feat: author discoverable forest edge

docs/BUILD_IN_PUBLIC_PLAN.md

@@ -792,14 +792,21 @@ Completed:
     player berry harvests thin fruit and leaves; real NPC wood gathers thin the
     crown and leave a stump. Low and depleted saves restore the same visuals
     using only `amount_remaining`, with matched Metal comparison frames.
+39. `Jajce Forest Edge 06`: `tree_forest_grove_01` and
+    `tree_forest_grove_02` now anchor a bounded forest-edge cluster beyond the
+    first 24 m discovery pass. Two decorative trees plus 24 fern, mushroom, and
+    stone instances stay presentation-only. Both finite trees remain reachable,
+    deplete into shared stumps, restore from authoritative amount, and keep the
+    world/save total at eighteen resources.
 
 Next:
 
-1. Move the existing `tree_forest_grove_01` and `tree_forest_grove_02` anchors
-   into one bounded forest-edge authoring cluster. Reuse the proven tree amount
-   presentation, preserve both stable IDs, and prove reachable expanding
-   discovery plus depletion/restore without serializing decorative foliage.
-2. Add livestock only with a real identity and interaction contract.
+1. Add one named goat as an identity-backed simulation vertical slice: stable
+   animal ID, authoritative position and hunger/feed state, loaded visual
+   binding, and an exact feed interaction shared by one NPC and the player.
+   Feeding must withdraw real pantry food and survive deterministic save/load.
+2. Add a small herd, breeding, or animal products only after that single-animal
+   identity and conservation contract is proven.
 
 Do not start with GIS data, a full city, a large asset pack, or more NPC
 mechanics. The next proof is a beautiful stage for the systems that already