---

name: legacy-factories description: "Routes legacy scikit-plot factory-injection and deprecated plotters-module requests to safe migration and compatibility guidance." disable-model-invocation: true metadata: disco-role: operating license: MIT

Legacy factories

Use this sub-skill when the user is maintaining older scikit-plot code that calls classifier_factory, clustering_factory, or imports plotting helpers from the deprecated scikitplot.plotters module.

Route here

• Inject plotting methods into a classifier instance with classifier_factory.
• Inject plotting methods into a clusterer instance with clustering_factory.
• Diagnose warnings about missing methods, method-name collisions, or deprecation.
• Migrate old scikitplot.plotters imports to current modules.
• Validate compatibility quickly with scripts/legacy_factories_smoke.py.

Prefer modern routes for new work

Use direct module functions for new code:

• Metric curves and silhouette: ../metrics/SKILL.md.
• Feature importance and learning curves: ../estimators/SKILL.md.
• Elbow curves: ../clustering/SKILL.md.
• PCA plots: ../decomposition/SKILL.md.

The factory layer is useful when the user must preserve old bound-method code, but it is deprecated in this snapshot.

Inputs to check first

1. A classifier passed to classifier_factory must expose fit, score, and predict.
2. Probability-based injected methods also need predict_proba.
3. A clusterer passed to clustering_factory must expose fit and fit_predict.
4. Existing methods with the injected names may be overwritten with warnings.
5. The same SciPy/Matplotlib compatibility window from the root skill still applies.

Reroute

• If the user wants exact behavior of the underlying plot, route to the owning sub-skill after identifying the injected method.
• If the user only needs an import migration from scikitplot.plotters, read references/workflows.md.
• If a factory warning is the main issue, read references/troubleshooting.md before changing model code.

Read next

• references/api-reference.md for injected method names and verified contracts.
• references/workflows.md for classifier, clusterer, and deprecated-module migration patterns.
• references/troubleshooting.md for missing-method, override, and deprecation failures.
• scripts/legacy_factories_smoke.py for a tiny Agg-backed compatibility smoke run.