Remove the worker instance

.github/copilot-instructions.md

@@ -23,7 +23,7 @@ Core components:
 - `src/extension.ts` - Extension activation, creates ModuleResolver, PrettierEditService, and StatusBar
 - `src/PrettierEditService.ts` - Registers VS Code document formatting providers, handles format requests
 - `src/ModuleResolver.ts` - Resolves local/global Prettier installations, falls back to bundled Prettier
-- `src/PrettierInstance.ts` - Interface for Prettier loading, with `PrettierMainThreadInstance` and `PrettierWorkerInstance` implementations
+- `src/PrettierInstance.ts` - Interface for Prettier loading, with `PrettierMainThreadInstance` implementations
 
 esbuild produces two bundles:
 
@@ -62,14 +62,13 @@ When reviewing pull requests, focus on:
 
 ### Prettier Compatibility
 
-- Changes work with both Prettier v2 (sync) and v3+ (async/worker)
+- Changes work with both Prettier v2 (sync) and v3+ (async)
 - Module resolution fallback chain is maintained: local → global → bundled
 - Config file watching covers all Prettier config formats
 
 ### Performance
 
 - Avoid blocking the extension host main thread
-- `PrettierWorkerInstance` runs Prettier in a worker thread to avoid blocking
 - Module and config resolution results are cached appropriately
 
 ### Browser Compatibility

.github/instructions/typescript.instructions.md

@@ -28,7 +28,7 @@ This is a VS Code extension. Follow these patterns:
 ## Prettier Integration
 
 - Support both Prettier v2 and v3+ via `PrettierInstance` interface
-- `PrettierMainThreadInstance` loads directly, `PrettierWorkerInstance` uses worker thread
+- `PrettierMainThreadInstance` loads directly
 - Module resolution: local install → global install → bundled Prettier
 - Handle `.prettierrc`, `.prettierignore`, and `package.json` prettier config
 

CHANGELOG.md

@@ -6,6 +6,7 @@ All notable changes to the "prettier-vscode" extension will be documented in thi
 
 ## [unreleased]
 
+- Support configuration file with imported plugins
 - [BREAKING CHANGE] Bundled Prettier upgraded from v2.8.8 to v3.x
 - [BREAKING CHANGE] Updated `trailingComma` default from `"es5"` to `"all"` to match Prettier 3
 - Maintained backward compatibility with projects using Prettier v2.x (projects with explicit Prettier v2 dependencies will continue to use their local version)

CLAUDE.md

@@ -86,12 +86,10 @@ Web tests are located in `src/test/web/suite/` and test the extension's browser
 - Caches resolved modules and configurations
 - Handles Workspace Trust restrictions
 
-**Prettier Instance** (`PrettierInstance.ts`, `PrettierMainThreadInstance.ts`, `PrettierWorkerInstance.ts`):
+**Prettier Instance** (`PrettierInstance.ts`, `PrettierMainThreadInstance.ts`):
 
 - `PrettierInstance` is an interface with two implementations
 - `PrettierMainThreadInstance` loads Prettier directly via `require()`
-- `PrettierWorkerInstance` loads Prettier in a worker thread to avoid blocking
-- Works with both Prettier v2 and v3+
 
 ### Bundling
 

CONTRIBUTING.md

@@ -90,7 +90,7 @@ Key components:
 
 - `PrettierEditService.ts` - Handles document formatting
 - `ModuleResolver.ts` - Resolves Prettier installations (local, global, or bundled)
-- `PrettierInstance.ts` - Interface for Prettier, with `PrettierMainThreadInstance` and `PrettierWorkerInstance` implementations
+- `PrettierInstance.ts` - Interface for Prettier, with `PrettierMainThreadInstance` implementations
 
 ## Submitting Changes
 

README.md

@@ -55,7 +55,7 @@
 </p>
 
 > [!IMPORTANT]
-> **Extension Migration:** This extension is being moved from `esbenp.prettier-vscode` to [`prettier.prettier-vscode`](https://marketplace.visualstudio.com/items?itemName=prettier.prettier-vscode). Version 12+ is only published to the new for now as it is a major change. Once it is stable, we will publish v12 to both extensions and deprecate the `esbenp.prettier-vscode` extension. **Version 12.x is currently not stable, use with caution in production environments.** 
+> **Extension Migration:** This extension is being moved from `esbenp.prettier-vscode` to [`prettier.prettier-vscode`](https://marketplace.visualstudio.com/items?itemName=prettier.prettier-vscode). Version 12+ is only published to the new for now as it is a major change. Once it is stable, we will publish v12 to both extensions and deprecate the `esbenp.prettier-vscode` extension. **Version 12.x is currently not stable, use with caution in production environments.**
 
