diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..dbe034e
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,358 @@
+# Contributing to CalDAV Calendar Synchronizer
+
+Thank you for your interest in contributing to the CalDAV Calendar Synchronizer! This document provides guidelines and information for contributors.
+
+## Getting Started
+
+### Prerequisites
+
+- Rust 1.70 or newer
+- Git
+- Basic familiarity with CalDAV protocol
+- Understanding of async/await in Rust
+
+### Development Setup
+
+1. **Fork and Clone**
+   ```bash
+   # Fork the repository on your Forgejo instance
+   git clone ssh://git@gitea.soliverez.com.ar/YOUR_USERNAME/caldavpuller.git
+   cd caldavpuller
+   
+   # Add upstream remote
+   git remote add upstream ssh://git@gitea.soliverez.com.ar/alvaro/caldavpuller.git
+   ```
+
+2. **Install Development Tools**
+   ```bash
+   # Install Rust toolchain
+   rustup update stable
+   rustup component add rustfmt clippy rust-analyzer
+   
+   # Verify installation
+   cargo --version
+   rustfmt --version
+   clippy --version
+   ```
+
+3. **Build and Test**
+   ```bash
+   # Build the project
+   cargo build
+   
+   # Run tests
+   cargo test
+   
+   # Check formatting
+   cargo fmt --check
+   
+   # Run linter
+   cargo clippy -- -D warnings
+   ```
+
+## Development Workflow
+
+### 1. **Create a Branch**
+
+```bash
+# Sync with upstream
+git fetch upstream
+git checkout main
+git merge upstream/main
+
+# Create feature branch
+git checkout -b feature/your-feature-name
+# or
+git checkout -b fix/your-fix-name
+```
+
+### 2. **Make Changes**
+
+- Follow the existing code style
+- Add tests for new functionality
+- Update documentation as needed
+- Ensure all tests pass
+
+### 3. **Commit Changes**
+
+Use clear, descriptive commit messages:
+
+```bash
+# Good commit message
+git commit -m "feat: Add support for calendar color filtering
+
+- Add color field to CalendarInfo struct
+- Implement color-based filtering in CalendarFilter
+- Add configuration option for color preferences
+- Add unit tests for color filtering logic"
+
+# Another good example
+git commit -m "fix: Handle timezone parsing errors gracefully
+
+- Add proper error handling for unknown timezone identifiers
+- Return meaningful error messages to users
+- Add integration tests for timezone edge cases"
+```
+
+### 4. **Submit Pull Request**
+
+```bash
+# Push to your fork
+git push origin feature/your-feature-name
+
+# Create pull request on Forgejo
+# Provide clear description of changes and testing done
+```
+
+## Code Style and Standards
+
+### 1. **Formatting**
+
+Use `rustfmt` with default settings:
+
+```bash
+cargo fmt
+```
+
+### 2. **Linting**
+
+All code must pass `clippy` without warnings:
+
+```bash
+cargo clippy -- -D warnings
+```
+
+### 3. **Documentation**
+
+- Document all public APIs with `///` comments
+- Include examples for complex functionality
+- Update README and other documentation as needed
+
+```rust
+/// Filters calendars based on user-defined criteria.
+///
+/// # Examples
+///
+/// ```
+/// use caldav_sync::CalendarFilter;
+///
+/// let filter = CalendarFilter::new()
+///     .with_selected_calendars(vec!["Work".to_string()]);
+/// 
+/// assert!(filter.should_import_calendar("Work"));
+/// assert!(!filter.should_import_calendar("Personal"));
+/// ```
+pub struct CalendarFilter {
+    // ...
