happytails.ai

Markdown Frontmatter Validator

Open Markdown Frontmatter Validator on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "markdown-frontmatter-validator",
  "category": "text-tools",
  "built": true,
  "requirements": "Input is limited to 200000 characters. Results are computed locally and exported as JSON.",
  "implementation": {
    "fields": [],
    "inputMaxLength": 200000,
    "inputErrorCode": "STRUCTURED_TEXT_TOO_LONG",
    "registrationFamily": "markdown-frontmatter-validator",
    "note": "Check required Markdown frontmatter fields locally. The validator uses an explicit bounded schema.",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 200000,
      "inputMode": "text",
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Up to 200,000 characters. Review the settings before running.",
      "helpParts": [
        "Up to 200,000 characters.",
        "Review the settings before running."
      ],
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}

Page guide

Check required Markdown frontmatter fields against a small explicit schema. Runs locally and returns a reviewable report.

How to use Markdown Frontmatter Validator
  1. Paste the Markdown document.
  2. Run the local check.
  3. Review missing fields and download the report.

Input is limited to 200000 characters. Results are computed locally and exported as JSON.

Explicit fields only

The default schema checks title and description. Nested YAML and custom schemas are not inferred.