PyPI
Both packages are published to PyPI separately, each with its own version (following its vendored upstream release) and its own changelog:
| Package | Install | PyPI |
|---|---|---|
| pyside6-scintilla | pip install pyside6-scintilla |
pypi.org/project/pyside6-scintilla  |
| lexilla | pip install lexilla |
pypi.org/project/lexilla  |
pyside6-scintilla pins one PySide6 minor per release, and pip picks the
release matching your PySide6. lexilla has no runtime dependencies (its
lexilla.pyside6_scintilla glue uses pyside6-scintilla when it's installed).