Core
Core is an agent skill (a SKILL.md file) from vercel-labs/agent-browser. Core agent-browser usage guide. Read this before running any agent-browser commands. It works with Claude Code and Cursor and has 44,602 GitHub stars across a repository of 7 listed skills.
github.com/vercel-labs/agent-browser/skill-data/core (opens in a new tab)
Data as of from the GitHub API; description from the skill's SKILL.md. Report an error
- Official
- Multi-skill repo
- Plugin marketplace
- Data & analysis
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Add this skill
Claude
This repository is a Claude Code plugin marketplace. In Claude Code:
/plugin marketplace add vercel-labs/agent-browser
/plugin install agent-browser@agent-browserIn the Claude apps, zip the core folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).
ChatGPT / Codex
Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:
git clone --depth 1 https://github.com/vercel-labs/agent-browser.git
cp -r agent-browser/skill-data/core .agents/skills/core # repo; ~/.agents/skills for all projectsStandalone skills also load in the ChatGPT desktop app.
Cursor
Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:
git clone --depth 1 https://github.com/vercel-labs/agent-browser.git
cp -r agent-browser/skill-data/core .cursor/skills/core # project; ~/.cursor/skills for all projectsSource (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), code.claude.com/docs/en/plugin-marketplaces (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)
What this skill does
Core agent-browser usage guide. Read this before running any agent-browser commands. Covers the snapshot-and-ref workflow, navigating pages, interacting with elements (click, fill, type, select), extracting text and data, taking screenshots, managing tabs, handling forms and auth, waiting for content, running multiple browser sessions in parallel, and troubleshooting common failures.
When it triggers
- Use when the user asks to interact with a website, fill a form, click something, extract data, take a screenshot, log into a site, test a web app, or automate any browser task.
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How do I install the Core skill?
In Claude Code, run /plugin marketplace add vercel-labs/agent-browser and then /plugin install agent-browser@agent-browser. For Codex or Cursor, copy the core folder into .agents/skills/ or .cursor/skills/.
Is the Core skill free?
Yes. The repository is open source under the Apache-2.0 license.
Is Core maintained?
The repository's most recent commit was on Oct 26, 2026. Its latest release is v0.39.4. appsgit only lists skills from repositories with a commit in the last six months.