Agentty

agentty is a coding agent for the terminal, written in C++26 and shipped as a single static binary of about 19 MB with no Node, Python or npm dependency. It positions itself as a drop in alternative to Anthropic's Claude Code client, with a cold start of a few milliseconds on Linux and an inline interface that sits at the bottom of the terminal, preserves scrollback and renders diffs, todos and exit codes as dedicated widgets. It is for developers who want a fast, self contained agent that works with the model access they already have. Users can sign in with an existing Claude Pro or Max, ChatGPT, GitHub Copilot or Kimi subscription, or supply keys for DeepSeek, Gemini, Grok, OpenAI, Groq, OpenRouter, Together, Cerebras, Fireworks or a local Ollama model. Shell and build commands run sandboxed by default through bwrap on Linux and the native sandbox on macOS, with SSH keys, system configuration and other projects kept read only. A single command runs the agent on an air gapped host by relaying traffic over SSH. Other capabilities include a Smart Mode that routes turns between flagship, mid tier and cheap models, isolated subagents, Agent Skills defined in a SKILL.md file, persistent memory, local retrieval over a document corpus, MCP as both client and server, and an Agent Client Protocol mode that runs it as an agent panel inside the Zed editor. agentty is free and open source under the MIT license. There is no paid tier; the only cost is whatever model subscription or API usage the user connects.