Pose mode improvements, armature validation improvements.

Pose mode Improvements:

Batch processing for all mesh operations
Numpy-powered vertex array handling
Optimized modifier stack management
Smart shape key processing
Enhanced progress tracking

The armature validation system improvements:

Essential bones (hips, spine, chest, neck, head)
Proper bone hierarchy validation
Symmetry pair verification (e.g., arm.l/arm.r)

core/common.py

@@ -1,10 +1,48 @@
 import bpy
 import numpy as np
-from bpy.types import Context, Object
-from typing import Optional, Tuple, List, Set
+import logging
+from bpy.types import Context, Object, Modifier
+from typing import Optional, Tuple, List, Set, Dict, Any, Generator, Callable
 from ..core.translations import t
 from ..core.dictionaries import bone_names
 
+logger = logging.getLogger('avatar_toolkit')
+logger.setLevel(logging.DEBUG)
+
+def setup_logging() -> None:
+    """Configure logging for Avatar Toolkit"""
+    handler = logging.StreamHandler()
+    handler.setLevel(logging.DEBUG)
+    formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+    handler.setFormatter(formatter)
+    logger.addHandler(handler)
+
+class ProgressTracker:
+    """Universal progress tracking for Avatar Toolkit operations"""
+    
+    def __init__(self, context: Context, total_steps: int, operation_name: str = "Operation"):
+        self.context = context
+        self.total = total_steps
+        self.current = 0
+        self.operation_name = operation_name
+        self.wm = context.window_manager
+        
+    def step(self, message: str = "") -> None:
+        """Update progress by one step"""
+        self.current += 1
+        progress = self.current / self.total
+        self.wm.progress_begin(0, 100)
+        self.wm.progress_update(progress * 100)
+        logger.debug(f"{self.operation_name} - {progress:.1%}: {message}")
+        
+    def __enter__(self):
+        logger.info(f"Starting {self.operation_name}")
+        return self
+        
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.wm.progress_end()
+        logger.info(f"Completed {self.operation_name}")
+
 def get_active_armature(context: bpy.types.Context) -> Optional[bpy.types.Object]:
     """Get the currently selected armature from Avatar Toolkit properties"""
     armature_name = context.scene.avatar_toolkit.active_armature
@@ -25,26 +63,94 @@ def get_armature_list(self=None, context: bpy.types.Context = None) -> List[Tupl
         return [('NONE', t("Armature.validation.no_armature"), '')]
     return armatures
 
-def validate_armature(armature: bpy.types.Object) -> Tuple[bool, str]:
-    """
-    Validate if the selected object is a proper armature and has required bones
-    Returns tuple of (is_valid, message)
-    """
-    if not armature:
-        return False, t("Armature.validation.no_armature")
-    if armature.type != 'ARMATURE':
-        return False, t("Armature.validation.not_armature")
-    if not armature.data.bones:
-        return False, t("Armature.validation.no_bones")
+def validate_armature(armature: bpy.types.Object, validation_level: str = 'standard') -> Tuple[bool, List[str]]:
+    """Enhanced armature validation with multiple checks and validation levels"""
+    messages = []
     
-    essential_bones: Set[str] = {'hips', 'spine', 'chest', 'neck', 'head'}
-    found_bones: Set[str] = {bone.name.lower() for bone in armature.data.bones}
+    # Basic checks
+    if not armature or armature.type != 'ARMATURE' or not armature.data.bones:
+        return False, [t("Armature.validation.basic_check_failed")]
         
