Extract and own the webpack RSC plugin as TypeScript source

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 All notable changes to this package will be documented in this file.
 
+## [Unreleased]
+
+### Changed
+- Ported the webpack RSC plugin from the vendored built JavaScript artifact (`src/react-server-dom-webpack/cjs/react-server-dom-webpack-plugin.js`) to first-class TypeScript source at `src/webpack/RSCWebpackPlugin.ts`, preserving full behavior parity (server manifest emission, CSS/JS chunk scanning, runtime-chunk filtering, dependency-type chunk-group manifest construction with eager-import fallback, duplicate-package runtime detection, and hot-update CSS exclusion). The `./WebpackPlugin`, `./WebpackLoader`, and `./RSCReferenceDiscoveryPlugin` exports are unchanged; the vendored plugin file remains in the package but is no longer used by any export path. ([#87])
+
 ## [19.0.5-rc.7] - 2026-06-09
 
 ### Added
@@ -80,3 +85,4 @@ All notable changes to this package will be documented in this file.
 [19.0.5-rc.1]: https://github.com/shakacode/react_on_rails_rsc/releases/tag/19.0.5-rc.1
 
 [#52]: https://github.com/shakacode/react_on_rails_rsc/pull/52
+[#87]: https://github.com/shakacode/react_on_rails_rsc/pull/87

package.json

@@ -82,7 +82,7 @@
     "prepublishOnly": "yarn run build",
     "release": "bash scripts/release.sh",
     "release:dry-run": "bash scripts/release.sh --dry-run",
-    "build-if-needed": "test -f dist/client.browser.js -a -f dist/client.node.js -a -f dist/server.node.js -a -f dist/RSCReferenceDiscoveryPlugin.js -a -f dist/RSCReferenceDiscoveryPlugin.d.ts -a -f dist/react-server-dom-rspack/plugin.js -a -f dist/react-server-dom-rspack/loader.js || (yarn run build && test -f dist/client.browser.js -a -f dist/client.node.js -a -f dist/server.node.js -a -f dist/RSCReferenceDiscoveryPlugin.js -a -f dist/RSCReferenceDiscoveryPlugin.d.ts -a -f dist/react-server-dom-rspack/plugin.js -a -f dist/react-server-dom-rspack/loader.js)",
+    "build-if-needed": "test -f dist/client.browser.js -a -f dist/client.node.js -a -f dist/server.node.js -a -f dist/RSCReferenceDiscoveryPlugin.js -a -f dist/RSCReferenceDiscoveryPlugin.d.ts -a -f dist/react-server-dom-rspack/plugin.js -a -f dist/react-server-dom-rspack/loader.js -a -f dist/webpack/RSCWebpackPlugin.js || (yarn run build && test -f dist/client.browser.js -a -f dist/client.node.js -a -f dist/server.node.js -a -f dist/RSCReferenceDiscoveryPlugin.js -a -f dist/RSCReferenceDiscoveryPlugin.d.ts -a -f dist/react-server-dom-rspack/plugin.js -a -f dist/react-server-dom-rspack/loader.js -a -f dist/webpack/RSCWebpackPlugin.js)",
     "prepack": "yarn run build-if-needed",
     "prepare": "yarn run build-if-needed"
   },

src/WebpackPlugin.ts

@@ -3,15 +3,7 @@ import {
   DEFAULT_CLIENT_REFERENCES_EXCLUDE,
   DEFAULT_CLIENT_REFERENCES_INCLUDE,
 } from "./clientReferences";
-import RSCWebpackPluginLib = require("./react-server-dom-webpack/plugin");
-
-type ReactFlightWebpackPlugin = {
-  apply(compiler: Compiler): void;
-};
-
-type ReactFlightWebpackPluginConstructor = {
-  new (options: unknown): ReactFlightWebpackPlugin;
-};
+import { RSCWebpackPlugin as RSCFlightWebpackPlugin } from "./webpack/RSCWebpackPlugin";
 
 type ClientReferenceSearchPath = {
   directory: string,
@@ -31,7 +23,7 @@ export type Options = {
 };
 
 export class RSCWebpackPlugin {
-  private plugin: ReactFlightWebpackPlugin;
+  private plugin: RSCFlightWebpackPlugin;
 
   constructor(options: Options) {
     const normalizedOptions =
@@ -48,7 +40,7 @@ export class RSCWebpackPlugin {
             ],
           }
         : options;
-    this.plugin = new (RSCWebpackPluginLib as ReactFlightWebpackPluginConstructor)(normalizedOptions);
+    this.plugin = new RSCFlightWebpackPlugin(normalizedOptions);
   }
 
   apply(compiler: Compiler) {