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 Xopoko/build-swift-apps --skill appstore-metadata-localizergit clone --depth 1 https://github.com/Xopoko/build-swift-appsWrote 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/xopoko/build-swift-apps/appstore-metadata-localizer)<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-metadata-localizer"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-metadata-localizer/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/xopoko/build-swift-apps/appstore-metadata-localizer"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-metadata-localizer.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 | $0.00052 | $0.00483 |
| Opus 5 | $0.00026 | $0.00242 |
| Sonnet 5 | $0.00010 | $0.00097 |
| Haiku 4.5 | $0.00005 | $0.00048 |
Grade A, and why
appstore-metadata-localizer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
App Store Metadata Localizer
Pull source metadata, translate/adapt it, validate limits, get approval, then upload version or app-info localizations.
Use appstore-metadata-sync for canonical JSON field edits that are not translation-first. Use appstore-release-notes-writer when the requested artifact is only What's New or promotional text. Use appstore-subscription-localizer for subscription, group, or IAP display names.
Local Lint Helper
After writing or editing localized .strings or metadata JSON, run the bundled limit checker:
python3 "$PLUGIN_ROOT/skills/appstore-metadata-localizer/scripts/metadata_localization_lint.py" \
"./localizations" "./app-info-localizations" --recursive
The helper checks App Store field limits for name, subtitle, keywords, description, whatsNew, and promotionalText. It does not translate, rewrite files, upload, or call ASC. Pass --json for machine-readable output.
Workflow
- Confirm current
asc localizationsflags, then resolve app, version, and app-info IDs deterministically. - Download source and existing localizations; if download is unavailable, inspect with
asc localizations list. - Translate one target locale at a time from the source locale. Preserve formatting and meaning; do not translate from memory.
- Adapt keywords for native App Store search behavior instead of literal translation.
- Run
metadata_localization_lint.py, then show a field-by-locale summary table and wait for approval. - Upload only after approval, then verify with the matching
asc localizations listcommand.
Translation Rules
Use formal, professional App Store register. Keep the app name unchanged unless the user explicitly asks to translate it. For updates, download current localization, show a diff, get approval, then upload.
References
references/appstore-metadata-localizer.mdfor supported locales, detailed ASC commands, field scope,.stringsformat, and translation rules.
What ships with it
3 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.
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.
- 11d ago First seen · 39 lines · 52 tokens per session scan A 3833bd2714d7
appstore-metadata-localizer is a skill published in the GitHub repository Xopoko/build-swift-apps (45 stars, last pushed 14d ago), licensed MIT. It adds 52 tokens to every session and 483 once invoked, about $0.0003 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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