diff --git a/xo-alloc2/docs/implementation.rst b/xo-alloc2/docs/implementation.rst
index d0d48127..deb79e8f 100644
--- a/xo-alloc2/docs/implementation.rst
+++ b/xo-alloc2/docs/implementation.rst
@@ -24,8 +24,7 @@ Abstraction tower for *xo-alloc2* components
     |      IAllocator_DArena         |
     +--------------------------------+
     |      IAllocator_Xfer           |
-    +--------------------------------+
-    |      IAllocator_ImplType       |
+    |      IAllocator_Any            |
     +--------------+-----------------+
     |              |    DArena       |
     |  AAllocator  +-----------------+
diff --git a/xo-alloc2/docs/index.rst b/xo-alloc2/docs/index.rst
index aedc0ba5..5c666a37 100644
--- a/xo-alloc2/docs/index.rst
+++ b/xo-alloc2/docs/index.rst
@@ -5,13 +5,11 @@ xo-alloc2 documentation
 
 xo-alloc2 is intended to provide fast vm-aware arena allocation.
 Next-generation version of xo-alloc.
-At present (Dec 2025) xo-alloc is fully functional,
-while xo-alloc2 is aspirational.
 
 Features:
 
 * allocates uncommitted virtual memory, and commits on demand.
-* ses THP (Transparent Huge Pages) when available.
+* uses THP (Transparent Huge Pages) when available.
 
 Implemented using FOMO (faceted rust-like object model) from xo-facet
 
diff --git a/xo-gc/include/xo/gc/gcobject/AGCObject.hpp b/xo-gc/include/xo/gc/AGCObject.hpp
similarity index 100%
rename from xo-gc/include/xo/gc/gcobject/AGCObject.hpp
rename to xo-gc/include/xo/gc/AGCObject.hpp
diff --git a/xo-gc/include/xo/gc/GCObject.hpp b/xo-gc/include/xo/gc/GCObject.hpp
index edc89c32..524002a4 100644
--- a/xo-gc/include/xo/gc/GCObject.hpp
+++ b/xo-gc/include/xo/gc/GCObject.hpp
@@ -5,9 +5,9 @@
 
 #pragma once
 
-#include "gcobject/AGCObject.hpp"
-#include "gcobject/IGCObject_Any.hpp"
-#include "gcobject/IGCObject_Xfer.hpp"
-#include "gcobject/RGCObject.hpp"
+#include "AGCObject.hpp"
+#include "detail/IGCObject_Any.hpp"
+#include "detail/IGCObject_Xfer.hpp"
+#include "detail/RGCObject.hpp"
 
 /* end GCObject.hpp */
diff --git a/xo-gc/include/xo/gc/detail/ACollector.hpp b/xo-gc/include/xo/gc/detail/ACollector.hpp
index 9c32125d..d0d34bd7 100644
--- a/xo-gc/include/xo/gc/detail/ACollector.hpp
+++ b/xo-gc/include/xo/gc/detail/ACollector.hpp
@@ -5,7 +5,7 @@
 
 #pragma once
 
-#include "gcobject/IGCObject_Any.hpp"
+#include "IGCObject_Any.hpp"
 
 #include <xo/facet/facet_implementation.hpp>
 #include <xo/facet/typeseq.hpp>
@@ -34,9 +34,12 @@ namespace xo {
 
             virtual int32_t _typeseq() const noexcept = 0;
 
-            virtual size_type allocated(Copaque d, generation g, role r) const noexcept = 0;
-            virtual size_type reserved(Copaque d, generation g, role r) const noexcept = 0;
-            virtual size_type committed(Copaque d, generation g, role r) const noexcept = 0;
+            virtual size_type allocated(Copaque d,
+                                        generation g, role r) const noexcept = 0;
+            virtual size_type  reserved(Copaque d,
+                                        generation g, role r) const noexcept = 0;
+            virtual size_type committed(Copaque d,
+                                        generation g, role r) const noexcept = 0;
 
