Closes D1. Both T5 zones follow the D1-a/b/c/d pattern: extend the
graph so the longest entry→boss walk lands in band, keep the zone's
authored topology intact. Also backfills the missing per-node
RegionID authoring against dnd_expedition_region.go — the D1-d
deferral note flagged this as a prerequisite for T5.
dragons_lair (T5): 12 → 47 nodes, longest 38 (band 36-44)
abyss_portal (T5): 13 → 51 nodes, longest 39 (band 36-44)
Topology preserved per zone:
- Dragon's Lair: 4-region authoring (every node carries a valid
RegionID); binary-converging fork1 (ash_bridge TRAP / treasure_vault
Perception 15) still converges at the R3 wyrmlings_nest elite;
capstone fork2 still 3-way (LockNone / CHA 16 / Perception 17
SECRET LootBias 2.5) with each spur preserving its own named
capstone node. New R4 infernax_doors MERGE consolidates the long
final hall instead of triplicating it.
- Abyss Portal: 4-region authoring; three sequential forks preserved
(binary / binary / ternary) — fork1 Perception 16, fork2 CON 16
(full STR/DEX/CON/INT/WIS/CHA roster still covered), fork3 capstone
3-way with reality_seam SECRET LootBias 3.0. New R4 belaxath_doors
MERGE consolidates the final tear-approach.
MinRooms/MaxRooms re-pitched 9-10 → 36-44 so the dice fallback also
lands in band for any future graphless variant.
T5 zone, eighth authored graph. Shape: three fork nodes in series —
binary, binary, ternary capstone. Player makes three separate fork
decisions in this zone, more than any other shipping zone, matching
the "things keep getting worse" thematic descent.
First zone with LockStatCheck CON (mind_corridor, DC 16, psychic
pressure flavor) — completes the full ability roster (STR/DEX/CON/
INT/WIS/CHA) across shipping zones by G8h. reality_seam secret
LootBias 3.0, the highest authored.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
