# Syn Markdown Frontmatter

> Skill for editing YAML frontmatter in the context of Markdown documents. Use when the user's task is specifically about editing YAML frontmatter.

- Skill: `legendtkl/syn-markdown-frontmatter` (Agent Skill)
- Install (CLI): `npx skillmds@latest add legendtkl/syn-markdown-frontmatter`
- Raw SKILL.md: https://api.skillmd.com/api/skills/legendtkl/syn-markdown-frontmatter/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Docs & Writing
- Author: legendtkl (https://skillmd.com/u/legendtkl)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/legendtkl/syn-markdown-frontmatter

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# Markdown documents: editing YAML frontmatter

## When to use

Use this skill for editing YAML frontmatter in Markdown documents. This skill
specifically handles editing YAML frontmatter and nothing else in the
Markdown documents family.

## Procedure

Read, validate, and bulk-edit YAML frontmatter fields across many Markdown files.

## Notes

This is the Markdown documents skill dedicated to editing YAML frontmatter.
Sibling skills cover other Markdown documents capabilities; this one
is the right choice only when the task is about editing YAML frontmatter.