diff -r b57c95a0f5f9 -r 0c70d888a484 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Tue Aug 16 18:20:42 2022 +0200
+++ b/mercurial/localrepo.py	Tue Aug 16 19:04:23 2022 +0200
@@ -1281,6 +1281,7 @@
     """
 
     _basesupported = {
+        requirementsmod.ARCHIVED_PHASE_REQUIREMENT,
         requirementsmod.BOOKMARKS_IN_STORE_REQUIREMENT,
         requirementsmod.CHANGELOGV2_REQUIREMENT,
         requirementsmod.COPIESSDC_REQUIREMENT,
@@ -3664,6 +3665,10 @@
     if ui.configbool(b'format', b'internal-phase'):
         requirements.add(requirementsmod.INTERNAL_PHASE_REQUIREMENT)
 
+    # experimental config: format.exp-archived-phase
+    if ui.configbool(b'format', b'exp-archived-phase'):
+        requirements.add(requirementsmod.ARCHIVED_PHASE_REQUIREMENT)
+
     if createopts.get(b'narrowfiles'):
         requirements.add(requirementsmod.NARROW_REQUIREMENT)