diff --git a/manyfold/root/hook.d/inotify_MODIFY/package_xrf.rb b/manyfold/root/hook.d/inotify_MODIFY/package_xrf.rb
new file mode 100755
index 0000000..5df8c75
--- /dev/null
+++ b/manyfold/root/hook.d/inotify_MODIFY/package_xrf.rb
@@ -0,0 +1,90 @@
+#!/usr/bin/env ruby
+
+require 'json'
+
+extensions = ['.glb', '.gltf', '.blend', '.usdz', '.obj', '.dae']
+
+# Check if a filename is provided
+if ARGV.length != 1
+  puts "Usage: #{$0} <filename>"
+  exit 1
+end
+
+def log_message(message, filename, reset = false)
+
+  # Empty the log file if reset is true
+  if reset
+    File.open(filename, 'w') do |file|
+      timestamp = Time.now.strftime('%Y-%m-%d %H:%M')
+      file.write("#{timestamp}\n\n")
+    end
+  end
+
+  # Create the full log entry
+
+  # Append the log entry to the log file
+  File.open(filename, 'a') do |file|
+    file.write("#{message}\n")
+  end
+  puts("#{message}\n")
+end
+
+filename = ARGV[0]
+
+begin
+  # Read and parse the JSON file
+  data = JSON.parse(File.read(filename))
+
+  logfile = File.join( File.dirname(filename), "xrfragment.txt" )
+
+  log_message("✔ starting XR fragments check", logfile, true)
+
+  # Extract the desired field (assuming the field is named 'model_file')
+  thumb_file = data['image']
+  log_message("✔ thumbnail sidecar-file '#{thumb_file}' detected", logfile)
+  
+  # Get the base name of the thumbnail file without its extension
+  base_name = File.basename(thumb_file, File.extname(thumb_file))
+  
+  model_file = nil # Initialize model_file to nil
+  
+  # Loop over the list of extensions
+  extensions.each do |ext|
+    # Construct the filename with the current extension
+    filename = "#{base_name}#{ext}"
+  
+    # Check if the file exists
+    if File.exist?(filename)
+      log_message("✔ 3D file '#{filename}' detected", logfile)
+      model_file = filename # Store the found filename
+      break # Stop the loop once a file is found
+    else
+      # Log a message for the file that was not found, but don't stop
+      log_message("⚠️ 3D file '#{filename}' not detected", logfile)
+    end
+  end
+  
+  # Check if a model file was found after the loop
+  if model_file
+    log_message("✅ Final model file: '#{model_file}'", logfile)
+  else
+    log_message("❌ No suitable 3D file found for XR Fragments-compatible experience", logfile)
+  end
+
+  # Construct the output filename
+  output_file = "#{File.basename(model_file, File.extname(model_file))}.blend"
+
+  # Execute the system call
+  puts("assimp", model_file, output_file)
+  system("assimp", model_file, output_file)
+
+rescue Errno::ENOENT
+  puts "File #{filename} not found"
+rescue JSON::ParserError
+  puts "Error parsing JSON from #{filename}"
+rescue => e
+  puts "An error occurred: #{e.message}"
+end
+
+
+log_message("", logfile)