Browser Control

A set of instructions for inspecting and using open browser windows through the application's browser controls.

In plain words
What is it for?
Use it to open pages, inspect their content, click links and buttons, enter text, submit forms, scroll, reload, or evaluate page code.
Why use it?
It provides a consistent way to read pages, find controls, and interact with websites while waiting for navigation to finish.

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/binary16labs/prime-silo/browser-control
Any agent
npx skills add binary16labs/prime-silo --skill browser-control
Clone the repo
git clone --depth 1 https://github.com/binary16labs/prime-silo

Made for: Claude Code, Codex.

Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,496 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00016 $0.01496
Opus 5 $0.00008 $0.00748
Sonnet 5 $0.00003 $0.00299
Haiku 4.5 $0.00002 $0.00150

Measured 2d ago against content hash 56185d557105, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Browser Control 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 2d 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.

Origin

This is a copy

100% identical to Browser Control — 36 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

app/L0/_all/mod/_core/skillset/ext/skills/browser-control/SKILL.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Use this skill once at least one browser surface is open. browser-manager handles stand-alone window open or close work.

transient

  • currently open web browsers lists browser id|url|title
  • last interacted web browser may include fresh page content↓ with typed ref markers such as [link 12], [button 18], [image 24], or [input text 30]

workflow

  • pick the target from transient or an explicit numeric browser id such as 1
  • space.browser helpers already settle navigation state internally; do not call a separate sync step
  • open, navigate, history, reload, state(...), content(...), detail(...), and dom(...) settle internally and return fresh read results without a separate sync step, and evaluate(...) still resolves a ready guest without requiring a separate sync step first
  • ref-targeted action helpers such as click, type, submit, typeSubmit, and scroll return { action, state }; inspect result.action.status before retrying
  • open(...) and typed navigate(...) treat bare hosts like novinky.cz or localhost:3000 as browser-address input instead of app-relative paths
  • widget or page-authored <x-browser src="google.com"></x-browser> surfaces appear in the same browser list as stand-alone windows
  • inspection helpers such as content(...), detail(...), dom(...), and state(...) also settle internally and mark that browser as the current prompt-time page-content source
  • prefer the fresh last interacted web browser transient block after open, navigate, history, reload, and ref-targeted actions before asking for another explicit content(...) capture
  • use content(...) to get readable page content with stable typed refs for the latest capture; unlike dom(...), it should stay cleaned up for agent use and should not include raw helper wrapper markup from nested frames or shadow roots
  • dom(...) and content(...) accept either { selector: "..." } or { selectors: ["...", "..."] } when you want a scoped read instead of the whole page
  • content(...) is lean by default to save tokens: it uses typed ref boxes like [link 12] Story, [disabled muted button 18] Continue, [checked checkbox 7] Email updates, or [input text 30] Search placeholder=Hledat value=Ethereum, omits link destinations, omits quotes around labels, and omits list bullets while keeping list indentation
  • those refs also cover generic controls wired through framework or inline handlers such as @click, x-on:click, v-on:click, or onclick
  • state and semantic tags are best-effort hints, not absolute truth; use detail(id, ref) when actionability is unclear
  • if you need flatter output, content(id, { includeStateTags: false, includeSemanticTags: false }) suppresses those extra bracket tags
  • images also get refs now, so detail(id, ref) works for image targets too
  • if a specific link or image target matters, prefer detail(id, ref) on that reference instead of asking content(...) to print every -> url
  • use detail(...) for deeper DOM on one ref before acting, and use it to inspect a link's real href, an image source, another referenced DOM target, or richer state metadata when the destination or actionability matters
  • use click, type, submit, typeSubmit, and scroll only with refs from the latest content(...) capture
  • typeSubmit(...) types into the field and then presses Enter in that same field
  • any new content(...) call or navigation replaces the old ref ids
  • prefer high-level helpers first; use evaluate(id, script) or send(id, "evaluate", { script }) only as a last resort when refs or navigation helpers cannot express the step, and remember that the last evaluated expression or resolved promise value becomes the result
  • if result.action.status.noObservedEffect === true, stop retrying the same action and re-read the page or inspect the relevant control with detail(...)
  • treat validationTextAdded, nearbyTextChanged, descriptorChanged, valueChanged, checkedChanged, selectedChanged, and semanticHints as evidence about what the page did after your action
  • use numeric ids like 1, not browser-1

Read the full file on GitHub · 113 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. 2d ago First seen · 113 lines · 16 tokens per session scan A 56185d557105

Subscribe to this mod's changes

Browser Control is a skill published in the GitHub repository binary16labs/prime-silo (5 stars, last pushed 9d ago), licensed MIT. It adds 16 tokens to every session and 1,496 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to Browser Control, differing in 36 lines, and is treated as a copy.

Related

Other skills, from other repositories

dingtalk_channel_connect

Use a headed browser to automatically complete DingTalk channel integration for QwenPaw. Applicable when the user mentions DingTalk, developer console, Client ID, Client Secret, bot, Stream mode, binding or configuring a channel. Supports pausing when a login page is detected and resuming after the user logs in.

agentscope-ai/QwenPaw · 69 tokens

browser_cdp

Use this skill when the user explicitly wants to connect to a running Chrome browser, scan local CDP ports, specify a cdpport, or share a single browser across multiple agents/tools. By default browser opens no debugging port; pass an explicit cdpport only when the user wants another local tool to attach.

agentscope-ai/QwenPaw · 70 tokens

browser_cdp

当用户明确希望连接到已运行的 Chrome 浏览器、扫描本地 CDP 端口、显式指定 cdpport,或让多个 agent / 工具共享同一个浏览器时,使用本 skill。browser 默认不开放调试端口;仅当用户明确希望其他本地工具附加时才显式传入 cdpport。.

agentscope-ai/QwenPaw · 85 tokens

browser_visible

当用户需要控制 browser 的浏览器启动方式时,使用本 skill。browser 默认由 Playwright 直接管理、不开放调试端口(需让其他本地工具附加时显式传 cdpport);headed 控制是否显示窗口,privatemode 保留用于兼容、不再改变默认行为,browserargs 传入额外的 Chromium 启动参数,executablepath 指定自定义浏览器可执行文件路径。.

agentscope-ai/QwenPaw · 108 tokens

browser_visible

Use this skill when the user needs to control the browser launch mode for browser. By default browser is managed by Playwright and opens no debugging port (pass an explicit cdpport to let another local tool attach); headed controls whether the window is visible, and privatemode is kept for backward compatibility and…

agentscope-ai/QwenPaw · 75 tokens

browser

Drive a live browser with async Python against QwenPaw's builtin Browser SDK. The full reference is below; re-load this browser skill after context compaction.

agentscope-ai/QwenPaw · 35 tokens