Connect independent-card battle and arrival reactions

docs/SEMUTA_DISCARD_CONTINUATIONS.md

@@ -1,5 +1,17 @@
 # Semuta discard producers and continuation inventory
 
+## Battle cleanup in Basic independent cards — 28 October 2026
+
+**Prototyped / Partial.** In the existing Richese/classic independent-card
+preview, the losing mandatory batch, winning mandatory batch and the winner's
+selected discard batch each offer their actual public cards to Semuta. This
+includes played Reinforcements and Harass & Withdraw when discarded, while
+cards the winner keeps remain in hand. Combat results, physical costs and
+casualties remain committed and each native cleanup resumes once. Earlier
+saved discard continuations without an offer continue without gaining a new
+one. This ordering is provisional; other discard producers and other
+roster/module combinations remain separate.
+
 ## Ordinary specials in Basic independent cards — 28 October 2026
 
 **Prototyped / Partial.** The same fresh Basic Richese/classic independent-card