Axum 0.8 Expert Skill

Overview

This skill provides expert guidance for developing with Axum 0.8.x, the ergonomic and modular web framework built with Tokio, Tower, and Hyper. Axum 0.8 was released in January 2025 and includes several breaking changes from 0.7.

Critical Breaking Changes from 0.7 to 0.8

1. Path Parameter Syntax Change (BREAKING - Affects Nearly All Users)

Old Syntax (0.7):

Router::new()
    .route("/users/:id", get(handler))
    .route("/files/*path", get(catch_all))