Phase 2 build initial

hcfs-python/requirements-sdk.txt

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+# HCFS Python SDK Requirements
+
+# Core HTTP clients
+httpx>=0.25.0
+requests>=2.31.0
+
+# Data validation and modeling
+pydantic>=2.5.0
+pydantic-settings>=2.1.0
+
+# WebSocket support
+websockets>=12.0
+
+# Async utilities
+asyncio-mqtt>=0.13.0
+
+# Caching
+cachetools>=5.3.0
+
+# Type hints and utilities
+typing-extensions>=4.8.0
+
+# Optional monitoring dependencies
+prometheus-client>=0.19.0
+structlog>=23.2.0
+
+# Development dependencies (optional)
+pytest>=7.4.0
+pytest-asyncio>=0.21.0
+pytest-mock>=3.12.0
+black>=23.9.0
+isort>=5.12.0
+mypy>=1.6.0