Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add rshankras/claude-code-apple-skills --skill app-description-writergit clone --depth 1 https://github.com/rshankras/claude-code-apple-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/rshankras/claude-code-apple-skills/app-description-writer)<a href="https://agentmods.dev/skills/rshankras/claude-code-apple-skills/app-description-writer"><img src="https://agentmods.dev/badge/skills/rshankras/claude-code-apple-skills/app-description-writer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/rshankras/claude-code-apple-skills/app-description-writer"><img src="https://agentmods.dev/badge/skills/rshankras/claude-code-apple-skills/app-description-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00038 | $0.01220 |
| Opus 5 | $0.00019 | $0.00610 |
| Sonnet 5 | $0.00008 | $0.00244 |
| Haiku 4.5 | $0.00004 | $0.00122 |
Grade A, and why
app-description-writer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 239 lines — stays where its author put it; the contents beside it link to each section on GitHub.
App Description Writer
Generate compelling App Store descriptions that convert browsers into users.
When This Skill Activates
- User needs to write initial App Store description
- User wants to improve existing description
- User is preparing for a major update
- User asks about promotional text or What's New
Information Gathering
Before writing, ask about:
-
App Basics
- What does the app do? (one sentence)
- Who is it for? (target audience)
- What problem does it solve?
-
Key Features
- Top 3-5 features
- What makes it unique vs competitors?
- Any awards or recognition?
-
Social Proof
- Number of users/downloads (if impressive)
- Notable reviews or press mentions
- Any partnerships or integrations?
-
Tone
- Professional / Casual / Fun / Technical?
- Brand voice keywords?
Output Format
Generate all three text types:
1. Promotional Text (170 characters)
- First thing users see
- Should create curiosity or urgency
- Can be updated without app review
- Good for seasonal/sale messaging
2. Full Description (4000 characters max)
Structure:
[Opening Hook - 1-2 sentences, problem/benefit focused]
[Key Features with emoji bullets]
• Feature 1 - benefit
• Feature 2 - benefit
• Feature 3 - benefit
[Social Proof paragraph - optional]
[How it works - brief explanation]
[Call to action]
[Support/contact info]
3. What's New (4000 characters)
For updates:
[Version X.X highlights]
NEW
• Feature addition
IMPROVED
• Enhancement
FIXED
• Bug fix
Thank you for your feedback!
Best Practices
Do's
- Lead with the biggest benefit
- Use short paragraphs (2-3 lines max)
- Include relevant keywords naturally
- Use emojis sparingly for scannability
- End with clear call-to-action
- Mention if there's a free trial/tier
Don'ts
- Don't start with "Welcome to..."
- Don't use ALL CAPS excessively
- Don't include URLs (they're not clickable)
Examples
Promotional Text Examples
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 239 lines · 38 tokens per session scan A f91ea0e19c40
app-description-writer is a skill published in the GitHub repository rshankras/claude-code-apple-skills (713 stars, last pushed 1mo ago), licensed MIT. It adds 38 tokens to every session and 1,220 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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