diff --git a/core/src/Villager.cpp b/core/src/Villager.cpp
index d9bbef1..078dd77 100644
--- a/core/src/Villager.cpp
+++ b/core/src/Villager.cpp
@@ -155,3 +155,157 @@ bool isWorkstationBlock(Block block) {
     return professionForWorkstation(block) != VillagerProfession::Unemployed;
 }
 
+int villagerExperienceForLevel(int level) {
+    if (level <= 1) return 0;
+    if (level >= villagerMaxLevel) return levelThresholds[villagerMaxLevel - 1];
+    return levelThresholds[level - 1];
+}
+
+int villagerLevelForExperience(int experience) {
+    int level = 1;
+    for (int candidate = 2; candidate <= villagerMaxLevel; ++candidate)
+        if (experience >= levelThresholds[candidate - 1]) level = candidate;
+    return level;
+}
+
+const char* villagerActivityName(VillagerActivity activity) {
+    switch (activity) {
+        case VillagerActivity::Idle: return "idle";
+        case VillagerActivity::SeekWorkstation: return "seekWorkstation";
+        case VillagerActivity::Work: return "work";
+        case VillagerActivity::Meet: return "meet";
+        case VillagerActivity::Sleep: return "sleep";
+        case VillagerActivity::Panic: return "panic";
+        case VillagerActivity::Count: break;
+    }
+    return "unknown";
+}
+
+void PoiRegistry::scan(const World& world, const Vec3i& center, int radius, int verticalRadius,
+                       const PathConfig& config) {
+    clear();
+    for (int x = center.x - radius; x <= center.x + radius; ++x) {
+        for (int y = center.y - verticalRadius; y <= center.y + verticalRadius; ++y) {
+            for (int z = center.z - radius; z <= center.z + radius; ++z) {
+                Block block = world.blockAt(x, y, z);
+                if (!poiBlock(block)) continue;
+                WorkstationPoi poi;
+                poi.pos = {x, y, z};
+                poi.block = block;
+                poi.profession = professionForWorkstation(block);
+                poi.valid = true;
+                poi.reachable = resolveStandCell(world, poi.pos, block, config, poi.standCell);
+                if (block == Block::Bell && bell < 0) bell = static_cast<int>(pois.size());
+                pois.push_back(poi);
+            }
+        }
+    }
+}
+
+int PoiRegistry::indexAt(const Vec3i& pos) const {
+    for (std::size_t i = 0; i < pois.size(); ++i)
+        if (pois[i].valid && pois[i].pos == pos) return static_cast<int>(i);
+    return -1;
+}
+
+int PoiRegistry::workstationCount() const { return countPois(false, false); }
+
+int PoiRegistry::bedCount() const { return countPois(true, false); }
+
+int PoiRegistry::freeWorkstationCount() const { return countPois(false, true); }
+
+int PoiRegistry::freeBedCount() const { return countPois(true, true); }
+
+int PoiRegistry::countPois(bool beds, bool onlyFree) const {
+    int count = 0;
+    for (const WorkstationPoi& poi : pois) {
+        if (beds ? !poi.isBed() : !poi.isWorkstation()) continue;
+        if (onlyFree ? !poi.free() : !poi.valid) continue;
+        ++count;
+    }
+    return count;
+}
+
+int PoiRegistry::nearestFree(const Vec3i& from, bool beds, VillagerProfession wanted) const {
+    int best = -1;
+    int bestDistance = 0;
+    for (std::size_t i = 0; i < pois.size(); ++i) {
+        const WorkstationPoi& poi = pois[i];
+        if (!poi.free() || !poi.reachable) continue;
+        if (beds ? !poi.isBed() : !poi.isWorkstation()) continue;
+        if (!beds && wanted != VillagerProfession::Unemployed && poi.profession != wanted) continue;
+        int distance = squaredDistance(poi.standCell, from);
+        if (best < 0 || distance < bestDistance) {
+            best = static_cast<int>(i);
+            bestDistance = distance;
+        }
+    }
+    return best;
+}
+
+int PoiRegistry::nearestFreeWorkstation(const Vec3i& from, VillagerProfession wanted) const {
+    return nearestFree(from, false, wanted);
+}
+
+int PoiRegistry::nearestFreeBed(const Vec3i& from) const {
+    return nearestFree(from, true, VillagerProfession::Unemployed);
+}
+
+bool PoiRegistry::claim(int index, int villagerId) {
+    if (index < 0 || index >= size()) return false;
+    WorkstationPoi& poi = pois[index];
+    if (!poi.valid || poi.ownerId >= 0) return false;
+    poi.ownerId = villagerId;
+    return true;
+}
+
+void PoiRegistry::release(int index) {
+    if (index < 0 || index >= size()) return;
+    pois[index].ownerId = -1;
+}
+
+void PoiRegistry::releaseOwner(int villagerId) {
+    for (WorkstationPoi& poi : pois)
+        if (poi.ownerId == villagerId) poi.ownerId = -1;
+}
+
+int PoiRegistry::revalidate(const World& world, const PathConfig& config) {
+    int lost = 0;
+    for (std::size_t i = 0; i < pois.size(); ++i) {
+        WorkstationPoi& poi = pois[i];
+        if (!poi.valid) continue;
+        if (world.blockAt(poi.pos.x, poi.pos.y, poi.pos.z) != poi.block) {
+            poi.valid = false;
+            poi.ownerId = -1;
+            if (bell == static_cast<int>(i)) bell = -1;
+            ++lost;
+            continue;
+        }
+        poi.reachable = resolveStandCell(world, poi.pos, poi.block, config, poi.standCell);
+    }
+    return lost;
+}
+
+void PoiRegistry::clear() {
+    pois.clear();
+    bell = -1;
+}
+
+Vec3i Villager::cell() const {
+    return {static_cast<int>(std::floor(body.position.x)),
+            static_cast<int>(std::floor(body.position.y)),
+            static_cast<int>(std::floor(body.position.z))};
+}
+
+Villager makeVillager(int id, const Vec3& position, uint32_t seed) {
+    Villager villager;
+    villager.id = id;
+    villager.body.position = position;
+    villager.body.width = 0.6f;
+    villager.body.height = 1.95f;
+    villager.rng = seed ^ (static_cast<uint32_t>(id) * 0x27d4eb2du);
+    uint32_t draw = nextRandom(villager.rng);
+    if (draw % 8u == 0u) villager.profession = VillagerProfession::Nitwit;
+    return villager;
+}
+