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Dragging an edge now rings the port it would connect to and snaps the line there. A drop on a node's body takes that node's first free compatible port, or the last compatible one when none is free, replacing its link. A drop into empty space opens the palette filtered to the node types the edge could reach at all, and the picked node arrives wired - node and link as one undo step, so a single undo takes back the whole gesture. The decision of what fits what lives in core/graph/dropTarget.ts as pure functions, tested directly; the canvas only draws the answer. The palette takes an optional filter rather than knowing about drags. Verified remote on the Windows box (GPU): ALL PASSED, 284 checks.
todo-notes
A drop box for ideas that come up while work is already in progress, so they are not lost and not squeezed into the running task. One file per topic, free form, any language.
Anything in here is fair game to pick up at any time. When a note is done, move the file to done/
rather than deleting it – the note says what was wanted, the commit says what was built.