refactor: derive turtle opcodes from classic

include/game/opcode_aliases_generated.inc

@@ -41,5 +41,4 @@
     {"SMSG_SPLINE_MOVE_SET_RUN_BACK_SPEED", "SMSG_SPLINE_SET_RUN_BACK_SPEED"},
     {"SMSG_SPLINE_MOVE_SET_RUN_SPEED", "SMSG_SPLINE_SET_RUN_SPEED"},
     {"SMSG_SPLINE_MOVE_SET_SWIM_SPEED", "SMSG_SPLINE_SET_SWIM_SPEED"},
-    {"SMSG_UPDATE_AURA_DURATION", "SMSG_EQUIPMENT_SET_SAVED"},
     {"SMSG_VICTIMSTATEUPDATE_OBSOLETE", "SMSG_BATTLEFIELD_PORT_DENIED"},

include/game/opcode_table.hpp

@@ -33,7 +33,10 @@ class OpcodeTable {
 public:
     /**
      * Load opcode mappings from a JSON file.
-     * Format: { "CMSG_PING": "0x1DC", "SMSG_AUTH_CHALLENGE": "0x1EC", ... }
+     * Format:
+     * { "CMSG_PING": "0x1DC", "SMSG_AUTH_CHALLENGE": "0x1EC", ... }
+     * or a delta file with:
+     * { "_extends": "../classic/opcodes.json", "_remove": ["MSG_FOO"], ...overrides }
      */
     bool loadFromJson(const std::string& path);
 

include/game/packet_parsers.hpp

@@ -439,14 +439,16 @@ public:
 };
 
 /**
- * Turtle WoW (build 7234) packet parsers.
+ * Turtle WoW packet parsers.
  *
- * Turtle WoW is a heavily modified vanilla server that sends TBC-style
- * movement blocks (moveFlags2, transport timestamps, 8 speeds including flight)
- * while keeping all other Classic packet formats.
+ * Turtle is Classic-based but not wire-identical to vanilla MaNGOS. It keeps
+ * most Classic packet formats, while overriding the movement-bearing paths that
+ * have proven to vary in live traffic:
+ * - update-object movement blocks use a Turtle-specific hybrid layout
+ * - update-object parsing falls back through Classic/TBC/WotLK movement layouts
+ * - monster-move parsing falls back through Vanilla, TBC, and guarded WotLK layouts
  *
- * Inherits all Classic overrides (charEnum, chat, gossip, mail, items, etc.)
- * but delegates movement block parsing to TBC format.
+ * Everything else inherits the Classic parser behavior.
  */
 class TurtlePacketParsers : public ClassicPacketParsers {
 public: