diff --git a/docs/superpowers/specs/2026-08-28-site-overhead-monthly-and-oneoff-design.md b/docs/superpowers/specs/2026-08-28-site-overhead-monthly-and-oneoff-design.md
index 3b8ad96..44ccbb4 100644
--- a/docs/superpowers/specs/2026-08-28-site-overhead-monthly-and-oneoff-design.md
+++ b/docs/superpowers/specs/2026-08-28-site-overhead-monthly-and-oneoff-design.md
@@ -101,6 +101,7 @@ is_recurring?: boolean
 ```
 
 - Two stacked `<table>` blocks inside the same `Card`. Each section is collapsible (default open) with a count chip.
+- Card subtitle updates from "Monthly preliminaries & general running costs." to "Preliminaries & general running costs — monthly and one-off." to reflect the new content.
 - One-off section columns: Description / Notes / Date / **Cost** / Daily (= cost ÷ 21, shown for parity only — never used in math) / % of P&G total.
 - Monthly section keeps the exact columns it has today.
 - Single `+ Add` button at top-right. Opens a dialog.