autonomous-ai-agency: Skill for Claude Code

.claude/skills/dev-browser/SKILL.md

dev-browser is a skill for Claude Code from strikersam/autonomous-ai-agency. It costs 75 tokens per session (1,492 once invoked), scanned A, original, MIT.

A command-line browser automation tool that runs JavaScript against a local or remote Chromium browser using Playwright, a browser-control library.

In plain words
What is it for?
UI testing, web scraping, visiting pages, reading page data, and automating browser tasks.
Why use it?
It lets scripts reuse named browser sessions and perform browser work without manually repeating actions.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths; positional $N argument.

This is strikersam/autonomous-ai-agency's own configuration. It tells Claude Code how to work on autonomous-ai-agency itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything autonomous-ai-agency configures →

Reuse

Borrowing it

Nothing to install: this file belongs to strikersam/autonomous-ai-agency. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/strikersam/autonomous-ai-agency/master/.claude/skills/dev-browser/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/strikersam/autonomous-ai-agency

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 dev-browser

README.md
[![agentmods](https://agentmods.dev/badge/skills/strikersam/autonomous-ai-agency/dev-browser/github.svg)](https://agentmods.dev/skills/strikersam/autonomous-ai-agency/dev-browser)
Your own site
<a href="https://agentmods.dev/skills/strikersam/autonomous-ai-agency/dev-browser"><img src="https://agentmods.dev/badge/skills/strikersam/autonomous-ai-agency/dev-browser/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 dev-browser

Your own site · 80×15
<a href="https://agentmods.dev/skills/strikersam/autonomous-ai-agency/dev-browser"><img src="https://agentmods.dev/badge/skills/strikersam/autonomous-ai-agency/dev-browser.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 75 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,492 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 warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Rogue Agent · line 96
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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 $0.00075 $0.01492
Opus 5 $0.00037 $0.00746
Sonnet 5 $0.00015 $0.00298
Haiku 4.5 $0.00007 $0.00149

Measured 6d ago against content hash a9b7027b6c48, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

dev-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 6d 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.

.claude/skills/dev-browser/SKILL.md · 207 lines

How it starts

The opening of the file, as written. The whole thing — 207 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill: dev-browser — Browser Automation via Sandboxed JS

Installation

npm install -g dev-browser
dev-browser install          # Downloads Playwright + Chromium

Add to .claude/settings.json to pre-approve all commands:

{"permissions": {"allow": ["Bash(dev-browser *)"]}}

Primary invocation styles

# Inline heredoc (most common)
dev-browser <<'EOF'
  const page = await browser.getPage("main");
  await page.goto("https://example.com");
  console.log(await page.title());
EOF

# Run a .js file
dev-browser run script.js

# Named browser instance (persists across runs)
dev-browser --browser my-project < script.js

# Connect to existing Chrome (local debugging port)
dev-browser --connect http://localhost:9222 <<'EOF'
  const page = await browser.getPage("main");
  await page.goto("https://example.com");
EOF

# Auto-discover Chrome with remote debugging enabled
dev-browser --connect <<'EOF'
  const page = await browser.getPage("main");
  console.log(await page.title());
EOF

CLI flags

Flag Default Description
--browser NAME "default" Named daemon-managed browser instance
--connect [URL] Connect to running Chrome (no URL = auto-discover)
--headless Launch without visible window
--ignore-https-errors Ignore self-signed TLS certificate errors
--timeout SECONDS 30 Max script execution time

Subcommands

dev-browser run FILE      # Run a JS file
dev-browser install       # Install Playwright browsers (Chromium)
dev-browser browsers      # List all managed browser instances
dev-browser status        # Show daemon status
dev-browser stop          # Stop daemon and all browsers

Sandbox environment

Scripts run in QuickJS WASM, NOT Node.js. These are NOT available:

  • require() / import() — no module loading
  • process — no process access
  • fs / path / os — no direct filesystem access
  • fetch / WebSocket — no direct network access
  • __dirname / __filename — no path globals

Read the full file on GitHub · 207 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. 6d ago First seen · 207 lines · 75 tokens per session scan A a9b7027b6c48

Subscribe to this mod's changes

dev-browser is a skill published in the GitHub repository strikersam/autonomous-ai-agency (8 stars, last pushed today), licensed MIT. It adds 75 tokens to every session and 1,492 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 2026-09-03.