# vite

A performance optimization guide with 42 Vite rules. Helps your AI agent audit configs, optimize bundles, and fix slow dev servers.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 358 installs · ★ 218
- Author: pproenca
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/pproenca/dot-skills/tree/HEAD/skills/.experimental/vite/SKILL.md
- Updated: 2026-08-15
- HTML: https://affpapa.org/en/nevibecode/skills/pproenca-vite

## What it does

The skill injects an optimization manual for Vite directly into the assistant prompt. It features 42 rules organized across eight priority levels. The highest priority covers dependency pre-bundling, plugin efficiency, and bundle chunking. Lower tiers address imports, build settings, local server tuning, CSS, and SSR patterns.

Instead of generic tips, the rules contain concrete configuration choices. The guide advises SWC over Babel for React, points to Lightning CSS over PostCSS, and outlines when to skip barrel files. It also covers `manualChunks` setups and module discovery entry points.

Dev server performance suffers quickly on Linux or WSL if file descriptor limits or watch watchers fail. The skill provides explicit workarounds for these environments, including polling options and server warmup configurations.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add pproenca/dot-skills --skill vite -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/vite/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/vite/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add pproenca/dot-skills --skill vite -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/vite/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add pproenca/dot-skills --skill vite -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/vite/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install pproenca/dot-skills vite
```

2. **Manually: put the files in place**
- File: `.github/skills/vite/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add pproenca/dot-skills --skill vite -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/pproenca/dot-skills --path skills/.experimental/vite
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/vite/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add pproenca/dot-skills --skill vite -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/pproenca/dot-skills/tree/HEAD/skills/.experimental/vite/SKILL.md

## When to use it
- split vendor code using `manualChunks`
- fix slow dev server startup and HMR bottlenecks
- replace heavy barrel files with direct imports
- tune dependency pre-bundling for monorepos

## Example prompts
- Review my `vite.config.ts` and set up vendor chunk splitting.
- The dev server starts slowly in WSL. Help me configure warmup and file polling.
- Audit my Vite plugins and suggest faster alternatives like SWC.

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: dfa56384220de207.

BEGIN THIRD-PARTY FILE dfa56384220de207
```text
---
name: vite
description: Vite performance optimization guidelines. This skill should be used when writing, reviewing, or refactoring Vite configuration and projects to ensure optimal performance patterns. Triggers on tasks involving Vite config, build optimization, dependency pre-bundling, plugin development, bundle analysis, or HMR issues.
---

# Vite Best Practices

Comprehensive performance optimization guide for Vite applications. Contains 42 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.

## When to Apply

Reference these guidelines when:
- Configuring Vite for a new project
- Troubleshooting slow dev server startup
- Optimizing production bundle size
- Debugging HMR issues
- Writing or evaluating Vite plugins
- Migrating from Webpack or other bundlers

## Rule Categories by Priority

| Priority | Category | Impact | Prefix |
|----------|----------|--------|--------|
| 1 | Dependency Pre-bundling | CRITICAL | `deps-` |
| 2 | Plugin Performance | CRITICAL | `plugin-` |
| 3 | Bundle Optimization | CRITICAL | `bundle-` |
| 4 | Import Resolution | HIGH | `import-` |
| 5 | Build Configuration | HIGH | `build-` |
| 6 | Development Server | MEDIUM-HIGH | `dev-` |
| 7 | CSS Optimization | MEDIUM | `css-` |
| 8 | Advanced Patterns | LOW-MEDIUM | `advanced-` |

## Quick Reference

### 1. Dependency Pre-bundling (CRITICAL)

- [`deps-include-large-cjs`](references/deps-include-large-cjs.md) - Include large dependencies with many modules
- [`deps-exclude-esm`](references/deps-exclude-esm.md) - Exclude small ESM dependencies
- [`deps-force-rebundle`](references/deps-force-rebundle.md) - Use --force flag for dependency changes
- [`deps-hold-until-crawl`](references/deps-hold-until-crawl.md) - Configure holdUntilCrawlEnd for startup behavior
- [`deps-entries`](references/deps-entries.md) - Configure custom entry points for discovery
- [`deps-linked-packages`](references/deps-linked-packages.md) - Handle linked dependencies in monorepos

### 2. Plugin Performance (CRITICAL)

- [`plugin-lazy-imports`](references/plugin-lazy-imports.md) - Use dynamic imports in plugin code
- [`plugin-avoid-long-hooks`](references/plugin-avoid-long-hooks.md) - Avoid long operations in startup hooks
- [`plugin-transform-early-return`](references/plugin-transform-early-return.md) - Early return in transform hooks
- [`plugin-audit-community`](references/plugin-audit-community.md) - Audit community plugins for performance
- [`plugin-swc-over-babel`](references/plugin-swc-over-babel.md) - Use SWC instead of Babel for React

### 3. Bundle Optimization (CRITICAL)

- [`bundle-manual-chunks`](references/bundle-manual-chunks.md) - Use manualChunks for vendor splitting
- [`bundle-dynamic-imports`](references/bundle-dynamic-imports.md) - Use dynamic imports for route-level splitting
- [`bundle-analyze`](references/bundle-analyze.md) - Analyze bundle composition
- [`bundle-tree-shaking`](references/bundle-tree-shaking.md) - Enable effective tree-shaking
- [`bundle-chunk-warning`](references/bundle-chunk-warning.md) - Address large chunk warnings
```
END THIRD-PARTY FILE dfa56384220de207

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