open-browser

open-browser is a skill for Claude Code, Codex from timurgaleev/vibestack. It costs 51 tokens per session (2,674 once invoked), scanned A, original, MIT.

A skill for opening a visible Chromium web browser controlled by an AI assistant. Chromium is the open-source browser that powers browsers such as Google Chrome; the window shows the actions being taken and includes a sidebar.

In plain words
What is it for?
Use it to launch a browser, connect to Chrome, open a side panel, or control a real browser window.
Why use it?
It lets you watch browser automation as it happens and provides built-in handling intended to reduce detection by websites that block automated traffic.

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

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 open-browser

README.md
[![agentmods](https://agentmods.dev/badge/skills/timurgaleev/vibestack/open-browser.svg)](https://agentmods.dev/skills/timurgaleev/vibestack/open-browser)
Your own site
<a href="https://agentmods.dev/skills/timurgaleev/vibestack/open-browser"><img src="https://agentmods.dev/badge/skills/timurgaleev/vibestack/open-browser.svg" alt="Measured on agentmods" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,674 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 $0.00051 $0.02674
Opus 5 $0.00026 $0.01337
Sonnet 5 $0.00010 $0.00535
Haiku 4.5 $0.00005 $0.00267

Measured yesterday against content hash 0d29e40baec5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

open-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 yesterday.

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/open-browser/SKILL.md · 255 lines

How it starts

The opening of the file, as written. The whole thing — 255 lines — stays where its author put it; the contents beside it link to each section on GitHub.

When to invoke

Use when asked to "open browser", "launch browser", "connect chrome", "open chrome", "real browser", "launch chrome", "side panel", or "control my browser".

Preamble

eval "$(~/.vibestack/bin/vibe-slug 2>/dev/null)" 2>/dev/null || SLUG="unknown"
_LEARN_FILE="${VIBESTACK_HOME:-$HOME/.vibestack}/projects/${SLUG:-unknown}/learnings.jsonl"
if [ -f "$_LEARN_FILE" ]; then
  _LEARN_COUNT=$(wc -l < "$_LEARN_FILE" 2>/dev/null | tr -d ' ')
  echo "LEARNINGS: $_LEARN_COUNT entries loaded"
  if [ "$_LEARN_COUNT" -gt 5 ] 2>/dev/null; then
    ~/.vibestack/bin/vibe-learnings-search --limit 5 2>/dev/null || true
  fi
else
  echo "LEARNINGS: none yet"
fi

{{include lib/snippets/session-host.md}}

{{include lib/snippets/decision-brief.md}}

{{include lib/snippets/working-protocols.md}}

{{include lib/snippets/state-protocols.md}}

/open-browser — Launch vibestack Browser

Launch vibestack Browser — AI-controlled Chromium with the sidebar extension, anti-bot stealth, and real-time visibility. You see every action as it happens.

SETUP (run this check BEFORE any browse command)

_ROOT=$(git rev-parse --show-toplevel 2>/dev/null)
B=""
# install renders each skill to <root>/skills/<name>/ and links its bin/ — there
# is no skills/vibestack/ directory and no dist/browse, so the previous paths
# could never resolve and this skill always dead-ended at NEEDS_SETUP.
[ -n "$_ROOT" ] && [ -x "$_ROOT/.claude/skills/browse/bin/vibe-browse" ] && B="$_ROOT/.claude/skills/browse/bin/vibe-browse"
[ -z "$B" ] && [ -x "${CLAUDE_SKILL_DIR:-$HOME/.claude/skills/open-browser}/../browse/bin/vibe-browse" ] && B="${CLAUDE_SKILL_DIR:-$HOME/.claude/skills/open-browser}/../browse/bin/vibe-browse"
[ -z "$B" ] && B="$(command -v vibe-browse || true)"
if [ -x "$B" ]; then echo "READY: $B"; else echo "NEEDS_SETUP"; fi

If NEEDS_SETUP, stop and tell the user: "The browse daemon is required for this skill but is not installed. vibestack does not bundle the browse daemon — it's a separate dependency. See docs/external-tools.md for current options."

Read the full file on GitHub · 255 lines

Files

What ships with it

1 file 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. yesterday Changed · +7 lines 0d29e40baec5
  2. 5d ago First seen · 248 lines · 51 tokens per session scan A 510a2cae9e46

Subscribe to this mod's changes

open-browser is a skill published in the GitHub repository timurgaleev/vibestack (6 stars, last pushed 2d ago), licensed MIT. It adds 51 tokens to every session and 2,674 once invoked, about $0.0003 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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