[v0.1.18] 2026-03-18

- Updated helios-core to v1.3.69

## Context
- Added `doesPrimitiveExist()` method to check whether primitives exist by single UUID or list of UUIDs
- Added `resolveMaterialTextures()` method for material-based texture suppression resolution (modifies colors in-place, returns resolved texture paths)
- Added `packGPUBuffers()` method to pack GPU-ready geometry buffers into a single binary blob for zero-copy Three.js BufferGeometry loading

Author: bnbailey-psl

docs/CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+# [v0.1.18] 2026-03-18
+
+- Updated helios-core to v1.3.70
+
+## Plant Architecture
+- Added optional `include_hidden` parameter to `getAllPlantUUIDs()` to allow querying hidden prototype primitives
+- `deletePlantInstance()` now automatically cleans up hidden prototype primitives when all plant instances have been deleted
+
+## Context
+- Added `doesPrimitiveExist()` method to check whether primitives exist by single UUID or list of UUIDs
+- Added `resolveMaterialTextures()` method for material-based texture suppression resolution (modifies colors in-place, returns resolved texture paths)
+- Added `packGPUBuffers()` method to pack GPU-ready geometry buffers into a single binary blob for zero-copy Three.js BufferGeometry loading
+
 # [v0.1.17] 2026-03-15
 
 - Updated helios-core to v1.3.68

helios-core

@@ -35,7 +35,7 @@ PYHELIOS_API unsigned int addChildShoot(PlantArchitecture* plantarch, unsigned i
 // Plant query functions
 PYHELIOS_API int getAvailablePlantModels(PlantArchitecture* plantarch, char*** model_names, int* count);
 PYHELIOS_API unsigned int* getAllPlantObjectIDs(PlantArchitecture* plantarch, unsigned int plantID, int* count);
-PYHELIOS_API unsigned int* getAllPlantUUIDs(PlantArchitecture* plantarch, unsigned int plantID, int* count);
+PYHELIOS_API unsigned int* getAllPlantUUIDs(PlantArchitecture* plantarch, unsigned int plantID, bool include_hidden, int* count);
 
 // Memory cleanup functions
 PYHELIOS_API void freeStringArray(char** strings, int count);

native/include/pyhelios_wrapper_context.h

@@ -405,7 +405,7 @@ extern "C" {
         }
     }
 
-    PYHELIOS_API unsigned int* getAllPlantUUIDs(PlantArchitecture* plantarch, unsigned int plantID, int* count) {
+    PYHELIOS_API unsigned int* getAllPlantUUIDs(PlantArchitecture* plantarch, unsigned int plantID, bool include_hidden, int* count) {
         try {
             clearError();
             if (!plantarch) {
@@ -418,7 +418,7 @@ extern "C" {
                 return nullptr;
             }
 
-            std::vector<uint> uuids = plantarch->getAllPlantUUIDs(plantID);
+            std::vector<uint> uuids = plantarch->getAllPlantUUIDs(plantID, include_hidden);
 
             // Convert vector to static array for return
             static thread_local std::vector<unsigned int> static_result;

native/include/pyhelios_wrapper_plantarchitecture.h

@@ -796,15 +796,17 @@ def getAllPlantObjectIDs(self, plant_id: int) -> List[int]:
         except Exception as e:
             raise PlantArchitectureError(f"Failed to get object IDs for plant {plant_id}: {e}")
 
-    def getAllPlantUUIDs(self, plant_id: int) -> List[int]:
+    def getAllPlantUUIDs(self, plant_id: int, include_hidden: bool = False) -> List[int]:
         """
         Get all primitive UUIDs for a specific plant.
 
         Args:
             plant_id: ID of the plant instance
+            include_hidden: If True, also include UUIDs of hidden prototype
+                primitives managed by this PlantArchitecture instance.
 
         Returns:
-            List of primitive UUIDs comprising the plant
+            List of primitive UUIDs comprising the plant (and optionally hidden prototypes)
 
         Raises:
             ValueError: If plant_id is negative
@@ -818,7 +820,7 @@ def getAllPlantUUIDs(self, plant_id: int) -> List[int]:
             raise ValueError("Plant ID must be non-negative")
 
         try:
-            return plantarch_wrapper.getAllPlantUUIDs(self._plantarch_ptr, plant_id)
+            return plantarch_wrapper.getAllPlantUUIDs(self._plantarch_ptr, plant_id, include_hidden)
         except Exception as e:
             raise PlantArchitectureError(f"Failed to get UUIDs for plant {plant_id}: {e}")