What is appstore-subscription-localizer?

A tool for translating the names and descriptions shown for App Store subscriptions and in-app purchases into different languages using App Store Connect.

Use it to create or update localized display names and descriptions for subscription groups, subscriptions, and in-app purchases.

It keeps subscription and purchase text localized without changing unrelated app listing information, prices, or availability.

appstore-subscription-localizer — Skill for Claude Code and Codex by X

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-subscription-localizer

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-subscription-localizer/github.svg)](https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-subscription-localizer)

Your own site

<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-subscription-localizer"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-subscription-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/xopoko/build-swift-apps/appstore-subscription-localizer"><img src="https://agentmods.dev/badge/skills/xopoko/build-swift-apps/appstore-subscription-localizer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 456 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.

Model	Per session	Once invoked
Fable 5.1	$0.00048	$0.00456
Opus 5	$0.00024	$0.00228
Sonnet 5	$0.00010	$0.00091
Haiku 4.5	$0.00005	$0.00046

Measured 10d ago against content hash d548819c9f52, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

appstore-subscription-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 10d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/subscription_localization_plan.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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-subscription-localizer/SKILL.md · 42 lines

What it actually says

App Store Subscription Localizer

Use for subscription/IAP display names and descriptions, not general App Store metadata (appstore-metadata-localizer owns that).

Use appstore-pricing-planner for price points, availability, or schedules. Use appstore-revenuecat-sync when the work also maps ASC products to RevenueCat offerings or entitlements.

Preconditions

asc auth login or ASC_* env vars.
APP_ID, group/subscription/IAP IDs resolved.
Products already exist.

Command Plan Helper

For a deterministic command plan, run the helper from the plugin root:

python3 "$PLUGIN_ROOT/skills/appstore-subscription-localizer/scripts/subscription_localization_plan.py" \
  --app "APP_ID" --group-id "GROUP_ID" --subscription-id "SUB_ID" --iap-id "IAP_ID" \
  --locale "en-US,fr-FR" --name "Display Name"

The helper prints commands only; it does not call ASC or change localizations. Create/update commands require --confirming-actions. Pass --json for machine-readable output.

Workflow

Resolve APP_ID, group IDs, subscription IDs, IAP IDs, and existing localization IDs before mutation.
List existing localizations before creating anything; duplicate locale creates fail.
Skip locales that already exist unless the user asked to update.
If the user gives one display name, use it for all locales; if they provide per-locale names, honor them.
Pass --description only when supplied, usually for IAP localizations.
Process many products sequentially by group for readable output, record per-locale failures, and verify with the matching list command after the batch.

References

references/appstore-subscription-localizer.md for supported locales and detailed resolve, list, create, update, and batch rules.

Files

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.

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.

10d ago First seen · 42 lines · 48 tokens per session scan A d548819c9f52

Subscribe to this mod's changes

appstore-subscription-localizer is a skill published in the GitHub repository Xopoko/build-swift-apps (45 stars, last pushed 13d ago), licensed MIT. It adds 48 tokens to every session and 456 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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