Core engine that prices energy usage against UK electricity tariffs, independent of Home Assistant. See CONTEXT.md for the domain model.
uv sync
uv run pytest
uv run ruff check .custom_components/energy_engine/ is a HACS-installable integration that surfaces the core
engine in Home Assistant. The core engine itself lives at
custom_components/energy_engine/core/ — HACS only ever ships the custom_components/ folder,
so the core engine is developed there directly rather than as a separate package that needs
syncing in.