Guard Duke grants using public capture uncertainty

docs/CURRENT_STATUS.md

@@ -17,6 +17,16 @@ open mode gates.
 
 ## Current checkpoint and work
 
+**Duke Ambassador capture uncertainty — 29 October. Prototyped / Partial.**
+Fresh games track whether a public Harkonnen capture could have involved Duke,
+independent of the secret selection. When capture history is uncertain, direct
+acquisition and the automatic alliance loan are uniformly guarded; unstamped
+older games remain conservative. A plain Advanced Ecaz–Harkonnen game can use
+both grants while its public history rules out capture. Eight related files pass
+62 cases, including real setup and capture; broader combinations, resolving
+uncertainty later, and deployed verification remain open.
+[Scope](ECAZ_DUKE_ACQUISITION.md#public-capture-uncertainty--29-october-2026).
+
 **Concealed Duke and Ghola guidance — 29 October. Prototyped / Partial.**
 Ecaz's Ghola choices now use the same projected Duke state as ordinary revival,
 so secretly executing another player's Duke captive no longer changes that