dev-npxify

Dependency NPXification

Audit project dependencies and identify packages that can be replaced with npx or pnpm dlx to reduce the installed dependency count.

Package Manager Detection

Check the project for lockfiles to determine the package manager:

• pnpm-lock.yaml → use pnpm dlx
• package-lock.json → use npx
• yarn.lock → use npx (yarn dlx also works but npx is more universal)

Workflow

Step 1: Read all package.json files

Find all package.json files in the project (root + workspaces). For each, catalog all dependencies and devDependencies.

Step 2: Analyze each dependency

For each dependency, determine how it is used:

1. Search for imports/requires — grep for require('pkg'), from 'pkg', import 'pkg' in source code
2. Search for CLI usage — check scripts in package.json for the package binary name
3. Check if other packages depend on it — eslint plugins need eslint, prettier plugins need prettier, etc.

Step 3: Classify each dependency

Classify into one of these categories:

Replaceable with npx/pnpm dlx (White List patterns)

These are CLI tools that run infrequently and have few sub-dependencies:

Package	Typical Usage	Notes
husky	"prepare": "husky"	One-time setup on install
lint-staged	Called from git hooks	Runs only on commit
serve / http-server	"serve": "serve dist"	Ad-hoc static file serving
create-* / init-*	Project scaffolding	One-time use
madge	Dependency graph	Occasional analysis
depcheck	Unused dep detection	Occasional analysis
license-checker	License audit	Occasional audit
npm-check-updates / ncu	Update checking	Occasional use
@takazudo/mdx-formatter	Markdown formatting	Infrequent, lint-staged
concurrently / npm-run-all	Script runners	If used only in one script
rimraf / del-cli	Cross-platform rm	Simple CLI, few deps
cross-env	Cross-platform env vars	Simple CLI, few deps
dotenv-cli	Env file loading	Simple CLI

NEVER replace with npx/pnpm dlx (Black List)

These must stay as installed dependencies:

Category	Examples	Reason
Runtime libraries	react, express, lodash, axios	Imported in source code
Build toolchains	webpack, vite, esbuild, next, typescript	Deep integration, used constantly
Framework packages	@docusaurus/, @nestjs/, gatsby	Core framework
Type definitions	@types/*	Needed for IDE and typecheck
Test frameworks	jest, vitest, mocha, playwright	Run frequently, deep integration
Linter + plugins	eslint, eslint-plugin-*, prettier (when used by eslint-plugin-prettier)	Plugins must resolve from same node_modules
PostCSS/Tailwind	tailwindcss, postcss, autoprefixer	Build-time integration
Heavy CLI tools (100+ deps)	electron-builder (300+ deps), webpack-cli	Too slow to download each time
Packages used by other deps	prettier (if eslint-plugin-prettier is installed)	Must be resolvable
Config dependencies	globals (if imported in eslint.config.mjs)	Imported at config load time

Step 4: Present findings

Present a table to the user:

## Replaceable with pnpm dlx

| Package | Location | Current Usage | Sub-deps |
|---|---|---|---|
| husky | root devDep | prepare script | ~1 |
| lint-staged | doc devDep | pre-commit hook | ~30 |

## Keep as dependency (cannot replace)

| Package | Location | Reason |
|---|---|---|
| eslint | doc devDep | Plugins need local resolution |
| typescript | blog devDep | Build toolchain, IDE integration |

Step 5: Apply changes (after user approval)

For each approved replacement:

1. Update the script/hook that invokes the tool to use pnpm dlx <package> or npx <package>
2. Remove the package from dependencies or devDependencies
3. Run pnpm install (or npm install) to update the lockfile
4. Test that the affected scripts still work

Key Decision Criteria

When unsure whether a package is replaceable, check these:

1. How many sub-dependencies? — Run pnpm why <package> or check npm. If 100+, keep as dep.
2. How often is it invoked? — Daily dev workflow (keep) vs occasional/one-time (replaceable).
3. Is it imported in code? — If require/imported, it MUST stay as a dependency.
4. Do other installed packages depend on it? — If yes, keep it.
5. Does it need to be in the same node_modules tree? — ESLint plugins, Babel plugins, etc. must co-locate.

Common Gotchas

• prettier: Often can be replaced with pnpm dlx, BUT if eslint-plugin-prettier is installed, prettier must stay as a devDependency (the plugin requires it to be locally resolvable).
• typescript: Technically a CLI tool, but it's also needed for IDE type resolution and by build tools. Always keep as devDep.
• electron-builder: Has 300+ sub-dependencies. Using pnpm dlx downloads all of them every time — extremely slow. Always keep as devDep.
• lint-staged in monorepos: The lint-staged config may reference pnpm exec <tool> for tools that ARE installed. Only the lint-staged binary itself can be dlx'd; the tools it invokes still need to be installed.