reference dependencies

Dependencies

Declared in pyproject.toml under [project.dependencies].

Package	Minimum version	Purpose
`fastapi`	0.115.0	Web framework for the REST API
`httpx`	0.28.0	Async HTTP client for engine API calls
`lxml`	5.3.0	XML and HTML parsing for scrape-based engines
`pyyaml`	6.0	YAML output formatting for agent-native responses
`uvicorn[standard]`	0.34.0	ASGI server for FastAPI
`valkey`	6.0.0	Valkey client for caching and rate limiting

Declared in pyproject.toml under [project.optional-dependencies].

Package	Minimum version	Purpose
`pytest`	8.0	Test framework
`pytest-asyncio`	0.24.0	Async test support for pytest
`ruff`	0.9.0	Python linter and formatter
`cssselect`	1.2	CSS selector support for lxml (used in tests)
`mypy`	1.13	Static type checker
`pytest-cov`	6.0	Code coverage plugin for pytest
`pip-tools`	7.4	Dependency pinning and lock file management