Ampform

_See all documentation for this version [here](https://ampform.rtfd.io/en/0.14.8)._

⚠️ API changes

- Renamed `unevaluated_expression()` decorator to `unevaluated()` (379)
- Arguments `z` and `angular_momentum` have swapped in `BlattWeisskopfSquared` -- `z` comes first (375)
- `n_events` argument is required in `BoostZMatrix`, `RotationYMatrix`, and `RotationZMatrix` classes (381)
- `UnevaluatedExpression` template and related functions are now deprecated (383)

⚠️ Enhancements and optimizations

- Add support for class attributes in `unevaluated` expression classes (375)
- Add support for default arguments in `unevaluated` expression classes (376)
- Add support to mark specific arguments to `unevaluated` classes as non-sympiable (380)

🐛 Bug fixes

- Sympify `unevaluated` instance attributes (374)

🔨 Maintenance

- Organize `unevaluated` test functions (377)
- Implement all expression classes of the AmpForm library with `unevaluated` (382)

🖱️ Developer Experience

- Show reasons for skipping tests when running `pytest` (378)

_The full changelog as commits can be found [here](https://github.com/ComPWA/ampform/compare/0.14.7...0.14.8)._

_See all documentation for this version [here](https://ampform.rtfd.io/en/0.14.7)._

✨ New features

- Implement `unevaluated_expression()` decorator (365)

📝 Documentation

- Add `CITATION.cff` (356)
- Add Lorentz boost example (352)
- Illustrate how to use `BoostMatrix` (353)
- Link to source code on GitHub with `linkcode` (371)

🔨 Maintenance

- Switch to Ruff as linter (354)
- Test AmpForm on Python 3.12 (366)

🖱️ Developer Experience

- Clean up Sphinx configuration (370)
- Define `docnblive` job in `tox.ini` (373)
- Enable language navigation and linting on Jupyter Lab (357 and 369)
- Link to source code on GitHub with `linkcode` (371)
- Remove `figure_formats = ["svg"]` statement (368)

_The full changelog as commits can be found [here](https://github.com/ComPWA/ampform/compare/0.14.6...0.14.7)._

_See all documentation for this version [here](https://ampform.rtfd.io/en/0.14.6)._

🔨 Maintenance

- Installation is now verified on Python 3.11 (339)
- Version limit has been removed from SymPy dependency (341)

📝 Documentation

- Improve sidebar of the website (344)
- Fix typos in `README.md` (348)

- 🖱️ Developer Experience

- GitHub workflows is now outsourced to [ComPWA/actions](https://github.com/ComPWA/actions) (#340)
- Log output of `sphinx-build` is now colored (343)

_The full changelog as commits can be found [here](https://github.com/ComPWA/ampform/compare/0.14.5...0.14.6)._

_See all documentation for this version [here](https://ampform.rtfd.io/en/0.14.5)._

🐛 Bug fixes

- `sympy.Indexed` is now accepted as key in `ParameterValues` (336)

🖱️ Developer Experience

- Implemented caching for GitHub Actions workflows (335)

_See all documentation for this version [here](https://ampform.rtfd.io/en/0.14.4)._

✨ New features

- Implemented [`perform_cached_doit()`](https://ampform.readthedocs.io/0.14.4/api/ampform.sympy.html#ampform.sympy.perform_cached_doit) (333)

🖱️ Developer Experience

- Fixed release drafter (331)

🐛 Bug fixes

* `HelicityModel.rename_symbols()` now works with scalar final state masses (328)
* `EnergyDependentWidth.subs()`/`.xreplace()` now works correctly takes care of the `phsp_factor` choice (330)