[@module-federation/rsbuild-plugin] Invalid ESM entrypoint

[JohnDaly]

Describe the bug

The ESM entrypoint for @module-federation/rsbuild-plugin imports a .json file without an accompanying import attribute, which causes Node.js to crash with the following error:

node:internal/modules/esm/assert:88
        throw new ERR_IMPORT_ATTRIBUTE_MISSING(url, 'type', validType);
              ^

TypeError [ERR_IMPORT_ATTRIBUTE_MISSING]: Module "file:///.../node_modules/@module-federation/rsbuild-plugin/package.json" needs an import attribute of "type: json"
    at validateAttributes (node:internal/modules/esm/assert:88:15)
    at defaultLoad (node:internal/modules/esm/load:132:3)
    at async ModuleLoader.loadAndTranslate (node:internal/modules/esm/loader:483:32) {
  code: 'ERR_IMPORT_ATTRIBUTE_MISSING'
}

I believe this was likely introduced by #4351

Reproduction

Attempt to execute a module with contents: import '@module-federation/rsbuild-plugin'; on a modern version of Node.js

Used Package Manager

npm

System Info

Node.js v22.12.0

Validations

• Read the docs.
• Read the common issues list.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Module federation issue and not a framework-specific issue.
• The provided reproduction is a minimal reproducible example of the bug.

[ScriptedAlchemy]

@cursoragent fix this

[cursor]

Summary:

• Removed the ESM JSON import by replacing package.json usage with the existing RSBUILD_PLUGIN_NAME constant, so the ESM entry no longer pulls in JSON.

Tests/Checks:

• pnpm install
• pnpm -w nx run rsbuild-plugin:lint (warn: package.json ignored by lint, target succeeded)
• pnpm -w nx run rsbuild-plugin:test failed: Vite couldn’t resolve @module-federation/enhanced / @module-federation/sdk entrypoints.
• pnpm -w nx run rsbuild-plugin:build ✅

Pushed commit to cursor/rsbuild-plugin-esm-json-c3b2.