Fix Spaces crash: use pysqlite3 for ChromaDB and remove hardcoded port

app.py

@@ -33,6 +33,17 @@ from dotenv import load_dotenv
 # Load environment variables
 load_dotenv()
 
+# ============================================================
+# SQLite Fix for Hugging Face Spaces (ChromaDB requirement)
+# ============================================================
+if sys.platform.startswith("linux"):
+    try:
+        __import__("pysqlite3")
+        sys.modules["sqlite3"] = sys.modules.pop("pysqlite3")
+    except ImportError:
+        pass
+
+
 # ============================================================
 # Pipeline Logger — engineering_guardrails.md §5.1
 # ============================================================
@@ -1038,10 +1049,8 @@ if __name__ == "__main__":
         print("   Or export it: export OPENAI_API_KEY=your-key-here")
         print()
 
-    ui = build_ui()
+    # Launch with environment variables handling port/host
     ui.launch(
-        server_name="0.0.0.0",
-        server_port=7860,
         theme=gr.themes.Default(primary_hue="blue", secondary_hue="slate"),
         css=".main-header {text-align: center; margin-bottom: 2rem;} .upload-area {min-height: 150px;}"
     )

requirements.txt

@@ -6,4 +6,4 @@ pydantic>=2.0.0
 gradio>=5.0.0
 python-dotenv>=1.0.0
 requests>=2.31.0
-
+pysqlite3-binary  # Required for CrewAI/ChromaDB on Linux (HF Spaces)