Show HN: r3, A local alternative to Claude Artifacts

Category: devtools

Tags: ai-agents, artifact-review, local-first, html-preview, developer-tools, typescript

Score: 6.3/10 (Innovation: 6, Technical: 6, Documentation: 7, Utility: 6)

r3 is a local tool that lets you view AI-generated artifacts (HTML pages, Markdown documents, and code diffs) from any coding agent in a browser, leave precise comments on elements or passages, and send feedback back to the agent. It stands out by offering a self-hosted, single-user alternative to Claude Artifacts with a CLI/HTTP API for agent integration and remote access options.

Target audience: developers using AI coding agents, backend and frontend devs, AI engineers

Repository: https://github.com/hyperlogue/r3 · TypeScript · MIT · 45 stars

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