feat(clerk-js,localizations,shared,ui): Add support for promo codes at checkout

[dstaley]

Description

This PR adds support for applying/removing promo codes from checkout.

Checklist

• pnpm test runs as expected.
• pnpm build runs as expected.
• (If applicable) JSDoc comments have been added or updated for any package exports
• (If applicable) Documentation has been updated

Type of change

• 🐛 Bug fix
• 🌟 New feature
• 🔨 Breaking change
• 📖 Refactoring / dependency upgrade / documentation
• other:

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[changeset-bot]

🦋 Changeset detected

Latest commit: 387444c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 23 packages

Name	Type
@clerk/localizations	Minor
@clerk/clerk-js	Minor
@clerk/shared	Minor
@clerk/ui	Minor
@clerk/react	Patch
@clerk/chrome-extension	Patch
@clerk/electron	Patch
@clerk/expo	Patch
@clerk/astro	Patch
@clerk/backend	Patch
@clerk/expo-passkeys	Patch
@clerk/express	Patch
@clerk/fastify	Patch
@clerk/headless	Patch
@clerk/hono	Patch
@clerk/msw	Patch
@clerk/nextjs	Patch
@clerk/nuxt	Patch
@clerk/react-router	Patch
@clerk/tanstack-react-start	Patch
@clerk/testing	Patch
@clerk/vue	Patch
@clerk/swingset	Patch

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Project	Deployment	Actions	Updated (UTC)
clerk-js-sandbox	Ready	Preview	Aug 5, 2026 5:04pm
swingset	Ready	Preview	Aug 5, 2026 5:04pm

[pkg-pr-new]

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@clerk/astro

npm i https://pkg.pr.new/@clerk/astro@9317

@clerk/backend

npm i https://pkg.pr.new/@clerk/backend@9317

@clerk/chrome-extension

npm i https://pkg.pr.new/@clerk/chrome-extension@9317

@clerk/clerk-js

npm i https://pkg.pr.new/@clerk/clerk-js@9317

@clerk/electron

npm i https://pkg.pr.new/@clerk/electron@9317

@clerk/electron-passkeys

npm i https://pkg.pr.new/@clerk/electron-passkeys@9317

@clerk/eslint-plugin

npm i https://pkg.pr.new/@clerk/eslint-plugin@9317

@clerk/expo

npm i https://pkg.pr.new/@clerk/expo@9317

@clerk/expo-google-signin

npm i https://pkg.pr.new/@clerk/expo-google-signin@9317

@clerk/expo-passkeys

npm i https://pkg.pr.new/@clerk/expo-passkeys@9317

@clerk/express

npm i https://pkg.pr.new/@clerk/express@9317

@clerk/fastify

npm i https://pkg.pr.new/@clerk/fastify@9317

@clerk/hono

npm i https://pkg.pr.new/@clerk/hono@9317

@clerk/localizations

npm i https://pkg.pr.new/@clerk/localizations@9317

@clerk/nextjs

npm i https://pkg.pr.new/@clerk/nextjs@9317

@clerk/nuxt

npm i https://pkg.pr.new/@clerk/nuxt@9317

@clerk/react

npm i https://pkg.pr.new/@clerk/react@9317

@clerk/react-router

npm i https://pkg.pr.new/@clerk/react-router@9317

@clerk/shared

npm i https://pkg.pr.new/@clerk/shared@9317

@clerk/tanstack-react-start

npm i https://pkg.pr.new/@clerk/tanstack-react-start@9317

@clerk/testing

npm i https://pkg.pr.new/@clerk/testing@9317

@clerk/ui

npm i https://pkg.pr.new/@clerk/ui@9317

@clerk/upgrade

npm i https://pkg.pr.new/@clerk/upgrade@9317

@clerk/vue

npm i https://pkg.pr.new/@clerk/vue@9317

commit: 387444c

[github-actions]

API Changes Report

Generated by Break Check on 2026-08-05T17:08:35.386Z

Summary

Metric	Count
Packages analyzed	19
Packages with changes	1
🔴 Breaking changes	0
🟡 Non-breaking changes	1
🟢 Additions	2

🤖 This report was reviewed by claude-sonnet-4-6.

---

@clerk/shared

Current version: 4.26.0
Recommended bump: MINOR → 4.27.0

Subpath ./types

🟡 Non-breaking Changes (1)

Modified: __internal_LocalizationResource

// ... 222 unchanged lines elided ...
        };
      };
      checkout: {
+       addPromoCode: LocalizationValue;
+       applyPromoCode: LocalizationValue;
+       discount: LocalizationValue;
+       promoCodePlaceholder: LocalizationValue;
+       removePromoCode: LocalizationValue;
        title: LocalizationValue;
        title__paymentSuccessful: LocalizationValue;
        title__subscriptionSuccessful: LocalizationValue;
// ... 1843 unchanged lines elided ...

Static analyzer: Breaking change in type alias __internal_LocalizationResource: Type changed: {locale:string;maintenanceMode:import("@clerk/shared").LocalizationValue;roles:{[r:string]:import("@clerk/shared").Loca… → {locale:string;maintenanceMode:import("@clerk/shared").LocalizationValue;roles:{[r:string]:import("@clerk/shared").Loca…

🤖 AI review (reclassified as non-breaking) (72%): The before and after snippets are structurally identical at the visible boundaries; the only difference is '1991 lines elided' vs '1996 lines elided', indicating ~5 new fields were added. __internal_LocalizationResource is used only as the source type for LocalizationResource which extends DeepPartial<DeepLocalizationWithoutObjects<__internal_LocalizationResource>>, making the resolved consumer-facing type a deeply partial (all-optional) version — so consumers reading LocalizationResource are never required to supply the new fields, and adding optional output fields is non-breaking.

🟢 Additions (2)

Added: BillingNamespace.updateCheckout

+ updateCheckout: (params: UpdateCheckoutParams) => Promise<BillingCheckoutResource>;

Added property BillingNamespace.updateCheckout

Added: UpdateCheckoutParams

+ type UpdateCheckoutParams = WithOptionalOrgType<{
+   id: string;
+   promoCode: string;
+ }>;

Added type alias UpdateCheckoutParams

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Report generated by Break Check

_{Last ran on 387444c.}