Automated summary

Validates Markdown files with YAML frontmatter against JSON Schema definitions.

Strengths

Automates quality checks for structured content in Markdown files.
Provides clear error messages with field path and file location.
Simple single-command usage.

Limitations

Requires a schema.yaml file in the target directory.
Depends on Python and the pyyaml and jsonschema libraries.
Only validates YAML frontmatter, not the Markdown body.

When to use it

To validate structured Markdown files with YAML metadata (e.g., CRM entries, documentation pages) in a repeatable manner.

When not to use it

For validating free-form Markdown content without frontmatter or when the schema is unknown.

Security analysis

Safe

Quality score85/100

The skill instructs running a Python validation script on markdown files; no destructive, exfiltrating, or obfuscated actions are present. The script is not included, but the skill itself contains no malicious instructions.

No concerns found

How this analysis is made

Examples

Validate all files in a directory

Run validation on the crm/contacts directory to check all markdown files against the schema.

Fix a missing required field

Validate the crm/opportunities directory and fix any missing required fields like 'stage'.

name: validate-md description: Validates markdown files with YAML frontmatter against JSON Schema definitions. allowed-tools: [Bash, Read, Glob]

Validating Markdown Files

Name: Markdown File Validation
Author: Skills Guide Bot

Instructions

Run validation script for the target directory containing a schema.yaml file:
```
python validate-md.py <directory>
```
Review results:
- Success: ✓ OK: filename.md is valid
- Errors: Shows validation error, field path, and file location

Examples

Example 1: Validate contacts directory

python validate-md.py crm/contacts

Output:

✓ OK: smith-john.md is valid
✓ OK: doe-jane.md is valid
✓ SUCCESS: All 2 files are valid!

Example 2: Validation error - missing required field

python validate-md.py crm/opportunities

Output:

❌ deal-2024-q1.md validation error: 'stage' is a required property
   In file: crm/opportunities/deal-2024-q1.md

Fix: Add stage: qualified to the frontmatter.

Scripts

validate-md.py the python validation script

Required Python Packages

pyyaml - for parsing YAML frontmatter
jsonschema - for validating against JSON Schema

From the file to a first result

The download contains exactly the content displayed on this page. This copy may differ from the latest version in the source repository.

View the source and supporting files

This download contains SKILL.md only. Any scripts, references, templates and dependencies are not included. Get the required files from the source, preserving their directory structure, before continuing.

1. Download the file

Download SKILL.md

From the root of a test project, save the file as .skill-downloads/markdown-file-validation-mm8o52n2/SKILL.md, or use the command below. This folder is for inspecting the skill before installation.

Command for macOS/Linux or WSL: requires a POSIX shell and curl. On Windows without WSL, use the download button and create the folder manually.

mkdir -p '.skill-downloads/markdown-file-validation-mm8o52n2' && curl --fail --show-error --location 'https://skills-guides.com/api/skills/markdown-file-validation-mm8o52n2/download' --output '.skill-downloads/markdown-file-validation-mm8o52n2/SKILL.md.part' && mv '.skill-downloads/markdown-file-validation-mm8o52n2/SKILL.md.part' '.skill-downloads/markdown-file-validation-mm8o52n2/SKILL.md'

2. Check prerequisites

Read SKILL.md before using it. If it references scripts or external services, inspect them and prepare the required access in your test environment.

No recognized prerequisites section in this file. This does not mean it is self-contained: libraries, tools and access requirements may be mentioned elsewhere in the content or source repository.

The platforms on this page are catalog indications. The paths below follow tool documentation; they do not prove this skill has been run in those tools. No minimum tool version is confirmed for this listing.

3. Load the skill

After inspection, copy the complete folder into your project using one of the commands below, then open a new tool session. The command stops if a folder with the same name already exists: compare the files before replacing it.

Claude Code

test -f '.skill-downloads/markdown-file-validation-mm8o52n2/SKILL.md' && test -s '.skill-downloads/markdown-file-validation-mm8o52n2/SKILL.md' && mkdir -p '.claude/skills' && test ! -e '.claude/skills/validate-md' && cp -R '.skill-downloads/markdown-file-validation-mm8o52n2' '.claude/skills/validate-md'

OpenSkills

OpenSkills must already be installed. The local install/read procedure is checked with OpenSkills 1.5.0, which requires Node.js ≥ 20.6.0. Catalog slugs are not resolved automatically.

Official OpenSkills installation

openskills install './.skill-downloads/markdown-file-validation-mm8o52n2'

openskills read 'markdown-file-validation-mm8o52n2'

Reading should display the installed file content and its base directory. It does not run the skill or install its dependencies.

For an agent that reads AGENTS.md, then sync the index. This command changes AGENTS.md: review the diff before using it.

openskills sync

Manual method or another tool: attach SKILL.md to a conversation, or open it in an agent that can read files. Include any required supporting resources. No universal folder is recognized by every tool.

4. Try a first task

Use a short, synthetic input: an API endpoint, a small document or an interface brief. In a new conversation, attach the file or give the agent its path, then adapt this request:

Read .skill-downloads/markdown-file-validation-mm8o52n2/SKILL.md and apply its instructions to this example: [describe a test input]. Identify any missing files, dependencies or access. Produce the result requested by the skill without inventing data or running unreviewed scripts.

Expected result: output matching the skill instructions, or a precise list of missing prerequisites. A read confirmation alone does not validate a first use. If an external resource is unavailable, that path remains untested.

Related skills

Supabase Docs Authoring

Documentation

Write, edit, and review Supabase documentation content including guides, tutorials, reference docs, and partials. Follow style guides and MDX/TOML validation rules.

Claude CodeintermediateSafe 108,544

Skills Guide Bot