+    found_bones = {bone.name.lower(): bone for bone in armature.data.bones}
+    
+    # Essential bones check
+    essential_bones = {'hips', 'spine', 'chest', 'neck', 'head'}
+    missing_bones = []
     for bone in essential_bones:
         if not any(alt_name in found_bones for alt_name in bone_names[bone]):
-            return False, t("Armature.validation.missing_bone", bone=bone)
+            missing_bones.append(bone)
+    
+    if missing_bones:
+        messages.append(t("Armature.validation.missing_bones", bones=", ".join(missing_bones)))
+    
+    if validation_level in ['standard', 'strict']:
+        # Hierarchy validation
+        hierarchy = [('hips', 'spine'), ('spine', 'chest'), ('chest', 'neck'), ('neck', 'head')]
+        for parent, child in hierarchy:
+            if not validate_bone_hierarchy(found_bones, parent, child):
+                messages.append(t("Armature.validation.invalid_hierarchy", parent=parent, child=child))
+        
+        # Symmetry validation
+        symmetry_pairs = [('arm', 'l', 'r'), ('leg', 'l', 'r')]
+        for base, left, right in symmetry_pairs:
+            if not validate_symmetry(found_bones, base, left, right):
+                messages.append(t("Armature.validation.asymmetric_bones", bone=base))
+                
+        # Special handling for hand/wrist symmetry
+        if (not validate_symmetry(found_bones, 'hand', 'l', 'r') and 
+            not validate_symmetry(found_bones, 'wrist', 'l', 'r')):
+            messages.append(t("Armature.validation.asymmetric_hand_wrist"))
+    
+    is_valid = len(messages) == 0
+    return is_valid, messages
+
+def validate_bone_hierarchy(bones: Dict[str, bpy.types.Bone], parent_name: str, child_name: str) -> bool:
+    """Validate if there is a valid parent-child relationship between bones"""
+    # Find matching parent and child bones using bone_names dictionary
+    parent_bone = None
+    child_bone = None
+    
+    # Check for parent bone matches
+    for alt_name in bone_names[parent_name]:
+        if alt_name in bones:
+            parent_bone = bones[alt_name]
+            break
+            
+    # Check for child bone matches
+    for alt_name in bone_names[child_name]:
+        if alt_name in bones:
+            child_bone = bones[alt_name]
+            break
+    
+    if not parent_bone or not child_bone:
+        return False
+        
+    # Check if child's parent matches parent bone
+    return child_bone.parent == parent_bone
+
+def validate_symmetry(bones: Dict[str, bpy.types.Bone], base: str, left: str, right: str) -> bool:
+    """
+    Validate if matching left and right bones exist for a given base bone name
+    """
+    # Define common naming patterns
+    left_patterns = [
+        f"{base}.{left}",
+        f"{base}_{left}",
+        f"{left}_{base}"
+    ]
+    
+    right_patterns = [
+        f"{base}.{right}",
+        f"{base}_{right}", 
+        f"{right}_{base}"
+    ]
+    
+    # Check if any of the patterns exist in the bones dictionary
+    left_exists = any(pattern in bones for pattern in left_patterns)
+    right_exists = any(pattern in bones for pattern in right_patterns)
+    
+    return left_exists and right_exists
 
-    return True, t("QuickAccess.valid_armature")
     
 def auto_select_single_armature(context: bpy.types.Context) -> None:
     """Automatically select armature if only one exists in scene"""
@@ -69,33 +175,79 @@ def get_armature_stats(armature: bpy.types.Object) -> dict:
     }
 
 def get_all_meshes(context: Context) -> List[Object]:
+    """Get all mesh objects parented to the active armature"""
     armature = get_active_armature(context)
     if armature:
         return [obj for obj in bpy.data.objects if obj.type == 'MESH' and obj.parent == armature]
     return []
 
