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app.py

@@ -19,8 +19,15 @@ from google.adk.agents import Agent, SequentialAgent, ParallelAgent
 from google.adk.runners import InMemoryRunner
 from google.adk.tools import AgentTool, google_search
 
-# Get API key from environment (for Hugging Face Spaces) or use default
-GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY", "AIzaSyBR3sPTYuwKGkBBkAKvV13vBrqxBAfWL6Q")
+# Get API key from environment (required for Hugging Face Spaces)
+GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")
+
+if not GOOGLE_API_KEY:
+    raise ValueError(
+        "GOOGLE_API_KEY environment variable is required.\n"
+        "For Hugging Face Spaces: Add it as a secret in Space settings.\n"
+        "For local development: Set it with 'export GOOGLE_API_KEY=your-key'"
+    )
 
 # Set up environment
 os.environ["GOOGLE_API_KEY"] = GOOGLE_API_KEY
@@ -579,16 +586,24 @@ with gr.Blocks(
                 1. **Tech, Health, Finance Researchers** work in parallel
                 2. Each searches for trends in their domain (simultaneously!)
                 3. **Aggregator Agent** combines findings into executive summary
+
+                **Enter exactly three comma-separated topics** to build a custom briefing.
             """)
 
-            briefing_type = gr.Dropdown(
-                choices=[
+            briefing_type = gr.Textbox(
+                label="Briefing Topics (3 comma-separated domains)",
+                value="Technology, Health, and Finance",
+                placeholder="e.g., AI Safety, Robotics, Supply Chain Automation",
+            )
+
+            gr.Examples(
+                examples=[
                     "Technology, Health, and Finance",
                     "AI, Sustainability, and Education",
                     "Cybersecurity, Cloud Computing, and DevOps",
                 ],
-                value="Technology, Health, and Finance",
-                label="Briefing Topics",
+                inputs=briefing_type,
+                label="Suggested combinations",
             )
 
             parallel_btn = gr.Button("📈 Generate Executive Briefing", variant="primary")
@@ -606,7 +621,7 @@ with gr.Blocks(
 
             def parallel_with_status(topics):
                 if not topics or not topics.strip():
-                    return "Please select briefing topics.", "❌ No topics selected"
+                    return "Please enter briefing topics.", "❌ No topics provided"
                 return parallel_chat(topics), "✅ Executive briefing complete!"
 
             parallel_btn.click(