Show HN: OpenCode server and TUI in a browser tab (Chrome desktop)

Category: devtools

Tags: wasm, code-agent, browser-runtime, opencode, sandbox, dev-server

Score: 8.3/10 (Innovation: 9, Technical: 9, Documentation: 8, Utility: 7)

Browser Agent Toolkit runs the OpenCode coding agent server, a POSIX-like shell, and a dev server entirely inside a Chrome tab using a custom Rust/WASM kernel and shared memory, eliminating server-side sandbox costs. It enables in-browser code editing for web apps with live hot-reload, leveraging the real OpenCode agent rather than a reimplementation. The project is experimental but demonstrates a novel architecture combining a WASM kernel, immutable dependency images, and cross-origin isolation for secure agent execution.

Target audience: frontend and full-stack developers, devtools builders, and agent platform engineers

Repository: https://kkrausse.github.io/browser-agent-toolkit/ · TypeScript · NOASSERTION

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