Complete the Layer-4 quarter geometry with the street layer (D-234), replacing
the ChunkLayout/CorridorSpine/AccessPoint String stubs with real types:
- AccessPoint{position,kind} + AccessKind (QuarterEdge/ReservationGate/
BlockJunction): the quarter's road nodes (from road_entry_directions octants +
reservation gates), the node set the D-097 audit reads.
- CorridorSpine{from,to,path}: arterial trunk edges, ±45°-snapped polylines
(D-096 cap). Topology gated by morphology (D-234a): Ribbon (fjord/canyon/
mountain-pass), HubSpoke (delta/island/enclosed water), Mesh/Prim-MST
(plains/meander/coastal). A spanning tree over the access nodes.
- ChunkLayout{spacing,offset,rotation_steps}: per-block local ±45° lattice,
spacing from density, offset/rotation modulated by the D-096 Grid/Organic mode.
Wired into generate_quarter_skeleton (access_points + corridors + per-block
chunk_layout). All integer-deterministic (D-010). 7 new tests.
Remaining D-234 piece: the per-edge waterfront pier/quay rule needs Layer-1
terrain water-adjacency threaded to the skeleton (cross-layer plumbing).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
jpmschweitzerandClaude Opus 4.8
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