What is skill-creator?

A guide for creating or updating skills, which are reusable instructions that give a coding agent specialised knowledge or workflows.

Use it to design skills, update existing ones, and include specialised instructions, workflows, or tool integrations.

It helps turn a repeated task or domain-specific process into a clearly defined agent capability.

skill-creator — Skill for Claude Code and Codex by harperreed: A guide for creating or updating skills, which are…

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/harperreed/dotfiles/skill-creator

Any agent

npx skills add harperreed/dotfiles --skill skill-creator

Clone the repo

git clone --depth 1 https://github.com/harperreed/dotfiles

Made for: Claude Code, Codex.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/harperreed/dotfiles/skill-creator.svg)](https://agentmods.dev/skills/harperreed/dotfiles/skill-creator)

Your own site

<a href="https://agentmods.dev/skills/harperreed/dotfiles/skill-creator"><img src="https://agentmods.dev/badge/skills/harperreed/dotfiles/skill-creator.svg" alt="Measured on agentmods" height="20"></a>

Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,647 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin unknown 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.

Model	Per session	Once invoked
Fable 5	$0.00046	$0.04647
Opus 5	$0.00023	$0.02323
Sonnet 5	$0.00009	$0.00929
Haiku 4.5	$0.00005	$0.00465

Measured 3d ago against content hash da44c88f6b38, 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 3d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/generate_openai_yaml.py, scripts/init_skill.py, scripts/quick_validate.py), 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.

.codex/skills/.system/skill-creator/SKILL.md · 417 lines

The source is not reproduced here

No licence file

Read it on GitHub

Files

What ships with it

8 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.

3d ago First seen · 417 lines · 46 tokens per session scan A da44c88f6b38

Subscribe to this mod's changes

skill-creator is a skill published in the GitHub repository harperreed/dotfiles (332 stars, last pushed 11d ago), with no licence file. It adds 46 tokens to every session and 4,647 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.

Building agents dotfiles

merge-pr

Merge a pull request with status checks, squash merge, and branch cleanup. Handles worktree contexts.

joshukraine/dotfiles · 23 tokens

checkpoint

Quick 2-minute status update on current phase, completed work, blockers, and health check.

joshukraine/dotfiles · 21 tokens

po-translate

Orchestrate English→Japanese translation of po/ja.po — classify, delegate translation/review to subagents, iterate until clean.

natsukium/dotfiles · 30 tokens

gui-debug

Verify a rendering or window-chrome change in any macOS GUI app unattended — find its CGWindowID via JXA, capture that window alone (with per-pixel alpha) using screencapture -l, and read exact RGBA via NSBitmapImageRep. Use for blur/opacity/corner-radius/glyph/color rendering bugs where a screenshot or pixel value is…

natsukium/dotfiles · 89 tokens

bootstrap-prd

Set up PRD-driven development infrastructure for a new project, including directory structure, templates, and roadmap.

joshukraine/dotfiles · 25 tokens

vibe

Delegate a coding task to a cheap AI model (Mistral Vibe by default, but any provider Vibe knows about — DeepSeek, Gemini Flash, etc.) and supervise the result via git diff. Claude orchestrates, the cheap model codes. Claude consumes 500-1500 tokens per delegation regardless of how many file reads the delegate does…

sebastienrousseau/dotfiles · 137 tokens