             /** install interface @p iface for representation with typeseq @p tseq
              *  in collector @p d.
diff --git a/xo-gc/include/xo/gc/gcobject/IGCObject_Any.hpp b/xo-gc/include/xo/gc/detail/IGCObject_Any.hpp
similarity index 100%
rename from xo-gc/include/xo/gc/gcobject/IGCObject_Any.hpp
rename to xo-gc/include/xo/gc/detail/IGCObject_Any.hpp
diff --git a/xo-gc/include/xo/gc/gcobject/IGCObject_Xfer.hpp b/xo-gc/include/xo/gc/detail/IGCObject_Xfer.hpp
similarity index 100%
rename from xo-gc/include/xo/gc/gcobject/IGCObject_Xfer.hpp
rename to xo-gc/include/xo/gc/detail/IGCObject_Xfer.hpp
diff --git a/xo-gc/include/xo/gc/gcobject/RGCObject.hpp b/xo-gc/include/xo/gc/detail/RGCObject.hpp
similarity index 100%
rename from xo-gc/include/xo/gc/gcobject/RGCObject.hpp
rename to xo-gc/include/xo/gc/detail/RGCObject.hpp
diff --git a/xo-gc/src/gc/IGCObject_Any.cpp b/xo-gc/src/gc/IGCObject_Any.cpp
index 22e1cf48..0de21224 100644
--- a/xo-gc/src/gc/IGCObject_Any.cpp
+++ b/xo-gc/src/gc/IGCObject_Any.cpp
@@ -3,7 +3,7 @@
  *  @author Roland Conybeare, Dec 2025
  **/
 
-#include "gcobject/IGCObject_Any.hpp"
+#include "detail/IGCObject_Any.hpp"
 #include <iostream>
 
 namespace xo {
diff --git a/xo-object2/include/xo/object2/IGCObject_DFloat.hpp b/xo-object2/include/xo/object2/IGCObject_DFloat.hpp
index b00873c8..1916f7e2 100644
--- a/xo-object2/include/xo/object2/IGCObject_DFloat.hpp
+++ b/xo-object2/include/xo/object2/IGCObject_DFloat.hpp
@@ -6,8 +6,8 @@
 #pragma once
 
 #include <xo/alloc2/alloc/AAllocator.hpp>
-#include <xo/gc/gcobject/AGCObject.hpp>
-#include <xo/gc/gcobject/IGCObject_Xfer.hpp>
+#include <xo/gc/AGCObject.hpp>
+#include <xo/gc/detail/IGCObject_Xfer.hpp>
 #include "DFloat.hpp"
 
 namespace xo {
diff --git a/xo-object2/include/xo/object2/IGCObject_DInteger.hpp b/xo-object2/include/xo/object2/IGCObject_DInteger.hpp
index 858856b9..69620b57 100644
--- a/xo-object2/include/xo/object2/IGCObject_DInteger.hpp
+++ b/xo-object2/include/xo/object2/IGCObject_DInteger.hpp
@@ -6,8 +6,8 @@
 #pragma once
 
 #include "xo/alloc2/alloc/AAllocator.hpp"
-#include <xo/gc/gcobject/AGCObject.hpp>
-#include <xo/gc/gcobject/IGCObject_Xfer.hpp>
+#include <xo/gc/AGCObject.hpp>
+#include <xo/gc/detail/IGCObject_Xfer.hpp>
 #include "DInteger.hpp"
 
 namespace xo {
diff --git a/xo-object2/include/xo/object2/IGCObject_DList.hpp b/xo-object2/include/xo/object2/IGCObject_DList.hpp
index b4f47c8e..927feb74 100644
--- a/xo-object2/include/xo/object2/IGCObject_DList.hpp
+++ b/xo-object2/include/xo/object2/IGCObject_DList.hpp
@@ -8,8 +8,8 @@
 #include <xo/alloc2/alloc/AAllocator.hpp>
 #include <xo/alloc2/alloc/RAllocator.hpp>
 #include <xo/gc/Collector.hpp>
-#include <xo/gc/gcobject/AGCObject.hpp>
-#include <xo/gc/gcobject/IGCObject_Xfer.hpp>
+#include <xo/gc/AGCObject.hpp>
+#include <xo/gc/detail/IGCObject_Xfer.hpp>
 #include "DList.hpp"
 
 namespace xo {
diff --git a/xo-tokenizer/docs/implementation.rst b/xo-tokenizer/docs/implementation.rst
index 3f617e4d..1063f4fa 100644
--- a/xo-tokenizer/docs/implementation.rst
+++ b/xo-tokenizer/docs/implementation.rst
@@ -11,7 +11,7 @@ Library dependency tower for *xo-tokenizer*:
 .. ditaa::
 
     +-----------------+
-    |     xo_unit     |
+    |  xo_tokenizer   |
     +-----------------+
     |  xo_indentlog   |
     +-----------------+