vdjtools 5.1.0

Table PCA models now preserve explained-variance ratios when fitted, saved and loaded. Validation checks their shape, finite nonnegative values and total; older saved rotations remain loadable without this optional field.

The raw-feature guide clarifies reference selection and coordinate compatibility. Raw feature and signature representations remain unchanged. Fitted reference PCA bundles are separate outputs and are not included in the package or release assets.

Validation: all six CI jobs passed, including the Linux heavy tier; focused projection tests and warning-free documentation build passed. Rebuilt wheel and source distribution passed inventory checks and isolated installation/native-import verification.