+}
+```
+
+### 4. **Error Handling**
+
+- Use `Result<T, CalDavError>` for fallible operations
+- Provide meaningful error context
+- Handle errors gracefully at the UI layer
+
+```rust
+pub async fn sync_calendars(&mut self) -> CalDavResult<SyncStats> {
+    let calendars = self.discover_calendars().await
+        .context("Failed to discover calendars")?;
+    
+    // ... rest of implementation
+}
+```
+
+### 5. **Testing**
+
+Write comprehensive tests:
+
+```rust
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[tokio::test]
+    async fn test_calendar_filtering() {
+        let filter = CalendarFilter::new()
+            .with_selected_calendars(vec!["Work".to_string()]);
+        
+        assert!(filter.should_import_calendar("Work"));
+        assert!(!filter.should_import_calendar("Personal"));
+    }
+}
+```
+
+## Testing
+
+### 1. **Unit Tests**
+
+Test individual components in isolation:
+
+```bash
+cargo test --lib
+```
+
+### 2. **Integration Tests**
+
+Test component interactions:
+
+```bash
+cargo test --test integration_tests
+```
+
+### 3. **Manual Testing**
+
+Test with real CalDAV servers:
+
+```bash
+# Build and run with debug logging
+cargo build
+./target/debug/caldav-sync --debug --list-events
+```
+
+### 4. **Test Coverage**
+
+Aim for high test coverage, especially for:
+- Configuration parsing
+- Error handling paths
+- Calendar filtering logic
+- Timezone conversions
+
+## Types of Contributions
+
+### 1. **Bug Fixes**
+
+- Check existing issues for bug reports
+- Create minimal reproduction case
+- Add tests that fail before the fix
+- Fix the issue and ensure tests pass
+
+### 2. **New Features**
+
+- Open issue for discussion first
+- Design the feature interface
+- Implement with tests
+- Update documentation
+
+### 3. **Documentation**
+
+- Improve README and guides
+- Add code examples
+- Fix typos and clarity issues
+- Translate documentation if possible
+
+### 4. **Performance Improvements**
+
+- Profile existing code
+- Identify bottlenecks
+- Implement optimizations
+- Add benchmarks for verification
+
+## Areas Needing Help
+
+### 1. **Enhanced CalDAV Support**
+
+- Better support for CalDAV extensions
+- Handling of recurring events
+- Support for attachments and attendees
+
+### 2. **User Experience**
+
+- Interactive configuration wizard
+- Progress indicators for long operations
+- Better error messages and recovery
+
+### 3. **Testing Infrastructure**
+
+- Mock CalDAV server for testing
+- Automated testing in CI/CD
+- Performance benchmarks
+
+### 4. **Documentation**
+
+- User guides for different platforms
+- API documentation
+- Troubleshooting guides
+
+## Code Review Process
+
+### 1. **Self-Review**
+
+Before submitting, review your own changes:
+- Code follows project style
+- Tests are comprehensive
+- Documentation is updated
+- No debug code or TODOs left
+
+### 2. **Review Criteria**
+
+Maintainers will review for:
+- Correctness and safety
+- Performance implications
+- User experience impact
+- Code maintainability
+
+### 3. **Feedback**
+
+Be prepared to:
+- Answer questions about your changes
+- Make requested modifications
+- Discuss alternative approaches
+- Update tests based on feedback
+
+## Release Process
+
+### 1. **Version Management**
+
+- Follow semantic versioning (MAJOR.MINOR.PATCH)
+- Update version in `Cargo.toml`
+- Create git tag for releases
+
+### 2. **Changelog**
+
+Maintain `CHANGELOG.md` with:
+- New features
+- Bug fixes
+- Breaking changes
+- Migration notes
+
+### 3. **Release Checklist**
+
+- [ ] All tests pass
+- [ ] Documentation updated
+- [ ] Version numbers updated
+- [ ] Changelog updated
+- [ ] Release tag created
+- [ ] Release artifacts built
+
+## Support and Communication
+
+### 1. **Issues and Questions**
+
+- Use GitHub issues for bug reports and feature requests
+- Check existing issues before creating new ones
+- Provide clear, reproducible examples
+
+### 2. **Discussions**
+
+- Use discussions for general questions
+- Share ideas and suggestions
+- Ask for help with development
+
+### 3. **Code of Conduct**
+
+Be respectful and constructive:
+- Welcome newcomers and help them learn
+- Assume good faith in interactions
+- Focus on what is best for the community
+- Show empathy towards other community members
+
+## Recognition
+
+Contributors are recognized in:
+- `CONTRIBUTORS.md` file
+- Release notes
+- Git commit history
+- Project documentation
+
+Thank you for contributing to the CalDAV Calendar Synchronizer! Your contributions help make this project better for everyone.
