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agent-browser · vercel-labs | DecimalAI

agent toolingby vercel-labs

agent-browser

Source vercel-labs/agent-browser ↗License Apache-2.0

Browser automation CLI for AI agents.

SkillScore91Maintained

Automatic

QA & Test Engineering pack

Last verified 8/30/2026

What it changes

Passed 18 of 20 test cases with the skill, and 8 of 20 without it.

Without skill41%

With skill91%

Checks it passed that the model alone missed

The response identifies the CLI as a native Rust application.
The response specifies running agent-browser skills get slack.
The response specifies running agent-browser skills get electron.

and 8 more in the full report

11 fixed9 passed either way2 still failing0 broke

Pass-rate lift: +50 pp
Tokens: -41%
Agent turns: 0%
Response time: -40%

Model gemini-3.6-flashMeasured 8/30/2026v320 of 22 cases passed with skill · 20 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/agent-browser/SKILL.md https://app.decimal.ai/s/agent-browser-fb2ab5/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add agent-browser-fb2ab5, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/agent-browser/ and pins it in .decimal/skills.lock

decimalai skills add agent-browser-fb2ab5

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/agent-browser/SKILL.md https://app.decimal.ai/s/agent-browser-fb2ab5/SKILL.md

Raw file: /s/agent-browser-fb2ab5/SKILL.md ↗ · machine-readable summary at /s/agent-browser-fb2ab5.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

We plan to execute web automation workflows inside Vercel Sandbox microVM instances using our browser CLI tool. What exact command loads the specialized guide for Vercel Sandbox deployment?

What was checked, without and with the skill
Checked	Without skill	With skill
The response specifies running agent-browser skills get vercel-sandbox.	Missed	Passed

case-08 · gemini-3.6-flash · 8/30/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md45 linessingle file

agent-browser

Fast browser automation CLI for AI agents. Chrome/Chromium via CDP with accessibility-tree snapshots and compact @eN element refs.

Install: npm i -g agent-browser && agent-browser install

Start here

This file is a discovery stub, not the usage guide. Before running any agent-browser command, load the actual workflow content from the CLI:

agent-browser skills get core             # start here — workflows, common patterns, troubleshooting
agent-browser skills get core --full      # include full command reference and templates

The CLI serves skill content that always matches the installed version, so instructions never go stale. The content in this stub cannot change between releases, which is why it just points at skills get core.

Specialized skills

Load a specialized skill when the task falls outside browser web pages:

agent-browser skills get electron          # Electron desktop apps (VS Code, Slack, Discord, Figma, ...)
agent-browser skills get slack             # Slack workspace automation
agent-browser skills get dogfood           # Exploratory testing / QA / bug hunts
agent-browser skills get derive-client     # Record a HAR, derive a standalone API client for a site
agent-browser skills get vercel-sandbox    # agent-browser inside Vercel Sandbox microVMs
agent-browser skills get protected-vercel-deployments  # Access protected Vercel deployments
agent-browser skills get agentcore         # AWS Bedrock AgentCore cloud browsers

Run agent-browser skills list to see everything available on the installed version.

Why agent-browser

Fast native Rust CLI, not a Node.js wrapper
Works with any AI agent (Cursor, Claude Code, Codex, Continue, Windsurf, etc.)
Chrome/Chromium via CDP with no Playwright or Puppeteer dependency
Accessibility-tree snapshots with element refs for reliable interaction
Sessions, authentication vault, state persistence, video recording

Track record

Benchmark

18 / 20

test cases passed, vs 8 / 20 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v5 — 8/30/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

vercel-labs / agent-browser

skills/agent-browser/SKILL.md

View on GitHub ↗

License Apache-2.0Imported 8/30/2026Version v3

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Ready to supercharge your AI agents?

See it in action

What's inside

agent-browser

Start here

Specialized skills

Why agent-browser

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills