diff --git a/docs/plans/2026-09-12_control-board-mvp.md b/docs/plans/2026-09-12_control-board-mvp.md
index b9ba82e1..0de75a8d 100644
--- a/docs/plans/2026-09-12_control-board-mvp.md
+++ b/docs/plans/2026-09-12_control-board-mvp.md
@@ -203,3 +203,10 @@ tool call, or a tool result with no assistant text after it, the state is
 is text only and whose turn has ended. Verify with one live seat caught
 mid-tool-call and one that has finished a turn; add a fixture test for
 each so the rule cannot regress silently.
+
+**2026-09-12 — Jason chose Dewey design 3 (Console) as the WebUI starting
+point.** This answers task D05 and lifts the "chosen against a board Jason has
+used" hold above: the selection is made, on evidence from today's use. It does
+not start WebUI build work. Sequence stays: seat registration via
+`mosaic launch` (in progress), then reply-from-board, then the WebUI on the
+Console design absorbs the board as its first screen.