Browser Automation

Browser Automation is a skill for Claude Code, Codex from notforyou23/home23. It costs 20 tokens per session (371 once invoked), scanned A, original, MIT.

Instructions for using a live web browser to open pages, capture screenshots, and extract rendered text.

In plain words
What is it for?
Use it to verify page loading, inspect rendered content, take screenshots, and extract text from selected parts of a website.
Why use it?
It checks what users actually see when a page depends on JavaScript or other browser behavior that a basic web request may miss.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to verify page loading, inspect rendered content, take screenshots, and extract text from selected parts of a website.

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Install with agentmods
npx agentmods add skills/notforyou23/home23/browser-automation
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 notforyou23/home23 --skill browser-automation
Clone the repo
git clone --depth 1 https://github.com/notforyou23/home23

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 Browser Automation

README.md
[![agentmods](https://agentmods.dev/badge/skills/notforyou23/home23/browser-automation/github.svg)](https://agentmods.dev/skills/notforyou23/home23/browser-automation)
Your own site
<a href="https://agentmods.dev/skills/notforyou23/home23/browser-automation"><img src="https://agentmods.dev/badge/skills/notforyou23/home23/browser-automation/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Browser Automation

Your own site · 80×15
<a href="https://agentmods.dev/skills/notforyou23/home23/browser-automation"><img src="https://agentmods.dev/badge/skills/notforyou23/home23/browser-automation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 371 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00020 $0.00371
Opus 5 $0.00010 $0.00186
Sonnet 5 $0.00004 $0.00074
Haiku 4.5 $0.00002 $0.00037

Measured 9d ago against content hash 13a8481a78a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

Browser Automation 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 9d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (index.js), 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.

workspace/skills/browser-automation/SKILL.md · 77 lines

What it actually says

Browser Automation

Use this skill when a live browser pass is a better fit than plain HTTP fetches.

When to use

Use browser-automation for:

  • page screenshots
  • extracting rendered text
  • checking that a page loads correctly in the live browser

Actions

navigate

Input:

{
  "url": "https://example.com",
  "waitMs": 3000
}

extract

Input:

{
  "url": "https://example.com",
  "selector": "main",
  "waitMs": 3000
}

screenshot

Input:

{
  "url": "https://example.com",
  "waitMs": 3000
}

Gotchas

  • This skill requires the Home23 browser controller to be available.
  • Heavy client-side pages may need a longer waitMs.
  • Use this when rendering matters. If plain HTTP text is enough, web_browse may be cheaper.
Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 77 lines · 20 tokens per session scan A 13a8481a78a9

Subscribe to this mod's changes

Browser Automation is a skill published in the GitHub repository notforyou23/home23 (11 stars, last pushed today), licensed MIT. It adds 20 tokens to every session and 371 once invoked, about $0.0001 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 2026-08-30.