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cpv-scaffold-skill

cpv-scaffold-skill is a skill for Claude Code from Emasoft/claude-plugins-validation. It costs 67 tokens per session (846 once invoked), scanned A, original, MIT.

A skill generator for adding a new skill to an existing Claude Code plugin.

In plain words
What is it for?
Use it to create a skill with a name, description, and trigger phrase, then update the plugin documentation.
Why use it?
It creates the expected folder and metadata, so the new skill starts in a valid form.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions .claude-plugin.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the claude-plugins-validation plugin — 52 skills, 14 commands, 14 agents shipped together

not rated 4repo 3d ago A scan 67 tokens original MIT

Good fit Use it to create a skill with a name, description, and trigger phrase, then update the plugin documentation.

Compare 6 skills from other repositories ↓
View source ↗ Emasoft/claude-plugins-validation
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add Emasoft/claude-plugins-validation
Claude Code
/plugin install claude-plugins-validation

Made for: Claude Code.

Or install claude-plugins-validation, the plugin that ships this one along with the rest of its 52 skills, 14 commands, 14 agents.

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 cpv-scaffold-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/emasoft/claude-plugins-validation/cpv-scaffold-skill/github.svg)](https://agentmods.dev/skills/emasoft/claude-plugins-validation/cpv-scaffold-skill)
Your own site
<a href="https://agentmods.dev/skills/emasoft/claude-plugins-validation/cpv-scaffold-skill"><img src="https://agentmods.dev/badge/skills/emasoft/claude-plugins-validation/cpv-scaffold-skill/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 cpv-scaffold-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/emasoft/claude-plugins-validation/cpv-scaffold-skill"><img src="https://agentmods.dev/badge/skills/emasoft/claude-plugins-validation/cpv-scaffold-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 67 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 846 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 $0.00067 $0.00846
Opus 5.5 $0.00027 $0.00338
Sonnet 5.5 $0.00013 $0.00169
Haiku 4.5 $0.00007 $0.00085

Measured 1mo ago against content hash 0e0108ebae11, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cpv-scaffold-skill 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.

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/cpv-scaffold-skill/SKILL.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

cpv-scaffold-skill

Overview

Adds a new skill to an existing plugin. The scaffold lands at <plugin-path>/skills/<skill-name>/SKILL.md with valid frontmatter so the plugin still passes validate_plugin immediately. Loaded dynamically via cpv-the-skills-menu, reached via the Create → Add skill menu branch.

Prerequisites

  • uv on PATH
  • Target plugin path with .claude-plugin/plugin.json
  • Kebab-case skill name (e.g. my-skill)
  • A short description that includes a "Use when ..." trigger phrase

Instructions

  1. Pick a kebab-case skill name ([a-z][a-z0-9-]*).
  2. Write a description that includes a "Use when ..." trigger phrase so agents know when to load it.
  3. Run add_component.py --type skill with the plugin path, name, and description.
  4. skills/<name>/ directory is auto-created if missing.
  5. After scaffolding, refresh the README so the new skill appears in the auto-components block.
  6. Optionally validate the plugin to confirm the new skill passes.

Copy this checklist and track your progress:

  • Skill name kebab-case
  • Description contains "Use when ..." trigger
  • add_component.py --type skill executed
  • skills/<name>/SKILL.md created
  • refresh_readme.py run
  • validate_plugin --strict re-run

Output

  • A new file at <plugin-path>/skills/<skill-name>/SKILL.md.
  • Frontmatter emits only name and description — the minimal pair that passes validate_plugin. Optional fields like when_to_use, user-invocable, and allowed-tools are NOT scaffolded; add them by hand if the skill needs them (put a "Use when ..." trigger in the description so agents know when to load it).
  • The skill name must be kebab-case.
  • Existing files are NEVER overwritten unless --force is passed.

Error Handling

Error Resolution
Name not kebab-case Use only [a-z0-9-], starting with a letter
File exists Re-run with --force only if you mean to overwrite
Target not a plugin Verify .claude-plugin/plugin.json at the path
Description missing "Use when" Edit frontmatter to add a trigger phrase
Skill never auto-loaded Confirm description matches an agent's task pattern

Read the full file on GitHub · 76 lines

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 · 76 lines · 67 tokens per session scan A 0e0108ebae11

Subscribe to this mod's changes

cpv-scaffold-skill is a skill published in the GitHub repository Emasoft/claude-plugins-validation (4 stars, last pushed 3d ago), licensed MIT. It adds 67 tokens to every session and 846 once invoked, about $0.0003 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 2026-09-03.

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