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
new file mode 100644
index 0000000..925d4d5
--- /dev/null
+++ b/CONTRIBUTORS.md
@@ -0,0 +1,17 @@
+# Contributors
+
+This project exists thanks to all the people who contribute.
+
+## Lead Developer
+
+- **Alvaro Soliverez** - *Project creator and maintainer*
+
+## Development Setup
+
+For information on how to contribute to this project, please see [CONTRIBUTING.md](CONTRIBUTING.md).
+
+## Acknowledgments
+
+- The Rust community for excellent tools and libraries
+- The CalDAV protocol developers and maintainers
+- All users who provide feedback and bug reports
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
new file mode 100644
index 0000000..a96fb60
--- /dev/null
+++ b/DEVELOPMENT.md
@@ -0,0 +1,416 @@
+# Development Guide
+
+This document provides comprehensive information about the design, architecture, and development of the CalDAV Calendar Synchronizer.
+
+## Architecture Overview
+
+The application is built with a modular architecture using Rust's strong type system and async capabilities.
+
+### Core Components
+
+#### 1. **Configuration System** (`src/config.rs`)
+- **Purpose**: Manage configuration from files, environment variables, and CLI arguments
+- **Features**: 
+  - TOML-based configuration files
+  - Environment variable support
+  - Command-line argument overrides
+  - Configuration validation
+- **Key Types**: `Config`, `ServerConfig`, `CalendarConfig`, `SyncConfig`
+
+#### 2. **CalDAV Client** (`src/caldav_client.rs`)
+- **Purpose**: Handle CalDAV protocol operations with Zoho and Nextcloud
+- **Features**:
+  - HTTP client with authentication
+  - Calendar discovery via PROPFIND
+  - Event retrieval via REPORT requests
+  - Event creation via PUT requests
+- **Key Types**: `CalDavClient`, `CalendarInfo`, `CalDavEventInfo`
+
+#### 3. **Event Model** (`src/event.rs`)
+- **Purpose**: Represent calendar events and handle parsing
+- **Features**:
+  - iCalendar data parsing
+  - Timezone-aware datetime handling
+  - Event filtering and validation
+- **Key Types**: `Event`, `EventBuilder`, `EventFilter`
+
+#### 4. **Timezone Handler** (`src/timezone.rs`)
+- **Purpose**: Manage timezone conversions and datetime operations
+- **Features**:
+  - Convert between different timezones
+  - Parse timezone information from iCalendar data
+  - Handle DST transitions
+- **Key Types**: `TimezoneHandler`, `TimeZoneInfo`
+
+#### 5. **Calendar Filter** (`src/calendar_filter.rs`)
+- **Purpose**: Filter calendars and events based on user criteria
+- **Features**:
+  - Calendar name filtering
+  - Regex pattern matching
+  - Event date range filtering
+- **Key Types**: `CalendarFilter`, `FilterRule`, `EventFilter`
+
+#### 6. **Sync Engine** (`src/sync.rs`)
+- **Purpose**: Coordinate the synchronization process
+- **Features**:
+  - Pull events from Zoho
+  - Push events to Nextcloud
+  - Conflict resolution
+  - Progress tracking
+- **Key Types**: `SyncEngine`, `SyncResult`, `SyncStats`
+
+#### 7. **Error Handling** (`src/error.rs`)
+- **Purpose**: Comprehensive error management
+- **Features**:
+  - Custom error types
+  - Error context and chaining
+  - User-friendly error messages
+- **Key Types**: `CalDavError`, `CalDavResult`
+
+## Design Decisions
+
+### 1. **Selective Calendar Import**
+The application allows users to select specific Zoho calendars to import from, consolidating all events into a single Nextcloud calendar. This design choice:
