agentty

A blazing-fast, open-source coding agent in your terminal.
A drop-in Claude Code alternative in C++26 — one static binary, millisecond startup, any model.

Why agentty?

Most terminal coding agents ship as a Node or Python app and send big chunks of your repository to the model on every turn. agentty takes the opposite approach:

• It's one native binary. 16.7 MB, ~3 ms cold start, zero runtime dependencies — no Node, no Python, no npm install, no node_modules. Download and run.
• It sends only the relevant code. Built-in retrieval (hybrid BM25 + dense embeddings, code-aware chunking, GraphRAG) fetches just the slices that matter — often cutting context by 80%+ vs. whole-repo dumping.
• It's not locked to one vendor. Sign in with your Claude Pro/Max, or point it at OpenAI, Groq, OpenRouter, Cerebras, DeepSeek, xAI (Grok), Mistral,