Create app.py

app.py

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+import streamlit as st
+import os
+from langchain.agents import initialize_agent, Tool
+from langchain.agents.agent_types import AgentType
+from langchain_community.llms.groq import ChatGroq
+from dotenv import load_dotenv
+
+# Load .env
+load_dotenv()
+
+# --- Groq API Key ---
+GROQ_API_KEY = os.getenv("GROQ_API_KEY") or st.secrets.get("GROQ_API_KEY", "")
+if not GROQ_API_KEY:
+    st.error("❌ Please set your GROQ_API_KEY in Hugging Face Secrets.")
+    st.stop()
+
+# --- LLM Setup ---
+llm = ChatGroq(api_key=GROQ_API_KEY, model_name="mixtral-8x7b-32768")
+
+# --- Define a goal breakdown function (not lambda) ---
+def goal_planner_tool(user_goal: str) -> str:
+    return f"4-Week Goal: {user_goal}\n\n" \
+           f"Week 1: Research and outline\n" \
+           f"Week 2: Start execution with small tasks\n" \
+           f"Week 3: Iterate, improve, and scale\n" \
+           f"Week 4: Final review, wrap-up, and reflect\n\n" \
+           f"Tip: Stay consistent and track your progress daily."
+
+# --- Tools ---
+tools = [
+    Tool(
+        name="GoalPlanner",
+        func=goal_planner_tool,
+        description="Breaks a 4-week goal into weekly action steps."
+    )
+]
+
+# --- Initialize Agent ---
+agent = initialize_agent(
+    tools,
+    llm,
+    agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION,
+    verbose=False
+)
+
+# --- Streamlit App UI ---
+st.set_page_config(page_title="Goal Planner Buddy", layout="centered")
+
+# --- Custom dark mode styling ---
+custom_css = """
+<style>
+    .stApp {
+        background-color: #121212;
+        color: white;
+    }
+    input, textarea {
+        background-color: #1e1e1e !important;
+        color: white !important;
+    }
+    .stButton > button {
+        background-color: #4CAF50;
+        color: white;
+    }
+</style>
+"""
+st.markdown(custom_css, unsafe_allow_html=True)
+
+# --- UI ---
+st.title("🎯 Goal Planner Buddy")
+st.subheader("Break your goals into weekly plans with AI")
+
+goal_input = st.text_input("Enter your 4-week goal:")
+if st.button("Generate Plan"):
+    if goal_input:
+        try:
+            prompt = f"Break down this 4-week goal into weekly tasks and motivation tips: {goal_input}"
+            response = agent.run(prompt)
+            st.success("✅ Plan Generated:")
+            st.markdown(f"```\n{response}\n```")
+        except Exception as e:
+            st.error(f"⚠️ Agent error: {e}")
+    else:
+        st.warning("Please enter a goal.")