diff --git a/workplans/archived/260518-PMEM-MATURITY-SCORECARD.md b/workplans/archived/260518-PMEM-MATURITY-SCORECARD.md
index 58605a3..8bdffcd 100644
--- a/workplans/archived/260518-PMEM-MATURITY-SCORECARD.md
+++ b/workplans/archived/260518-PMEM-MATURITY-SCORECARD.md
@@ -11,6 +11,8 @@ updated: "2026-05-18"
 state_hub_workstream_id: "e82b1c2d-0c5e-47d3-9627-f85e7173dcbe"
 ---
 
+> **Terminology note:** Historical text in this archived workplan may use the legacy term "workstream". The fleet term is **workplan** (`canon/standards/workplan-terminology-fleet_v0.1.md`).
+
 # Phase Memory Maturity Scorecard
 
 ## Purpose