├── proj_1

│   ├── hidden

│   │   └── hidden-class.mts

│   ├── index.mts

│   ├── visible-class.mts

│   └── tsconfig.json

└── proj_2

    ├── main.mts

    └── tsconfig.json

{

  "compilerOptions": {

    "rootDir": ".",

    "baseUrl": ".",

    "target": "ESNext",

    "module": "ESNext",

    "moduleResolution": "node",

    "composite": true // build proj_1 as a lib

  },

  "references": [],

  "include": ["*", "**/*"],

}

{

  "compilerOptions": {

    "rootDir": ".",

    "baseUrl": ".",

    "target": "ESNext",

    "module": "ESNext",

    "moduleResolution": "node",

    "composite": true,

    "paths": {

      // I only want to expose a single file from proj_1 to proj_2

      "~/proj_1/index.mjs": ["../proj_1/index.mjs"]

    }

  },

  "references": [

    {

      // path mapping

      "path": "../proj_1/"

    }

  ],

  "include": ["*", "**/*"],

}

// proj_1/index.mts

// Only export `VisibleClass` and other project should only import this file.

export { VisibleClass } from "./visible-class.mjs";

// proj_2/main.mts

import { VisibleClass } from "~/proj_1/index.mjs";

// This line should be error. How do I prevent this path from importing?

import { HiddenClass } from "../proj_1/hidden/hidden-class.mjs";

const v = new VisibleClass();

// This line should be error

const h = new HiddenClass();

{

  "name": "vue",

  "main": "index.js",

  "module": "dist/vue.runtime.esm-bundler.js",

  "types": "dist/vue.d.ts",

  "exports": {

    ".": {

      "import": {

        "types": "./dist/vue.d.mts",

        "node": "./index.mjs",

        "default": "./dist/vue.runtime.esm-bundler.js"

      },

      "require": {

        "types": "./dist/vue.d.ts",

        "default": "./index.js"

      }

    },

    "./server-renderer": {

      "import": {

        "types": "./server-renderer/index.d.mts",

        "default": "./server-renderer/index.mjs"

      },

      "require": {

        "types": "./server-renderer/index.d.ts",

        "default": "./server-renderer/index.js"

      }

    },

  },

  "dependencies": {

    "@vue/shared": "workspace:*"

  }

}