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Markdown Post Frontmatter Validation

Category: Engineering  ·  Sub-category: engineering-misc  ·  Last updated:
type:review
Use when authoring or reviewing the frontmatter of a markdown post — checking required fields (title, date, slug, tags), validating against the content schema in `lib/content/schema.ts`, catching ambiguous date formats or tags not in the controlled vocabulary, and ensuring the slug matches the file path. Activate this skill whenever the task touches files under `content/posts/**/*.md`, the `parsePostFrontmatter()` helper, or any code path that reads YAML frontmatter from a content file. Do NOT use for general YAML schema design (use a generic schema-design skill) or for chasing a specific build-time validation failure (use debugging).

What this skill does

Markdown Post Frontmatter Validation is a community-contributed Claude Code skill in the engineering-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/markdown-post-frontmatter-validation/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when authoring or reviewing the frontmatter of a markdown post — checking required fields (title, date, slug, tags), validating against the content schema in `lib/content/schema.ts`, catching ambiguous date formats or tags not in the controlled vocabulary, and ensuring the slug matches the file path.

Who uses this skill

The Markdown Post Frontmatter Validation Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/markdown-post-frontmatter-validation
curl -L https://claudskills.com/skills/markdown-post-frontmatter-validation/SKILL.md \
  -o ~/.claude/skills/markdown-post-frontmatter-validation/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/markdown-post-frontmatter-validation/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/markdown-post-frontmatter-validation/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\markdown-post-frontmatter-validation\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

More Engineering skills

Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Engineering skills → Top 100 skills
Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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