What is jcode?

jcode is a command line tool that lets you work with AI coding agents like Claude to write and edit code. It is built to support running many sessions at once, to be easy to customize, and to be fast and light on system resources compared to similar tools. The README puts a heavy focus on performance numbers. It compares jcode against other coding agent tools, including Codex CLI, OpenCode, GitHub Copilot CLI, Cursor Agent, Claude Code, and a few others, measuring how much memory each one uses with one session open and with ten sessions open at the same time. Across these tests, jcode reports using noticeably less memory than every tool it compares against, with the gap growing larger as more sessions are opened at once. The README also times how quickly each tool shows its first screen and responds to typed input after starting up, and again reports jcode finishing fastest by a wide margin in these specific benchmarks. Installation is done through a single command line script for macOS and Linux, or a PowerShell command for Windows 11, both of which download and set up the tool automatically. The project also documents other installation methods, including Homebrew and building from source, along with instructions for setting up different AI providers to power the agent. The project is written in Rust and is released under the MIT license. It has an active Discord community linked from the README, along with a dedicated website and a contributing guide for people who want to help build the project. The full README continues past what is shown here with sections on further installation details, a quick start guide, and additional documentation links. The full README is longer than what was shown.