Compatibility

weevr is designed to run within the Microsoft Fabric runtime. The table below lists the tested and supported versions for each dependency.

Runtime matrix

Component	Version	Notes
Python	3.11	Pinned via .python-version
PySpark	3.5.x	Bundled with Fabric Runtime 1.3
Delta Lake	3.2.x	Bundled with Fabric Runtime 1.3
Microsoft Fabric Runtime	1.3	Target deployment environment
Pydantic	2.x	Configuration validation

Python version policy

weevr targets Python 3.11 exclusively to match the Fabric Runtime 1.3 interpreter. This version is enforced by the .python-version file at the repository root.

Spark and Delta compatibility

PySpark and Delta Lake versions are determined by the Fabric Runtime and are not independently selectable. weevr is tested against the versions bundled with Runtime 1.3. Running against other Spark or Delta versions is not officially supported.

Development dependencies

Development tooling (linting, testing, type checking) is managed via uv and recorded in pyproject.toml. These tools are not required at runtime.

Tool	Purpose
uv	Package management and virtual environments
Ruff	Linting and formatting
Pyright	Static type checking
pytest	Test execution
pytest-cov	Coverage reporting