+
+- **Reduces complexity** compared to bidirectional sync
+- **Provides clear data flow** (Zoho → Nextcloud)
+- **Minimizes sync conflicts**
+- **Matches user requirements** exactly
+
+### 2. **Timezone Handling**
+All events are converted to UTC internally for consistency, while preserving original timezone information:
+
+```rust
+pub struct Event {
+    pub id: String,
+    pub summary: String,
+    pub start: DateTime<Utc>,
+    pub end: DateTime<Utc>,
+    pub original_timezone: Option<String>,
+    pub source_calendar: String,
+}
+```
+
+### 3. **Configuration Hierarchy**
+Configuration is loaded in priority order:
+
+1. **Command line arguments** (highest priority)
+2. **User config file** (`config/config.toml`)
+3. **Default config file** (`config/default.toml`)
+4. **Environment variables**
+5. **Hardcoded defaults** (lowest priority)
+
+### 4. **Error Handling Strategy**
+Uses `thiserror` for custom error types and `anyhow` for error propagation:
+
+```rust
+#[derive(Error, Debug)]
+pub enum CalDavError {
+    #[error("HTTP error: {0}")]
+    Http(#[from] reqwest::Error),
+    
+    #[error("Configuration error: {0}")]
+    Config(String),
+    
+    #[error("Calendar not found: {0}")]
+    CalendarNotFound(String),
+    
+    // ... more error variants
+}
+```
+
+## Data Flow
+
+### 1. **Application Startup**
+```
+1. Load CLI arguments
+2. Load configuration files
+3. Apply environment variables
+4. Validate configuration
+5. Initialize logging
+6. Create CalDAV clients
+```
+
+### 2. **Calendar Discovery**
+```
+1. Connect to Zoho CalDAV server
+2. Authenticate with app password
+3. Send PROPFIND request to discover calendars
+4. Parse calendar list and metadata
+5. Apply user filters to select calendars
+```
+
+### 3. **Event Synchronization**
+```
+1. Query selected Zoho calendars for events (next week)
+2. Parse iCalendar data into Event objects
+3. Convert timestamps to UTC with timezone preservation
+4. Apply event filters (duration, status, patterns)
+5. Connect to Nextcloud CalDAV server
+6. Create target calendar if needed
+7. Upload events to Nextcloud calendar
+8. Report sync statistics
+```
+
+## Key Algorithms
+
+### 1. **Calendar Filtering**
+```rust
+impl CalendarFilter {
+    pub fn should_import_calendar(&self, calendar_name: &str) -> bool {
+        // Check exact matches
+        if self.selected_names.contains(&calendar_name.to_string()) {
+            return true;
+        }
+        
+        // Check regex patterns
+        for pattern in &self.regex_patterns {
+            if pattern.is_match(calendar_name) {
+                return true;
+            }
+        }
+        
+        false
+    }
+}
+```
+
+### 2. **Timezone Conversion**
+```rust
+impl TimezoneHandler {
+    pub fn convert_to_utc(&self, dt: DateTime<FixedOffset>, timezone: &str) -> CalDavResult<DateTime<Utc>> {
+        let tz = self.get_timezone(timezone)?;
+        let local_dt = dt.with_timezone(&tz);
+        Ok(local_dt.with_timezone(&Utc))
+    }
+}
+```
+
+### 3. **Event Processing**
+```rust
+impl SyncEngine {
+    pub async fn sync_calendar(&mut self, calendar: &CalendarInfo) -> CalDavResult<SyncResult> {
+        // 1. Fetch events from Zoho
+        let zoho_events = self.fetch_zoho_events(calendar).await?;
+        
+        // 2. Filter and process events
+        let processed_events = self.process_events(zoho_events)?;
