diff --git a/src/impl/dgb/coin/node.hpp b/src/impl/dgb/coin/node.hpp
index 7d7a05737..18e58ad07 100644
--- a/src/impl/dgb/coin/node.hpp
+++ b/src/impl/dgb/coin/node.hpp
@@ -13,6 +13,16 @@
 // The ctor keeps btc's (context, config) shape via auto params (no boost
 // include needed in the stub) so M3 restores the body without re-typing
 // construction sites.
+//
+// AuxPoW / merged-mining seam (V36 reality): DGB-Scrypt is a STANDALONE parent in
+// the default build and validates Scrypt blocks ONLY -- there is no AuxPoW path in
+// the default c2pool-dgb. Merged-mining is the DOGE-only stretch, compiled solely
+// under -DAUX_DOGE=ON, where the shared src/impl/doge/coin/aux_* module (owned by
+// ltc-doge; dgb CONSUMES, never modifies) supplies the AuxPoW header / raw-block
+// parsers that the M3 NodeP2P will bind. The other four DGB algos (SHA256d, Skein,
+// Qubit, Odocrypt) are accept-by-continuity / ignored in V36 -- never validated
+// here. p2pool-merged-v36 parity preserved. Signature only below; body lands with
+// NodeP2P at M3.
 // ---------------------------------------------------------------------------
 
 #include <memory>
@@ -20,12 +30,33 @@
 #include "node_interface.hpp"
 #include "rpc.hpp"
 
+#ifdef AUX_DOGE
+// DOGE merged-mining aux module (STRETCH; -DAUX_DOGE=ON only). dgb CONSUMES the
+// shared aux types; ltc-doge owns and is the sole modifier of src/impl/doge/coin/aux_*.
+// Forward declaration only at slice #3 -- the real
+// <impl/doge/coin/aux_chain_embedded.hpp> include lands with the
+// bind_aux_doge_parsers() body at M3.
+namespace doge { namespace coin { class AuxChainEmbedded; } }
+#endif
+
 namespace dgb
 {
 
 namespace coin
 {
 
+#ifdef AUX_DOGE
+// ---------------------------------------------------------------------------
+// DOGE merged-mining aux seam -- header-only type alias (slice #3, option b per
+// integrator UID-904). Names the shared src/impl/doge aux-module backend that
+// bind_aux_doge_parsers() wires onto the (M3) coin P2P layer. No new TU; no
+// effect on the default Scrypt-only standalone build (which never defines
+// AUX_DOGE). The structured parsers consumed at M3 bind time are the free
+// functions doge::coin::parse_doge_header / parse_doge_headers_message /
+// parse_doge_block (auxpow_header.hpp). Parity: p2pool-merged-v36.
+using AuxChainBackend = ::doge::coin::AuxChainEmbedded;   // IAuxChainBackend impl
+#endif
+
 template <typename ConfigType>
 class Node : public dgb::interfaces::Node
 {
@@ -48,6 +79,13 @@ class Node : public dgb::interfaces::Node
     }
 
     NodeRPC* rpc() { return m_rpc.get(); }
+
+#ifdef AUX_DOGE
+    // DOGE merged-mining aux seam (STRETCH; -DAUX_DOGE=ON only). Binds the shared
+    // src/impl/doge aux module's parsers onto the (M3) coin P2P layer. Declaration
+    // only -- no body until NodeP2P is ported. Parity: p2pool-merged-v36.
+    void bind_aux_doge_parsers();
+#endif
 };
 
 } // namespace coin