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CHANGELOG.md

@@ -7,12 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-### 🚨 Breaking Changes
-* **🚨 BREAKING**: Removed `kind` in favor of `style` in plotting functions
-* **🚨 BREAKING**: Renamed `TimeSeries.active_data` to `TimeSeries.selected_data`
-* **🚨 BREAKING**: `CalculationResults.flow_system` now returns the restored FlowSystem instead of the `xr.Dataset`. The data can be found under `flow_system_data`
+### 💥 Breaking Changes
+* **💥 BREAKING**: Removed `kind` in favor of `style` in plotting functions
+* **💥 BREAKING**: Renamed `TimeSeries.active_data` to `TimeSeries.selected_data`
+* **💥 BREAKING**: `CalculationResults.flow_system` now returns the restored FlowSystem instead of the `xr.Dataset`. The data can be found under `flow_system_data`
 
-### Added
+### ✨ Added
 #### Major Features
 * **Scenarios**: Model uncertainties or **Multi-Period Transformations**
   * Scenarios are passed to a `FlowSystem` with `scenario_weight` multipliers
@@ -21,7 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * **Balanced Storage**: Storage charging and discharging sizes can now be forced to be equal when optimizing by choosing `balanced=True`
 
 #### Results & Analysis
-* **New dedicated `FlowResults` class
+* **New dedicated `FlowResults` class**
   * Dedicated xr.DataArrays combining all **flow_rates**, **flow_hours**, or **sizes** of flows
   * Use `effects_per_component()` to retrieve all effects results for every Component, including indirect effects (ElementA → CO2 → Costs)
 
@@ -37,20 +37,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Added `grouped_bar` plotting style
 * Changed default legend location in plots (now on the right side)
 
-### Deprecated
+### 🗑️ Deprecated
 * `Calculation.active_timesteps` → Use `Calculation.selected_timesteps` instead
 * ⚠️ Loading Results from prior versions will raise warnings due to FlowResults incompatibility. Some new features cannot be used.
 
-### Fixed
+### 🐛 Fixed
 * Fixed formatting issues in YAML model documentation (line breaks)
 
 ### Known Issues
 * Scenarios are not yet supported in `AggregatedCalculation` and `SegmentedCalculation`
 
 ## [2.1.2] - 2025-06-14
 
-### Fixed
-* **🐛 Critical Fix**: Storage losses per hour calculation corrected (thanks @brokenwings01)
+### 🐛 Fixed
+* **Critical Fix**: Storage losses per hour calculation corrected (thanks @brokenwings01)
   * **Impact**: Affects modeling of large losses and long timesteps
   * **Old**: `c(t_i) · (1-ċ_rel,loss(t_i)) · Δt_i`
   * **Correct**: `c(t_i) · (1-ċ_rel,loss(t_i))^Δt_i`
@@ -60,51 +60,51 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [2.1.1] - 2025-05-08
 
-### Fixed
+### 🐛 Fixed
 * Fixed `_ElementResults.constraints` returning variables instead of constraints
 
 ### Changed
 * Improved docstrings and tests
 
 ## [2.1.0] - 2025-04-11
 
-### 🚨 Breaking Changes
-* **🚨 BREAKING**: Restructured On/Off state modeling for Flows and Components
-  * Variable renaming: `...|consecutive_on_hours` → `...|ConsecutiveOn|hours`
-  * Variable renaming: `...|consecutive_off_hours` → `...|ConsecutiveOff|hours`
-  * Constraint renaming: `...|consecutive_on_hours_con1` → `...|ConsecutiveOn|con1`
+### 💥 Breaking Changes
+* **💥 BREAKING**: Restructured On/Off state modeling for Flows and Components
+  * **♻️ Variable renaming**: `...|consecutive_on_hours` → `...|ConsecutiveOn|hours`
+  * **♻️ Variable renaming**: `...|consecutive_off_hours` → `...|ConsecutiveOff|hours`
+  * **♻️ Constraint renaming**: `...|consecutive_on_hours_con1` → `...|ConsecutiveOn|con1`
   * Similar pattern applied to all consecutive on/off constraints
 
-### Added
+### ✨ Added
 * **Python 3.13 support**
 * Enhanced testing infrastructure leveraging linopy's testing framework
 * Logger warnings for `relative_minimum` usage without `on_off_parameters` in Flow
 
-### Fixed
+### 🐛 Fixed
 * Fixed `flow_rate` lower bound issues with optional investments without OnOffParameters
 * Fixed divest effects functionality
 * Added missing lower bounds of 0 to unbounded variables (numerical stability improvement)
 
 ## [2.0.1] - 2025-04-10
 
-### Fixed
+### 🐛 Fixed
 * **Windows Compatibility**: Replace "|" with "__" in figure filenames
 * Fixed load factor functionality without InvestmentParameters
 
-### Added
+### ✨ Added
 * Logger warning for `relative_minimum` usage without `on_off_parameters` in Flow
 
 ## [2.0.0] - 2025-03-29
 
-### 🚨 Breaking Changes
-* **🚨 BREAKING**: Complete migration from Pyomo to Linopy optimization framework
-* **🚨 BREAKING**: Redesigned data handling using xarray.Dataset throughout
-* **🚨 BREAKING**: Framework renamed from flixOpt to flixopt (`import flixopt as fx`)
-* **🚨 BREAKING**: Complete redesign of Results handling with new `CalculationResults` class
-* **🚨 BREAKING**: Removed Pyomo dependency
-* **🚨 BREAKING**: Removed Period concepts (simplified to timesteps)
+### 💥 Breaking Changes
+* **💥 BREAKING**: Complete migration from Pyomo to Linopy optimization framework
+* **💥 BREAKING**: Redesigned data handling using xarray.Dataset throughout
+* **💥 BREAKING**: Framework renamed from flixOpt to flixopt (`import flixopt as fx`)
+* **💥 BREAKING**: Complete redesign of Results handling with new `CalculationResults` class
+* **🔥 BREAKING**: Removed Pyomo dependency
+* **🔥 BREAKING**: Removed Period concepts (simplified to timesteps)
 
-### Added
+### ✨ Added
 #### Major Features
 * **Full model serialization**: Save and restore unsolved Models
 * **Enhanced model documentation**: YAML export with human-readable mathematical formulations
@@ -120,11 +120,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * `to_netcdf/from_netcdf` methods for FlowSystem and core components
 * Google Style Docstrings throughout codebase
 
-### Fixed
+### 🐛 Fixed
 * **Improved infeasible model detection and reporting**
 * Enhanced time series management and serialization
 * Reduced file sizes through better compression
 
-### Removed
-- **🚨 BREAKING**: Pyomo dependency (replaced by linopy)
-- **🚨 BREAKING**: Period concepts in time management (simplified to timesteps)
+### 🔥 Removed
+* **BREAKING**: Pyomo dependency (replaced by linopy)
+* **BREAKING**: Period concepts in time management (simplified to timesteps)