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Author SHA1 Message Date
Erik
24ce8a0b5e docs(D.5.3/B.1): drag-drop spine implementation plan
Bite-sized TDD plan for Stream B.1, four tasks matching the spec slices:
 1. ItemDragPayload + ItemDragSource + IItemListDragHandler + UiItemList
    handler registration.
 2. UiElement GetDragPayload/GetDragGhost virtuals + UiItemSlot drag source
    + drop target + accept/reject overlay; use moves MouseDown->Click (fixes
    the existing ToolbarControllerTests.Click test in-task to stay green).
 3. UiRoot payload pull + cancel-on-null + cursor ghost (AP-47).
 4. ToolbarController stub handler + spine wiring (TS-33) + registration tests.

Exact code, commands, and the AP-47/TS-33 register rows inline. Plan + spec
preapproved by the user; executing subagent-driven next.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-20 12:31:37 +02:00