Writing Skills

Writing skills IS Test-Driven Development applied to process documentation. Personal skills live in agent-specific directories ( for Claude Code, for Codex) You write test cases (pressure scenarios wi

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Last updated: April 3, 2026

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name: writing-skills description: Use when creating new skills, editing existing skills, or verifying skills work before deployment

Writing Skills

Overview

Writing skills IS Test-Driven Development applied to process documentation.

Personal skills live in agent-specific directories (

~/.claude/skills

for Claude Code,
~/.codex/skills
for Codex)

You write test cases (pressure scenarios with subagents), watch them fail (baseline behavior), write the skill (documentation), watch tests pass (agents comply), and refactor (close loopholes).

Core principle: If you didn't watch an agent fail without the skill, you don't know if the skill teaches the right thing.

REQUIRED BACKGROUND: You MUST understand superpowers:test-driven-development before using this skill. That skill defines the fundamental RED-GREEN-REFACTOR cycle. This skill adapts TDD to documentation.

Official guidance: For Anthropic's official skill authoring best practices, see anthropic-

Writing Skills

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name: writing-skills description: Use when creating new skills, editing existing skills, or verifying skills work before deployment

Writing Skills

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