-def apply_pose_as_rest(context: Context, armature_obj: Object, meshes: List[Object]) -> bool:
+def validate_mesh_for_pose(mesh_obj: Object) -> Tuple[bool, str]:
+    """Validate mesh object for pose operations"""
+    if not mesh_obj.data:
+        return False, t("Mesh.validation.no_data")
+        
+    if not mesh_obj.vertex_groups:
+        return False, t("Mesh.validation.no_vertex_groups")
+        
+    armature_mods = [mod for mod in mesh_obj.modifiers if mod.type == 'ARMATURE']
+    if not armature_mods:
+        return False, t("Mesh.validation.no_armature_modifier")
+    
+    return True, t("Mesh.validation.valid")
+
+def cache_vertex_positions(mesh_obj: Object) -> np.ndarray:
+    """Cache vertex positions for a mesh object"""
+    vertices = mesh_obj.data.vertices
+    positions = np.empty(len(vertices) * 3, dtype=np.float32)
+    vertices.foreach_get('co', positions)
+    return positions.reshape(-1, 3)
+
+def apply_vertex_positions(vertices: Object, positions: np.ndarray) -> None:
+    """Apply cached vertex positions to mesh in batch"""
+    vertices.foreach_set('co', positions.flatten())
+
+def process_armature_modifiers(mesh_obj: Object) -> List[Dict[str, Any]]:
+    """Process and store armature modifier states"""
+    modifier_states = []
+    for mod in mesh_obj.modifiers:
+        if mod.type == 'ARMATURE':
+            modifier_states.append({
+                'name': mod.name,
+                'object': mod.object,
+                'vertex_group': mod.vertex_group,
+                'show_viewport': mod.show_viewport
+            })
+    return modifier_states
+
+def apply_pose_as_rest(context: Context, armature_obj: Object, meshes: List[Object]) -> Tuple[bool, str]:
+    """Apply current pose as rest pose for armature and update meshes"""
+    try:
+        logger.info(f"Starting pose application for {len(meshes)} meshes")
+        
+        with ProgressTracker(context, len(meshes), "Applying Pose") as progress:
             for mesh_obj in meshes:
                 if not mesh_obj.data:
                     continue
+                    
                 if mesh_obj.data.shape_keys and mesh_obj.data.shape_keys.key_blocks:
-            if len(mesh_obj.data.shape_keys.key_blocks) == 1:
-                basis = mesh_obj.data.shape_keys.key_blocks[0]
-                basis_name = basis.name
-                mesh_obj.shape_key_remove(basis)
-                apply_armature_to_mesh(armature_obj, mesh_obj)
-                mesh_obj.shape_key_add(name=basis_name)
-            else:
                     apply_armature_to_mesh_with_shapekeys(armature_obj, mesh_obj, context)
                 else:
                     apply_armature_to_mesh(armature_obj, mesh_obj)
                 
+                progress.step(f"Processed {mesh_obj.name}")
+            
             bpy.ops.object.mode_set(mode='POSE')
             bpy.ops.pose.armature_apply(selected=False)
             bpy.ops.object.mode_set(mode='OBJECT')
-    return True
+            
+            return True, t("Operation.pose_applied")
+            
+    except Exception as e:
+        logger.error(f"Error applying pose as rest: {str(e)}")
+        return False, str(e)
 
 def apply_armature_to_mesh(armature_obj: Object, mesh_obj: Object) -> None:
+    """Apply armature deformation to mesh"""
     armature_mod = mesh_obj.modifiers.new('PoseToRest', 'ARMATURE')
     armature_mod.object = armature_obj
     
@@ -109,6 +261,7 @@ def apply_armature_to_mesh(armature_obj: Object, mesh_obj: Object) -> None:
         bpy.ops.object.modifier_apply(modifier=armature_mod.name)
 
 def apply_armature_to_mesh_with_shapekeys(armature_obj: Object, mesh_obj: Object, context: Context) -> None:
+    """Apply armature deformation to mesh with shape keys"""
     old_active_index = mesh_obj.active_shape_key_index
     old_show_only = mesh_obj.show_only_shape_key
     mesh_obj.show_only_shape_key = True

functions/pose_mode.py

@@ -1,120 +1,168 @@
 import bpy
-import numpy as np
-from bpy.types import Operator, Context, Object
-from typing import List
+import logging
+from typing import Set, Dict, List, Tuple, Optional, Any
+from bpy.props import StringProperty
+from bpy.types import Operator, Context, Object, Event, Modifier
 from ..core.translations import t
 from ..core.common import (
     get_active_armature,
     get_all_meshes,
     apply_pose_as_rest,
-    apply_armature_to_mesh,
-    apply_armature_to_mesh_with_shapekeys,
-    validate_armature
+    validate_armature,
+    cache_vertex_positions,
+    apply_vertex_positions,
+    validate_mesh_for_pose,
+    process_armature_modifiers,
+    ProgressTracker
 )
 
