The SandyboxSmall tools. Specific problems.

SHOPIFY · OCTOBER 1, 2026

One stale extension can block your entire app update.

Shopify says app updates are blocked after October 1 if any extension is still on API 2025-07 or earlier. If you discover that during an urgent release, the extension migration becomes the release blocker.

Oct 1app-update gate
2025-07last React-based UI version
$5.99planned upgrade pack
shopify.extension.toml
api_version = "2025-07"

[[extensions]]
type = "ui_extension"
APP UPDATE BLOCKED AFTER OCT 1
THE FAILURE MODEThe app can be healthy and still fail the release gate.

One extension API version can hold the entire app update.

urgent fixes ↗checkout extensions ↗customer accounts ↗React migration ↗release QA ↗

WHAT THE DEADLINE CHANGES

The risk is not only old UI code. It is losing the ability to ship the whole app.

01

A stale extension remains

One config can stay on 2025-07 while the rest of the app moves forward.

02

The next update is blocked

Shopify says the CLI blocks updates when any extension is more than one year old.

03

The upgrade can expand

Moving beyond 2025-07 can require replacing legacy React extension UI with Polaris web components and retesting behavior.

FREE RELEASE-GATE CHECK

Paste your extension config. Find the one stale target that can block the whole app.

Paste one or more shopify.extension.toml files. Add related extension code if you want a rough migration-surface check too. Nothing is uploaded for analysis beyond the event metadata.

PASTE CONFIG / CODE

PLANNED $5.99 UPGRADE PACK

Do not discover the migration scope when production needs a hotfix.

The pack is designed to turn the repo scan into a release plan: exactly which extensions are stale, what likely needs component/API migration, what to regression-test, and what must pass before the next app deploy.

SOURCE OF TRUTH

The release block comes directly from Shopify.

Shopify — October 1 update restriction ↗Shopify — checkout UI migration guide ↗