Release v0.0.19

Added

• SECURITY.md - Security policy and vulnerability reporting guidelines
• CONTRIBUTING.md - Comprehensive contribution guidelines and development setup
• PR template - Structured pull request template
• Issue templates - Bug report and feature request templates
• Dependabot - Automated dependency updates for pip and GitHub Actions
• Link checker workflow - Automated markdown link validation
• Migration guide - Instructions for users migrating from original repository
• Comparison table - "Why This Fork?" feature comparison

Changed

• Updated documentation to reflect active fork status
• Updated repository URLs in manifest.json to Tsopic/nordpool
• Updated codeowner from @Hellowlol to @Tsopic
• Added HACS installation instructions for custom repository
• Dynamic version badge instead of hardcoded version
• Removed PayPal donation link
• Updated @Hellowlol GitHub links to @Tsopic in attribution

Fixed

• Fixed CHANGELOG links for v0.0.17 (now points to original repository)
• Configured link checker to ignore false positive 403 errors

What's Changed

• Update documentation to reflect active fork status by @Tsopic in #3

Full Changelog: v0.0.18...v0.0.19

Release v0.0.18

Added

• 15-minute period support - Integration now supports Nord Pool's 15-minute interval pricing (transitioned from hourly on October 1, 2025)
• Automatic period detection - Sensor automatically detects period type (15min or hourly) from API response
• period_type configuration - New optional configuration parameter to set period preference (defaults to 15min)
• period_type sensor attribute - New attribute showing the detected period type
• Adaptive calculations - Peak/off-peak calculations now adapt dynamically to period granularity (24 hourly vs 96 15-minute periods)

Changed

• Update frequency - Callbacks now fire every 15 minutes (at :00, :15, :30, :45) instead of hourly for more timely price updates
• Default period type - New installations default to 15-minute periods
• Buy Me a Coffee link - Updated to new URL

Fixed

• Time rounding functions now support both hourly and 15-minute boundaries
• Peak/off-peak calculations correctly handle variable period counts
• Tomorrow validation adapts to expected period count (23+ for hourly, 92+ for 15-minute)

Technical

• Enhanced start_of() and end_of() functions in misc.py with 15-minute support
• Added PERIOD_HOURLY and PERIOD_15MIN constants in const.py
• Implemented period length detection: (end - start).total_seconds() / 60
• Updated extract_attrs() to calculate periods_per_hour = len(data) // 24

Backward Compatibility

• ✅ Fully backward compatible with existing configurations
• ✅ Handles both hourly and 15-minute API responses
• ✅ No breaking changes to sensor attributes or behavior

What's Changed

• Add 15-minute period support for Nord Pool prices by @Tsopic in #1

New Contributors

• @Tsopic made their first contribution in #1

Full Changelog: https://github.com/Tsopic/nordpool/commits/v0.0.18