Add publishing notes to CLAUDE.md for future registry distribution

Author: arashiyama

CLAUDE.md

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+# CLAUDE.md - Assistant Guidelines
+
+## Commands
+- `npm start` - Start the server
+- `npm run dev` - Start with nodemon for auto-reload during development 
+- `npm test` - Run all tests with coverage reports
+- Run specific test suites:
+  - `npm run test:auth` - Authentication tests
+  - `npm run test:api` - API tests
+  - `npm run test:db` - Database tests
+  - `npm run test:batch` - Batch operations
+  - `npm run test:duplicates` - Duplicate detection
+  - `npm run test:validation` - Input validation
+  - `npm run test:recurring` - Recurring event exceptions
+  - `npm run test:notifications` - Notification system
+- Run individual tests:
+  - `jest tests/api.test.js` - Run specific test file
+  - `jest -t "should return 404"` - Run tests matching description
+- `npm run db:reset` - Reset the database
+
+## Code Style Guidelines
+- **Imports**: Group by type (node modules first, then local)
+- **Async/Await**: Use for all asynchronous operations
+- **Error Handling**: try/catch blocks for async functions
+- **Naming**: camelCase for variables/functions, UPPER_CASE for constants
+- **Functions**: Prefix promise-returning functions with async
+- **Responses**: JSON format with {status, data/error} structure
+- **Input Validation**: Validate parameters before processing
+- **Documentation**: JSDoc comments for functions
+- **Formatting**: 2-space indentation
+- **Testing**: Write unit tests for all new functionality
+
+## Project Structure
+This MCP server integrates with Google Calendar, providing:
+- Express server with MCP endpoints (/mcp/definition, /mcp/execute)
+- Google OAuth2 authentication
+- Calendar operations (list, create, update, delete events)
+- Recurring events with RRULE support
+- Notifications and webhooks
+- Batch operations
+- SQLite token management
+- Conflict detection
+
+## Publishing Notes
+When publishing this package to a registry (npm, smithery, etc.):
+
+1. **Package Structure Changes**:
+   - Add `bin` entry in package.json to create an executable
+   - Create a CLI entrypoint that handles arguments and configuration
+   - Move hardcoded paths to environment variables or config files
+
+2. **Distribution Considerations**:
+   - Use scoped package name (e.g., `@org/mcp-google-calendar`)
+   - Add README instructions for global installation
+   - Update MCP configuration to use globally installed package
+
+3. **Claude Integration**:
+   - Command: Change from shell script to package name
+   - Args: Add appropriate flags for configuration
+   - Configuration: Use standard paths or environment variables
+
+4. **Development vs Production**:
+   - Maintain local development workflow with npm scripts
+   - Add production deployment documentation
+   - Consider containerization (Docker) for easier deployment