Changelog

This page mirrors the project's release history from CHANGELOG.md.

v1.4.0 (2026-04-10)

Features

• Add Animator GIF export examples for parameter, price, and income sweeps across four standard utility families
• Add budget-only sweep examples so teaching pages can isolate how the budget constraint moves
• Add WidgetViewer numeric input boxes alongside sliders for notebook use

Fixes

• Prevent GIF frame stacking by compositing each frame onto a white background before export
• Improve the Playground notebook install flow for Colab by making the install cell restart-safe

Cobb-Douglas price sweep with a fixed utility function and moving budget line.

Budget-only income sweep used to isolate pure budget-line motion.

v1.2.0 (2026-03-30)

Features

• Add multi-panel Figure layouts and Layout enum (closes #7)
• Add linked DemandDiagram for Marshallian demand teaching figures (closes #31)
• Add PricePath / IncomePath helpers and Canvas.add_path() for PCC / ICC plots (closes #5)

v1.1.0 (2026-03-30)

Features

• Add comparative_statics helper (closes #12)
• Add HomogeneityAnalyzer and ReturnsToScale to the analysis submodule (closes #14)
• Add Translog model (#9) and legend / indifference-curve label support (#11)

v1.0.2 (2026-03-29)

Bug fixes

• Prevent double-wrap of math axis labels (closes #2)
• Remove NumPy upper bound to prevent Colab environment conflicts

v1.0.1 (2026-03-29)

Bug fixes

• Pin numpy<2 to prevent ABI mismatch on Colab and local installs

Chores

• Relax Python / NumPy bounds and pin pytest to 8.x

Documentation

• Add Stone-Geary to README and update the test-count badge

v1.0.0 (2026-03-28)

• Initial release

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