browser-use

browser-use is a skill for Claude Code, Codex from Kripu77/software-factory. It costs 40 tokens per session (387 once invoked), scanned A, original, MIT.

A procedure for testing a running web app by using a real browser, including clicking, typing, and taking screenshots.

In plain words
What is it for?
Use it to walk through one user journey, test forms and navigation, check errors and visible states, and report results with screenshots.
Why use it?
It checks what a user actually sees when automated tests do not cover a flow. It produces evidence of working and broken steps without changing product code.

Skill for Claude CodeCodex

Part of the software-factory plugin — 9 skills, 9 commands shipped together

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/kripu77/software-factory/browser-use
Any agent
npx skills add Kripu77/software-factory --skill browser-use
Clone the repo
git clone --depth 1 https://github.com/Kripu77/software-factory

Made for: Claude Code, Codex.

Or install software-factory, the plugin that ships this one along with the rest of its 9 skills, 9 commands.

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 browser-use

README.md
[![agentmods](https://agentmods.dev/badge/skills/kripu77/software-factory/browser-use.svg)](https://agentmods.dev/skills/kripu77/software-factory/browser-use)
Your own site
<a href="https://agentmods.dev/skills/kripu77/software-factory/browser-use"><img src="https://agentmods.dev/badge/skills/kripu77/software-factory/browser-use.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 387 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00040 $0.00387
Opus 5 $0.00020 $0.00193
Sonnet 5 $0.00008 $0.00077
Haiku 4.5 $0.00004 $0.00039

Measured 4d ago against content hash 0802900f8bca, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

browser-use 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 4d ago.

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/browser-use/SKILL.md · 46 lines

What it actually says

Browser use

Trigger

Need to test a running web app by actually using it. No smoke suite, or the suite does not cover this flow.

Navigate, click, fill, screenshot, assert. Use the harness browser.

How to drive the browser

Pick the door the runner actually has, in this order:

  1. A first-party browser tool on this harness (Grok Bot browserUse, Grok Build browser, Claude computer use).
  2. Headed Playwright against the given URL, if Playwright is already in the checkout.
  3. Stop and say the harness has no browser.

Do not invent a headless stack. Do not scrape cookies out of a profile to skip login.

Workflow

  1. Resolve the target URL (dispatched, or local app for the repo). Confirm it is up before clicking.
  2. Walk the flow as a user. One path. Screenshot each meaningful step.
  3. Assert what the user would see: copy, state, error, navigation.
  4. If login or 2FA is required, stop and hand that step to a human. Never ask for a password in chat. Never read .env.
  5. Report. Repro, screenshots, what broke, what was fine.

Guardrails

  • Report only. Do not patch product code.
  • Prefer a real click over injecting JS.
  • Deterministic waits for visible state, not sleep.
  • Stay on the dispatched flow. Do not wander the whole site.
  • Never merge.

Output

  • Flow walked
  • Screenshots of evidence
  • Failures with repro steps
  • Anything that could not be tested (auth wall, downed app)
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. 4d ago First seen · 46 lines · 40 tokens per session scan A 0802900f8bca

Subscribe to this mod's changes

browser-use is a skill published in the GitHub repository Kripu77/software-factory (7 stars, last pushed yesterday), licensed MIT. It adds 40 tokens to every session and 387 once invoked, about $0.0002 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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