agent-browser

agent-browser is a skill for Claude Code from melandlabs/openloomi. It costs 108 tokens per session (3,853 once invoked), scanned A, a copy of agent-browser, Apache-2.0.

A command-line browser controller for AI agents. It can navigate websites, fill forms, click controls, take screenshots, and extract information.

In plain words
What is it for?
Use it to automate website workflows, collect information from pages, and test web applications.
Why use it?
It removes the need to handle browser actions manually or write custom automation for each website.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to automate website workflows, collect information from pages, and test…

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Install with agentmods
npx agentmods add skills/melandlabs/openloomi/agent-browser
About the project

OpenLoomi is an open-source desktop AI coworker that connects work tools, gathers context, and highlights decisions or actions needing attention. It is for people managing work across multiple apps, and its catalogue add-ons extend the resident desktop for agent frameworks such as Claude Code, Codex, OpenCode, Hermes, and OpenClaw.

melandlabs/openloomi · 1,021 stars · on GitHub · openloomi.ai

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add melandlabs/openloomi --skill agent-browser
Clone the repo
git clone --depth 1 https://github.com/melandlabs/openloomi

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for agent-browser

README.md
[![agentmods](https://agentmods.dev/badge/skills/melandlabs/openloomi/agent-browser.svg)](https://agentmods.dev/skills/melandlabs/openloomi/agent-browser)
Your own site
<a href="https://agentmods.dev/skills/melandlabs/openloomi/agent-browser"><img src="https://agentmods.dev/badge/skills/melandlabs/openloomi/agent-browser.svg" alt="Measured on agentmods" height="20"></a>
Per session 108 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,853 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 72% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00108 $0.03853
Opus 5 $0.00054 $0.01927
Sonnet 5 $0.00022 $0.00771
Haiku 4.5 $0.00011 $0.00385

Measured 7d ago against content hash 6fa76ed124c9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

agent-browser scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (templates/authenticated-session.sh, templates/capture-workflow.sh, templates/form-automation.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

72% identical to agent-browser — 155 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/agent-browser/SKILL.md · 467 lines

How it starts

The opening of the file, as written. The whole thing — 467 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Browser Automation with agent-browser

Installation

Global Installation (recommended)

Installs the native Rust binary for maximum performance:

npm install -g agent-browser
agent-browser install  # Download Chromium

This is the fastest option -- commands run through the native Rust CLI directly with sub-millisecond parsing overhead.

Quick Start (no install)

Run directly with npx if you want to try it without installing globally:

npx agent-browser install   # Download Chromium (first time only)
npx agent-browser open example.com

Note: npx routes through Node.js before reaching the Rust CLI, so it is noticeably slower than a global install. For regular use, install globally.

Homebrew (macOS)

brew install agent-browser
agent-browser install  # Download Chromium

Linux Dependencies

On Linux, install system dependencies:

agent-browser install --with-deps
# or manually: npx playwright install-deps chromium

Core Workflow

Every browser automation follows this pattern:

  1. Navigate: agent-browser open <url>
  2. Snapshot: agent-browser snapshot -i (get element refs like @e1, @e2)
  3. Interact: Use refs to click, fill, select
  4. Re-snapshot: After navigation or DOM changes, get fresh refs
agent-browser open https://example.com/form
agent-browser snapshot -i
# Output: @e1 [input type="email"], @e2 [input type="password"], @e3 [button] "Submit"

agent-browser fill @e1 "[email protected]"
agent-browser fill @e2 "password123"
agent-browser click @e3
agent-browser wait --load networkidle
agent-browser snapshot -i  # Check result

Command Chaining

Commands can be chained with && in a single shell invocation. The browser persists between commands via a background daemon, so chaining is safe and more efficient than separate calls.

# Chain open + wait + snapshot in one call
agent-browser open https://example.com && agent-browser wait --load networkidle && agent-browser snapshot -i

# Chain multiple interactions
agent-browser fill @e1 "[email protected]" && agent-browser fill @e2 "password123" && agent-browser click @e3

# Navigate and capture
agent-browser open https://example.com && agent-browser wait --load networkidle && agent-browser screenshot page.png

Read the full file on GitHub · 467 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 467 lines · 108 tokens per session scan A 6fa76ed124c9

Subscribe to this mod's changes

agent-browser is a skill published in the GitHub repository melandlabs/openloomi (1,021 stars, last pushed 6d ago), licensed Apache-2.0. It adds 108 tokens to every session and 3,853 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. It is 72% identical to agent-browser, differing in 155 lines, and is treated as a copy.

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