diff --git a/docs/PRD.md b/docs/PRD.md
index a8efc381..d394144c 100644
--- a/docs/PRD.md
+++ b/docs/PRD.md
@@ -197,7 +197,6 @@ conflict must amend one of them explicitly, never fork a third document
 - A second writable task store beside PostgreSQL (native-kanban-sot invariants).
 - Fully-designed federation in v1 (D3 — roadmap placeholder only).
 
-#
 ### D15 — Tiered containerized deployment (2026-08-30, containerization lane)
 
 The stack ships a tiered deployment target, additive to the architecture
@@ -232,6 +231,7 @@ docs/plans/2026-08-30_containerization.md.
 | D12 | HARD RULE: webUI never bypasses tooling; missing tool ⇒ build the tool first                                       |
 | D13 | workspace_id stays the hard isolation unit; hierarchy is parent structure above; kanban SOT amended, not rewritten |
 | D14 | Sensitive profile data in the user's own brain only; postgres holds structure/consent/pointers                     |
+| D15 | Tiered containerized deployment: compose standalone tier (five-point v1 bar) + phase-gated k8s enterprise tier; registry-only image source | 2026-08-30 containerization lane; plan docs/plans/2026-08-30_containerization.md |
 
 The full decision texts are recorded in the operator decision log (USC estate
 brain, webui-audit lane, `GRILL.md`).