benchmark

benchmark is a skill for Claude Code from voidmatcha/ui-clone-skills. It costs 152 tokens per session (8,531 once invoked), scanned A, original, Apache-2.0.

A local regression-testing tool for maintainers of website-cloning tools. It runs the standard cloning process against a reference website and records visual scores and other results.

In plain words
What is it for?
Use it to run repeatable website-cloning benchmarks, compare visual similarity, count failed checks and iterations, and save outcomes in a history file.
Why use it?
It makes changes easier to compare over time, so maintainers can spot when prompts, documentation, or model updates make the cloning process worse.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions .claude-plugin; mentions CLAUDE.md; mentions Claude Code.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is bash skills/visual-debug/scripts/extract-dom.sh "$REF_DIR" realfood-bench '.target-selector'.

Part of the ui-clone-skills plugin — 4 skills, 6 agents, 6 hooks shipped together

Good fit Use it to run repeatable website-cloning benchmarks, compare visual similarity, count failed checks and iterations, and save outcomes in a history file.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/voidmatcha/ui-clone-skills
agentmods
npx agentmods add skills/voidmatcha/ui-clone-skills/benchmark

Made for: Claude Code.

Or install ui-clone-skills, the plugin that ships this one along with the rest of its 4 skills, 6 agents, 6 hooks.

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 benchmark

README.md
[![agentmods](https://agentmods.dev/badge/skills/voidmatcha/ui-clone-skills/benchmark/github.svg)](https://agentmods.dev/skills/voidmatcha/ui-clone-skills/benchmark)
Your own site
<a href="https://agentmods.dev/skills/voidmatcha/ui-clone-skills/benchmark"><img src="https://agentmods.dev/badge/skills/voidmatcha/ui-clone-skills/benchmark/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 benchmark

Your own site · 80×15
<a href="https://agentmods.dev/skills/voidmatcha/ui-clone-skills/benchmark"><img src="https://agentmods.dev/badge/skills/voidmatcha/ui-clone-skills/benchmark.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 152 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 8,531 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 5 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 35
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
  • medium Agent Snooping · line 39
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
  • medium MCP Rug Pull · line 362
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium MCP Rug Pull · line 435
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium Excessive Agency · line 486
    Skill allows unbounded resource consumption (API calls, storage, compute). Without rate limits or quotas, a compromised or misbehaving agent can cause denial-of-service or cost overruns.
    Fix: Set explicit rate limits, timeouts, and resource quotas for API calls, file operations, and compute. Implement circuit breakers for runaway loops.
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 $0.00152 $0.08531
Opus 5.5 $0.00061 $0.03412
Sonnet 5.5 $0.00030 $0.01706
Haiku 4.5 $0.00015 $0.00853

Measured 1mo ago against content hash 46331b10e05c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

benchmark 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 1mo ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/benchmark-harvest.sh, scripts/setup.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/benchmark/SKILL.md · 678 lines

How it starts

The opening of the file, as written. The whole thing — 678 lines — stays where its author put it; the contents beside it link to each section on GitHub.

benchmark — local regression / benchmark skill

⚡ Activation sentinel (READ FIRST)

The FIRST RESPONSE you generate after reading this file in reaction to a "run benchmark" / "regression benchmark" / "benchmark clone" trigger MUST begin with the exact line below — no decoration, no preamble, no header above it:

[BENCHMARK-SKILL-ACTIVE v1 / skills/benchmark/SKILL.md]

Concretely: the response that comes right after the tool-result of your Read(skills/benchmark/SKILL.md). Reading this file IS the start of execution; do not defer the sentinel to a later "more real" response, do not announce the rule in prose instead of emitting the token, do not prepend a step heading. The first line of that response is the token itself, and only the token. Anything else (Step 1 announcement, bash skills/benchmark/scripts/setup.sh call, status notes) goes below it on subsequent lines.

Only that one response needs the sentinel — later responses in the same session do not need to repeat it. Empirically, LLMs drop a per-message prepend after a few turns even when the rule says "every response," so a single emission anchored to the post-read response is the reliable signal the maintainer checks.

Edge case — tool-only first turn. If the response immediately after the SKILL.md Read would otherwise contain only a tool call with no text (e.g. you decide to dispatch bash skills/benchmark/scripts/setup.sh without saying anything), prefix that turn with the sentinel as a one-line text message before the tool call. The text-only line is the sentinel; the tool dispatch follows on the next line. Do not skip the sentinel just because the turn would have been silent.

Maintainer-shell note. In some maintainer environments ls is aliased to eza, where ls -t fails with -t needs a value (modified|...). Inside benchmark commands prefer the portable forms \ls -1t, /bin/ls -t, or find ... -printf '%T@ %p\n' | sort -rn instead of bare ls -t so the pipeline doesn't break on the maintainer's shell.

Read the full file on GitHub · 678 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago First seen · 678 lines · 152 tokens per session scan A 46331b10e05c

Subscribe to this mod's changes

benchmark is a skill published in the GitHub repository voidmatcha/ui-clone-skills (15 stars, last pushed 24d ago), licensed Apache-2.0. It adds 152 tokens to every session and 8,531 once invoked, about $0.0006 per session on Opus 5.5. 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 2026-08-31.

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