devkit.verify-skill

devkit.verify-skill is a command for coding agents from giuseppe-trisciuoglio/developer-kit. It costs 29 tokens per session (1,768 once invoked), scanned A, original, MIT.

A command for checking whether a Claude Code skill meets Claude Code Developer Kit standards. A skill is a packaged set of instructions and supporting files for a coding assistant.

In plain words
What is it for?
Use it after creating or changing a skill, with the skill's name as the argument. It searches project and user skill folders and validates the found skill against the kit's rules.
Why use it?
It catches missing files, incorrect structure, and unmet requirements before a skill is published or reused. It also checks the expected locations and dependencies.

Command

Part of the developer-kit-core plugin — 8 skills, 6 commands, 7 agents, 1 hook shipped together

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.

agentmods
npx agentmods add commands/giuseppe-trisciuoglio/developer-kit/devkit.verify-skill
Clone the repo
git clone --depth 1 https://github.com/giuseppe-trisciuoglio/developer-kit

Or install developer-kit-core, the plugin that ships this one along with the rest of its 8 skills, 6 commands, 7 agents, 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 devkit.verify-skill

README.md
[![agentmods](https://agentmods.dev/badge/commands/giuseppe-trisciuoglio/developer-kit/devkit.verify-skill.svg)](https://agentmods.dev/commands/giuseppe-trisciuoglio/developer-kit/devkit.verify-skill)
Your own site
<a href="https://agentmods.dev/commands/giuseppe-trisciuoglio/developer-kit/devkit.verify-skill"><img src="https://agentmods.dev/badge/commands/giuseppe-trisciuoglio/developer-kit/devkit.verify-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,768 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00029 $0.01768
Opus 5 $0.00015 $0.00884
Sonnet 5 $0.00006 $0.00354
Haiku 4.5 $0.00003 $0.00177

Measured 4d ago against content hash f5d027966b31, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

devkit.verify-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 4d 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.

plugins/developer-kit-core/commands/devkit.verify-skill.md · 214 lines

How it starts

The opening of the file, as written. The whole thing — 214 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verify Skill: $1

Overview

You are a skill validation specialist for the Claude Code Developer Kit. Your task is to perform a comprehensive validation of the skill "$1" against all DevKit standards.

Usage

/devkit.verify-skill $ARGUMENTS

Arguments

Argument Description
$ARGUMENTS Combined arguments passed to the command

Execution Instructions

Agent Selection: To execute this task, use the following approach:

  • Primary: Use general-purpose agent with appropriate domain expertise
  • Or use specialized agent if available for the specific task type

Validation Process

Execute the following checks in sequence:

1. Skill Existence Check

  • Search for the skill directory in the following locations (in this order):
    • .claude/skills/$1/ (project-level)
    • ~/.claude/skills/$1/ (user-level)
    • ./skills/**/$1/ (any category subfolder under the repo skills/ directory — recursive search)
    • Any other project-local plugin directories that the repository documents for skills (if present)
  • Verify that a SKILL.md file exists inside the found skill directory
  • Important: many development workflows (for example when authoring a Claude plugin or a shared skills repo) keep skills under top-level skills/ categories (e.g. skills/langchain4j/<skill-name>). This is an acceptable and supported location for the purposes of validation and MUST NOT be treated as a false-positive or as a failure just because .claude/skills/ or ~/.claude/skills/ do not contain the skill.
  • If the skill cannot be found in any of the locations above, report failure (Existence).

2. Requirements Conformance (@.docs/skills.md)

Check that the skill complies with all requirements from the official Skills documentation:

SKILL.md Frontmatter:

  • name field: lowercase letters, numbers, hyphens only (max 64 characters)
  • description field: present and descriptive (max 1024 characters). Description includes BOTH what the skill does AND when to use it
  • allowed-tools field: uses valid tool names only
  • category: field, valid category
  • tags: field, relevant, and descriptive (no generic tags like "skill" or "devkit")
  • version field: uses semantic versioning (e.g., 1.0.0) Important: Other frontmatter fields are not allowed.

Read the full file on GitHub · 214 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. 4d ago First seen · 214 lines · 29 tokens per session scan A f5d027966b31

Subscribe to this mod's changes

devkit.verify-skill is a command published in the GitHub repository giuseppe-trisciuoglio/developer-kit (338 stars, last pushed 16d ago), licensed MIT. It adds 29 tokens to every session and 1,768 once invoked, about $0.0001 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 2026-08-30.