Use npm and update bundling

.claude/settings.json

@@ -3,8 +3,8 @@
     "allow": [
       "WebFetch(domain:prettier.io)",
       "WebFetch(domain:code.visualstudio.com)",
-      "Bash(pnpm prettier:*)",
-      "Bash(pnpm lint:*)",
+      "Bash(npm run prettier:*)",
+      "Bash(npm run lint:*)",
       "mcp__ide__getDiagnostics"
     ],
     "deny": [],

.devcontainer/devcontainer.json

@@ -20,7 +20,7 @@
   },
 
   // Use 'postCreateCommand' to run commands after the container is created.
-  "postCreateCommand": "pnpm install",
+  "postCreateCommand": "npm install",
 
   // Run as the node user for better security.
   "remoteUser": "node"

.github/PULL_REQUEST_TEMPLATE.md

@@ -20,8 +20,8 @@
 ## Checklist
 
 - [ ] I have read the [CONTRIBUTING](https://github.com/prettier/prettier-vscode/blob/main/CONTRIBUTING.md) guidelines
-- [ ] My code follows the code style of this project (`pnpm lint` passes)
-- [ ] I have run `pnpm prettier` to format my code
+- [ ] My code follows the code style of this project (`npm run lint` passes)
+- [ ] I have run `npm run prettier` to format my code
 - [ ] I have added/updated tests that prove my fix or feature works
-- [ ] All new and existing tests pass (`pnpm test`)
+- [ ] All new and existing tests pass (`npm test`)
 - [ ] I have updated the [CHANGELOG.md](https://github.com/prettier/prettier-vscode/blob/main/CHANGELOG.md) with a summary of my changes

.github/copilot-instructions.md

@@ -4,12 +4,12 @@ This is the official Prettier VS Code extension (`prettier.prettier-vscode`). It
 
 ## Development
 
-- Use `pnpm` as the package manager
-- Run `pnpm install` to install dependencies
-- Run `pnpm compile` to build for development
-- Run `pnpm test` to run tests (no VS Code instance can be running)
-- Run `pnpm lint` to check linting
-- Run `pnpm prettier` to format code
+- Use `npm` as the package manager
+- Run `npm install` to install dependencies
+- Run `npm run compile` to build for development
+- Run `npm run test` to run tests (no VS Code instance can be running)
+- Run `npm run lint` to check linting
+- Run `npm run prettier` to format code
 
 ## Architecture
 

.github/instructions/workflows.instructions.md

@@ -6,8 +6,7 @@ applyTo: ".github/workflows/*.yaml"
 
 ## Package Manager
 
-- Use `pnpm` as the package manager
-- Include `pnpm/action-setup@v4` before running pnpm commands
+- Use `npm` as the package manager
 - Use `actions/setup-node@v6` with `node-version-file: ".nvmrc"`
 
