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Butterfish is an open-source command-line interface (CLI) tool that integrates AI-powered assistance directly into your shell environment, such as bash or zsh, primarily on MacOS and Linux. Developed by bakks, it leverages OpenAI's GPT models to provide contextual command suggestions, explanations for command failures, and goal-oriented automation within the terminal. By intercepting shell input and output, Butterfish allows users to start prompts with a capital letter to query the AI, which has access to the shell history for enhanced context. It serves as a productivity enhancer for developers, system administrators, and power users who rely heavily on the command line, offering features like autosuggestions, customizable prompts, and an agent mode that can execute commands to achieve specified goals. Butterfish fits workflows that demand seamless AI integration without leaving the terminal, reducing the need for copy-pasting between tools and improving command accuracy and troubleshooting.
4.3/5
Context-aware and practical
Minimalist CLI with intuitive AI interaction
To provide AI-powered command-line assistance and automation within the shell environment.
Compatible with bash and zsh shells on MacOS and Linux, integrates via CLI and supports OpenAI-compatible APIs.
Free and open source under the MIT license
Features with the highest value for users are highlighted here.
AI-powered shell command prompting
Context-aware command autocompletion
Conversational interaction with shell history
Goal mode for autonomous command execution
Customizable and transparent AI prompts
Support for multiple OpenAI models
Compatibility with bash and zsh
OpenAI-compatible API integration
Install via Homebrew on MacOS or Go install on Linux/MacOS.
Provide your OpenAI API key to enable AI-powered features.
Run 'butterfish shell' to launch a new shell instance with AI integration.
Type commands starting with a capital letter to prompt the AI or use goal mode with '!' commands.
Developers
System Administrators
DevOps Engineers
Linux and MacOS Power Users
Open Source Enthusiasts
Technical Support Specialists
Data Scientists
Beginners Learning CLI
Neovim Users
Automation Enthusiasts
Free
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Side-by-side with top alternatives in this category.
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Website traffic and keyword analysis.
Monthly visits
1.15K
↓ -14.0% vs prior month
Avg. visit duration
00:00:00
M 4 2026 snapshot
Pages / visit
1.05
M 4 2026 snapshot
Bounce rate
53.61%
Lower is better
All traffic · Worldwide
Weekly estimate · Feb 1, 2026 – Apr 29, 2026
Peak week: 267.8 (Mar 1, 2026)Low week: 228 (Feb 1, 2026)WoW: 0.0%Derived from monthly estimates · SimilarWeb-equivalent
0 releases published
No releases yet.
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