Claude · App Store Connect

Write What's New in every language with Claude

Claude already knows what changed in this release. Ask it to turn that into What's New, translate it, and stage it for every language on your listing. MetaRun holds each one to Apple's limits and shows the before and after per language.

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Setup checked October 2026 against Claude custom connectors

01 · Uplink

Connect Claude once

01 · Add a custom connector

In Claude, open Customize, then Connectors, and choose Add custom connector. Name it MetaRun and paste the server URL:

https://metarun.dev/api/mcp

02 · Connect

Click Connect. Claude opens MetaRun in your browser to sign in; pick read-only or read and change.

03 · Team and Enterprise

An Owner adds the connector once under Organization settings, Connectors. Each member then clicks Connect and signs in to their own MetaRun account.

02 · Briefing

What Claude handles here

Release notes are the last thing anyone writes. By then the version is ready, the build is processed, and twelve languages still say last month's text. Copying translations into App Store Connect one locale at a time takes longer than writing them.

Through MetaRun, Claude writes and translates, and MetaRun does the parts that must be exact: it reads the live version, checks What's New against Apple's 4,000-character limit, stages one change per language, and reports which languages are still missing it.

03 · Preflight

Before you start

An update, not a first release: What's New only exists after the app has shipped once.
The version still editable (being prepared, ready for review, or rejected).
Something to work from: a changelog, the commit log, or your own notes.

04 · Execution

How it runs

01
Gather what changed
Claude works from what it can see: your changelog, merged pull requests, the commit log since the last tag, or what you tell it.
02
Read the version in every language
MetaRun returns the version's localizations so the agent knows which languages exist and what they say now.
03
Stage one change per language
Each language gets its own preview with the old and new text. Anything over 4,000 characters is refused at preview, not by Apple after submission.
04
Confirm coverage
Before calling the job done, Claude reads listing coverage, which lists any language still missing What's New.

05 · Session

An example session in Claude

Here's what changed in 2.4: offline sync, a new widget, faster launch. Write What's New and stage it in every language.

apple_list_version_localizationsVersion 2.4 has 12 languages. What's New is empty in each.
apple_preview_set_version_localizationPreview: English (U.S.) What's New, 412 of 4,000 characters.
Claude asks before running apple_apply_set_version_localization. You read the preview above and approve.
apple_apply_set_version_localizationApplied for English (U.S.).
apple_get_listing_coverage11 languages still missing What's New. Claude continues with those.

Illustrative: your apps, versions and numbers will differ. The tool names and their order are real.

06 · Tools

The MetaRun tools Claude calls

Tool	What it does
apple_list_version_localizationsread	Every language on the version with its current What's New, description and keywords.
apple_preview_set_version_localizationpreview + apply	Stage What's New (or description, keywords, URLs) for one language.
apple_get_listing_coverageread	Which languages are still missing which fields, so the job isn't declared done early.
apple_get_listing_editabilityread	Whether the version's text is editable right now.
aso_lint_metadataread	Checks copy against App Store rules before it's staged.
apple_preview_set_promotional_textpreview + apply	The 170-character line above the description that changes live, without review.
aso_schedule_promo_textMetaRun	Schedule promotional text to switch at a set time, for example on launch day.

Each preview has an apply twin (the same name with apply instead of preview) that only runs with the confirm token from a fresh preview, and refuses if App Store Connect changed in between. MetaRun tools save to your MetaRun workspace only (studio projects, tracked keywords), never to Apple.

07 · Apple rules

What Apple enforces, and how MetaRun handles it

No What's New on a first version

Apple has no What's New field until the app has shipped once. The API rejects it and App Store Connect hides it, so MetaRun only asks for it on updates.

4,000 characters per language

What's New and the description each allow 4,000 characters. Promotional text allows 170 and is the only one of the three that changes without review.

Text locks once the version is in review

What's New is editable while the version is being prepared or after a rejection. apple_get_listing_editability tells the agent which fields are locked and why, instead of a write failing.

Adding a language creates rows Apple fills in

When a new language is added, Apple creates that language's other localization rows on its own. MetaRun's confirm token is keyed on the language, not Apple's row id, so your approved change doesn't fail as drift.

08 · Comms

What to ask Claude

Ask Claude: Here's what changed in 2.4: offline sync, a new widget, faster launch. Write What's New and stage it in every language.
Ask Claude: Make the French release notes shorter.
Ask Claude: Is What's New filled in for every language?

09 · Safety

How Claude asks before a change

Claude asks before it calls a connector's tool unless you've set that tool to always allow. Keep MetaRun's apply tools on ask: that's the moment you see the change and decide, and it needs the confirm token from a fresh preview either way.

Apple key stays on MetaRun, encryptedPreview before every writeRecorded, revertible from history

10 · FAQ

Frequently asked questions

Who writes the translations, Claude or MetaRun?

Claude does. MetaRun reads the live listing, checks the limits, and stages one change per language for you to approve. Translations through your own agent don't use MetaRun's AI translation budget.

Can Claude update release notes after the app is live?

Not What's New: it locks with the version. Promotional text is the exception and changes the live listing immediately, so that's what to use for a post-launch message.

How many languages can it handle at once?

Every language on your listing. Each one is its own preview, so you can approve some and skip others.

Will it overwrite my description by accident?

Only fields the agent names are touched, and each preview shows the field's old and new text before anything is applied.

How do I connect Claude to App Store Connect?

In Claude, open Customize, Connectors, Add custom connector, paste https://metarun.dev/api/mcp and click Connect to sign in to MetaRun. After that, ask for "release notes" in plain words and Claude picks the MetaRun tools.

Does Claude see my App Store Connect key?

No. Your App Store Connect API key stays envelope-encrypted on MetaRun's servers and is decrypted per request. Claude holds a MetaRun token that you can revoke in Settings at any time.

More with Claude

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