+logger = logging.getLogger('avatar_toolkit.pose')
+
+class BatchPoseOperationMixin:
+    """Base class for batch pose operations"""
+    @classmethod
+    def poll(cls, context: Context) -> bool:
+        armature = get_active_armature(context)
+        if not armature:
+            return False
+        valid, _ = validate_armature(armature)
+        return valid and context.mode == 'POSE'
+    
+    def validate_meshes(self, meshes: List[Object]) -> List[Tuple[Object, str]]:
+        """Validate meshes for pose operations"""
+        invalid_meshes = []
+        for mesh in meshes:
+            valid, message = validate_mesh_for_pose(mesh)
+            if not valid:
+                invalid_meshes.append((mesh, message))
+        return invalid_meshes
+
 class AvatarToolkit_OT_StartPoseMode(Operator):
     bl_idname = 'avatar_toolkit.start_pose_mode'
-    bl_label = t("Quick_Access.start_pose_mode.label")
-    bl_description = t("Quick_Access.start_pose_mode.desc")
+    bl_label = t("QuickAccess.start_pose_mode.label")
+    bl_description = t("QuickAccess.start_pose_mode.desc")
     bl_options = {'REGISTER', 'UNDO'}
 
     @classmethod
-    def poll(cls, context):
+    def poll(cls, context: Context) -> bool:
         armature = get_active_armature(context)
         if not armature or context.mode == "POSE":
             return False
-        is_valid, _ = validate_armature(armature)
-        return is_valid
+        valid, _ = validate_armature(armature)
+        return valid
 
-    def execute(self, context: Context) -> set[str]:
+    def execute(self, context: Context) -> Set[str]:
+        try:
             armature = get_active_armature(context)
-        context.view_layer.objects.active = armature
+            logger.info(f"Starting pose mode for armature: {armature.name}")
+            
             bpy.ops.object.mode_set(mode='OBJECT')
             bpy.ops.object.select_all(action='DESELECT')
+            
+            context.view_layer.objects.active = armature
             armature.select_set(True)
             bpy.ops.object.mode_set(mode='POSE')
+            
             return {'FINISHED'}
+        except Exception as e:
+            logger.error(f"Failed to start pose mode: {str(e)}")
+            self.report({'ERROR'}, t("PoseMode.error.start", error=str(e)))
+            return {'CANCELLED'}
 
 class AvatarToolkit_OT_StopPoseMode(Operator):
     bl_idname = 'avatar_toolkit.stop_pose_mode'
-    bl_label = t("Quick_Access.stop_pose_mode.label")
-    bl_description = t("Quick_Access.stop_pose_mode.desc")
+    bl_label = t("QuickAccess.stop_pose_mode.label")
+    bl_description = t("QuickAccess.stop_pose_mode.desc")
     bl_options = {'REGISTER', 'UNDO'}
 
     @classmethod
-    def poll(cls, context):
+    def poll(cls, context: Context) -> bool:
         return get_active_armature(context) and context.mode == "POSE"
 
