Ultra-lightweight read-only IDE 'px0' for AI Agents Released: 20MB Memory, <1ms Startup Time

px0 v0.1.2 is a read-only IDE for the AI agent era, provided as a single static Go binary. This tool serves as a console that allows agents to instantly verify code written in the browser, offering symbol-level navigation, LSP-based intelligent search, and deep search capabilities. It requires no configuration files or runtimes (such as Node or Electron), has a startup time of less than 1ms, and an idle memory usage of approximately 20MB. Fuzzy search across 95,710 files in the Linux kernel takes 6ms.

Compared to traditional IDEs, px0 reduces memory usage by 70 times, from approximately 1,440MB to 20MB, and drops CPU spikes from 35-50% to less than 1%. The process structure consists of a single Go binary instead of more than 15 Node.js/Electron processes. Workspace indexing takes 13ms for Redis and 370ms for the Linux kernel.

Key features include fuzzy file search, symbol search, regex search, Git status display and diff view, Markdown preview, and LSP integration (go to definition, find references, etc.). There are no write endpoints; the HTTP API only performs reading, searching, and language server calls. It does not include an extension host, plugin marketplace, or Electron.

LSP integration supports 8 language servers, including gopls, rust-analyzer, typescript-language-server, pyright, clangd, zls, lua-language-server, and solargraph. HTML, CSS, and JS are embedded in the binary via go:embed, and it can be installed via a curl installation script. The original text mentions highlighting using the Chroma library and GFM Markdown rendering based on Goldmark, but specific data on the number of supported languages or performance for a specific file size (400,000 lines) is not specified.