+        
+        // 3. Upload to Nextcloud
+        let upload_results = self.upload_to_nextcloud(processed_events).await?;
+        
+        // 4. Return sync statistics
+        Ok(SyncResult::from_upload_results(upload_results))
+    }
+}
+```
+
+## Configuration Schema
+
+### Complete Configuration Structure
+```toml
+# Zoho Configuration (Source)
+[zoho]
+server_url = "https://caldav.zoho.com/caldav"
+username = "your-zoho-email@domain.com"
+password = "your-zoho-app-password"
+selected_calendars = ["Work Calendar", "Personal Calendar"]
+
+# Nextcloud Configuration (Target)
+[nextcloud]
+server_url = "https://your-nextcloud-domain.com"
+username = "your-nextcloud-username"
+password = "your-nextcloud-app-password"
+target_calendar = "Imported-Zoho-Events"
+create_if_missing = true
+
+# General Settings
+[server]
+timeout = 30
+
+[calendar]
+color = "#3174ad"
+timezone = "UTC"
+
+[sync]
+interval = 300
+sync_on_startup = true
+weeks_ahead = 1
+dry_run = false
+
+# Optional Filtering
+[filters]
+min_duration_minutes = 5
+max_duration_hours = 24
+exclude_patterns = ["Cancelled:", "BLOCKED"]
+include_status = ["confirmed", "tentative"]
+exclude_status = ["cancelled"]
+```
+
+## Dependencies and External Libraries
+
+### Core Dependencies
+```toml
+[dependencies]
+tokio = { version = "1.0", features = ["full"] }          # Async runtime
+reqwest = { version = "0.11", features = ["json", "xml"] } # HTTP client
+serde = { version = "1.0", features = ["derive"] }         # Serialization
+chrono = { version = "0.4", features = ["serde"] }         # Date/time
+chrono-tz = "0.8"                                          # Timezone support
+quick-xml = "0.28"                                         # XML parsing
+thiserror = "1.0"                                          # Error handling
+anyhow = "1.0"                                             # Error propagation
+config = "0.13"                                            # Configuration
+clap = { version = "4.0", features = ["derive"] }          # CLI
+tracing = "0.1"                                            # Logging
+tracing-subscriber = "0.3"                                 # Log formatting
+toml = "0.8"                                               # TOML parsing
+```
+
+### Optional Dependencies for Future Features
+```toml
+# For enhanced XML handling
+serde_xml_rs = "0.6"
+
+# For better HTTP client customization
+http = "0.2"
+
+# For async file operations
+tokio-util = "0.7"
+
+# For better error formatting
+color-eyre = "0.6"
+```
+
+## Testing Strategy
+
+### 1. **Unit Tests**
+- Individual module functionality
+- Configuration parsing and validation
+- Event parsing and timezone conversion
+- Error handling paths
+
+### 2. **Integration Tests**
+- End-to-end CalDAV operations
+- Configuration loading from files
+- CLI argument processing
+- HTTP client behavior
+
+### 3. **Mock Testing**
+- Mock CalDAV server responses
+- Test error conditions without real servers
+- Validate retry logic and timeout handling
+
+## Performance Considerations
+
+### 1. **Async Operations**
+All network operations are async to prevent blocking:
+```rust
+pub async fn fetch_events(&self, calendar: &CalendarInfo) -> CalDavResult<Vec<Event>> {
+    let response = self.client
+        .request(reqwest::Method::REPORT, &calendar.url)
+        .body(report_body)
+        .send()
+        .await?;
+    
+    // Process response...
