skill-writer

skill-writer is a skill for Claude Code, Codex from LuizEduPP/Rememb. It costs 47 tokens per session (1,349 once invoked), scanned A, original, MIT.

A guide for creating or redesigning portable AI skills, which are reusable instructions for specialized tasks. It covers their scope, structure, frontmatter, and use across assistants, editors, command-line tools, and chat applications.

In plain words
What is it for?
Use it to create a new skill, update a SKILL.md file, fix its metadata or structure, or remove assumptions about a specific host tool.
Why use it?
It helps keep a skill focused, discoverable, and usable in different environments. It also provides a way to turn a prompt or workflow into a reusable skill.

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/luizedupp/rememb/skill-writer
Any agent
npx skills add LuizEduPP/Rememb --skill skill-writer
Clone the repo
git clone --depth 1 https://github.com/LuizEduPP/Rememb

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.

agentmods badge for skill-writer

README.md
[![agentmods](https://agentmods.dev/badge/skills/luizedupp/rememb/skill-writer.svg)](https://agentmods.dev/skills/luizedupp/rememb/skill-writer)
Your own site
<a href="https://agentmods.dev/skills/luizedupp/rememb/skill-writer"><img src="https://agentmods.dev/badge/skills/luizedupp/rememb/skill-writer.svg" alt="Measured on agentmods" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,349 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 $0.01349
Opus 5 $0.00023 $0.00674
Sonnet 5 $0.00009 $0.00270
Haiku 4.5 $0.00005 $0.00135

Measured 4d ago against content hash 6ea64435bf69, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

skill-writer 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.

src/rememb_skills/skill-writer/SKILL.md · 205 lines

How it starts

The opening of the file, as written. The whole thing — 205 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Writer

Overview

Use this skill to create or refactor skills that stay focused, portable, and easy to discover. The primary workflow should work across assistants, IDEs, CLIs, and chat applications without assuming a specific host.

When to Use

Use this skill when:

  • Creating a new skill from scratch
  • Updating or redesigning an existing SKILL.md
  • Fixing frontmatter, structure, or discovery quality
  • Converting a prompt or workflow into a reusable skill
  • Making an existing skill more host-agnostic

Core Workflow

1. Define the skill boundary

First determine the exact capability the skill should provide.

  • What outcome should the skill produce?
  • When should the skill activate?
  • What inputs, files, or tools does it rely on?
  • Which parts are universal, and which are host-specific?

Keep the scope narrow. One skill should solve one coherent problem.

2. Choose the skill root

Pick a concrete <skill-root> that matches the current environment. The skill itself should not assume whether that root is user-level, workspace-level, registry-managed, or tool-managed.

Install the skill under:

<skill-root>/skill-name/

If the environment supports multiple installation scopes, choose the scope that matches the user's intent and team-sharing needs.

3. Create the file layout

Every skill needs SKILL.md. Add supporting files only when they improve clarity or reuse.

skill-name/
├── SKILL.md
├── reference.md
├── examples.md
├── scripts/
└── templates/

Use supporting files for progressive disclosure. Keep the main SKILL.md readable without hiding core behavior in references.

4. Write minimal, valid frontmatter

Use YAML frontmatter with stable, discovery-friendly fields.

---
name: skill-name
description: Brief description of what this does and when to use it
---

Frontmatter rules:

  • name should be lowercase, stable, and directory-aligned
  • description should explain both capability and activation context
  • Optional metadata should be added only when the host actually uses it
  • Tool restrictions should be explicit when they improve safety or focus

Read the full file on GitHub · 205 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 · 205 lines · 47 tokens per session scan A 6ea64435bf69

Subscribe to this mod's changes

skill-writer is a skill published in the GitHub repository LuizEduPP/Rememb (4 stars, last pushed 1mo ago), licensed MIT. It adds 47 tokens to every session and 1,349 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 2026-08-31.

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