diff --git a/docs/exec-plans/active/20260407-formdsl-dgsem-multipatch-compatibility-semantics.md b/docs/exec-plans/completed/20260407-formdsl-dgsem-multipatch-compatibility-semantics.md
similarity index 100%
rename from docs/exec-plans/active/20260407-formdsl-dgsem-multipatch-compatibility-semantics.md
rename to docs/exec-plans/completed/20260407-formdsl-dgsem-multipatch-compatibility-semantics.md
diff --git a/docs/formdsl-nurbs-multipatch-evaluation.md b/docs/formdsl-nurbs-multipatch-evaluation.md
index e00106e..13405bd 100644
--- a/docs/formdsl-nurbs-multipatch-evaluation.md
+++ b/docs/formdsl-nurbs-multipatch-evaluation.md
@@ -56,10 +56,10 @@ Implication:
 
 ## Tracking
 
-- Active OpenSpec change:
-  `openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/`
-- Active execution plan:
-  `docs/exec-plans/active/20260407-formdsl-dgsem-multipatch-compatibility-semantics.md`
+- DG-SEM compatibility archive:
+  `openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/`
+- DG-SEM compatibility completed plan:
+  `docs/exec-plans/completed/20260407-formdsl-dgsem-multipatch-compatibility-semantics.md`
 - Per-interface controls archive:
   `openspec/changes/archive/2026-04-07-formdsl-iga-multipatch-interface-controls/`
 - Per-interface controls completed plan:
diff --git a/docs/ufl-backend-support.md b/docs/ufl-backend-support.md
index c78afd2..3d293f7 100644
--- a/docs/ufl-backend-support.md
+++ b/docs/ufl-backend-support.md
@@ -190,7 +190,7 @@ These are tracked outcomes from the Phase 3 backlog tasks:
   `openspec/changes/archive/2026-04-07-formdsl-iga-multipatch-interface-controls/`
   and
   `docs/exec-plans/completed/20260407-formdsl-iga-multipatch-interface-controls.md`.
-  DG-SEM multipatch compatibility diagnostics are tracked in active change
-  `openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/` and
-  active plan
-  `docs/exec-plans/active/20260407-formdsl-dgsem-multipatch-compatibility-semantics.md`.
+  DG-SEM multipatch compatibility diagnostics are completed and tracked in
+  `openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/`
+  and
+  `docs/exec-plans/completed/20260407-formdsl-dgsem-multipatch-compatibility-semantics.md`.
diff --git a/openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/.openspec.yaml b/openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/.openspec.yaml
similarity index 100%
rename from openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/.openspec.yaml
rename to openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/.openspec.yaml
diff --git a/openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/design.md b/openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/design.md
similarity index 100%
rename from openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/design.md
rename to openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/design.md
diff --git a/openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/proposal.md b/openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/proposal.md
similarity index 100%
rename from openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/proposal.md
rename to openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/proposal.md
diff --git a/openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/specs/form-dsl-backend-assembly/spec.md b/openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/specs/form-dsl-backend-assembly/spec.md
similarity index 100%
rename from openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/specs/form-dsl-backend-assembly/spec.md
rename to openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/specs/form-dsl-backend-assembly/spec.md
diff --git a/openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/tasks.md b/openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/tasks.md
similarity index 100%
rename from openspec/changes/formdsl-dgsem-multipatch-compatibility-semantics/tasks.md
rename to openspec/changes/archive/2026-04-07-formdsl-dgsem-multipatch-compatibility-semantics/tasks.md