Fetched Browser Interaction Agent Skill

Automates web browsing and JavaScript execution within Claude Code environments using CDP-compatible automation frameworks.

Context cost
15.3k tokensestimated from the bundle, loaded when it triggers
Bundle
16 files · 61.5 kB1 script among them — read before you run
Licence
GPL-3.0the author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Automates web browsing and JavaScript execution within Claude Code environments using CDP-compatible automation frameworks.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

automationbrowserjavascript

The skill itself

A skill is instructions the model reads, and here they are in full: the front matter loads with every session, and the body below it loads when the skill triggers. The other files in the bundle are listed further down.

SKILL.md0.5 kB
1# SKILL PROFILE: repo_civ_fetched_browser
2# Department Registry: Nova Research
3# Scope: Standardized Ecosystem Tools
4---
5
6## 1. Domain Capability
7- Javascript execution
8- Support of Web APIs (partial, WIP)
9- Compatible with Playwright^1], Puppeteer, chromedp through [CDP
10
11## 2. Linked Toolkit
12- File System Navigation
13- Shell Execution Proxy
14- Semantic Search Querying
15---
16*Capability Register dynamically hardened by OAP Core Toolchain Extractor.*
17
This is the whole of SKILL.md. Install the skill to get it and everything beside it.
In the file
SKILL.md63 words
Files16
LicenceGPL-3.0
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈20
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
15,330
on trigger
The instruction body and 15 supporting files, read only when the skill fires.
7.7%
of a 200k window
Ten skills this size would take about 77% of the window before you open a file.
050k100k150k200k context window

15.3k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md, shown in full above.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

16 files, 61.5 kB on disk. Mostly text — the instructions the model reads — with 1 script in it that your client would run only if the instructions tell it to. 7 files of its source are not in the download — listed after these, with why.

  • SKILL.md0.5 kB
  • DEEP_KNOWLEDGE.md4.2 kB
  • LICENSE34.5 kB
  • README.md12.5 kB
  • _DIR_IDENTITY.md0.7 kB
  • agent.md0.3 kB
  • cla.md6.1 kB
  • config.json0.1 kB
  • contributing.md0.4 kB
  • index.html0.3 kB
  • licensing.md0.2 kB
  • schema.json0.5 kB
  • script.js0.1 kB
  • security.md0.4 kB
  • style.css0.1 kB
  • upgrade_proposal.md0.6 kB

Not in the download

Not carried is a type a skill download does not hold. Take them from its source.

  • .gitignorenot carried
  • Dockerfilenot carried
  • Makefilenot carried
  • build.zignot carried
  • build.zig.zonnot carried
  • flake.locknot carried
  • flake.nixnot carried
What is not in it

A skill installs nothing and depends on nothing: it is a folder your client reads. This one carries 1 script beside the text, so the download is 16 files — not the whole of its source: 7 files are left out. They are listed under the files, with why. The GPL-3.0 licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Fetched Browser Interaction · 15.3k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/fetched-browser-interaction/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/fetched-browser-interaction" ] && { [ ! -e .claude/skills/fetched-browser-interaction ] || { mv .claude/skills/fetched-browser-interaction "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/fetched-browser-interaction" .claude/skills/ && echo "Installed .claude/skills/fetched-browser-interaction"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add longleo287/fetched-browser-interaction

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/fetched-browser-interaction/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/fetched-browser-interaction/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/fetched-browser-interaction" ] && { [ ! -e ~/.claude/skills/fetched-browser-interaction ] || { mv ~/.claude/skills/fetched-browser-interaction "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/fetched-browser-interaction" ~/.claude/skills/ && echo "Installed ~/.claude/skills/fetched-browser-interaction" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/fetched-browser-interaction/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where. Its SKILL.md had no name and description header; the download adds one, so clients load it. Not in this download: 7 files of its source (the full list, and why). Take them from its source.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referencelongleo287/fetched-browser-interaction

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

Reviews

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