Summary

Two source-level type fixes for consumers with skipLibCheck: false:

1. Remove zod/v4/core re-export from src/index.ts

The line export type * from "zod/v4/core" overlaps with export type * from "zod/v4" and leaks internal Zod types into the public API namespace. This causes TS2742 ("cannot be named without a reference to zod/v4/core") for consumers. The line already has @ts-expect-error above it, confirming it was known to be problematic.

Related: #5574, #4837

2. Fix access control [key][number] indexing in admin and organization plugins

The emitted .d.ts for permission types uses S[key][number] double-indexing, but TypeScript cannot narrow the intermediate [key] access to readonly unknown[] after the conditional check. This produces type errors in the emitted declarations for both admin and organization plugin client types.

Fix: introduce an ArrayElement<T> helper type (T extends readonly (infer E)[] ? E : never) and use ArrayElement<S[key]> instead of S[key][number] in 4 locations (admin/client.ts, admin/routes.ts, organization/client.ts, organization/organization.ts).

Related: #4804, #6491, #6127

Impact

• Runtime: Zero — types only, no behavioral changes
• Build: pnpm typecheck, pnpm lint, pnpm build all pass
• Consumers: Fixes TS2742 and access control type errors for projects using skipLibCheck: false

Verification

• pnpm typecheck — zero errors
• pnpm lint (Biome, 1386 files) — no issues
• pnpm build (tsdown, 673 output files) — clean in ~1100ms

Summary by cubic

Fix TypeScript declaration issues by removing the zod/v4/core type re-export and using a new ArrayElement helper for permission arrays. This resolves TS2742 and permission type errors for projects using skipLibCheck: false.

• Bug Fixes
  • Removed export type * from "zod/v4/core" to prevent internal Zod types leaking and “cannot be named” errors.
  • Added ArrayElement helper in access/types and used it in admin and organization permission types (replacing S[key][number]) to fix emitted d.ts.

^{Written for commit e0036d5. Summary will update on new commits.}