Pre-fetch verified selectors from Actionbook Agent Skill

Run browser-based web tests against websites using Actionbook CLI.

Context cost
26.3k tokensestimated from the bundle, loaded when it triggers
Bundle
8 files · 116.1 kB1 script among them — read before you run
Licence
Apache-2.0the author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Run browser-based web tests against websites using Actionbook CLI. Activate when the user wants to test a website workflow, run smoke tests, verify a user flow, check if a web application works, run regression tests, or validate browser-based interactions. Supports test definition, execution, assertion, reporting, and json-ui visual report generation.

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.

securitytesting

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md38.7 kB · preview
--- name: actionbook-web-test ---
6## When to Use This Skill
7
8Activate when the user:
9
10- Asks to "test", "verify", "check", or "validate" a website workflow
11- Wants to run smoke tests or health checks on a web application
12- Needs to verify a user flow works end-to-end (login, checkout, search, etc.)
13- Asks to "run regression tests" or "does this still work?"
14- Wants to confirm a deployment didn't break functionality
15- Needs to monitor a website's functionality on a schedule
16- Builds browser-based test suites without writing Playwright/Cypress code
17
18## What actionbook-web-test Provides
19
20actionbook-web-test transforms web tests from coded test scripts into **declarative YAML workflows** executed by AI agents via Actionbook CLI.
21
22| Benefit | How |
23|---------|-----|
24| **AI-native recovery** | When a selector fails, the agent snapshots the live page and finds the equivalent element |
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md5,075 words
Files8
LicenceApache-2.0
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.

≈100
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
26,150
on trigger
The instruction body and 7 supporting files, read only when the skill fires.
13.1%
of a 200k window
Ten skills this size would not fit in the window together.
050k100k150k200k context window

26.3k 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: the start of it is shown above, and the whole file comes with the install.

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

8 files, 116.1 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.

  • SKILL.md38.7 kB
  • package.json0.1 kB
  • README.md7.8 kB
  • references/assertion-types.md18.7 kB
  • references/report-format.md18.0 kB
  • references/workflow-format.md17.4 kB
  • tests/generate-report.mjs11.1 kB
  • tests/reddit-ui-smoke.yaml4.3 kB
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 bundle is 8 files you can review in full before installing. The Apache-2.0 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.

# Pre-fetch verified selectors from Actionbook · 26.3k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/pre-fetch-verified-selectors-from-actionbook/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/pre-fetch-verified-selectors-from-actionbook" ] && { [ ! -e .claude/skills/pre-fetch-verified-selectors-from-actionbook ] || { mv .claude/skills/pre-fetch-verified-selectors-from-actionbook "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/pre-fetch-verified-selectors-from-actionbook" .claude/skills/ && echo "Installed .claude/skills/pre-fetch-verified-selectors-from-actionbook"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add actionbook/pre-fetch-verified-selectors-from-actionbook

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/pre-fetch-verified-selectors-from-actionbook/ 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/pre-fetch-verified-selectors-from-actionbook/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/pre-fetch-verified-selectors-from-actionbook" ] && { [ ! -e ~/.claude/skills/pre-fetch-verified-selectors-from-actionbook ] || { mv ~/.claude/skills/pre-fetch-verified-selectors-from-actionbook "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/pre-fetch-verified-selectors-from-actionbook" ~/.claude/skills/ && echo "Installed ~/.claude/skills/pre-fetch-verified-selectors-from-actionbook" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/pre-fetch-verified-selectors-from-actionbook/ 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. It appears as actionbook-web-test in Gemini CLI, Codex, Copilot and Grok (its own name); Claude Code lists it by the folder name, pre-fetch-verified-selectors-from-actionbook.

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
Referenceactionbook/pre-fetch-verified-selectors-from-actionbook

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.

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