agentmods.dev

vc-agent-browser

vc-agent-browser is a skill for Claude Code, Codex from withkynam/vibecode-pro-max-kit. It costs 37 tokens per session (2,346 once invoked), scanned A, original, MIT.

A command-line browser automation tool that uses compact page snapshots and references to interact with web pages.

In plain words
What is it for?
It is for opening pages, inspecting interactive elements, filling forms, clicking controls, recording sessions, and testing browsers through Browserbase.
Why use it?
It reduces the amount of page information an AI agent must process during long browser sessions and supports checking its own workflows.

Skill for Claude CodeCodex

not rated 1.1k +7 2mo ago A scan 37 tokens original MIT
View the source file withkynam/vibecode-pro-max-kit
About the project

vibecode-pro-max-kit is a set of instructions, agents, skills, hooks, and settings that gives AI coding agents a plan-first software development workflow. It is designed for developers, product owners, and other builders using agents such as Claude Code, Codex, Cursor, Windsurf, or Copilot across different technology stacks. The catalogue entries are the kit's own workflow components.

withkynam/vibecode-pro-max-kit · 1,115 stars · on GitHub

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/withkynam/vibecode-pro-max-kit/vc-agent-browser
Any agent
npx skills add withkynam/vibecode-pro-max-kit --skill vc-agent-browser
Clone the repo
git clone --depth 1 https://github.com/withkynam/vibecode-pro-max-kit

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 vc-agent-browser

README.md
[![agentmods](https://agentmods.dev/badge/skills/withkynam/vibecode-pro-max-kit/vc-agent-browser.svg)](https://agentmods.dev/skills/withkynam/vibecode-pro-max-kit/vc-agent-browser)
Your own site
<a href="https://agentmods.dev/skills/withkynam/vibecode-pro-max-kit/vc-agent-browser"><img src="https://agentmods.dev/badge/skills/withkynam/vibecode-pro-max-kit/vc-agent-browser.svg" alt="Measured on agentmods" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,346 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 $0.00037 $0.02346
Opus 5 $0.00018 $0.01173
Sonnet 5 $0.00007 $0.00469
Haiku 4.5 $0.00004 $0.00235

Measured 5d ago against content hash 1fc82b98945f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

vc-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 1 executable file (scripts/__tests__/error-handling.test.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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

.claude/skills/vc-agent-browser/SKILL.md · 306 lines

How it starts

The opening of the file, as written. The whole thing — 306 lines — stays where its author put it; the contents beside it link to each section on GitHub.

agent-browser Skill

Browser automation CLI designed for AI agents. Uses "snapshot + refs" paradigm for 93% less context than Playwright MCP.

Quick Start

# Install globally
npm install -g agent-browser

# Download Chromium (one-time)
agent-browser install

# Linux: include system deps
agent-browser install --with-deps

# Verify
agent-browser --version

Core Workflow

The 4-step pattern for all browser automation:

# 1. Navigate
agent-browser open https://example.com

# 2. Snapshot (get interactive elements with refs)
agent-browser snapshot -i
# Output: button "Sign In" @e1, textbox "Email" @e2, ...

# 3. Interact using refs
agent-browser fill @e2 "[email protected]"
agent-browser click @e1

# 4. Re-snapshot after page changes
agent-browser snapshot -i

Project-Specific Setup

For project-specific connection patterns, logged-in session reuse through chrome-debug, and when to use agent-browser vs chrome-devtools vs direct non-browser verification, see the project's browser-automation testing notes in the consuming repo, if present. This skill file stays a generic tool reference only and should not redefine the project's broader testing policy.

When to Use (vs chrome-devtools)

Use agent-browser Use chrome-devtools
Long autonomous AI sessions Quick one-off screenshots
Context-constrained workflows Custom Puppeteer scripts needed
Video recording for debugging WebSocket full frame debugging
Cloud browsers (Browserbase) Existing workflow integration
Multi-tab handling Need Sharp auto-compression
Self-verifying build loops Session with auth injection

Token efficiency: ~280 chars/snapshot vs 8K+ for Playwright MCP.

Command Reference

Navigation

agent-browser open <url>       # Navigate to URL
agent-browser back             # Go back
agent-browser forward          # Go forward
agent-browser reload           # Reload page
agent-browser close            # Close browser

Read the full file on GitHub · 306 lines

Files

What ships with it

60 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. 5d ago First seen · 306 lines · 37 tokens per session scan A 1fc82b98945f

Subscribe to this mod's changes

vc-agent-browser is a skill published in the GitHub repository withkynam/vibecode-pro-max-kit (1,115 stars, last pushed 2mo ago), licensed MIT. It adds 37 tokens to every session and 2,346 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 2026-08-30.

Browser automationagenticai-agentsai-coding-assistantai-developmentai-workflowanthropic
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