Changelog #

0.2.0-dev.0 #

Starts the shared-runtime development line for dnd_kit_core.
Adds DndRuntime as the framework-neutral drag engine shared by the Flutter and Jaspr adapters.
Moves DndMeasuringRegistry and its measurement-status contract into core so adapters can share the same measuring cache model.
Moves DndPointerSensor to core on top of DndRuntime, preserving the pointer-activation state machine across adapters.
Brings the shared sortable move/strategy math and auto-scroll edge/velocity math into core for reuse outside Flutter.

First public release of the pure Dart engine: stable identifiers, geometry, drag state and events, collision detectors, modifiers, sensor and registry contracts, and diagnostics.
DndRegistry.registerDraggable/registerDroppable and their unregister counterparts accept an optional owner. Owner-aware registration is last-wins and lets a new owner take over an id without tripping duplicate detection — required so draggables in a lazy ListView.builder survive the list rebuilding a keyed entry (new element mounts before the old is disposed). A departing owner can no longer remove a registration that a newer owner already took over.
Owner-aware entries now also keep per-id owner claims and emit a deferred duplicate warning when multiple owners still claim the same id after reconciliation. This restores actionable duplicate diagnostics for owner-registered entries without reintroducing the lazy-list remount crash.
Calls without owner keep the strict duplicate-id debug assertion and immediate warning behavior for direct DndRegistry usage.

Added a package-local example/example.md so pub.dev can render a compact illustrative pure Dart example for the package.

Initial development release of the pure Dart dnd_kit_core package.
Includes stable ID, geometry, drag state, drag event, collision detector, modifier, sensor, registry, and diagnostics primitives.
Keeps Flutter, dart:ui, widget, render object, gesture, overlay, and app state-management dependencies out of the core package.