Actix-web Rust web framework. Covers routing, extractors, middleware,
state management, and WebSocket. Use for high-performance Rust APIs.
USE WHEN: user mentions "actix-web", "actix", "rust web framework", "rust api",
asks about "rust async web", "actix middleware", "actix extractors",
"rust websocket", "high performance rust api"
DO NOT USE FOR: Axum projects - use `axum` instead, Rocket projects - use `rocket` instead,
Warp projects - use `warp` instead, non-Rust backends