# Task 0.2.4: Create Configuration Files

## Metadata
- **Task ID**: 0.2.4
- **Title**: Create Configuration Files
- **Phase**: 0 - Project Setup & Foundation
- **Section**: 0.2 Configuration System
- **Status**: Pending
- **Priority**: High
- **Estimated Time**: 15 minutes
- **Dependencies**: 0.1.2

## Description
Create the baseline configuration YAML files that define the default configuration structure for the platform.

## Requirements
- Create `config/default.yaml` with baseline values
- Create `config/development.yaml` with development overrides
- Create `config/production.yaml` with production overrides
- Define configuration schema for all core services

## Implementation Steps
1. Create `config/default.yaml`:
   ```yaml
   environment: development
   server:
     port: 8080
     host: "0.0.0.0"
   database:
     driver: "postgres"
     dsn: ""
   logging:
     level: "info"
     format: "json"
   ```
2. Create `config/development.yaml`:
   - Override logging level to "debug"
   - Add development-specific settings
3. Create `config/production.yaml`:
   - Override logging level to "warn"
   - Add production-specific settings
4. Document configuration options

## Acceptance Criteria
- [ ] `config/default.yaml` exists with complete structure
- [ ] `config/development.yaml` exists
- [ ] `config/production.yaml` exists
- [ ] All configuration files are valid YAML
- [ ] Configuration structure is documented

## Related ADRs
- [ADR-0004: Configuration Management](../../adr/0004-configuration-management.md)

## Implementation Notes
- Use consistent indentation (2 spaces)
- Add comments for unclear configuration options
- Use environment variables for sensitive values (DSN, secrets)
- Consider adding validation schema later

## Testing
```bash
# Validate YAML syntax
yamllint config/*.yaml
# or
python3 -c "import yaml; yaml.safe_load(open('config/default.yaml'))"
```