# NPM to Yarn Migration Complete

All npm commands have been successfully replaced with yarn equivalents across the project.

## Files Updated:

### 1. package.json
- `"validate": "npm run lint && npm run build"` → `"validate": "yarn lint && yarn build"`
- `"pretest": "npm run validate"` → `"pretest": "yarn validate"`
- Package manager already set to `"packageManager": "yarn@1.22.19"`

### 2. Dockerfile
- `RUN npm install && npm cache clean --force` → `RUN yarn install --frozen-lockfile && yarn cache clean`
- `RUN npm run build` → `RUN yarn build`
- `RUN npm prune --production` → `RUN yarn install --production --frozen-lockfile`

### 3. .github/workflows/ci.yml
- Node.js cache changed from `'npm'` to `'yarn'`
- `npm install` → `yarn install --frozen-lockfile`
- `npm run lint` → `yarn lint`
- `npm run build` → `yarn build`  
- `npm run validate` → `yarn validate`

### 4. .claude/settings.local.json
- All npm-related Bash permissions updated:
  - `"Bash(npm run typecheck:*)"` → `"Bash(yarn typecheck:*)"`
  - `"Bash(npm run type-check:*)"` → `"Bash(yarn type-check:*)"`
  - `"Bash(npm run lint)"` → `"Bash(yarn lint)"`
  - `"Bash(npm run build:*)"` → `"Bash(yarn build:*)"`
  - `"Bash(npm run dev:*)"` → `"Bash(yarn dev:*)"`
  - `"Bash(npm run:*)"` → `"Bash(yarn run:*)"`
  - `"Bash(npm start)"` → `"Bash(yarn start)"`

### 5. Memory Files Updated
- `.serena/memories/docker-traefik-ssl-complete-setup.md`: Updated management commands and build process references
- `.serena/memories/typescript_migration_complete.md`: Updated build process documentation

## Benefits of Yarn Migration:
- Deterministic dependency resolution with yarn.lock
- Faster installs with better caching
- More reliable CI/CD builds with --frozen-lockfile
- Better workspace support (if needed in future)
- Consistent package management across development and production