check-meta

Business

Analyze and validate meta tags on web pages. Use when users ask to check meta tags, verify SEO tags, audit page titles, check Open Graph tags, verify canonical URLs, or analyze social sharing tags. Detects missing title, description issues, duplicate tags, and Open Graph problems.

QUICK START

How to use this skill

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Prompt to paste

I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/data/check-meta/SKILL.md

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Check Meta

Analyze and validate meta tags on web pages for SEO and social sharing.

Quick Start

cd /path/to/html-checker/scripts
bun src/check-meta.ts <URL>

CLI Options

Option	Short	Default	Description
`--verbose`	`-v`	false	Show all meta tags found
`--json`	`-j`	false	Output results as JSON

Checks Performed

Check	Severity	Description
Missing title	Error	Page has no title tag
Title too short	Warning	Title under 30 characters
Title too long	Warning	Title over 60 characters
Missing description	Error	No meta description
Description too short	Warning	Description under 50 characters
Description too long	Warning	Description over 160 characters
Missing canonical	Warning	No canonical URL specified
Missing og:title	Info	No Open Graph title
Missing og:description	Info	No Open Graph description
Missing og:image	Info	No Open Graph image
Missing twitter:card	Info	No Twitter card meta
Duplicate meta	Warning	Same meta tag appears twice

Usage Examples

# Basic check
bun src/check-meta.ts https://example.com

# Verbose output
bun src/check-meta.ts https://example.com --verbose

# JSON output
bun src/check-meta.ts https://example.com --json

Output Example

Meta Analysis for https://example.com

Title: "Example Domain" (14 chars)
Description: "This domain is for use in illustrative examples..." (156 chars)

SEO Tags:
  [OK] title: Example Domain
  [OK] description: This domain is for...
  [MISSING] canonical

Open Graph:
  [MISSING] og:title
  [MISSING] og:description
  [MISSING] og:image

Twitter:
  [MISSING] twitter:card
  [MISSING] twitter:title

Issues Found: 5
  [WARNING] Title too short (14 chars, min 30)
  [WARNING] Missing canonical URL
  [INFO   ] Missing og:title
  [INFO   ] Missing og:image
  [INFO   ] Missing twitter:card

Recommendations:
  - Expand title to 30-60 characters
  - Add canonical URL to prevent duplicate content
  - Add Open Graph tags for social sharing

SEO Best Practices

Title: 30-60 characters, include primary keyword
Description: 50-160 characters, compelling call-to-action
Canonical: Always specify to prevent duplicate content
Open Graph: Essential for social media sharing

Related Files

Command: plugins/html-checker/commands/check-meta.md
Scripts: plugins/html-checker/scripts/src/check-meta.ts
Check Headings: plugins/html-checker/skills/check-headings/
Check Performance: plugins/html-checker/skills/check-performance/