prosolis a413c92844 Branching zones G1–G4: schema, graph types, legacy compiler, run-state dual-write ...

G1 — schema. Adds zone_node + zone_edge tables and three columns to
dnd_zone_run (current_node, visited_nodes, node_choices). Linear
columns stay during the migration; G9 retires them.

G2 — types + validator. New internal/plugin/zone_graph.go defines
ZoneNode/ZoneEdge/ZoneGraph + ZoneNodeKind/ZoneEdgeLockKind. BuildGraph
enforces: exactly one entry, exactly one boss, boss reachable via BFS,
no orphan nodes, no self-loops without explicit opt-in. BuildLinearGraph
synthesizes a chain for legacy zones.

G3 — legacy compiler + dual-mode loader. compileLegacyZoneGraph turns
a ZoneDefinition into a representative linear graph (MaxRooms shape).
loadZoneGraph returns the registered graph if hand-authored (G7+),
else the legacy fallback. compileRunGraph mirrors a per-run RoomSeq
exactly for hot-swap derivations.

G4 — run-state dual-write. DungeonRun gains CurrentNode / VisitedNodes
/ NodeChoices. scanZoneRun reads them and hot-swaps current_node from
current_room when a row predates the migration (deriveLegacyNodeID
matches BuildLinearGraph's "<zone>.r<n>" scheme). startZoneRun and
markRoomCleared write both columns.

No behavior change yet — navigation surface (forks, locked edges,
!zone go) lands in G5.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-09 14:34:05 -07:00

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