agents-at-scale-ark: Skill for Claude Code

.claude/skills/dashboard/SKILL.md

Ark Dashboard and UI Testing is a skill for Claude Code from mckinsey/agents-at-scale-ark. It costs 41 tokens per session (511 once invoked), scanned A, original, Apache-2.0.

A browser-testing workflow for checking the Ark dashboard with Playwright, a tool that controls a web browser automatically, and adding screenshots to pull requests.

In plain words
What is it for?
It is for testing dashboard interactions, capturing screenshots, and preparing those screenshots for pull requests.
Why use it?
It helps verify that dashboard changes work as expected and gives reviewers visual evidence of the result.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is mckinsey/agents-at-scale-ark's own configuration. It tells Claude Code how to work on agents-at-scale-ark itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agents-at-scale-ark configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is cp ./screenshots/*.png scratch/pull-request-attachments/<org>_<repo>/.

Reuse

Borrowing it

Nothing to install: this file belongs to mckinsey/agents-at-scale-ark. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/mckinsey/agents-at-scale-ark/main/.claude/skills/dashboard/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/mckinsey/agents-at-scale-ark

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 Ark Dashboard and UI Testing

README.md
[![agentmods](https://agentmods.dev/badge/skills/mckinsey/agents-at-scale-ark/dashboard/github.svg)](https://agentmods.dev/skills/mckinsey/agents-at-scale-ark/dashboard)
Your own site
<a href="https://agentmods.dev/skills/mckinsey/agents-at-scale-ark/dashboard"><img src="https://agentmods.dev/badge/skills/mckinsey/agents-at-scale-ark/dashboard/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Ark Dashboard and UI Testing

Your own site · 80×15
<a href="https://agentmods.dev/skills/mckinsey/agents-at-scale-ark/dashboard"><img src="https://agentmods.dev/badge/skills/mckinsey/agents-at-scale-ark/dashboard.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 511 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00041 $0.00511
Opus 5 $0.00020 $0.00255
Sonnet 5 $0.00008 $0.00102
Haiku 4.5 $0.00004 $0.00051

Measured 6d ago against content hash 2577273f7ce0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

Ark Dashboard and UI Testing scanned grade A with 1 finding 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl http://localhost:3000
.claude/skills/dashboard/SKILL.md · 75 lines

What it actually says

Ark Dashboard and UI

Test Ark Dashboard UI with Playwright and attach screenshots to PRs.

When to use this skill

Use this skill when:

  • User wants to test the Ark dashboard
  • User needs screenshots for a PR
  • User asks to validate dashboard UI changes

Prerequisites

CRITICAL: Before proceeding, verify Kubernetes is available:

kubectl cluster-info

If this fails, STOP and inform the user:

Cannot continue without a Kubernetes environment. Please ensure Kind or another Kubernetes cluster is running and kubectl is configured.

Ark must be deployed first. Use the ark-setup skill if needed.

Setup

Port forward the dashboard and warm up:

kubectl port-forward svc/ark-dashboard 3000:3000 -n default &
curl http://localhost:3000

Test with Playwright

Use Playwright MCP tools to navigate and screenshot:

  • browser_navigate - Open pages
  • browser_wait_for - Wait for elements
  • browser_click - Click elements
  • browser_take_screenshot - Capture screenshots

Screenshots save to .playwright-mcp/screenshots/. Move to ./screenshots/ for organization.

Upload Screenshots for PRs

Check if user has a scratch repo:

gh repo view <USERNAME>/scratch

If not, suggest creating: scratch/pull-request-attachments/<org>_<repo>/

Upload screenshots:

cd /tmp && git clone [email protected]:<USERNAME>/scratch.git
mkdir -p scratch/pull-request-attachments/<org>_<repo>
cp ./screenshots/*.png scratch/pull-request-attachments/<org>_<repo>/
cd scratch && git add . && git commit -m "chore: screenshots for <org>/<repo> PR" && git push

Reference in PR body:

![Screenshot](https://raw.githubusercontent.com/<USERNAME>/scratch/master/pull-request-attachments/<org>_<repo>/01-screenshot.png)

Update PR:

gh api repos/<org>/<repo>/pulls/<NUMBER> -X PATCH -f body="..."
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 · 75 lines · 41 tokens per session scan A 2577273f7ce0

Subscribe to this mod's changes

Ark Dashboard and UI Testing is a skill published in the GitHub repository mckinsey/agents-at-scale-ark (422 stars, last pushed today), licensed Apache-2.0. It adds 41 tokens to every session and 511 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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