diff --git a/xo-alloc2/include/xo/alloc2/arena/IAllocIterator_DArenaIterator.hpp b/xo-alloc2/include/xo/alloc2/arena/IAllocIterator_DArenaIterator.hpp
index dfe84005..5af231ac 100644
--- a/xo-alloc2/include/xo/alloc2/arena/IAllocIterator_DArenaIterator.hpp
+++ b/xo-alloc2/include/xo/alloc2/arena/IAllocIterator_DArenaIterator.hpp
@@ -6,7 +6,7 @@
 #pragma once
 
 #include "alloc/IAllocIterator_Xfer.hpp"
-#include "arena/DArenaIterator.hpp"
+#include <xo/arena/DArenaIterator.hpp>
 
 namespace xo {
     namespace mm { struct IAllocIterator_DArenaIterator; }
diff --git a/xo-alloc2/include/xo/alloc2/arena/IAllocator_DArena.hpp b/xo-alloc2/include/xo/alloc2/arena/IAllocator_DArena.hpp
index 9f18adc1..4a871822 100644
--- a/xo-alloc2/include/xo/alloc2/arena/IAllocator_DArena.hpp
+++ b/xo-alloc2/include/xo/alloc2/arena/IAllocator_DArena.hpp
@@ -5,7 +5,7 @@
 
 #include "alloc/AAllocator.hpp"
 #include "alloc/IAllocator_Xfer.hpp"
-#include "arena/DArena.hpp"
+#include <xo/arena/DArena.hpp>
 
 namespace xo {
     namespace mm { struct IAllocator_DArena; }
diff --git a/xo-alloc2/src/alloc2/CMakeLists.txt b/xo-alloc2/src/alloc2/CMakeLists.txt
index d6982bb7..3a279746 100644
--- a/xo-alloc2/src/alloc2/CMakeLists.txt
+++ b/xo-alloc2/src/alloc2/CMakeLists.txt
@@ -9,12 +9,12 @@ set(SELF_SRCS
 
     AAllocator.cpp
 #    ArenaConfig.cpp
-    DArena.cpp
+#    DArena.cpp
     IAllocator_Any.cpp
     IAllocator_DArena.cpp
 
     IAllocIterator_Any.cpp
-    DArenaIterator.cpp
+#    DArenaIterator.cpp
     IAllocIterator_DArenaIterator.cpp
 
     )
diff --git a/xo-alloc2/src/alloc2/IAllocator_DArena.cpp b/xo-alloc2/src/alloc2/IAllocator_DArena.cpp
index ed956240..a3bd9613 100644
--- a/xo-alloc2/src/alloc2/IAllocator_DArena.cpp
+++ b/xo-alloc2/src/alloc2/IAllocator_DArena.cpp
@@ -6,8 +6,8 @@
 #include "AllocIterator.hpp"
 #include "arena/IAllocator_DArena.hpp"
 #include "arena/IAllocIterator_DArenaIterator.hpp" // for alloc_range
-#include "arena/DArenaIterator.hpp"
-#include "padding.hpp"
+#include <xo/arena/DArenaIterator.hpp>
+#include <xo/arena/padding.hpp>
 #include <xo/facet/obj.hpp>
 #include <xo/indentlog/scope.hpp>
 #include <cassert>
diff --git a/xo-alloc2/utest/random_allocs.cpp b/xo-alloc2/utest/random_allocs.cpp
index 654c6c9a..1f7f833f 100644
--- a/xo-alloc2/utest/random_allocs.cpp
+++ b/xo-alloc2/utest/random_allocs.cpp
@@ -4,8 +4,8 @@
  **/
 
 #include "random_allocs.hpp"
-#include "arena/DArena.hpp"
-#include "padding.hpp"
+#include <xo/arena/DArena.hpp>
+#include <xo/arena/padding.hpp>
 #include <xo/indentlog/scope.hpp>
 #include <xo/indentlog/print/tag.hpp>
 #include <catch2/catch.hpp>
diff --git a/xo-alloc2/include/xo/alloc2/arena/DArena.hpp b/xo-arena/include/xo/arena/DArena.hpp
similarity index 98%
rename from xo-alloc2/include/xo/alloc2/arena/DArena.hpp
rename to xo-arena/include/xo/arena/DArena.hpp
index 45556d9f..f9c2e3c6 100644
--- a/xo-alloc2/include/xo/alloc2/arena/DArena.hpp
+++ b/xo-arena/include/xo/arena/DArena.hpp
@@ -8,7 +8,7 @@
 #include "ArenaConfig.hpp"
 #include "AllocError.hpp"
 #include "AllocInfo.hpp"
-#include <xo/facet/typeseq.hpp>
+#include <xo/reflectutil/typeseq.hpp>
 
 namespace xo {
     namespace mm {
@@ -46,7 +46,7 @@ namespace xo {
             /** @brief type for allocation header (if enabled) **/
             using header_type = AllocHeader;
             /** integer identifying a type (see xo::facet::typeid<T>()) **/
-            using typeseq = xo::facet::typeseq;
+            using typeseq = xo::reflect::typeseq;
 
             /** @brief mode argument for @ref _alloc **/
             enum class alloc_mode : uint8_t {
@@ -280,7 +280,7 @@ namespace xo {
         static T *
         construct_with(DArena & ialloc, Args&&... args)
         {
-            using xo::facet::typeseq;
+            using xo::reflect::typeseq;
 
             typeseq t = typeseq::id<T>();
             std::byte * mem = ialloc.alloc(t, sizeof(T));
diff --git a/xo-alloc2/include/xo/alloc2/arena/DArenaIterator.hpp b/xo-arena/include/xo/arena/DArenaIterator.hpp
similarity index 100%
rename from xo-alloc2/include/xo/alloc2/arena/DArenaIterator.hpp
rename to xo-arena/include/xo/arena/DArenaIterator.hpp
diff --git a/xo-arena/src/arena/CMakeLists.txt b/xo-arena/src/arena/CMakeLists.txt
index 806a1fb3..111bbe15 100644
--- a/xo-arena/src/arena/CMakeLists.txt
+++ b/xo-arena/src/arena/CMakeLists.txt
@@ -2,9 +2,11 @@
 
 set(SELF_LIB xo_arena)
 set(SELF_SRCS
+    cmpresult.cpp
     AllocError.cpp
     AllocInfo.cpp
-    cmpresult.cpp
+    DArena.cpp
+    DArenaIterator.cpp
 )
 
 xo_add_shared_library4(${SELF_LIB} ${PROJECT_NAME}Targets ${PROJECT_VERSION} 1 ${SELF_SRCS})
diff --git a/xo-alloc2/src/alloc2/DArena.cpp b/xo-arena/src/arena/DArena.cpp
similarity index 99%
rename from xo-alloc2/src/alloc2/DArena.cpp
rename to xo-arena/src/arena/DArena.cpp
index c20d34b2..5c0e3641 100644
--- a/xo-alloc2/src/alloc2/DArena.cpp
+++ b/xo-arena/src/arena/DArena.cpp
@@ -3,9 +3,9 @@
  *  @author Roland Conybeare, Dec 2025
  **/
 
-#include "alloc/AAllocator.hpp"
-#include "arena/DArena.hpp"
-#include "arena/DArenaIterator.hpp"
+//#include "alloc/AAllocator.hpp"
+#include "DArena.hpp"
+#include "DArenaIterator.hpp"
 #include <xo/arena/padding.hpp>
 #include <xo/indentlog/scope.hpp>
 #include <xo/indentlog/print/tag.hpp>
@@ -15,7 +15,7 @@
 #include <string.h> // for ::memset()
 
 namespace xo {
-    using xo::facet::typeseq;
+    using xo::reflect::typeseq;
     using std::byte;
     using std::cerr;
     using std::endl;
diff --git a/xo-alloc2/src/alloc2/DArenaIterator.cpp b/xo-arena/src/arena/DArenaIterator.cpp
similarity index 98%
rename from xo-alloc2/src/alloc2/DArenaIterator.cpp
rename to xo-arena/src/arena/DArenaIterator.cpp
index b9873e31..931108bb 100644
--- a/xo-alloc2/src/alloc2/DArenaIterator.cpp
+++ b/xo-arena/src/arena/DArenaIterator.cpp
@@ -3,8 +3,8 @@
  *  @author Roland Conybeare, Dec 2025
  **/
 
-#include "arena/DArenaIterator.hpp"
-#include "arena/DArena.hpp"
+#include "DArenaIterator.hpp"
+#include "DArena.hpp"
 #include <xo/indentlog/scope.hpp>
 #include <xo/indentlog/print/tag.hpp>
 #include <cassert>
diff --git a/xo-gc/include/xo/gc/DX1Collector.hpp b/xo-gc/include/xo/gc/DX1Collector.hpp
index 40295b5e..33c9f56d 100644
--- a/xo-gc/include/xo/gc/DX1Collector.hpp
+++ b/xo-gc/include/xo/gc/DX1Collector.hpp
@@ -10,7 +10,7 @@
 #include "object_age.hpp"
 #include "role.hpp"
 #include <xo/alloc2/Allocator.hpp>
-#include <xo/alloc2/arena/DArena.hpp>
+#include <xo/arena/DArena.hpp>
 #include <xo/arena/ArenaConfig.hpp>
 #include <memory>
 #include <array>
diff --git a/xo-gc/include/xo/gc/DX1CollectorIterator.hpp b/xo-gc/include/xo/gc/DX1CollectorIterator.hpp
index af1e867a..98a1f1d2 100644
--- a/xo-gc/include/xo/gc/DX1CollectorIterator.hpp
+++ b/xo-gc/include/xo/gc/DX1CollectorIterator.hpp
@@ -7,8 +7,8 @@
 
 #include "AllocInfo.hpp"
 #include "generation.hpp"
-#include "arena/DArenaIterator.hpp"
-#include "cmpresult.hpp"
+#include <xo/arena/DArenaIterator.hpp>
+#include <xo/arena/cmpresult.hpp>
 
 namespace xo {
     namespace mm {
diff --git a/xo-gc/utest/random_allocs.cpp b/xo-gc/utest/random_allocs.cpp
index 654c6c9a..1f7f833f 100644
--- a/xo-gc/utest/random_allocs.cpp
+++ b/xo-gc/utest/random_allocs.cpp
@@ -4,8 +4,8 @@
  **/
 
 #include "random_allocs.hpp"
-#include "arena/DArena.hpp"
-#include "padding.hpp"
+#include <xo/arena/DArena.hpp>
+#include <xo/arena/padding.hpp>
 #include <xo/indentlog/scope.hpp>
 #include <xo/indentlog/print/tag.hpp>
 #include <catch2/catch.hpp>