 ## Checkout and Setup Pattern
@@ -17,15 +16,15 @@ applyTo: ".github/workflows/*.yaml"
 - uses: actions/setup-node@v6
   with:
     node-version-file: ".nvmrc"
-- uses: pnpm/action-setup@v4
-- run: pnpm install
+- run: npm ci
 ```
 
 ## Testing
 
 - Linux tests require Xvfb for display: `/usr/bin/Xvfb :99 -screen 0 1024x768x24`
 - Set `DISPLAY: ":99.0"` environment variable for tests on Linux
-- Tests run via `pnpm test`
+- Tests run via `npm test`
+- Include `pnpm/action-setup@v4` in test jobs - some test fixtures use `packageManager: pnpm` to verify pnpm compatibility
 
 ## Permissions
 

.github/workflows/main.yaml

@@ -12,10 +12,9 @@ jobs:
       - uses: actions/setup-node@v6
         with:
           node-version-file: ".nvmrc"
-      - uses: pnpm/action-setup@v4
-      - run: pnpm install
-      - run: pnpm lint
-      - run: pnpm prettier --check
+      - run: npm ci
+      - run: npm run lint
+      - run: npm run prettier -- --check
 
   test:
     runs-on: ${{ matrix.os }}
@@ -29,16 +28,17 @@ jobs:
       - uses: actions/setup-node@v6
         with:
           node-version-file: ".nvmrc"
+      # pnpm is needed for test fixtures that use packageManager: pnpm
       - uses: pnpm/action-setup@v4
-      - run: corepack enable
-        shell: bash
+        with:
+          version: 10
 
       - run: /usr/bin/Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 & echo "Started xvfb"
         shell: bash
         if: ${{ success() && matrix.os == 'ubuntu-latest' }}
 
-      - run: pnpm install
-      - run: pnpm test
+      - run: npm ci
+      - run: npm test
         env:
           DISPLAY: ":99.0"
 
@@ -50,10 +50,10 @@ jobs:
       - uses: actions/setup-node@v6
         with:
           node-version-file: ".nvmrc"
-      - uses: pnpm/action-setup@v4
-      - run: pnpm install
-      - run: pnpm exec playwright install --with-deps chromium
-      - run: pnpm test:web
+      - run: npm ci
+      - run: npx playwright install --with-deps chromium
+      - run: npm run test:web
+
   package:
     runs-on: ubuntu-latest
     needs: [lint, test, test-web]
@@ -63,16 +63,16 @@ jobs:
       - uses: actions/setup-node@v6
         with:
           node-version-file: ".nvmrc"
-      - uses: pnpm/action-setup@v4
-      - run: pnpm install
-      - run: pnpm compile
+      - run: npm ci
+      - run: npm run compile
       - run: npx @vscode/vsce package --no-dependencies
       - run: echo "VSIX_PATH=$(find . -maxdepth 1 -type f -iname "*.vsix" | head -1)" >> $GITHUB_ENV
       - run: echo "VSIX_NAME=$(basename $(find . -maxdepth 1 -type f -iname "*.vsix" | head -1))" >> $GITHUB_ENV
       - uses: actions/upload-artifact@v5
         with:
           path: ${{ env.VSIX_PATH }}
           name: ${{ env.VSIX_NAME }}
+
   release:
     runs-on: ubuntu-latest
     needs: package
@@ -83,7 +83,6 @@ jobs:
       - uses: actions/setup-node@v6
         with:
           node-version-file: ".nvmrc"
-      - uses: pnpm/action-setup@v4
       - name: Check if prerelease
         id: check_prerelease
         run: |
@@ -92,8 +91,8 @@ jobs:
           else
             echo "is_prerelease=false" >> $GITHUB_OUTPUT
           fi
-      - run: pnpm install
-      - run: pnpm compile
+      - run: npm ci
+      - run: npm run compile
       - run: npx @vscode/vsce package --no-dependencies ${{ steps.check_prerelease.outputs.is_prerelease == 'true' && '--pre-release' || '' }}
       - run: echo "VSIX_PATH=$(find . -maxdepth 1 -type f -iname "*.vsix" | head -1)" >> $GITHUB_ENV
       - run: echo "VSIX_NAME=$(basename $(find . -maxdepth 1 -type f -iname "*.vsix" | head -1))" >> $GITHUB_ENV

.gitignore

@@ -8,5 +8,7 @@ node_modules
 *.log
 test-results.xml
 
-# Generated pnpm lockfiles in test fixtures (npm lockfiles are tracked)
-test-fixtures/**/pnpm-lock.yaml
+# Generated lockfiles in test fixtures
+test-fixtures/**/package-lock.json
+test-fixtures/**/pnpm-lock.yaml
+test-fixtures/**/yarn.lock

.prettierignore

@@ -3,4 +3,4 @@ out/
 dist/
 test-fixtures/
 node_modules/
-pnpm-lock.yaml
+package-lock.json

.vscodeignore

@@ -18,7 +18,7 @@ tsconfig.scripts.json
 eslint.config.mjs
 lefthook.yml
 esbuild.mjs
-pnpm-lock.yaml
+package-lock.json
 dist/*.map
 
 node_modules/

CLAUDE.md

@@ -10,31 +10,31 @@ This is the official Prettier VS Code extension (`prettier.prettier-vscode`). It
 
