feat: add paired goat care

docs/BUILD_IN_PUBLIC_PLAN.md

@@ -811,15 +811,20 @@ Completed:
     exact mid-route state through schema-v11 restore and presentation
     unload/reload. The animal feature assets now live together under
     `world/animals/goat/`, while ignored docs no longer create import sidecars.
+42. `Jajce Goat Pair 09`: Zora now joins Dunja as a second named, stable animal
+    with an authored private shelter and deterministic access to the shared
+    pasture. Simultaneous hunger selects the nearest available loaded goat,
+    preserves two exact reservations through save/restore, and feeds only the
+    named target. Private shelter ownership remains loaded-world context; no
+    herd system, animal index, or schema bump was introduced.
 
 Next:
 
-1. Add one second named goat with its own stable state, authored shelter
-   context, and deterministic use of the shared pasture. Prove nearest
-   feed-target selection and independent reservations when both animals are
-   hungry.
+1. Playtest the named pair and record one concrete gameplay or scaling need
+   before extending the animal model.
 2. Keep breeding, products, herd scheduling, animal spatial indexing, and
-   active/abstract simulation LOD deferred until two real animals require them.
+   active/abstract simulation LOD deferred unless that evidence requires one
+   of them; otherwise return to the broader milestone sequence.
 
 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

docs/LEARNING_ROADMAP.md

@@ -938,16 +938,28 @@ destination, and every NPC RNG stream. Unloading and re-instantiating the goat
 scene retains that same travel state, arrival is exact, and hunger stops
 movement before feeding.
 
-The immediate next slice should add one second named goat with its own stable
-record and authored shelter context while sharing the existing pasture.
-Selection and reservation tests must prove that simultaneous hunger still
-chooses the nearest real animal and mutates only the exact target. Keep
-loaded-animal discovery linear and defer herd scheduling, breeding, products,
-animal indexing, and active/abstract simulation LOD until two identities
-demonstrate a concrete need.
+The first multi-animal care slice is complete. Zora adds a second stable record,
+loaded presentation, and private shelter while sharing Dunja's pasture. When
+both goats are hungry, loaded target resolution chooses the nearest available
+interaction point, two villagers can retain independent exact claims, and
+feeding Zora leaves Dunja's hunger, feed history, and reservation untouched.
+Schema-v11 restore preserves both claim pairings and checksum. Loaded routine
+sites now distinguish private shelter ownership from shared species context
+without adding that authored-world fact to saved simulation state.
+
+The immediate next step is a playtest-and-measure gate, not a herd abstraction.
+Keep loaded-animal discovery linear and use the named pair to identify one
+concrete gameplay need before adding breeding, products, herd scheduling,
+animal indexing, or active/abstract animal LOD. If no such need appears, resume
+the broader milestone sequence instead of adding animal framework by momentum.
 
 Recently completed:
 
+- `Jajce Goat Pair 09`: named goat Zora adds a second independent animal
+  record and private shelter while sharing Dunja's pasture. Stable nearest
+  targeting, simultaneous exact reservations, isolated feed mutation and
+  events, deterministic routine ownership, and active-claim save/restore prove
+  the multi-animal contract without a schema bump or herd system.
 - `Jajce Dunja Habitat 08`: the first deterministic animal routine alternates
   shelter and pasture through real loaded navigation, preserves exact
   mid-route state across save/restore and presentation unload/reload, stops

docs/PROJECT_CONTEXT.md

@@ -999,10 +999,14 @@ World-schema v10 restore reconstructs her persistent state without replaying
 the transient response. Dunja now also alternates between a stable shelter and
 pasture through real loaded navigation. World-schema v11 preserves exact
 mid-route position, destination, and schedule through restore or presentation
-unload/reload without consuming decision RNG. The next bounded animal slice
-should add one second named goat and prove independent nearest-target care
-before any herd abstraction. Do not yet generalize animal discovery or
-introduce active/abstract simulation LOD.
+unload/reload without consuming decision RNG. Zora now proves the bounded
+multi-animal contract: her independent stable record and private shelter share
+Dunja's pasture, nearest loaded care targeting supports two simultaneous exact
+claims, and feeding one goat cannot mutate the other. World-schema v11
+preserves both claim pairings without serializing shelter ownership. Do not
+generalize animal discovery or introduce herd scheduling, products, breeding,
+or active/abstract animal LOD until playtest or measurement exposes a concrete
+need.
 
 The remaining simulation-garden target still aims for:
 

docs/SIMULATION_DEFINITIONS.md

@@ -37,10 +37,10 @@ both require one stored wood without duplicating that rule.
 farmer profession and declares an exact one-food completion cost. Selection,
 animal target reservation, and completion remain separate; NPC and player
 completion both use `AnimalCareSystem`'s same pantry-to-animal transaction.
-`SimulationIds` also names Dunja's shelter and pasture anchors. These IDs are
-saved routine vocabulary; their loaded positions come from
-`AnimalRoutineSite` rather than entering an action definition or resource
-registry.
+`SimulationIds` names Dunja and Zora, their private shelter anchors, and the
+shared pasture anchor. These IDs are saved routine vocabulary; their loaded
+positions and private/shared ownership come from `AnimalRoutineSite` rather
+than entering an action definition or resource registry.
 
 ## Current profession contract
 

docs/SIMULATION_STATE_SCHEMA.md

@@ -284,13 +284,23 @@ care operation: reserve or select the exact animal, withdraw one real food
 from `village_pantry`, reduce that animal's hunger, and append one exact
 `animal_fed` fact. Failed withdrawal changes neither animal nor history.
 
-The first routine consumer alternates Dunja between stable-ID shelter and
-pasture markers without drawing RNG. `ActiveWorldAdapter` supplies the loaded
-marker positions, the selected ID and exact position enter state, and
-`AnimalNode` follows a real `NavigationServer3D` path while reporting factual
-position changes. A mid-route save restores the same position and target;
-unloading the scene node pauses presentation only, and reloading it resumes
-from those facts. Hunger cancels travel before care targeting.
+The first routine consumers alternate Dunja and Zora between stable-ID private
+shelters and one shared pasture without drawing RNG. `AnimalRoutineSite`
+declares optional loaded-world resident ownership: an empty resident ID is
+shared species context, while a named resident makes a shelter private.
+`ActiveWorldAdapter` filters those loaded markers for each stable animal; site
+ownership is not persistent state and does not require a schema bump. The
+selected site ID and exact position do enter state, and each `AnimalNode`
+follows a real `NavigationServer3D` path while reporting factual position
+changes. A mid-route save restores the same position and target; unloading a
+scene node pauses presentation only, and reloading it resumes from those facts.
+Hunger cancels travel before care targeting.
+
+Multiple animal records remain independently authoritative. A schema-v11 save
+may contain concurrent feed reservations only when each reserving NPC targets
+that exact animal in a valid travel or work state. Restoring Dunja and Zora
+preserves both claim pairings and the checksum; completing one feed releases
+and mutates only its destination record.
 
 The persistent hungry/content presentation derives from authoritative hunger.
 The short feed response is transient and is reset rather than serialized or