diff --git a/CMakeLists.txt b/CMakeLists.txt
index e1804f2..ad8a4cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,6 +25,10 @@ add_subdirectory(utest)
 
 set(SELF_LIB xo_facet)
 xo_add_headeronly_library(${SELF_LIB})
+
+# note: dependencies here must coordinate with cmake/xo_facetConfig.cmake.in
+xo_headeronly_dependency(${SELF_LIB} xo_reflectutil)
+
 xo_install_library4(${SELF_LIB} ${PROJECT_NAME}Targets)
 xo_export_cmake_config(${PROJECT_NAME} ${PROJECT_VERSION} ${PROJECT_NAME}Targets)
 
diff --git a/cmake/xo_facetConfig.cmake.in b/cmake/xo_facetConfig.cmake.in
index c25a5c2..8870982 100644
--- a/cmake/xo_facetConfig.cmake.in
+++ b/cmake/xo_facetConfig.cmake.in
@@ -1,7 +1,7 @@
 @PACKAGE_INIT@
 
 include(CMakeFindDependencyMacro)
-#find_dependency(indentlog)
-#find_dependency(xo_flatstring)
+# note: dependencies here must coordinate with xo-facet/CMakeLists.txt
+find_dependency(xo_reflectutil)
 include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")
 check_required_components("@PROJECT_NAME@")
diff --git a/include/xo/facet/typeseq.hpp b/include/xo/facet/typeseq.hpp
index ab85821..23b84a9 100644
--- a/include/xo/facet/typeseq.hpp
+++ b/include/xo/facet/typeseq.hpp
@@ -1,87 +1,19 @@
 /** @file typeseq.hpp
+ *
+ *  @brief Re-export typeseq from xo-arena for backwards compatibility
  *
  *  @author Roland Conybeare, Dec 2025
  **/
 
 #pragma once
 
-#include <iostream>
-#include <cstdint>
+#include <xo/reflectutil/typeseq.hpp>
 
 namespace xo {
     namespace facet {
-        /**
-         * Tag here so we can preserve header-only implementation
-         * and still have static variable
-         */
-        template<typename Tag = class typeseq_tag>
-        struct typeseq_impl {
-            explicit typeseq_impl(int32_t s) : seqno_{s} {}
-
-            /** Can't have this be constexpr.
-             *  We need ids in shared libraries to be generated
-             *  at load time to avoid false positives
-             *
-             *  Return unique id number for each type.
-             *  Numbers are sequentially allocated, so can use
-             *  as vector indices
-             *
-             *  Conversely note that built-in typeinfo may
-             *  return false negatives across library boundaries
-             *  when using clang.
-             **/
-            template <typename T>
-            static typeseq_impl<Tag> id() {
-                static bool armed = true;
-                static int32_t id = 0;
-
-                if (armed) {
-                    armed = false;
-                    id = ++s_next_id;
-                }
-
-                return typeseq_impl(id);
-
-            }
-
-            /** 'anonymous' sentinel type.
-             *  Niche uses for this, e.g. untyped allocator
-             **/
-            static typeseq_impl<Tag> anon() {
-                return typeseq_impl(-1);
-            }
-
-            int32_t seqno() const { return seqno_; }
-
-        private:
-            static int32_t s_next_id;
-
-            int32_t seqno_;
-        };
-
-        template <typename Tag>
-        int32_t typeseq_impl<Tag>::s_next_id = 0;
-
-        template <typename Tag>
-        inline bool
-        operator==(const typeseq_impl<Tag> & lhs, const typeseq_impl<Tag> & rhs) {
-            return lhs.seqno() == rhs.seqno();
-        }
-
-        template <typename Tag>
-        inline bool
-        operator!=(const typeseq_impl<Tag> & lhs, const typeseq_impl<Tag> & rhs) {
-            return lhs.seqno() != rhs.seqno();
-        }
-
-        template <typename Tag>
-        inline std::ostream &
-        operator<<(std::ostream & s, const typeseq_impl<Tag> & x) {
-            s << x.seqno();
-            return s;
-        }
-
-        using typeseq = typeseq_impl<>;
+        // Re-export from xo::arena namespace
+        using xo::reflect::typeseq_impl;
+        using xo::reflect::typeseq;
     }
 } /*namespace xo*/