appstore-aso-auditor

appstore-aso-auditor is a skill for Claude Code, Codex from Xopoko/build-swift-apps. It costs 40 tokens per session (733 once invoked), scanned A, original, MIT.

An offline checker for App Store search and listing text. App Store optimization (ASO) means improving an app's store page so people can find and understand it.

In plain words
What is it for?
Use it to review canonical App Store metadata, including names, subtitles, keywords, descriptions, update text, and locale-specific keyword gaps.
Why use it?
It finds missing or weak fields, wasted keywords, and formatting problems before you publish changes.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the build-swift-apps plugin — 61 skills, 3 commands, 3 MCP servers shipped together

Good fit Use it to review canonical App Store metadata, including names, subtitles, keywords, descriptions, update text, and locale-specific keyword gaps.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/xopoko/build-swift-apps/appstore-aso-auditor
Install

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.

Any agent
npx skills add Xopoko/build-swift-apps --skill appstore-aso-auditor
Clone the repo
git clone --depth 1 https://github.com/Xopoko/build-swift-apps

Made for: Claude Code, Codex.

Or install build-swift-apps, the plugin that ships this one along with the rest of its 61 skills, 3 commands, 3 MCP servers.

Wrote 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.

agentmods badge for appstore-aso-auditor

README.md
[![agentmods](https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-aso-auditor/github.svg)](https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-aso-auditor)
Your own site
<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-aso-auditor"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-aso-auditor/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.

agentmods 80×15 button for appstore-aso-auditor

Your own site · 80×15
<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-aso-auditor"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-aso-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 733 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00040 $0.00733
Opus 5 $0.00020 $0.00367
Sonnet 5 $0.00008 $0.00147
Haiku 4.5 $0.00004 $0.00073

Measured 12d ago against content hash 8ce99793f596, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

appstore-aso-auditor 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 12d 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.

skills/appstore-aso-auditor/SKILL.md · 82 lines

How it starts

The opening of the file, as written. The whole thing — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.

App Store ASO Auditor

Audit the latest local metadata version first; Astro keyword gaps and Apple-generated tags are additive signals.

Preconditions

  • Canonical metadata from asc metadata pull --app "APP_ID" --version "1.2.3" --dir "./metadata".
  • Normalize asc migrate export or asc localizations download output before auditing.
  • Read references/aso_rules.md for rule details.
  • Use highest semantic version under metadata/version/.
  • Primary locale is en-US unless the user specifies another.

Paths:

  • App-info fields: metadata/app-info/{locale}.json
  • Version fields: metadata/version/{latest-version}/{locale}.json
  • App name may be absent; fetch with asc apps info list or ask before flagging it.

Offline Checks

  1. Keyword waste: tokens in subtitle or name also present in keywords. For Arabic also compare variants without ال; for CJK split by punctuation/character groups.
  2. Underused fields: keywords below 90/100 or subtitle below 20/30 chars.
  3. Missing fields: empty subtitle, keywords, description, whatsNew; only flag name if present and empty.
  4. Bad keyword separators: spaces after commas, semicolons, or pipes.
  5. Cross-locale gaps: non-primary locale keywords identical to the primary locale.
  6. Description coverage: keywords absent from description as conversion evidence, not Apple indexing evidence. Ignore Latin keywords in non-Latin descriptions when they target separate search paths.

Optional app tags:

asc app-tags list --app "APP_ID" --output json
asc app-tags view --app "APP_ID" --id "TAG_ID" --output json

Use tags only as classification evidence. Do not promise metadata changes will immediately alter Apple-generated tags.

Astro Keyword Gaps

If Astro MCP is connected and the app is tracked:

  • call get_app_keywords;
  • add per-store tracking with add_keywords for locales/territories before querying non-US stores;
  • run extract_competitors_keywords for 3-5 competitor app IDs;
  • call get_keyword_suggestions and search_rankings;
  • diff suggestions against title, subtitle, and keywords;
  • rank gaps by popularity and note source.

Read the full file on GitHub · 82 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 12d ago First seen · 82 lines · 40 tokens per session scan A 8ce99793f596

Subscribe to this mod's changes

appstore-aso-auditor is a skill published in the GitHub repository Xopoko/build-swift-apps (45 stars, last pushed 14d ago), licensed MIT. It adds 40 tokens to every session and 733 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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