Captures your web app's complete development timeline - server logs, browser events, console messages, network requests, and automatic screenshots - in a unified, timestamped feed for AI debugging.
vercel-labs/dev3000 is a local web debugging runtime that records a web app's server logs, browser events, errors, network activity, interactions, and screenshots in one timestamped timeline. Coding agents use it to run and inspect web applications while reproducing bugs. Its catalogue add-ons teach agents how to operate the runtime and examine its debugging evidence.
Latest release v0.0.189 · 29 Oct 2026
4 files for Claude Code, Codex and OpenCode: analyze-bundle, deepsec, dev3000 AGENTS.md, dev3000 CLAUDE.md — 1,391 tokens loaded in every session.
AGENTS.md A 1,388 tok CLAUDE.md A 3 tok .agents/skills/analyze-bundle/SKILL.md A 17 tok .agents/skills/deepsec/SKILL.md A 41 tok These files are vercel-labs/dev3000's own configuration — they tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.