validate-artifact

validate-artifact is a skill for Claude Code from All-The-Vibes/ATV-PaperBoard. It costs 41 tokens per session (241 once invoked), scanned A, original, Apache-2.0.

A checker for a rendered design artifact and its accompanying DESIGN.md file. It verifies the design notes and checks that every color written in the HTML is declared in those notes.

In plain words
What is it for?
Use it after rendering an artifact, when a reviewer requests validation, or before publishing it. It reports whether the artifact is accepted or failed, including the type of failure.
Why use it?
It catches mismatches between an artifact's documented design rules and its actual HTML before the artifact is published or saved as final.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the atv-paperboard plugin — 5 skills, 1 agent, 1 hook shipped together

Good fit Use it after rendering an artifact, when a reviewer requests validation, or before publishing it. It reports whether the artifact is accepted or failed, including the type of failure.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/all-the-vibes/atv-paperboard/validate-artifact
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.

Any agent
npx skills add All-The-Vibes/ATV-PaperBoard --skill validate-artifact
Clone the repo
git clone --depth 1 https://github.com/All-The-Vibes/ATV-PaperBoard

Made for: Claude Code.

Or install atv-paperboard, the plugin that ships this one along with the rest of its 5 skills, 1 agent, 1 hook.

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 validate-artifact

README.md
[![agentmods](https://agentmods.dev/badge/skills/all-the-vibes/atv-paperboard/validate-artifact/github.svg)](https://agentmods.dev/skills/all-the-vibes/atv-paperboard/validate-artifact)
Your own site
<a href="https://agentmods.dev/skills/all-the-vibes/atv-paperboard/validate-artifact"><img src="https://agentmods.dev/badge/skills/all-the-vibes/atv-paperboard/validate-artifact/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 validate-artifact

Your own site · 80×15
<a href="https://agentmods.dev/skills/all-the-vibes/atv-paperboard/validate-artifact"><img src="https://agentmods.dev/badge/skills/all-the-vibes/atv-paperboard/validate-artifact.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 241 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.
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 $0.00241
Opus 5 $0.00020 $0.00120
Sonnet 5 $0.00008 $0.00048
Haiku 4.5 $0.00004 $0.00024

Measured 10d ago against content hash 5e15e7507932, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

validate-artifact 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 10d 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.

adapters/claude-code/_dist/skills/validate-artifact/SKILL.md · 36 lines

What it actually says

validate-artifact

Enforces design contract compliance on a previously rendered artifact.

Usage

paperboard validate <slug>

When to invoke

  • After render-artifact completes, to confirm the artifact is compliant.
  • When the artifact-reviewer agent requests validation.
  • Before publishing or persisting an artifact as final.

Checks performed

  1. lint@google/design.md JSON lint on the paired DESIGN.md sidecar.
  2. color-trace — Every inline hex color in the HTML must appear in the DESIGN.md Colors section.

Output

Prints one of:

  • ✓ ACCEPT slug=<slug> — all checks passed; exit 0.
  • ✗ FAIL(<fail_class>) slug=<slug> — details follow; exit 1.

fail_class is one of: none | lint | color-trace | environment

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. 10d ago First seen · 36 lines · 41 tokens per session scan A 5e15e7507932

Subscribe to this mod's changes

validate-artifact is a skill published in the GitHub repository All-The-Vibes/ATV-PaperBoard (1 stars, last pushed 25d ago), licensed Apache-2.0. It adds 41 tokens to every session and 241 once invoked, about $0.0002 per session on Opus 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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