Text Editor

ad – modal text editor inspired by Plan 9 Acme

ad is an experimental text editor that combines modal editing with ideas from the Plan 9 Acme and sam editors. Its central concept is that text inside an editing environment can be operated on by external programs as well as modified directly. The emphasis is on integrating small tools rather than building every possible development function into the editor itself.

Its navigation and selection model takes inspiration from Vim and Kakoune. More complex text transformations draw on sam-style commands, while an exposed editor interface makes it possible for external programs to interact with buffers and other editor state.

The developer explicitly describes ad as a playground for exploring text-editor design and warns that it is not recommended as a primary editor. Documentation is limited, behaviour may change, and bugs or crashes remain possible. It is most appropriate for users interested in the design of extensible text-editing environments.

This is free and open source software.

Key Features

  • Modal editing with keyboard motions and selection operations.
  • Structural regular-expression commands inspired by sam.
  • Plan 9 Acme-inspired interface for external tools and scripts.
  • Editor state exposed to external clients through a virtual filesystem interface.
  • Minibuffer-based user-defined minor modes.
  • Mouse-based navigation and text selection alongside keyboard editing.
  • Tree-sitter highlighting with alternative regular-expression highlighting.
  • Experimental Language Server Protocol client and editor integration.

Website: github.com/sminez/ad
Support:
Developer: Innes Anderson-Morrison
License: MIT License

ad at startup

ad is written in Rust. Learn Rust with our recommended free books and free tutorials.


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