skill-creator

A guide for creating skills, which are instruction packages that give an AI agent specialized workflows, domain knowledge, tool connections, and supporting files.

In plain words
What is it for?
It helps create or update skills, including their required instruction file, optional scripts, references, and other resources.
Why use it?
It provides a structure for turning repeated or specialized work into instructions the agent can follow consistently.

Skill for Claude CodeCodex

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 skills/aipexstudio/aipex/skill-creator-browser
Any agent
npx skills add AIPexStudio/AIPex --skill skill-creator-browser
Clone the repo
git clone --depth 1 https://github.com/AIPexStudio/AIPex

Made for: Claude Code, Codex.

Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,942 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 $0.00047 $0.02942
Opus 5 $0.00023 $0.01471
Sonnet 5 $0.00009 $0.00588
Haiku 4.5 $0.00005 $0.00294

Measured yesterday against content hash 2a3b66b337d5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

skill-creator 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 yesterday.

The scan reads SKILL.md. This mod also ships 6 executable files (entrypoints.test.ts, scripts/delete_file.js, scripts/init_skill.js, …), 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.

packages/browser-runtime/src/skill/built-in/skill-creator-browser/SKILL.md · 282 lines

How it starts

The opening of the file, as written. The whole thing — 282 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Creator

This skill provides guidance for creating effective skills.

About Skills

Skills are modular, self-contained packages that extend AIPex's capabilities by providing specialized knowledge, workflows, and tools. Think of them as "onboarding guides" for specific domains or tasks—they transform AIPex from a general-purpose agent into a specialized agent equipped with procedural knowledge that no model can fully possess.

What Skills Provide

  1. Specialized workflows - Multi-step procedures for specific domains
  2. Tool integrations - Instructions for working with specific file formats or APIs
  3. Domain expertise - Company-specific knowledge, schemas, business logic
  4. Bundled resources - Scripts, references, and assets for complex and repetitive tasks

Anatomy of a Skill

Every skill consists of a required SKILL.md file and optional bundled resources:

skill-name/
├── SKILL.md (required)
│   ├── **YAML frontmatter metadata** (required)
│   │   ├── name: (required)
│   │   └── description: (required)
│   └── Markdown instructions (required)
└── Bundled Resources (optional)
    ├── scripts/          - Executable code (JavaScript/Browser/etc.)
    ├── references/       - Documentation intended to be loaded into context as needed
    └── assets/           - Files used in output (templates, icons, fonts, etc.)
SKILL.md (required)

Metadata Quality: The name and description in YAML frontmatter determine when AIPex will use the skill. Be specific about what the skill does and when to use it. Use the third-person (e.g. "This skill should be used when..." instead of "Use this skill when...").

Bundled Resources (optional)
Scripts (scripts/)

Executable code (JavaScript/Browser/etc.) for tasks that require deterministic reliability or are repeatedly rewritten.

  • When to include: When the same code is being rewritten repeatedly or deterministic reliability is needed
  • Example: scripts/rotate_pdf.js for PDF rotation tasks
  • Benefits: Token efficient, deterministic, may be executed without loading into context
  • Main function requirement: Every script must export a main function or have a main function as the entry point. This function serves as the standard interface for executing the script's functionality.
    • Export examples:
      // Option 1: Direct export
      function main(args) {
        // script logic here
      }
      module.exports = main;
      
      // Option 2: Object export
      function main(args) {
        // script logic here
      }
      module.exports = { main };
      
  • Note: Scripts may still need to be read by AIPex for patching or environment-specific adjustments

Read the full file on GitHub · 282 lines

Files

What ships with it

7 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. yesterday First seen · 282 lines · 47 tokens per session scan A 2a3b66b337d5

Subscribe to this mod's changes

skill-creator is a skill published in the GitHub repository AIPexStudio/AIPex (1,247 stars, last pushed 6d ago), licensed MIT. It adds 47 tokens to every session and 2,942 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 2026-08-30.

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