 ```bash
 # Install dependencies
-pnpm install
+npm install
 
 # Build for development
-pnpm compile
+npm run compile
 
 # Build for production
-pnpm package
+npm run package
 
 # Watch mode (esbuild + TypeScript type checking)
-pnpm watch
+npm run watch
 
 # Run linting
-pnpm lint
+npm run lint
 
 # Format code with Prettier
-pnpm prettier
+npm run prettier
 
 # Run tests (requires no VS Code instance running)
-pnpm test
+npm test
 
 # Run web extension tests (headless browser)
-pnpm test:web
+npm run test:web
 
 # Compile tests only
-pnpm compile:test
+npm run compile:test
 ```
 
 ## Running Tests
@@ -44,16 +44,16 @@ pnpm compile:test
 Tests require the `test-fixtures/` workspace and run inside a VS Code instance:
 
 1. **Via VS Code Debug**: Open Debug sidebar → "Launch Tests"
-2. **Via CLI**: `pnpm test` (no VS Code instance can be running)
+2. **Via CLI**: `npm test` (no VS Code instance can be running)
 
-Before running tests, `pnpm pretest` installs dependencies in various test fixture directories.
+Before running tests, `npm run pretest` installs dependencies in various test fixture directories.
 
 ### Web Extension Tests
 
 Web tests run in a headless Chromium browser to verify the web extension works correctly:
 
 ```bash
-pnpm test:web
+npm run test:web
 ```
 
 Web tests are located in `src/test/web/suite/` and test the extension's browser functionality.
@@ -102,7 +102,7 @@ esbuild produces two bundles:
 
 The browser build uses path aliasing to swap `ModuleResolver` → `BrowserModuleResolver`.
 
-Build configuration is in `esbuild.js`.
+Build configuration is in `esbuild.mjs`.
 
 ## Test Fixtures
 

CONTRIBUTING.md

@@ -5,7 +5,6 @@ Thank you for your interest in contributing to the Prettier VS Code extension! F
 ## Prerequisites
 
 - [Node.js](https://nodejs.org/) (see `.nvmrc` for version)
-- [pnpm](https://pnpm.io/) (v10.24.0 or later)
 - [Visual Studio Code](https://code.visualstudio.com/)
 
 ## Getting Started
@@ -20,32 +19,32 @@ Thank you for your interest in contributing to the Prettier VS Code extension! F
 2. Install dependencies:
 
    ```bash
-   pnpm install
+   npm install
    ```
 
 3. Build the extension:
    ```bash
-   pnpm compile
+   npm run compile
    ```
 
 ## Development
 
 ### Common Commands
 
 ```bash
-pnpm install          # Install dependencies
-pnpm compile          # Build for development (esbuild + type checking)
-pnpm compile:test     # Compile tests only
-pnpm watch            # Build and watch for changes
-pnpm lint             # Run ESLint
-pnpm prettier         # Format code with Prettier
-pnpm test             # Run tests
+npm install           # Install dependencies
+npm run compile       # Build for development (esbuild + type checking)
+npm run compile:test  # Compile tests only
+npm run watch         # Build and watch for changes
+npm run lint          # Run ESLint
+npm run prettier      # Format code with Prettier
+npm test              # Run tests
 ```
 
 ### Running the Extension
 
 1. Open this repository in VS Code
-2. Run `pnpm compile` to build
+2. Run `npm run compile` to build
 3. Press `F5` or go to Debug sidebar → "Run Extension"
 4. A new VS Code window will open with the extension loaded
 
@@ -61,23 +60,23 @@ Tests run inside a VS Code instance and use the `test-fixtures/` workspace.
 **Desktop Tests (Via CLI):**
 
 ```bash
-pnpm test
+npm test
 ```
 
 > **Note:** No VS Code instance can be running when using the CLI, or tests won't start.
 
 **Web Extension Tests:**
 
 ```bash
-pnpm test:web
+npm run test:web
 ```
 
 This runs the extension in a headless Chromium browser to verify the web extension works correctly.
 
 ## Code Style
 
-- Code is formatted with Prettier (run `pnpm prettier` before committing)
-- Linting is enforced with ESLint (run `pnpm lint` to check)
+- Code is formatted with Prettier (run `npm run prettier` before committing)
+- Linting is enforced with ESLint (run `npm run lint` to check)
 - Pre-commit hooks automatically format and lint staged files
 
 ## Architecture Overview
@@ -96,8 +95,8 @@ Key components:
 ## Submitting Changes
 
 1. Fork the repository and create a branch for your changes
-2. Make your changes and ensure tests pass (`pnpm test`)
-3. Run `pnpm lint` and `pnpm prettier` to ensure code style compliance
+2. Make your changes and ensure tests pass (`npm test`)
+3. Run `npm run lint` and `npm run prettier` to ensure code style compliance
 4. Submit a pull request with a clear description of your changes
 
 For bug fixes, please include a test case that demonstrates the fix when possible.