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backend/requirements.txt

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+# FastAPI & server
+fastapi==0.109.0
+uvicorn[standard]==0.27.0
+
+# Database
+sqlalchemy==2.0.25
+aiosqlite==0.19.0
+greenlet
+
+# Validation & config
+pydantic==2.5.3
+pydantic-settings==2.1.0
+
+# LLM providers
+openai==1.12.0
+anthropic==0.18.1
+httpx==0.26.0
+
+# Analysis
+networkx==3.2.1
+
+# Export
+openpyxl==3.1.2
+weasyprint==60.2
+jinja2==3.1.3
+
+# Utils
+python-multipart==0.0.6
+python-dateutil==2.8.2