agent-browser

agent-browser is a skill for Claude Code from kivo360/OmoiOS. It costs 70 tokens per session (1,720 once invoked), scanned A, original, Apache-2.0.

A command-line tool that controls a headless browser, which is a browser running without its normal visible window.

In plain words
What is it for?
Use it to open pages, inspect interactive elements, click buttons, fill forms, scrape content, take screenshots, test login flows, and automate browser tasks.
Why use it?
It gives coding agents a repeatable way to interact with websites and select page elements using references instead of guessing from raw page text.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

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/kivo360/omoios/agent-browser
Any agent
npx skills add kivo360/OmoiOS --skill agent-browser
Clone the repo
git clone --depth 1 https://github.com/kivo360/OmoiOS

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 agent-browser

README.md
[![agentmods](https://agentmods.dev/badge/skills/kivo360/omoios/agent-browser.svg)](https://agentmods.dev/skills/kivo360/omoios/agent-browser)
Your own site
<a href="https://agentmods.dev/skills/kivo360/omoios/agent-browser"><img src="https://agentmods.dev/badge/skills/kivo360/omoios/agent-browser.svg" alt="Measured on agentmods" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,720 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 5.1 $0.00070 $0.01720
Opus 5 $0.00035 $0.00860
Sonnet 5 $0.00014 $0.00344
Haiku 4.5 $0.00007 $0.00172

Measured 6d ago against content hash 02fba5979738, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

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 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/agent-browser/SKILL.md · 241 lines

How it starts

The opening of the file, as written. The whole thing — 241 lines — stays where its author put it; the contents beside it link to each section on GitHub.

agent-browser

CLI browser automation optimized for AI. Use refs from snapshots for reliable element selection. 93% less context than Playwright MCP, 95% first-try success rate.

Core Workflow

agent-browser open <url>           # Navigate
agent-browser snapshot -i          # Get interactive elements with refs
agent-browser click @e2            # Click by ref
agent-browser fill @e3 "text"      # Fill by ref
agent-browser snapshot -i          # Re-snapshot after changes
agent-browser close                # Close browser

Snapshot (Most Important)

Get accessibility tree with element refs for deterministic selection:

agent-browser snapshot              # Full tree
agent-browser snapshot -i           # Interactive only (buttons, inputs, links)
agent-browser snapshot -c           # Compact (no empty elements)
agent-browser snapshot -d 3         # Limit depth
agent-browser snapshot -i -c --json # Combine for AI parsing

Output example:

- heading "Example Domain" [ref=e1]
- button "Submit" [ref=e2]
- textbox "Email" [ref=e3]

Use refs with @ prefix: agent-browser click @e2

Essential Commands

Navigation

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

Interaction

agent-browser click @ref            # Click element
agent-browser fill @ref "text"      # Clear and fill input
agent-browser type @ref "text"      # Type into element
agent-browser press Enter           # Press key
agent-browser select @ref "value"   # Select dropdown option
agent-browser check @ref            # Check checkbox
agent-browser hover @ref            # Hover element
agent-browser scroll down 500       # Scroll (up/down/left/right)

Get Info

agent-browser get text @ref         # Get text content
agent-browser get value @ref        # Get input value
agent-browser get title             # Page title
agent-browser get url               # Current URL

Read the full file on GitHub · 241 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 · 241 lines · 70 tokens per session scan A 02fba5979738

Subscribe to this mod's changes

agent-browser is a skill published in the GitHub repository kivo360/OmoiOS (76 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 70 tokens to every session and 1,720 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 2026-08-30.

Related

Other skills, from other repositories

hive.browser-automation

Required before any hive-browser CLI command. The browser is driven from the terminal by running hive-browser ... --json via terminalexec — not via MCP tools. Teaches the browser lifecycle rules (the bridge attaches to the USER'S running Chrome — never kill or launch browser processes; timeouts are transport issues…

aden-hive/hive · 142 tokens

hive.linkedin-automation

Read before automating LinkedIn with browser tools. LinkedIn combines shadow DOM (#interop-outlet), strict Trusted Types CSP that silently drops innerHTML, Lexical composer, native beforeunload dialogs that hang the bridge, and aggressive spam filters — each has bitten us at least once. Verified flows for profile…

aden-hive/hive · 99 tokens

hive.x-automation

Read before automating X / Twitter with browser tools. Verified flows for post, reply, delete, search-and-engage, plus the Draft.js compose quirks that silently disable the send button. Includes the daily-reply and job-market-reply playbooks. Requires hive.browser-automation for the underlying screenshot + coordinate…

aden-hive/hive · 81 tokens

hive.slack-notifications-setup

Set up a Slack notification channel (Sentinel) for a colony by driving the browser — reuse or create the "Hive Sentinel" Slack app from a JSON manifest, install it, capture the bot + app tokens, create/select the channel via the Slack API, and turn Sentinel on so the colony can ping the user on Slack and accept…

aden-hive/hive · 136 tokens

browser-edge-cases

SOP for debugging browser automation failures on complex websites. Use when browser tools fail on specific sites like LinkedIn, Twitter/X, SPAs, or sites with Shadow DOM.

aden-hive/hive · 40 tokens

playwriter

Browser automation via Playwriter (remorses) using persistent Chrome sessions and the full Playwright Page API.

mikeyobrien/ralph-orchestrator · 25 tokens