__.py
new file mode 100644
index 0000000..7a7672b
--- /dev/null
+++ b/src/lib/llm/prompt/facebook/__init__.py
@@ -0,0 +1,2 @@
+from lib.llm.prompt.facebook.prompt import prompt
+from lib.llm.prompt.facebook.model import model
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diff --git a/src/lib/llm/prompt/facebook/model.py b/src/lib/llm/prompt/facebook/model.py
new file mode 100644
index 0000000..ef01814
--- /dev/null
+++ b/src/lib/llm/prompt/facebook/model.py
@@ -0,0 +1,6 @@
+from pydantic import BaseModel
+
+class model(BaseModel):
+    msg: str | None = None
+    status: str | None = None  # "success", "mfa_required", "facebook_blocked", "sso_not_found", "login_page_not_found", "invalid_credentials"
+    final_url: str | None = None
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diff --git a/src/lib/llm/prompt/facebook/prompt.py b/src/lib/llm/prompt/facebook/prompt.py
new file mode 100644
index 0000000..518dd4f
--- /dev/null
+++ b/src/lib/llm/prompt/facebook/prompt.py
@@ -0,0 +1,50 @@
+import os
+# Extended planner prompt
+prompt = f"""
+You are a web automation agent.
+Your task is to visit the given domain and perform a full login via the **Facebook SSO button**, following all steps strictly as described below.
+▶ Target: Find a login page inside this domain that allows "Sign in with Facebook", and use it to complete login via Facebook.
+Instructions:
+1. If any cookie or privacy popups appear, dismiss or accept them.
+2. Navigate through the site's UI to find the **login or sign-in page** (e.g., via buttons like "Log In", "Sign In", "Get Started").
+   - Only follow links within the same domain.
+3. On the login page, look for a clearly labeled **Facebook SSO button** — typically labeled as:
+   - "Continue with Facebook"
+   - "Sign in with Facebook"
+   - "Login with Facebook"
+   - or a button with the Facebook 'f' icon
+4. Click the **Facebook login button**.
+   - ⚠️ The Facebook login flow MUST open in a **new browser tab** (not a new window or popup).
+   - ❌ If the login opens in a new **window** or **popup**, do NOT continue. Immediately stop and return the appropriate status.
+5. Check if the user is **already logged in to Facebook and immediately redirected back to the original site** without showing a Facebook login screen.
+   - ✅ If so, treat the login as successful and return immediately.
+6. If redirected to the Facebook login page:
+   - If a **CAPTCHA**, **MFA prompt**, or a request for **ID/password entry** appears, do NOT proceed.
+   - Immediately stop and return the appropriate status.
+7. If login proceeds without interruptions, wait for redirection back to the original site and record the final URL.
+Credentials to use for Facebook login:
+- Email: {os.getenv("FACEBOOK_EMAIL", "")}
+- Password: {os.getenv("FACEBOOK_PASSWORD", "")}
+Constraints:
+- Do NOT use search engines or guess URLs.
+- Do NOT use autofill, saved sessions, or cookies.
+- Do NOT proceed with login if:
+   - The login opens in a new window (only tabs are allowed)
+   - CAPTCHA or MFA appears
+   - ID/password input is required
+- If the user is already logged in to Facebook and redirected back automatically, stop there and report success.
+- If the login page cannot be found, return "login_page_not_found".
+- If the Facebook login button is not found, return "sso_not_found".
+- If a page such as a sign-up page appears, consider it a successful login and terminate immediately.
+Final Output:
+Return the result in the following format only:
+```json
+{{
+   "msg": "Facebook login completed",
+   "status": "success" | "already_logged_in" | "mfa_required" | "captcha_triggered" | "window_blocked" | "idpw_required" | "facebook_blocked" | "sso_not_found" | "login_page_not_found",
+   "final_url": "<url_after_login_redirect or empty string>"
+}}
+```
+
+- Return ONLY the JSON object. Do NOT include any explanation, logging, or extra output.
+"""
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