# Fixing Metadata

> Ship correct, complete metadata.

- Skill: `elophanto/fixing-metadata` (Agent Skill)
- Install (CLI): `npx skillmds@latest add elophanto/fixing-metadata`
- Raw SKILL.md: https://api.skillmd.com/api/skills/elophanto/fixing-metadata/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: elophanto (https://skillmd.com/u/elophanto)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/elophanto/fixing-metadata

---


# fixing-metadata

Ship correct, complete metadata.


## Triggers

- metadata
- meta tags
- og tags
- open graph
- seo
- title tag
- description tag
- social preview
- twitter card
- favicon
- structured data
- schema.org

## how to use

- `/fixing-metadata`
  Apply these constraints to any metadata work in this conversation.

- `/fixing-metadata <file>`
  Review the file against all rules below and report:
  - violations (quote the exact line or snippet)
  - why it matters (one short sentence)
  - a concrete fix (code-level suggestion)

Do not introduce new frameworks or SEO libraries unless explicitly requested. Prefer minimal diffs.

## when to apply

Reference these guidelines when:
- adding or changing page titles, descriptions, canonical, robots
- implementing Open Graph or Twitter card metadata
- setting favicons, app icons, manifest, theme-color
- building shared SEO components or layout metadata defaults
- adding structured data (JSON-LD)
- changing locale, alternate languages, or canonical routing
- shipping new pages, marketing pages, or shareable links

## rule categories by priority

| priority | category | impact |
|----------|----------|--------|
| 1 | correctness and duplication | critical |
| 2 | title and description | high |
| 3 | canonical and indexing | high |
| 4 | social cards | high |
| 5 | icons and manifest | medium |
| 6 | structured data | medium |
| 7 | locale and alternates | low-medium |
| 8 | tool boundaries | critical |

## quick reference

### 1. correctness and duplication (critical)

- define metadata in one place per page, avoid competing systems
- do not emit duplicate title, description, canonical, or robots tags
- metadata must be deterministic, no random or unstable values
- escape and sanitize any user-generated or dynamic strings
- every page must have safe defaults for title and description

### 2. title and description (high)

- every page must have a title
- use a consistent title format across the site
- keep titles short and readable, avoid stuffing
- shareable or searchable pages should have a meta description
- descriptions must be plain text, no markdown or quote spam

### 3. canonical and indexing (high)

- canonical must point to the preferred URL for the page
- use noindex only for private, duplicate, or non-public pages
- robots meta must match actual access intent
- previews or staging pages should be noindex by default when possible
- paginated pages must have correct canonical behavior

### 4. social cards (high)

- shareable pages must set Open Graph title, description, and image
- Open Graph and Twitter images must use absolute URLs
- prefer correct image dimensions and stable aspect ratios
- og:url must match the canonical URL
- use a sensible og:type, usually website or article
- set twitter:card appropriately, summary_large_image by default

### 5. icons and manifest (medium)

- include at least one favicon that works across browsers
- include apple-touch-icon when relevant
- manifest must be valid and referenced when used
- set theme-color intentionally to avoid mismatched UI chrome
- icon paths should be stable and cacheable

### 6. structured data (medium)

- do not add JSON-LD unless it clearly maps to real page content
- JSON-LD must be valid and reflect what is actually rendered
- do not invent ratings, reviews, prices, or organization details
- prefer one structured data block per page unless required

### 7. locale and alternates (low-medium)

- set the html lang attribute correctly
- set og:locale when localization exists
- add hreflang alternates only when pages truly exist
- localized pages must canonicalize correctly per locale

### 8. tool boundaries (critical)

- prefer minimal changes, do not refactor unrelated code
- do not migrate frameworks or SEO libraries unless requested
- follow the project’s existing metadata pattern (Next.js metadata API, react-helmet, manual head, etc.)

## review guidance

- fix critical issues first (duplicates, canonical, indexing)
- ensure title, description, canonical, and og:url agree
- verify social cards on a real URL, not localhost
- prefer stable, boring metadata over clever or dynamic
- keep diffs minimal and scoped to metadata only

## Verify

- Title, description, OG image, canonical URL, and favicon were each inspected on the live page (view-source or DOM), not just edited in source
- Title length is within the 50-60 char window and description within 140-160 chars; final counts are recorded
- OG and Twitter card previews were validated with a real fetcher (e.g., opengraph.xyz, cards-dev) and screenshots/links attached
- Structured data (JSON-LD) validates against schema.org; the validator output or zero-error report is attached
- Sitemap and robots directives were checked so the page is actually indexable (or intentionally noindex)