🪾 Asimi CLI

A safe, opinionated coding agent

Asimi is an opinionated command-line interface that brings AI-powered coding assistance directly to your terminal. Built with modern Go libraries and a focus on developer experience, Asimi helps you write better code faster.

✨ Features

📦 Integrated Podman Sandboxes - Agent's shell run in its own container

• 🎨 vi mimicry - Asimi is based on the fittest dev tool and its reincarnations vim an neovim
• 🤖 Multiple AI Providers - Support for Ollama and Claude foe now. More are comming [TODO: Add a link to issues with a label of "new providers"]
• Less Clutter - Asimi's special files are under .agents directory and TOML is used for .conf
• 🔧 Fast Shell** - Asimi's persistent, containerized shell is >100 times faster than the others
• 📊 Context Awareness** - Smart token counting and context visualization
• 🎯 Session Management** - Save and resume your coding sessions

We're still missing MCP support. If it's critical for you, please consider helping out #

🚀 Quick Start

Please choose your installer flavor:

Go

go install github.com/affitestide/asimi-cli

Binaries

TODO: Release 0.2.0

Download the binary from your platform from latest releases and copy to your favorite bin directory e.g, /usr/local/bin.

One liner

TODO: add a one line installer probably at https://asimi.dev/installer

First Steps

After To start Asimi in interactive mode type asimi.

1. Add the infrastructure to your project :init To add:

2. Login to your AI provider: :login

3. Initialize your repo: :init - Creates a AGENTS.md and Justfile if missing and .agents/Sandbox for the container

4. Check your container:* :!uname -a - runs shell commands is a persistent, containrized bash :!pwd - should be the same path as on your host

⌨️ vi FTW

Asimi mimics the vi/vim/neovim interface:

Modes

• Insert Mode Type normally
• Normal Mode Navigation and editing only
• Command Mode Entering agents commands
  • :help - Show help
  • :context - View token usage and context
  • :new - Start a new conversation
  • :resume - resume an old session

Quick Reference

Entering Insert Mode:

• i - Insert at cursor
• I - Insert at line start
• a - Append after cursor
• A - Append at line end
• o - Open line below
• O - Open line above

Entering Command Mode:

• ':' - In normal mode or as first character is Visual

Navigation (Normal Mode):

• h/j/k/l - Left/Down/Up/Right
• w/b - Word forward/backward
• 0/$ - Line start/end
• gg/G - Input start/end

Editing (Normal Mode):

• x - Delete character
• dw - Delete word
• D - Delete to line end
• p - Paste

🛠️ Development

Prerequisites

• Go 1.25 or higher
• Just command runner

Common Tasks

We're using a Justfile to collect all our script. If you need a new script please add a recipe in the Justfile.

# List recipes
just

# run Asimi
just run

# Run tests
just test

# measure shell's  performance
just measure

Project Structure

Flat. Please refrain from adding directories and files.

📦 Libraries

• LangChainGo - LLM communications and tools
• Bubble Tea - Terminal UI framework
• Koanf - Configuration management
• Kong - CLI argument parser
• Glamour - Markdown rendering

🔒 Security

Asimi takes security seriously:

• API keys are stored securely in your system keyring
• No data is sent to third parties except your chosen AI provider
• Shell commands are executed in a containerized sandbox

🤝 Contributing

We welcome contributions! Here are some ways you can help:

1. Report bugs - Open an issue with details
2. Suggest features - Share your ideas
3. Submit PRs - Fix bugs or add features

Commit Message Style

We use present progressive tense for commit messages:

# Good
git commit -m "feat: adding markdown support"
git commit -m "bug: fixing context overflow bug"

# Avoid
git commit -m "added markdown support"
git commit -m "fixed context overflow bug"

📝 Configuration

Asimi stores its configuration in ~/.config/asimi/asimi.toml (user-level) or .agents/asimi.toml (project-level):

[llm]
provider = "anthropic"
model = "claude-sonnet-4-20250514"
vi_mode = true  # Enable vi-style keybindings (default: true)
max_output_tokens = 4096

[ui]
# Toggle Glamour-based markdown rendering (default: false). Set to true for full markdown.
markdown_enabled = false

[run_in_shell]
# Commands regex to run on the host instead of the container
run_on_host = ['^gh ']

Configuration Options

• vi_mode - Enable/disable vi-style keybindings (default: true)
  • Set to false to use standard editing mode
  • Can also be set via environment variable: ASIMI_LLM_VI_MODE=false
• provider - AI provider (anthropic, openai, googleai, qwen)
• model - Model name (provider-specific)
• max_output_tokens - Maximum tokens in AI responses
• max_turns - Maximum conversation turns before stopping
• ui.markdown_enabled - Enable Glamour markdown rendering when true (default: false); when false, Asimi uses lightweight word wrapping for faster UI resizing. Override via ASIMI_UI_MARKDOWN_ENABLED=true|false.

Environment Variables

• EDITOR - Preferred text editor for export commands
• ASIMI_LAZYGIT_CMD - Custom lazygit command path
• ANTHROPIC_OAUTH_TOKEN - OAuth token for Anthropic API (takes priority over keyring). Supports three formats:
  • Raw access token: sk-ant-...
  • JSON format: {"access_token":"...", "refresh_token":"...", "expiry":"...", "provider":"anthropic"}
  • Base64-encoded JSON (useful if copying from keychain)
• ANTHROPIC_API_KEY - API key for Anthropic (alternative to OAuth)
• ANTHROPIC_BASE_URL - Custom base URL for Anthropic API (e.g., for proxy or custom endpoint)

Logs are rotated and stored in ~/.local/share/asimi/. When running with --debug, logs are instead written to asimi.log in the project root for quick inspection.

🐛 Troubleshooting

Common Issues

Q: Asimi won't start

# Check if the binary is executable
chmod +x asimi

# Try running with verbose logging
./asimi --debug

Q: API key not working

Re-login to refresh credentials

use :login

Q: Context overflow errors

# Check your context usage
:context

# Start a new conversation
/new

📊 Roadmap

See issues for planned issues

Upcoming Features

• MCP Support
• Task delegation with sub-agents
• [ ]

📄 License

[Add your license here]

🙏 Acknowledgments

• Built with ❤️ using Go
• Inspired by vi and his great grandchildren - the coding agents
• Special thanks to the Bubble Tea and LangChainGo communities

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Made with 🪾 by the Asimi team

Safe, fun, and high-quality code generation

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