+}
+```
+
+### 2. **Memory Management**
+- Stream processing for large calendar responses
+- Efficient string handling with `Cow<str>` where appropriate
+- Clear lifecycle management for HTTP connections
+
+### 3. **Configuration Caching**
+- Cache parsed timezone information
+- Reuse HTTP connections where possible
+- Validate configuration once at startup
+
+## Security Considerations
+
+### 1. **Authentication**
+- Support for app-specific passwords only
+- Never log authentication credentials
+- Secure storage of sensitive configuration
+
+### 2. **Network Security**
+- Enforce HTTPS by default
+- SSL certificate validation
+- Custom CA certificate support
+
+### 3. **Data Privacy**
+- Minimal data collection (only required event fields)
+- Optional debug logging with sensitive data filtering
+- Clear data retention policies
+
+## Future Enhancements
+
+### 1. **Enhanced Filtering**
+- Advanced regex patterns
+- Calendar color-based filtering
+- Attendee-based filtering
+
+### 2. **Bidirectional Sync**
+- Two-way synchronization with conflict resolution
+- Event modification tracking
+- Deletion synchronization
+
+### 3. **Performance Optimizations**
+- Parallel calendar processing
+- Incremental sync with change detection
+- Local caching and offline mode
+
+### 4. **User Experience**
+- Interactive configuration wizard
+- Web-based status dashboard
+- Real-time sync notifications
+
+## Build and Development
+
+### 1. **Development Setup**
+```bash
+# Clone repository
+git clone ssh://git@gitea.soliverez.com.ar/alvaro/caldavpuller.git
+cd caldavpuller
+
+# Install Rust toolchain
+rustup update stable
+rustup component add rustfmt clippy
+
+# Build in development mode
+cargo build
+
+# Run tests
+cargo test
+
+# Check formatting
+cargo fmt --check
+
+# Run linter
+cargo clippy -- -D warnings
+```
+
+### 2. **Release Build**
+```bash
+# Build optimized release
+cargo build --release
+
+# Create distribution archive
+tar -czf caldav-sync-${VERSION}-${TARGET}.tar.gz \
+    -C target/release caldav-sync \
+    -C ../config example.toml \
+    -C .. README.md LICENSE
+```
+
+### 3. **Testing with Mock Servers**
+For testing without real CalDAV servers, use the mock server setup:
+```bash
+# Start mock CalDAV server
+cargo run --bin mock-server
+
+# Run integration tests against mock server
+cargo test --test integration_tests
+```
+
+This architecture provides a solid foundation for the CalDAV synchronization tool while maintaining flexibility for future enhancements.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..b8abd7e
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Alvaro Soliverez
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
index df228c3..6f29bd8 100644
--- a/README.md
+++ b/README.md
@@ -14,18 +14,18 @@ A Rust-based command-line tool that synchronizes calendar events between Zoho Ca
 
 ## Quick Start
 
-### 1. Prerequisites
+### Prerequisites
 
 - Rust 1.70+ (for building from source)
 - Zoho account with CalDAV access
 - Nextcloud instance with CalDAV enabled
 - App-specific passwords for both services (recommended)
 
-### 2. Installation
+### Installation
 
 ```bash
 # Clone the repository
-git clone <repository-url>
+git clone ssh://git@gitea.soliverez.com.ar/alvaro/caldavpuller.git
 cd caldavpuller
 
 # Build the project
@@ -34,7 +34,7 @@ cargo build --release
 # The binary will be at target/release/caldav-sync
 ```
 
-### 3. Configuration
+### Configuration
 
 Copy the example configuration file:
 
@@ -63,7 +63,7 @@ target_calendar = "Imported-Zoho-Events"
 create_if_missing = true
 ```
 
-### 4. First Run
+### First Run
 
 Test the configuration with a dry run:
 
@@ -77,35 +77,6 @@ Perform a one-time sync:
 ./target/release/caldav-sync --once
 ```
 
-## Configuration Details
-
-### Zoho Setup
-
-1. **Enable CalDAV in Zoho**:
-   - Go to Zoho Mail Settings → CalDAV
-   - Enable CalDAV access
-   - Generate an app-specific password
-
-2. **Find Calendar Names**:
-   ```bash
-   ./target/release/caldav-sync --list-events --debug
-   ```
-   This will show all available calendars.
