vue-query: `queryOptions()`'s real return type is unexported; the public name with the same identifier points at a different, legacy type

Describe the bug

Since the 5.98.0 rewrite ("fix(vue-query): fix type of queryOptions to allow plain properties or getters"), queryOptions() is typed against a new QueryOptions-based shape. In the published rollup declaration file (build/modern/_tsup-dts-rollup.d.ts) this shape exists as UndefinedInitialQueryOptions_alias_1 / DefinedInitialQueryOptions_alias_1 — but:

• _alias_1 is not exported from the package root (build/modern/index.d.ts).
• The public names UndefinedInitialQueryOptions / DefinedInitialQueryOptions are re-exported from the root, but they still point at the old, UseQueryOptions-based, MaybeRef<...>-union type. Two genuinely different types share one exported name; only the wrong one is reachable.
• Supporting types referenced by the new signature are unexported too: vue-query's ShallowOption, its local MaybeRefOrGetter alias, and query-core's QueryBehavior, RetryValue, RetryDelayValue, plus a non-exported unique symbol (dataTagErrorSymbol).

Any library that exports a function returning queryOptions(...) with an inferred return type — the exact pattern @kubb/plugin-vue-query generates for every endpoint — hits one of two consequences when its declarations are emitted:

1. Hard declaration-emit errors (TS2527/TS2883) — reproduced here with both tsdown/rolldown-plugin-dts and plain tsc.
2. Silently WRONG declarations — the natural fix for (1) is to annotate the return type with the public UndefinedInitialQueryOptions. That compiles with zero errors, but it is the wrong type: a consumer spreading the factory's result into another queryOptions() call to add select fails to type-check, and the DataTag on queryKey is lost.

Both are reproduced below, from the same root cause: the name collision.

Your minimal, reproducible example

https://github.com/DesselBane/repro-vue-query-query-options

Steps to reproduce

See repo README.md

Expected behavior

No TS2527 error and/or correct type exported so that downstream select works

How often does this bug happen?

Every time

Screenshots or Videos

No response

Platform

Package	Version
@tanstack/vue-query	5.101.2 (also confirmed broken at 5.98.0; 5.97.0 is clean — see Regression window)
@tanstack/query-core	5.101.2 (transitive)
typescript	6.0.3
vue	3.5.31
tsdown	0.21.4 (rolldown-plugin-dts@0.22.5, rolldown@1.0.0-rc.9)
Node	v24.0.0
OS	Windows 11

Tanstack Query adapter

vue-query

TanStack Query version

5.98.0 (and 5.101.2)

TypeScript version

6.0.3

Additional context

Diagnosis and reproduction were created with the help of CLAUDE. I checked the repo and as far as I can tell this is all correct.

Start with the published declarations in build/modern/_tsup-dts-rollup.d.ts and the exports in build/modern/index.d.ts, then read the queryOptions implementation and the repro repository's README.md. Run the listed tsdown and tsc reproductions; done means declarations emit without TS2527/TS2883 and downstream select composition preserves the correct query options and DataTag types.