-    def execute(self, context: Context) -> set[str]:
+    def execute(self, context: Context) -> Set[str]:
+        try:
             bpy.ops.pose.transforms_clear()
             bpy.ops.pose.select_all(action="INVERT")
             bpy.ops.pose.transforms_clear()
             bpy.ops.pose.select_all(action="INVERT")
             bpy.ops.object.mode_set(mode='OBJECT')
             return {'FINISHED'}
-
-class AvatarToolkit_OT_ApplyPoseAsShapekey(Operator):
-    bl_idname = 'avatar_toolkit.apply_pose_as_shapekey'
-    bl_label = t("Quick_Access.apply_pose_as_shapekey.label")
-    bl_description = t("Quick_Access.apply_pose_as_shapekey.desc")
-    bl_options = {'REGISTER', 'UNDO'}
-
-    @classmethod
-    def poll(cls, context):
-        armature = get_active_armature(context)
-        if not armature or context.mode != 'POSE':
-            return False
-        is_valid, _ = validate_armature(armature)
-        return is_valid
-        
-    def execute(self, context):
-        armature_obj = get_active_armature(context)
-        mesh_objects = get_all_meshes(context)
-        
-        for mesh_obj in mesh_objects:
-            if not mesh_obj.data:
-                continue
-                
-            if not mesh_obj.data.shape_keys:
-                mesh_obj.shape_key_add(name='Basis')
-                
-            new_shape = mesh_obj.shape_key_add(name='Pose_Shapekey', from_mix=False)
-            
-            depsgraph = context.evaluated_depsgraph_get()
-            eval_mesh = mesh_obj.evaluated_get(depsgraph)
-            
-            for i, v in enumerate(eval_mesh.data.vertices):
-                new_shape.data[i].co = v.co.copy()
-
-        bpy.ops.pose.select_all(action='SELECT')
-        bpy.ops.pose.transforms_clear()
-        bpy.ops.object.mode_set(mode='OBJECT')
-        
-        self.report({'INFO'}, t('Tools.apply_pose_as_rest.success'))
-        return {'FINISHED'}
-
-class AvatarToolkit_OT_ApplyPoseAsRest(Operator):
-    bl_idname = 'avatar_toolkit.apply_pose_as_rest'
-    bl_label = t("Quick_Access.apply_pose_as_rest.label")
-    bl_description = t("Quick_Access.apply_pose_as_rest.desc")
-    bl_options = {'REGISTER', 'UNDO'}
-
-    @classmethod
-    def poll(cls, context):
-        armature = get_active_armature(context)
-        if not armature or context.mode != "POSE":
-            return False
-        is_valid, _ = validate_armature(armature)
-        return is_valid
-    
-    def execute(self, context):
-        if not apply_pose_as_rest(
-            context=context,
-            armature_obj=get_active_armature(context),
-            meshes=get_all_meshes(context)
-        ):
-            self.report({'ERROR'}, t("Quick_Access.apply_armature_failed"))
+        except Exception as e:
+            logger.error(f"Failed to stop pose mode: {str(e)}")
+            self.report({'ERROR'}, t("PoseMode.error.stop", error=str(e)))
             return {'CANCELLED'}
 
-        self.report({'INFO'}, t("Tools.apply_pose_as_rest.success"))
+class AvatarToolkit_OT_ApplyPoseAsRest(Operator, BatchPoseOperationMixin):
+    bl_idname = 'avatar_toolkit.apply_pose_as_shapekey'
+    bl_label = t("QuickAccess.apply_pose_as_shapekey.label")
+    bl_description = t("QuickAccess.apply_pose_as_shapekey.desc")
+    bl_options = {'REGISTER', 'UNDO'}
+    
+    shapekey_name: StringProperty(
+        name=t("PoseMode.shapekey.name"),
+        description=t("PoseMode.shapekey.description"),
+        default=t("PoseMode.shapekey.default")
+    )
+
+    def invoke(self, context: Context, event: Event) -> Set[str]:
+        return context.window_manager.invoke_props_dialog(self)
+
+    def execute(self, context: Context) -> Set[str]:
+        try:
+            meshes = get_all_meshes(context)
+            invalid_meshes = self.validate_meshes(meshes)
+            
+            if invalid_meshes:
+                message = "\n".join(f"{mesh.name}: {reason}" for mesh, reason in invalid_meshes)
+                self.report({'WARNING'}, t("PoseMode.skipped_meshes", message=message))
+            
+            valid_meshes = [mesh for mesh in meshes if mesh not in [m for m, _ in invalid_meshes]]
+            
+            with ProgressTracker(context, len(valid_meshes), "Applying Pose as Shape Key") as progress:
+                for mesh_obj in valid_meshes:
+                    if not mesh_obj.data.shape_keys:
+                        mesh_obj.shape_key_add(name=t("PoseMode.basis"))
+                    
+                    new_shape = mesh_obj.shape_key_add(name=self.shapekey_name, from_mix=False)
+                    cached_positions = cache_vertex_positions(
+                        mesh_obj.evaluated_get(context.evaluated_depsgraph_get())
+                    )
+                    apply_vertex_positions(new_shape.data, cached_positions)
+                    progress.step(f"Processed {mesh_obj.name}")
+
             return {'FINISHED'}
+        except Exception as e:
+            logger.error(f"Failed to apply pose as shape key: {str(e)}")
+            self.report({'ERROR'}, t("PoseMode.error.shapekey", error=str(e)))
+            return {'CANCELLED'}
+
+class AvatarToolkit_OT_ApplyPoseAsShapekey(Operator, BatchPoseOperationMixin):
+    bl_idname = 'avatar_toolkit.apply_pose_as_rest'
+    bl_label = t("QuickAccess.apply_pose_as_rest.label")
+    bl_description = t("QuickAccess.apply_pose_as_rest.desc")
+    bl_options = {'REGISTER', 'UNDO'}
+
+    def execute(self, context: Context) -> Set[str]:
+        try:
+            armature_obj = get_active_armature(context)
+            meshes = get_all_meshes(context)
+            
+            invalid_meshes = self.validate_meshes(meshes)
+            if invalid_meshes:
+                message = "\n".join(f"{mesh.name}: {reason}" for mesh, reason in invalid_meshes)
+                self.report({'WARNING'}, t("PoseMode.skipped_meshes", message=message))
+            
+            valid_meshes = [mesh for mesh in meshes if mesh not in [m for m, _ in invalid_meshes]]
+            
+            with ProgressTracker(context, len(valid_meshes) + 2, "Applying Pose as Rest") as progress:
+                success, message = apply_pose_as_rest(context, armature_obj, valid_meshes)
+                if not success:
+                    raise ValueError(message)
+                progress.step("Applied pose to armature")
+            
+            logger.info("Successfully applied pose as rest")
+            return {'FINISHED'}
+        except Exception as e:
+            logger.error(f"Failed to apply pose as rest: {str(e)}")
+            self.report({'ERROR'}, t("PoseMode.error.rest_pose", error=str(e)))
+            return {'CANCELLED'}

resources/translations/en_US.json

@@ -12,6 +12,7 @@
     "Updater.UpdateToLatestButton.label": "Update to {name}",
     "Updater.UpdateToSelectedButton.label": "Update",
     "Updater.currentVersion": "Current Version: {name}",
+    "Updater.selectVersion": "Select Version",
     "Updater.CheckForUpdateButton.desc": "Check for available updates",
     "UpdateToLatestButton.desc": "Update to the latest version",
     "UpdateNotificationPopup.label": "Update Notification",
@@ -36,23 +37,41 @@
     "QuickAccess.export": "Export",
     "QuickAccess.export_fbx": "Export FBX",
     "QuickAccess.export_resonite": "Export to Resonite",
+    "QuickAccess.start_pose_mode.label": "Start Pose Mode",
+    "QuickAccess.start_pose_mode.desc": "Enter pose mode for the selected armature",
+    "QuickAccess.stop_pose_mode.label": "Stop Pose Mode",
+    "QuickAccess.stop_pose_mode.desc": "Exit pose mode and clear transforms",
+    "QuickAccess.apply_pose_as_shapekey.label": "Apply Pose as Shape Key",
+    "QuickAccess.apply_pose_as_shapekey.desc": "Create a new shape key from current pose",
+    "QuickAccess.apply_pose_as_rest.label": "Apply Pose as Rest",
+    "QuickAccess.apply_pose_as_rest.desc": "Apply current pose as rest pose",
+    "QuickAccess.apply_armature_failed": "Failed to apply armature modifications",
 
