Updated to be pure bash and remove references to the web pages.

matter-decode.sh

@@ -2,9 +2,9 @@
 #
 # matter-decode.sh — decode a Matter commissioning QR code (MT: URI) from the CLI.
 #
-# This is a bash port of the decode logic in matter-qr-decoder.html (the browser
-# app's camera/QR-scanning feature has no shell equivalent and is intentionally
-# omitted). It decodes the 84-bit payload and prints the same fields the web UI shows.
+# This decodes the Matter 84-bit payload (the format a Matter/CHIP commissioning
+# QR encodes) and prints the fields a commissioning app (Apple Home, Google Home,
+# the Matter app) needs to pair with the device.
 #
 # Usage:
 #   ./matter-decode.sh "MT:..."