agent-browser

agent-browser is a skill for Claude Code, Codex from archibate/agent-skills. It costs 82 tokens per session (5,487 once invoked), scanned A, original, no licence file.

A guide for inspecting and testing web pages in a browser that runs without a visible window. It covers actions such as filling forms, clicking controls, taking screenshots, and reviewing the appearance and usability of web interfaces.

In plain words
What is it for?
Use it to automate browser tests, debug web apps, capture screenshots, and inspect frontend UI and UX.
Why use it?
It helps check how a web page behaves without manually using a browser, making it easier to reproduce problems and verify frontend changes.

Skill for Claude CodeCodex

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.

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

Made for: Claude Code, Codex.

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/archibate/agent-skills/agent-browser.svg)](https://agentmods.dev/skills/archibate/agent-skills/agent-browser)
Your own site
<a href="https://agentmods.dev/skills/archibate/agent-skills/agent-browser"><img src="https://agentmods.dev/badge/skills/archibate/agent-skills/agent-browser.svg" alt="Measured on agentmods" height="20"></a>
Per session 82 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,487 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found 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 $0.00082 $0.05487
Opus 5 $0.00041 $0.02743
Sonnet 5 $0.00016 $0.01097
Haiku 4.5 $0.00008 $0.00549

Measured 5d ago against content hash eb3b86dfa944, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 5d 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.

skills/agent-browser/SKILL.md · 651 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 5d ago First seen · 651 lines · 82 tokens per session scan A eb3b86dfa944

Subscribe to this mod's changes

agent-browser is a skill published in the GitHub repository archibate/agent-skills (6 stars, last pushed today), with no licence file. It adds 82 tokens to every session and 5,487 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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