-    "Quick_Access.start_pose_mode.label": "Start Pose Mode",
-    "Quick_Access.start_pose_mode.desc": "Enter pose mode for the selected armature",
-    "Quick_Access.stop_pose_mode.label": "Stop Pose Mode",
-    "Quick_Access.stop_pose_mode.desc": "Exit pose mode and clear transforms",
-    "Quick_Access.apply_pose_as_shapekey.label": "Apply Pose as Shape Key",
-    "Quick_Access.apply_pose_as_shapekey.desc": "Create a new shape key from current pose",
-    "Quick_Access.apply_pose_as_rest.label": "Apply Pose as Rest",
-    "Quick_Access.apply_pose_as_rest.desc": "Apply current pose as rest pose",
-    "Quick_Access.apply_armature_failed": "Failed to apply armature modifications",
-
-    "Tools.apply_pose_as_rest.success": "Successfully applied pose as rest position",
+    "PoseMode.error.start": "Failed to start pose mode: {error}",
+    "PoseMode.error.stop": "Failed to stop pose mode: {error}",
+    "PoseMode.error.shapekey": "Failed to apply pose as shape key: {error}",
+    "PoseMode.error.rest_pose": "Failed to apply pose as rest: {error}",
+    "PoseMode.shapekey.name": "Shape Key Name",
+    "PoseMode.shapekey.description": "Name for the new shape key",
+    "PoseMode.shapekey.default": "Pose_Shapekey",
+    "PoseMode.skipped_meshes": "Some meshes were skipped:\n{message}",
+    "PoseMode.basis": "Basis",
 
     "Armature.validation.no_armature": "No armature selected",
     "Armature.validation.not_armature": "Selected object is not an armature",
     "Armature.validation.no_bones": "Armature has no bones",
-    "Armature.validation.missing_bone": "Missing essential bone: {bone}",
+    "Armature.validation.basic_check_failed": "Basic armature validation failed",
+    "Armature.validation.missing_bones": "Missing essential bones: {bones}",
+    "Armature.validation.invalid_hierarchy": "Invalid bone hierarchy between {parent} and {child}",
+    "Armature.validation.asymmetric_bones": "Missing symmetric bones for {bone}",
+    "Armature.validation.asymmetric_hand_wrist": "Missing symmetric bones for hands/wrists",
+
+    "Mesh.validation.no_data": "No mesh data",
+    "Mesh.validation.no_vertex_groups": "No vertex groups found",
+    "Mesh.validation.no_armature_modifier": "No armature modifier",
+    "Mesh.validation.valid": "Valid mesh for pose operations",
+
+    "Operation.pose_applied": "Pose applied successfully",
 
     "Scene.avatar_toolkit_updater_version_list.name": "Version List",
     "Scene.avatar_toolkit_updater_version_list.description": "List of available versions"

ui/quick_access_panel.py

@@ -87,9 +87,7 @@ class AvatarToolKit_PT_QuickAccessPanel(Panel):
         # Armature Validation
         active_armature = get_active_armature(context)
         if active_armature:
-            is_valid: bool
-            message: str
-            is_valid, message = validate_armature(active_armature)
+            is_valid, messages = validate_armature(active_armature)
             
             if is_valid:
                 info_box: UILayout = col.box()
@@ -103,6 +101,8 @@ class AvatarToolKit_PT_QuickAccessPanel(Panel):
                     info_box.label(text=t("QuickAccess.pose_bones_available"), icon='POSE_HLT')
             else:
                 col.separator(factor=0.5)
+                # Display each validation message
+                for message in messages:
                     col.label(text=message, icon='ERROR')
 
             # Pose Mode Controls