A VS Code extension that checks installed npm package versions against package.json declarations and notifies you about mismatches. Fully local — no external API calls.

Features

🔍 Version Mismatch Detection

Scans all package.json files in your workspace
Compares installed versions (from node_modules) against declared ranges: exact, ^, ~, >=, <=, ranges
Highlights mismatched lines directly in the editor with inline diagnostics

📢 Smart Notifications

Single file with mismatches:

⚠️ Update dependencies
   From .\frontend\package.json
[Run "pnpm install"]     [Open file]

Multiple files with mismatches:

⚠️ Update dependencies
   From .\frontend\package.json
   .\backend\package.json
[View and install...]

"Run install" button shows PM-specific command (npm install, yarn install, pnpm install, bun install)
"View and install" opens a QuickPick dialog with checkboxes — select which packages to install
Install runs sequentially in a single terminal

⚡ Automatic Checks

On file open — checks when a package.json is opened (debounced)
On file edit — re-checks after editing (debounced 5s)
On Git branch switch — re-checks all package.json in workspace
Periodic — re-checks visible editors every 30s (configurable)
Manual — NPM Deps: Check all dependencies command

📦 Multi-Manager Support

Automatically detects the package manager via lock files or packageManager field:

npm (package-lock.json)
yarn (yarn.lock)
pnpm (pnpm-lock.yaml)
bun (bun.lockb)

🛠 Code Actions

Install dependencies — runs npm install (or yarn/pnpm/bun) in the terminal

⚙️ Configurable

All features can be toggled via VS Code settings (npmDepsChecker.*):

Enable/disable the entire extension
Control which events trigger checks (open, edit, git switch, periodic)
Adjust debounce timing
Toggle notifications and diagnostics

Commands

Command	Title	Description
`extension.checkNpmDeps`	NPM Deps: Check all dependencies	Run a full check of all package.json files
`extension.installNpmDeps`	NPM Deps: Install dependencies	Run install in the directory of a package.json
`extension.openDiagnosticFile`	NPM Deps: Open diagnostic file	Open the problematic file from a notification

Settings

Setting	Default	Description
`npmDepsChecker.enabled`	`true`	Enable or disable the extension
`npmDepsChecker.checkOnFileOpen`	`true`	Check on file open
`npmDepsChecker.checkOnFileEdit`	`true`	Check on file edit (5s debounce)
`npmDepsChecker.checkOnGitSwitch`	`true`	Check on Git branch switch
`npmDepsChecker.periodicCheckEnabled`	`true`	Periodic check (30s)
`npmDepsChecker.showNotifications`	`true`	Show warning notifications
`npmDepsChecker.openDebounceMs`	`300`	Debounce delay on open (ms)
`npmDepsChecker.editDebounceMs`	`5000`	Debounce delay on edit (ms)
`npmDepsChecker.periodicCheckIntervalMs`	`30000`	Periodic check interval (ms)
`npmDepsChecker.features.peerDepsAnalysis`	`true`	Analyze peerDependencies

Requirements

VS Code 1.85.0 or higher
Node.js and the package manager of your project (npm, yarn, pnpm, or bun)

How It Works

The extension scans all **/package.json files in your workspace (excluding node_modules)
For each dependency, it reads the installed version from node_modules/<package>/package.json
It compares the installed version against the declared semver range using its own semver engine
Mismatches are shown as inline diagnostics in the editor
Notifications guide you to fix the issues

No data is sent to any external service. All checks are performed locally.

Release Notes

See CHANGELOG.md for full history.

License

MIT

NPM Deps Checker