# Metadata Check

> >

- **Type:** Skill
- **Install:** `agentstack add skill-jdevalk-skills-metadata-check`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [jdevalk](https://agentstack.voostack.com/s/jdevalk)
- **Installs:** 0
- **Category:** [Developer Tools](https://agentstack.voostack.com/c/developer-tools)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [jdevalk](https://github.com/jdevalk)
- **Source:** https://github.com/jdevalk/skills/tree/main/metadata-check

## Install

```sh
agentstack add skill-jdevalk-skills-metadata-check
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Metadata check

Reviews short, high-value strings where every character counts — titles, meta descriptions, schema descriptions, FAQ answers, taglines, bios, and social-card copy. Flesch scoring and the ten-category readability rubric don't fit a 5–30 word string; this skill applies the checks that do.

Use this skill for anything in the metadata-string shape. For multi-paragraph prose (blog posts, READMEs, CONTRIBUTING files), use `readability-check` instead.

## What to check

For each string, check these points. Every check is either ✓ (pass), ⚠ (needs work), or ✗ (problem).

- **Front-load the distinguishing word.** The most specific, searchable term sits near the start. "Astro SEO: the definitive guide" beats "The definitive guide to Astro SEO" — the reader's eye hits the topic first.
- **Concrete over abstract.** Names, numbers, specific claims. "Reduce LCP by 40%" beats "Improve performance significantly."
- **Filler and hedging — aggressive.** Every word costs shelf space. Cut *really*, *just*, *very*, *actually*, *basically*, *simply*, *a bit*, *kind of*, *I think*. In metadata these aren't style ticks, they're wasted SERP characters.
- **Active voice unless the object is the subject.** "Audit your GitHub profile" beats "Your GitHub profile can be audited."
- **No title/description duplication.** A meta description that restates the title burns ~60 of 200 characters for nothing. The description should promise what's *inside* the page, not re-announce what it *is*.
- **Difficult words.** Prefer the common synonym unless the domain term is what the user searches for. Between *utilize* and *use*, use *use*. Domain terms the target audience expects are fine (*hydration*, *middleware*, *structured data*).
- **SERP and platform truncation.** Know the limit for the surface:
  - Google SERP: titles clipped around 55–65 characters, descriptions around 155–160.
  - GitHub repo description: ~350 chars, but only the first ~100 show in search results and on profile cards.
  - Twitter/X bio: 160 chars.
  - Open Graph description: usually shown at ~200 chars.
  Anything past the cut should be disposable, not a key promise.
- **One idea per field.** Titles and descriptions that try to promise two things land fuzzy. Pick the sharpest one.

## What to skip

Don't run this skill on:

- URLs, schema `@id` values, filenames, enum values, or any technical identifier.
- Multi-paragraph prose — route that to `readability-check`.
- Strings the user did not write and cannot change (imported content, upstream defaults).

## Output format

Per string, return:

```markdown
### [Field name] — [length] chars

> [The string itself]

- Front-loading: [✓/⚠/✗] [one-line reason if not ✓]
- Concreteness: [✓/⚠/✗] [reason]
- Filler: [✓/⚠/✗] [reason]
- Active voice: [✓/⚠/✗] [reason]
- Duplication: [✓/⚠/✗] [reason]
- Word choice: [✓/⚠/✗] [reason]
- Truncation fit: [✓/⚠/✗] [reason] — platform: [SERP/GitHub/Twitter/OG]
- One idea: [✓/⚠/✗] [reason]

**Rewrite:** [only if any check failed — a concrete replacement string, not a suggestion]
```

Keep the audit tight — metadata feedback should be actionable in seconds, and you're almost always running it across a batch of strings at once. If a string is already clean, don't pad the output; just mark all ✓ and move on.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [jdevalk](https://github.com/jdevalk)
- **Source:** [jdevalk/skills](https://github.com/jdevalk/skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-jdevalk-skills-metadata-check
- Seller: https://agentstack.voostack.com/s/jdevalk
- Browse the marketplace: https://agentstack.voostack.com/browse

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