feat: index loaded resource discovery

docs/LEARNING_ROADMAP.md

@@ -474,6 +474,12 @@ keeps identical final checksums after one reusable per-tick population view and
 improves that case from 65.84 to 85.81 ticks per second. Revisit the target when
 world presentation or LOD enters the measured workload.
 
+[Loaded Resource Discovery 01](benchmarks/LOADED_RESOURCE_DISCOVERY_01.md)
+proves the first real spatial consumer. Exact loaded-anchor resolution remains
+near four inspected candidates from 18 through 1,800 resources, preserves every
+linear selected-target checksum, and keeps persistent authority outside the
+index.
+
 ## Milestone 9 — Player interaction and social agency
 
 ### Learn
@@ -873,18 +879,28 @@ The 600-NPC case falls from 15,187.74 to 11,654.10 microseconds per tick, a
 cost. See
 [Simulation scaling baseline 02](benchmarks/SIMULATION_SCALING_BASELINE_02.md).
 
-The immediate next systems slice should now prove spatial discovery for the
-world vision: index loaded finite `ResourceNode` anchors through
-`ActiveWorldAdapter` so Terrain3D-authored sources can be placed much farther
-apart without an all-node scan for every resolution. Preserve stable IDs,
-current distance/risk/comfort/priority scoring, reachability, reservations,
-player parity, unload/rebind authority, and exact deterministic outcomes. First
-measure 18, 180, and 1,800 loaded candidates; do not choose a generic spatial
-framework or active/abstract LOD mode before that real consumer proves the
-contract.
+The first loaded-world spatial consumer is complete. `ActiveWorldAdapter` owns
+a disposable 24 m horizontal grid of loaded finite `ResourceNode` anchors.
+`ActionTargetResolver` expands through nearby ranges and stops only when
+authoritative risk/comfort/priority bounds prove that no farther source can win.
+Matched 18/180/1,800-source samples preserve every selected-target checksum;
+the 1,800-source case falls from 6,448.00 to 46.94 microseconds per resolution.
+Unload/rebind state authority, stable tie order, moved anchors, reservations,
+player parity, and a deliberately far high-priority winner remain covered. See
+[Loaded Resource Discovery 01](benchmarks/LOADED_RESOURCE_DISCOVERY_01.md).
+
+The immediate next slice should pair this systems foundation with the authored
+world: sculpt the real Terrain3D river channel and waterfall shelf, rebake and
+validate navigation, then use the first larger foliage/resource pass to prove a
+bounded stable-ID anchor placement workflow alongside decorative Terrain3D
+instancing. Do not generalize the resource grid to people/buildings/events or
+introduce active/abstract LOD before those consumers need it.
 
 Recently completed:
 
+- Loaded-resource spatial discovery: a resource-specific active-world grid
+  preserves exact score winners and lifecycle authority while reducing the
+  reviewed 1,800-anchor query from 6.45 ms to 46.94 µs.
 - Shared population query view: one transient per-tick all/living/starving
   index replaces repeated scarce-food relationship scans, preserves exact
   checksums, and improves the reviewed 600-NPC workload by 23.3%.