Agentty is an open-source, high-performance native terminal-based AI coding agent written in C++ by 1ay1. Engineered specifically for speed and minimal resource consumption, Agentty combines an autonomous coding engine with a purpose-built terminal user interface subsystem. Operating directly in the terminal, Agentty handles interactive developer sessions, code modification, repository exploration, and tool calling. The application integrates dedicated C++ submodules including mcp-cpp for Model Context Protocol integrations, acp-cpp for agent communications, rag-cpp for codebase retrieval, and maya for low-latency terminal rendering. Day-to-day interactions involve continuous streaming code outputs, local file execution, and web research capabilities with built-in SSRF protections. Agentty differentiates itself primarily through its extreme focus on execution and rendering efficiency. Rather than relying on heavy runtimes like Node.js or Python, it runs as an optimized native binary featuring sub-millisecond per-frame TUI rendering, Myers bit-parallel grid diffing, hash-keyed measure caches, and bounded rendering overhead even across hundreds of turns and thousands of output lines. Agentty is open-source software available on GitHub under standard open-source workflows. It functions as a compiled native CLI tool with zero runtime language dependency overhead.
Tags: cli, code assistant, coding agent, developer tools, terminal