Support Semuta after Box searches during bidding

docs/SEMUTA_DISCARD_CONTINUATIONS.md

@@ -2,6 +2,30 @@
 
 Read-only engine audit, 2026-09-07. Read the complete `docs/SEMUTA_DRUG_ENGINE_AUDIT.md`, then inspected every current `discard(...)` call, direct Treachery-discard mutation and `draw(g)` caller in `game/engine.ts`, plus the Truthtrance discard callback and pure Box/Distrans results. Names below are integration anchors; approximate current lines are navigation aids only. This report adopts no additional source ruling and changes no project file.
 
+## Completed Box search during Basic bidding — 28 October 2026
+
+**Prototyped / Partial.** In the supported bare Basic Semuta profile, a
+completed paid Nullentropy Box search may offer the discarded physical Box
+to Semuta while a clean ordinary auction or a Richese Once Around or Silent
+cache lot is active. The owner has already paid two spice, selected the
+recovered card and shuffled the remainder. Claim or pass leaves that exchange
+and payment committed and resumes the original auction without a second
+search or payment.
+
+The new continuation binds the existing auction, bidding order, public or
+sealed bids, funding, pledges and player spice. Its auction clock is excluded
+because the existing decision pauses it. The Box is the fresh discard; the
+privately recovered card and other cards in the shuffled pile are not fresh
+Semuta targets. A saved older Box-discard continuation without the optional
+auction binding retains its prior behavior. This scope excludes Black Market,
+completed sale and other optional-module compositions.
+
+The scoped tests use real auction actions with conserved staging of physical
+Box and discard cards. They do not constitute full-game or deployed
+acceptance. The rule source does not specify an online suspension or priority
+protocol for this combination; the preserved continuation is a software
+interpretation. [Source scope](SEMUTA_SOURCE_UPDATE_20260907.md#completed-box-search-during-basic-auctions--28-october-2026).
+
 ## Native Moritani retention and initial battle discards — 28 October 2026
 
 In the supported bare Basic Semuta profile, a defeated ally of native Moritani