diff --git a/include/xo/gc/AGCObject.hpp b/include/xo/gc/AGCObject.hpp
deleted file mode 100644
index 1e0a6d4..0000000
--- a/include/xo/gc/AGCObject.hpp
+++ /dev/null
@@ -1,53 +0,0 @@
-/** @file AGCObject.hpp
- *
- *  @author Roland Conybeare, Dec 2025
- **/
-
-#pragma once
-
-#include "Allocator.hpp"
-#include "xo/facet/facet_implementation.hpp"
-#include "xo/facet/typeseq.hpp"
-#include "xo/facet/obj.hpp"   // for obj<AAllocator> in shallow_copy
-#include <cstdint>
-#include <cstddef>
-
-namespace xo {
-    namespace mm {
-        using Copaque = const void *;
-        using Opaque = void *;
-
-        /** @class AObject
-         *  @brief Abstract facet for collector-eligible data
-         *
-         *  Data that supports AGCObject can have memory managed
-         *  by ACollector
-         **/
-        struct AGCObject {
-            using size_type = std::size_t;
-
-            /** RTTI: unique id# for actual runtime data representation **/
-            virtual int32_t _typeseq() const noexcept = 0;
-
-            virtual size_type shallow_size(Copaque d) const noexcept = 0;
-            virtual Opaque * shallow_copy(Copaque d,
-                                          obj<AAllocator> mm) const noexcept = 0;
-            virtual size_type forward_children(Opaque d) const noexcept = 0;
-        };
-
-        // implementation IGCObject_DRepr of AGCObject for state DRepr
-        // should provide a specialization:
-        //
-        //   template <>
-        //   struct xo::facet::FacetImplementation<AGCObjectx, DRepr> {
-        //       using ImplType = IGCObject_DRepr;
-        //   };
-        //
-        //   then IGCObject_ImplType<DRepr> --> IGCObject_DRepr
-        //
-        template <typename DRepr>
-        using IGCObject_ImplType = xo::facet::FacetImplType<AGCObject, DRepr>;
-    } /*namespace mm*/
-} /*namespace xo*/
-
-/* end AGCObject.hpp */
diff --git a/include/xo/gc/GCObject.hpp b/include/xo/gc/GCObject.hpp
index 524002a..2674b2a 100644
--- a/include/xo/gc/GCObject.hpp
+++ b/include/xo/gc/GCObject.hpp
@@ -5,7 +5,7 @@
 
 #pragma once
 
-#include "AGCObject.hpp"
+#include "detail/AGCObject.hpp"
 #include "detail/IGCObject_Any.hpp"
 #include "detail/IGCObject_Xfer.hpp"
 #include "detail/RGCObject.hpp"
diff --git a/include/xo/gc/detail/ACollector.hpp b/include/xo/gc/detail/ACollector.hpp
index d0d34bd..24bd219 100644
--- a/include/xo/gc/detail/ACollector.hpp
+++ b/include/xo/gc/detail/ACollector.hpp
@@ -27,7 +27,7 @@ namespace xo {
         /** @class ACollector
          *  @brief Abstract facet for the XO garbage collector
          *
-         *  Collector also supports the @ref AAllocator facet, see also
+         *  A collector implementation will also support the @ref AAllocator facet, see also
          **/
         struct ACollector {
             using size_type = std::size_t;