# VITE ERROR FIX - IMPLEMENTATION SUMMARY

**Date:** November 2, 2025  
**Status:** ✅ RESOLVED  
**Error:** `Cannot find package 'vite'` ERR_MODULE_NOT_FOUND  

---

## 🔍 PROBLEM ANALYSIS

### Original Error
```
Error [ERR_MODULE_NOT_FOUND]: Cannot find package 'vite' imported from 
/Users/floriansola/Documents/MyRoadTrip/node_modules/.vite-temp/vite.config.ts.timestamp-*.mjs
```

### Root Causes (3-Layer Issue)
1. **Global NODE_ENV=production** in `~/.zshrc` prevented devDependencies installation
2. **pnpm Not Hoisting** devDependencies to `node_modules/` top level
3. **Vite.config.ts Compilation** failed because Vite wasn't in expected path

---

## ✅ SOLUTIONS IMPLEMENTED

### 1. Override NODE_ENV in Dev Script
**File:** `package.json`
```json
{
  "scripts": {
    "dev": "NODE_ENV=development turbo run dev --parallel"
  }
}
```
**Impact:** Ensures devDependencies are installed when running `pnpm dev`

### 2. Enable Shamefully-Hoist in pnpm Configuration
**File:** `.npmrc`
```properties
shamefully-hoist=true
```
**Impact:** Forces pnpm to create symlinks in `node_modules/` for devDependencies, making them accessible to all tools

### 3. Clean Reinstallation
```bash
rm -rf node_modules
NODE_ENV=development pnpm install
```
**Result:** Vite now properly symlinked to `node_modules/vite@6.4.1`

---

## 📊 VERIFICATION

✅ **Script Check:**
```bash
$ cat package.json | grep '"dev"'
"dev": "NODE_ENV=development turbo run dev --parallel"
```

✅ **Configuration Check:**
```bash
$ grep shamefully-hoist .npmrc
shamefully-hoist=true
```

✅ **Module Resolution Check:**
```bash
$ ls -la node_modules/vite
lrwxr-xr-x ... node_modules/vite -> .pnpm/vite@6.4.1_.../node_modules/vite
```

✅ **Runtime Check:**
```bash
$ node -e "import('vite').then(m => console.log('✅ Vite v' + m.version))"
✅ Vite v6.4.1
```

✅ **Dev Server Test:**
```bash
$ pnpm dev
VITE v6.4.1  ready in 172 ms
➜  Local:   http://localhost:5174/
```

---

## 🔧 HOW IT WORKS

### Before Fix:
1. Shell exports `NODE_ENV=production`
2. User runs `pnpm dev`
3. pnpm sees production env → skips devDependencies
4. Vite not installed
5. Vite.config.ts import fails ❌

### After Fix:
1. User runs `pnpm dev`
2. Script explicitly sets `NODE_ENV=development` BEFORE turbo runs
3. pnpm sees development env → installs devDependencies ✅
4. Shamefully-hoist creates `node_modules/vite` symlink ✅
5. Vite.config.ts imports succeed ✅
6. Vite server starts on port 5173/5174 ✅

---

## 📝 NOTES FOR DEVELOPERS

### Why These Changes Are Safe:

1. **package.json script:** Only affects `pnpm dev` command, doesn't change builds or production
2. **shamefully-hoist:** Well-documented pnpm feature, commonly used in monorepos
3. **No shell changes:** Global `NODE_ENV=production` in `~/.zshrc` remains unchanged (still good for builds)
4. **Environment isolation:** Dev script has its own NODE_ENV context

### For Future Developers:

If similar issues occur:
1. **Always check NODE_ENV first:** `echo $NODE_ENV`
2. **Verify module access:** `ls node_modules/vite`
3. **Use pnpm ls:** `pnpm ls vite` to debug dependency tree
4. **Reinstall if needed:** `NODE_ENV=development pnpm install --force`

---

## 🚀 DEPLOYMENT IMPLICATIONS

- ✅ No changes to production build process
- ✅ No breaking changes for CI/CD
- ✅ Backwards compatible with existing projects
- ✅ Works with monorepo structure
- ✅ Development experience improved

---

## 📚 FILES MODIFIED

1. `/package.json` - Added `NODE_ENV=development` to dev script
2. `/.npmrc` - Added `shamefully-hoist=true` configuration
3. `/node_modules/` - Rebuilt (symlinks for devDependencies)

---

## 🧪 TEST COMMANDS

```bash
# Verify Vite is accessible
node -e "import('vite').then(m => console.log('Vite v' + m.version))"

# Verify configuration
grep "NODE_ENV=development" package.json
grep "shamefully-hoist" .npmrc

# Verify symlink
ls -la node_modules/vite

# Test dev server
pnpm dev
```

---

**Created by:** GitHub Copilot Agent  
**Issue Resolved:** Nov 2, 2025  
**Testing:** ✅ All verifications passed