 ## Installation
 

esbuild.mjs

@@ -160,43 +160,12 @@ const webTestConfig = {
   plugins: [esbuildProblemMatcherPlugin],
 };
 
-function copyWorkerFile() {
-  // Copy to dist (for production/esbuild bundle)
-  const distWorkerDir = "dist/worker";
-  if (!fs.existsSync(distWorkerDir)) {
-    fs.mkdirSync(distWorkerDir, { recursive: true });
-  }
-  fs.copyFileSync(
-    "src/worker/prettier-instance-worker.js",
-    "dist/worker/prettier-instance-worker.js",
-  );
-
-  // Copy to out (for tests/tsc output)
-  const outWorkerDir = "out/worker";
-  if (!fs.existsSync(outWorkerDir)) {
-    fs.mkdirSync(outWorkerDir, { recursive: true });
-  }
-  fs.copyFileSync(
-    "src/worker/prettier-instance-worker.js",
-    "out/worker/prettier-instance-worker.js",
-  );
-}
-
 async function main() {
   const nodeCtx = await esbuild.context(nodeConfig);
   const browserCtx = await esbuild.context(browserConfig);
   const webTestCtx = await esbuild.context(webTestConfig);
 
-  // Copy worker file
-  copyWorkerFile();
-
   if (watch) {
-    // Watch the worker file for changes
-    fs.watchFile("src/worker/prettier-instance-worker.js", () => {
-      console.log("[watch] copying worker file");
-      copyWorkerFile();
-    });
-
     await Promise.all([
       nodeCtx.watch(),
       browserCtx.watch(),

eslint.config.mjs

@@ -13,7 +13,6 @@ export default tseslint.config(
       "node_modules/**",
       ".vscode-test/**",
       ".vscode-test-web/**",
-      "src/worker/**",
     ],
   },
 

src/ModuleResolver.ts

@@ -31,10 +31,8 @@ import {
   getWorkspaceRelativePath,
 } from "./utils/workspace";
 import { PrettierInstance } from "./PrettierInstance";
-import { PrettierWorkerInstance } from "./PrettierWorkerInstance";
 import { PrettierMainThreadInstance } from "./PrettierMainThreadInstance";
-import { loadNodeModule, resolveConfigPlugins } from "./utils/resolvers";
-import { isAboveV3 } from "./utils/versions";
+import { resolveConfigPlugins } from "./utils/resolvers";
 
 const minPrettierVersion = "1.13.0";
 
@@ -128,45 +126,6 @@ export class ModuleResolver implements ModuleResolverInterface {
     return prettier;
   }
 
-  private loadPrettierVersionFromPackageJson(modulePath: string): string {
-    let cwd = "";
-    try {
-      fs.readdirSync(modulePath); // checking if dir with readdir will handle directories and symlinks
-      cwd = modulePath;
-    } catch {
-      cwd = path.dirname(modulePath);
-    }
-    const packageJsonPath = findUp.sync(
-      (dir) => {
-        const pkgFilePath = path.join(dir, "package.json");
-        if (fs.existsSync(pkgFilePath)) {
-          return pkgFilePath;
-        }
-      },
-      { cwd },
-    );
-
-    if (!packageJsonPath) {
-      throw new Error("Cannot find Prettier package.json");
-    }
-
-    const prettierPkgJson = loadNodeModule(packageJsonPath) as {
-      version?: string;
-    } | null;
-
-    let version: string | null = null;
-
-    if (prettierPkgJson && typeof prettierPkgJson.version === "string") {
-      version = prettierPkgJson.version;
-    }
-
-    if (!version) {
-      throw new Error("Cannot load Prettier version from package.json");
-    }
-
-    return version;
-  }
-
   /**
    * Returns an instance of the prettier module.
    * @param fileName The path of the file to use as the starting point. If none provided, the bundled prettier will be used.
@@ -246,16 +205,8 @@ export class ModuleResolver implements ModuleResolverInterface {
         return moduleInstance;
       } else {
         try {
-          const prettierVersion =
-            this.loadPrettierVersionFromPackageJson(modulePath);
+          moduleInstance = new PrettierMainThreadInstance(modulePath);
 
-          const isAboveVersion3 = isAboveV3(prettierVersion);
-
-          if (isAboveVersion3) {
-            moduleInstance = new PrettierWorkerInstance(modulePath);
-          } else {
-            moduleInstance = new PrettierMainThreadInstance(modulePath);
-          }
           if (moduleInstance) {
             this.path2Module.set(modulePath, moduleInstance);
           }