-
-### Nextcloud Setup
-
-1. **Enable CalDAV**:
-   - Usually enabled by default
-   - Access at `https://your-domain.com/remote.php/dav/`
-
-2. **Generate App Password**:
-   - Go to Settings → Security → App passwords
-   - Create a new app password for the sync tool
-
-3. **Target Calendar**:
-   - The tool can automatically create the target calendar
-   - Or create it manually in Nextcloud first
-
 ## Usage
 
 ### Command Line Options
@@ -149,36 +120,7 @@ Options:
    caldav-sync --username "user@example.com" --password "app-password" --once
    ```
 
-## Configuration Reference
-
-### Complete Configuration Example
-
-```toml
-[server]
-url = "https://caldav.zoho.com/caldav"
-username = "your-email@domain.com"
-password = "your-app-password"
-timeout = 30
-
-[calendar]
-name = "Work Calendar"
-color = "#4285F4"
-
-[sync]
-sync_interval = 300
-sync_on_startup = true
-weeks_ahead = 1
-dry_run = false
-
-[filters]
-exclude_patterns = ["Cancelled:", "BLOCKED"]
-min_duration_minutes = 5
-max_duration_hours = 24
-
-[logging]
-level = "info"
-file = "caldav-sync.log"
-```
+## Configuration
 
 ### Environment Variables
 
@@ -193,6 +135,10 @@ export CALDAV_CALENDAR="Work Calendar"
 ./target/release/caldav-sync
 ```
 
+### Complete Configuration Example
+
+See `config/example.toml` for a comprehensive configuration example with all available options.
+
 ## Security Considerations
 
 1. **Use App Passwords**: Never use your main account password
@@ -233,65 +179,11 @@ caldav-sync --debug --list-events
 
 This will show detailed HTTP requests, responses, and processing steps.
 
-## Development
+## More Information
 
-### Building from Source
-
-```bash
-# Clone the repository
-git clone <repository-url>
-cd caldavpuller
-
-# Build in debug mode
-cargo build
-
-# Build in release mode
-cargo build --release
-
-# Run tests
-cargo test
-
-# Check code formatting
-cargo fmt --check
-
-# Run linter
-cargo clippy
-```
-
-### Project Structure
-
-```
-caldavpuller/
-├── src/
-│   ├── main.rs              # CLI interface and entry point
-│   ├── lib.rs               # Library interface
-│   ├── config.rs            # Configuration management
-│   ├── caldav_client.rs     # CalDAV HTTP client
-│   ├── event.rs             # Event data structures
-│   ├── timezone.rs          # Timezone handling
-│   ├── calendar_filter.rs   # Calendar filtering logic
-│   ├── sync.rs              # Synchronization engine
-│   └── error.rs             # Error types and handling
-├── config/
-│   ├── default.toml         # Default configuration
-│   └── example.toml         # Example configuration
-├── tests/
-│   └── integration_tests.rs # Integration tests
-├── Cargo.toml               # Rust project configuration
-└── README.md                # This file
-```
-
-## Contributing
-
-1. Fork the repository
-2. Create a feature branch
-3. Make your changes
-4. Add tests if applicable
-5. Submit a pull request
-
-## License
-
-This project is licensed under the MIT License - see the LICENSE file for details.
+- **Development & Design**: See [DEVELOPMENT.md](DEVELOPMENT.md)
+- **Contributing**: See [CONTRIBUTING.md](CONTRIBUTING.md)
+- **License**: See [LICENSE](LICENSE)
 
 ## Support