skill-generator

skill-generator is a skill for Claude Code from k1lgor/virtual-company. It costs 27 tokens per session (3,498 once invoked), scanned A, original, MIT.

A method for creating, checking, and updating skills, where a skill is a set of instructions for an agent. It requires a failing test before a new skill or change is deployed.

In plain words
What is it for?
Use it to create skills, debug SKILL.md files, evolve existing skills, and validate skill definitions with validate-skill.sh.
Why use it?
It helps catch unclear or unreliable instructions before they are used in production. It also provides checks for existing SKILL.md files, which store skill instructions.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions CLAUDE.md.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is <project_root>/scripts/validate-skill.sh ./skills/new-skill/SKILL.md.

Part of the virtual-company plugin — 27 skills, 1 command, 6 agents, 3 hooks shipped together

Good fit Use it to create skills, debug SKILL.md files, evolve existing skills, and validate skill definitions with validate-skill.sh.

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/k1lgor/virtual-company
agentmods
npx agentmods add skills/k1lgor/virtual-company/26-skill-generator

Made for: Claude Code.

Or install virtual-company, the plugin that ships this one along with the rest of its 27 skills, 1 command, 6 agents, 3 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 skill-generator

README.md
[![agentmods](https://agentmods.dev/badge/skills/k1lgor/virtual-company/26-skill-generator/github.svg)](https://agentmods.dev/skills/k1lgor/virtual-company/26-skill-generator)
Your own site
<a href="https://agentmods.dev/skills/k1lgor/virtual-company/26-skill-generator"><img src="https://agentmods.dev/badge/skills/k1lgor/virtual-company/26-skill-generator/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 skill-generator

Your own site · 80×15
<a href="https://agentmods.dev/skills/k1lgor/virtual-company/26-skill-generator"><img src="https://agentmods.dev/badge/skills/k1lgor/virtual-company/26-skill-generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,498 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 $0.00027 $0.03498
Opus 5 $0.00014 $0.01749
Sonnet 5 $0.00005 $0.00700
Haiku 4.5 $0.00003 $0.00350

Measured 10d ago against content hash c8833d41c9d7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

skill-generator 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.

skills/26-skill-generator/SKILL.md · 408 lines

How it starts

The opening of the file, as written. The whole thing — 408 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🛠️ Skill Generator / Meta-Architect

You are the Lead Skill Architect. You create "The Experts" that populate the Virtual Company, ensuring every new skill is precise, effective, and battle-tested.

🛑 The Iron Law

NO SKILL WITHOUT A FAILING TEST FIRST

This applies to NEW skills AND EDITS to existing skills. Write the skill, test it with a pressure scenario, watch it work, then deploy. Skipping testing = deploying untested code.

🛠️ Tool Guidance

  • Market Research: Use Bash to find the latest system prompt best practices.

  • Deep Audit: Use Read to audit existing SKILL.md files for consistency.

  • Execution: Use Edit to create a new folder and SKILL.md for the new domain expert.

  • Quality Gate: Use validate-skill.sh to enforce skill quality standards:

    <project_root>/scripts/validate-skill.sh ./skills/new-skill/SKILL.md
    

📍 When to Apply

  • "Create a new skill for Web Scraping."
  • "Debug this SKILL.md file—it's not working well."
  • "Evolve our existing 'backend' skill to include GraphQL."
  • "Validate all skills in the repository."

Decision Tree: Skill Creation Flow

graph TD
    A[Need a new skill?] --> B{Does an existing skill cover it?}
    B -->|Yes| C[Evolve existing skill]
    B -->|No| D{Is it a reusable technique?}
    D -->|No| E[Don't create a skill — use CLAUDE.md or docs]
    D -->|Yes| F[RED: Run pressure scenario WITHOUT skill]
    F --> G[Document baseline failures]
    G --> H[GREEN: Write skill addressing failures]
    H --> I{Skill has all required sections?}
    I -->|No| J[Add missing sections]
    J --> I
    I -->|Yes| K[REFACTOR: Re-run scenario WITH skill]
    K --> L{Agent complies?}
    L -->|No| M[Identify new rationalizations → close loopholes]
    M --> H
    L -->|Yes| N{Any NEW failure modes discovered?}
    N -->|Yes| O[Add to failure modes table]
    O --> N
    N -->|No| P[✅ Skill ready for deployment]

Read the full file on GitHub · 408 lines

Files

What ships with it

1 file 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. 10d ago First seen · 408 lines · 27 tokens per session scan A c8833d41c9d7

Subscribe to this mod's changes

skill-generator is a skill published in the GitHub repository k1lgor/virtual-company (4 stars, last pushed 2mo ago), licensed MIT. It adds 27 tokens to every session and 3,498 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 2026-08-31.

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