[api-extractor] typesVersions field does't work when rollup DTS

[Timeless0911]

Summary

When using dtsRollup feature, I found that it is unable to bundle types from dependency while importing from root but works for sub-path modules.

import { ClientDefinition } from 'kit/node';

export declare interface Foo extends ClientDefinition {
    bar: string;
}

export declare const foo: Foo;

export { }

Repro steps

https://github.com/Timeless0911/api-extractor-issue-typeversions

1. pnpm install
2. pnpm build

Expected result:

ClientDefinition should be bundled

declare interface ClientDefinition {
    name: string;
}

export declare interface Foo extends ClientDefinition {
    bar: string;
}

export declare const foo: Foo;

export { }

Actual result:

ClientDefinition are not be bundled

import { ClientDefinition } from 'kit/node';

export declare interface Foo extends ClientDefinition {
    bar: string;
}

export declare const foo: Foo;

export { }

Details

If I import ClientDefinition from kit instead of kit/node, it works well.

The package.json of kit is:

{
  "name": "kit",
  "version": "1.0.0",
  "types": "./dist/index.d.ts",
  "main": "./dist/index.js",
  "exports": {
    ".": {
      "types": "./dist/index.d.ts",
      "default": "./dist/index.js"
    },
    "./node": {
      "types": "./dist/node.d.ts",
      "default": "./dist/node.js"
    },
    "./package.json": {
      "default": "./package.json"
    }
  },
  "typesVersions": {
    "*": {
      "node": [
        "./dist/node.d.ts"
      ]
    }
  },
  "sideEffects": false
}

The tsconfig of this repro demo is：

{
  "compilerOptions": {
    "module": "commonjs",
    "moduleResolution": "node",
  },
  "$schema": "https://json.schemastore.org/tsconfig",
  "include": ["src"]
}

It seems api-extractor will take exports into consider, but will not read typeVersions field.

If I change tsconfig.json to set as below, it will work as expected.

{
  "compilerOptions": {
    "module": "NodeNext",
    "moduleResolution": "nodenext",
  },
  "$schema": "https://json.schemastore.org/tsconfig",
  "include": ["src"]
}

Also, if I change the import path as below, it will also work as expected.

- import { ClientDefinition } from "kit/node";
+ import { ClientDefinition } from "kit";

Standard questions

Please answer these questions to help us investigate your issue more quickly:

Question	Answer
@microsoft/api-extractor version?	7.47.11
Operating system?	Mac
API Extractor scenario?	rollups (.d.ts)
Would you consider contributing a PR?	No
TypeScript compiler version?	5.4.2
Node.js version (node -v)?	22.10.0