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FrekiManagarm
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Skill Builder

Create Codex Skills with YAML frontmatter and progressive disclosure directory structure.

Updated May 8, 2026
Search Tags:#ai agents#progressive disclosure#skill templates#skill builder#skill.md#yaml frontmatter#codex skills
One-click install
npx skills add https://github.com/FrekiManagarm/d-chambaud --skill skill-builder-frekimanagarm
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Skill Builder
Source: https://github.com/FrekiManagarm/d-chambaud/tree/main/.agents/skills/skill-builder
Command: npx skills add https://github.com/FrekiManagarm/d-chambaud --skill skill-builder-frekimanagarm

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Building custom Codex Skills requires knowing the exact SKILL.md format, YAML frontmatter rules, and directory conventions, and mistakes in any of these prevent the skill from being discovered or loaded correctly. ## Core Features & Use Cases - Specification Reference: Documents the required name and description frontmatter fields, character limits, and formatting rules for valid SKILL.md files. - Progressive Disclosure Guidance: Explains the 3-level loading architecture so skills scale to 100+ installs without context bloat. - Ready-to-Use Templates: Provides basic, intermediate, and advanced skill templates plus validation checklists and real-world examples. - Use Case: You want to build a custom skill that generates React components for your team. Use this Skill to scaffold the directory, write a compliant SKILL.md with proper trigger conditions, and organize scripts and resources correctly. ## Quick Start Ask the AI to create a new Codex Skill for your workflow using the Skill Builder templates and specification.

Frequently Asked Questions about Skill Builder

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I create a custom Codex Skill?▼

Create a directory directly under ~/.Codex/skills/ or .Codex/skills/ in your project, then add a SKILL.md file with YAML frontmatter containing name and description fields. The Markdown body below the frontmatter holds the instructions loaded when the skill activates.

What fields are required in SKILL.md frontmatter?▼

Only two fields are required: name (maximum 64 characters) and description (maximum 1024 characters). The description should state both what the skill does and when Codex should invoke it. Additional fields are ignored.

Can Codex Skills be nested in subdirectories?▼

No, skills must be placed directly under ~/.Codex/skills/ or the project-level .Codex/skills/ directory. Codex does not support nested subdirectories or namespaced skill folders.

What is progressive disclosure in Codex Skills?▼

Progressive disclosure is a 3-level loading system: name and description load at startup, the SKILL.md body loads when the skill triggers, and referenced files load only on demand. This keeps context usage minimal even with 100+ installed skills.

Why is my skill not appearing in Codex?▼

Common causes include missing or malformed YAML frontmatter, a directory nested too deep instead of at the top level of the skills folder, or a description exceeding 1024 characters. Restart Codex or refresh Codex.ai after fixing these issues.

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