Create main.py

main.py

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+import streamlit as st
+from openai import OpenAI
+
+# 1. Configuration
+st.set_page_config(page_title="High School Writing Coach", layout="wide")
+
+# Initialize client (ensure you have your API key in .streamlit/secrets.toml)
+# or set it directly for testing: client = OpenAI(api_key="sk-...")
+if "OPENAI_API_KEY" in st.secrets:
+    client = OpenAI(api_key=st.secrets["OPENAI_API_KEY"])
+else:
+    st.error("Please set your OpenAI API Key in .streamlit/secrets.toml")
+    st.stop()
+
+# 2. The "Secret Sauce" - The System Prompt
+# This enforces the "No Rewrite" rule.
+SYSTEM_PROMPT = """
+You are an expert high school English teacher and writing coach. 
+Your goal is to help students improve their writing skills, NOT to do the work for them.
+
+RULES:
+1. DO NOT rewrite the student's text. 
+2. If you see a grammatical error, quote the sentence and explain the grammar rule they broke.
+3. If you see weak argumentation, ask a Socratic question to prompt deeper thinking.
+4. Structure your feedback in Markdown with clear headings: "General Feedback", "Strengths", and "Areas for Improvement".
+5. Be encouraging but rigorous. Treat them like smart young adults.
+"""
+
+# 3. The UI Layout
+st.title("🎓 Digital Writing Coach")
+st.markdown("Paste your draft below. I will critique it and offer advice, but I won't rewrite it for you!")
+
+# Two columns: Input and Settings
+col1, col2 = st.columns([2, 1])
+
+with col1:
+    user_text = st.text_area("Your Essay/Draft", height=400, placeholder="Paste your writing here...")
+
+with col2:
+    st.header("Feedback Settings")
+    focus_area = st.selectbox(
+        "What should I focus on?",
+        ["General Critique", "Grammar & Punctuation", "Argument & Logic", "Clarity & Flow"]
+    )
+    grade_level = st.select_slider("Grade Level", options=["9th", "10th", "11th", "12th"])
+    
+    analyze_btn = st.button("Analyze My Writing", type="primary", use_container_width=True)
+
+# 4. The Logic
+if analyze_btn and user_text:
+    with st.spinner("Analyzing your rhetorical strategies..."):
+        try:
+            # Construct the specific user prompt
+            user_prompt = f"Grade Level: {grade_level}\nFocus Area: {focus_area}\n\nStudent Text:\n{user_text}"
+            
+            response = client.chat.completions.create(
+                model="gpt-4o", # High-spec model is crucial for nuance
+                messages=[
+                    {"role": "system", "content": SYSTEM_PROMPT},
+                    {"role": "user", "content": user_prompt}
+                ],
+                temperature=0.7 # Slight creativity for "teacher" persona, but grounded
+            )
+            
+            feedback = response.choices[0].message.content
+            
+            # 5. Display Feedback
+            st.markdown("---")
+            st.subheader("📝 Coach's Feedback")
+            st.markdown(feedback)
+            
+        except Exception as e:
+            st.error(f"An error occurred: {e}")