kibi
A configurable terminal text editor written in Rust with UTF-8 support, syntax highlighting, and a strict 1024-line code limit.
What is kibi?
Kibi is a terminal-based text editor written in Rust with a strict limit of 1024 lines of code. It provides essential features like UTF-8 support, syntax highlighting, and incremental search while maintaining a minimal codebase. The project serves as both a practical lightweight editor and an educational example of constraint-driven software development.
Developers and students interested in minimalist software, Rust programming, or understanding text editor internals. It's suitable for users who need a fast, configurable terminal editor without heavy dependencies.
Kibi offers a unique combination of modern editor features (UTF-8, syntax highlighting) within an extremely small, auditable codebase. Its Rust foundation ensures memory safety, and the 1024-line constraint encourages clean, efficient code—making it both educational and practical.
Overview
A text editor in ≤1024 lines of code, written in Rust
Use Cases
Best For
- Learning text editor implementation in Rust
- Lightweight terminal editing on resource-constrained systems
- Educational projects demonstrating minimal software design
- Quick file edits in a terminal without launching a full IDE
- Customizing syntax highlighting for niche languages
- Exploring constraint-driven development (1024-line limit)
Not Ideal For
- Developers requiring advanced IDE features like integrated debugging, language server protocol (LSP) support, or a plugin ecosystem
- Projects involving editing of very large files where performance optimizations for memory and speed are critical
- Teams needing real-time collaborative editing or deep version control integration within the editor interface
- Users who prefer graphical interfaces, mouse-driven editing, or extensive accessibility features like screen reader support
Pros & Cons
Pros
Runs on Linux, macOS, Windows 10, WASI, and Android via Termux, as evidenced by the platform badges and installation instructions for multiple systems.
Leverages Rust's guarantees for secure, crash-resistant operation, ensuring safety without manual memory management, as highlighted in the comparison with kilo.
Supports over 38 languages through INI-based configuration files, allowing customization for niche languages via user-editable syntax definitions.
Constrained to 1024 lines of code (excluding tests), making it educational and easy to review while still providing features like UTF-8 support and incremental search.
Cons
The 1024-line limit inherently restricts advanced editor features such as regex search, multi-cursor editing, undo/redo beyond basic levels, or plugin support, which are common in full-featured editors.
Syntax highlighting files must be manually placed in specific directories (e.g., ~/.local/share/kibi/syntax.d), a process described in the installation section that can be error-prone and less user-friendly than automatic setups.
Lacks a graphical user interface, mouse support, or built-in accessibility features, which may limit usability for those accustomed to modern editors or with specific accessibility needs.
Frequently Asked Questions
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