Teach the build

Produce one teach packet so the user understands a finished build before deciding what happens to it: the journey (how it was built, where the map disagreed with the territory) and the operation (how the feature runs inside the surrounding system). Aid only — never a ship gate: open questions are the packet's boundary, never a merge recommendation.

The contract

ONE LOCAL HTML FILE, FIVE SECTIONS, FIGURES AS INLINE SVG
CHAT PROSE IS A POINTER TO THE PACKET, NEVER THE DELIVERABLE