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ALE is an asynchronous linting and fixing engine for Vim and Neovim that keeps feedback flowing without blocking your editor. It runs external linters and formatters in the background as you type or save, streaming diagnostics into the sign column and statusline. The project focuses on breadth and practicality: dozens of languages work out of the box, and configuration is usually a matter of selecting tools you already use on the command line. ALE can also act as a lightweight Language Server Protocol client, providing go-to-definition, hover, and code actions through LSP servers when available. Its fix-on-save pipelines and formatter integration help enforce team style guides reliably and repeatably. For large codebases and slower linters, ALE’s job queueing and smart debouncing prevent UI hiccups while still surfacing timely results.
Features
- Nonblocking linting with background jobs and live diagnostics
- Built-in support for many languages, linters, and formatters
- Optional LSP client capabilities for definitions, hovers, and code actions
- Fix-on-save and commandable format pipelines
- Sign column, virtual text, and quickfix integration for triage
- Per-project configuration and tool discovery for predictable setups
Project Samples
