Preflight Homeworld-sourced AI arrival overlaps

docs/BOT_ARRIVAL_PREFLIGHT.md

@@ -36,10 +36,14 @@ and Face Dancers are unnecessary. It does not mutate the view or sample
 randomness. Only the known typed arrival error excludes a candidate; unexpected
 faults propagate. The engine remains authoritative for every actual action.
 
-Homeworlds, explicit Nexus shipments, special movement and unrecognized action
-shapes retain their existing adapters and legal fallback search. They are not
-classified as illegal by this narrower preview. This is not a complete action
-validator or certification that every AI candidate in every module is legal.
+Homeworld-sourced ordinary shipments now quote the same public arrival triggers,
+including a colocated Ambassador and Terror, after the bot selects its own
+physical source. Their off-planet origin is sufficient for the arrival quote;
+Homeworld source eligibility, tariffs and any payment-dependent Guild response
+remain authoritative engine checks, not duplicated AI rules. Other Homeworld
+routes, explicit Nexus shipments, special movement and unrecognized actions
+retain their own adapters and legal fallback search. This is not a complete
+action validator or certification that every AI candidate is legal.
 
 ## Evidence
 
@@ -53,3 +57,18 @@ stance settlement does not turn a lone advisor group into fighters.
 Final checks and same-seed integrated results are recorded with the source-bound
 private checkpoint and Git message. Existing saved games remain protected; no
 server restart or database change is required.
+
+## 29 September: Homeworld-sourced shipment overlap
+
+A genuine five-seat Advanced combined Homeworld/Nexus/expansion game on
+`41fd6fe` completed in 786 actions but proposed two Tleilaxu shipments from
+its own Homeworld into unsupported Ambassador/Terror arrival combinations.
+Both were rejected without writes before a legal alternative was chosen. The
+owner-view preflight formerly skipped every Homeworld shipment. It now passes
+off-planet Homeworld-source arrivals through the same public quote without
+assuming a price or hidden Terror face. All four AI profiles exclude the
+reproduced action while retaining an executable alternative. A same-seed
+genuine-setup replay completes in 786 accepted attempts, zero rejections,
+21 JSON continuations and the same fourth-turn shared victory. This repairs
+candidate legality, not the unsupported arrival-rule composition or public
+expansion start gate.

docs/CURRENT_STATUS.md

@@ -6,6 +6,14 @@ Expansion starts and full rules/publication acceptance remain gated.**
 
 ## Current checkpoint and work
 
+A five-seat Advanced combined Homeworld/Nexus/expansion sample exposed two
+known-unsupported Ecaz Ambassador/Moritani Terror shipment candidates from
+Tleilaxu's own Homeworld. [AI arrival preflight](BOT_ARRIVAL_PREFLIGHT.md#29-september-homeworld-sourced-shipment-overlap)
+now excludes them using only public entry reactions. The same genuine game
+completed with 786/786 legal attempts and 21 JSON continuations; this is a
+candidate-legality repair, not support for the combined arrival or a public
+expansion start. The source is not in the last verified live image.
+
 A bounded [Ecaz Ambassador/Moritani Terror same-entry continuation](MORITANI_ENTRY_TIMING.md#selected-bounded-overlap-order--29-september-2026)
 now snapshots both original optional triggers and offers their owners sequential
 choices in current storm order on classic plus Ecaz/Moritani Basic/Advanced

docs/IMPLEMENTATION_STATUS.md

@@ -1,5 +1,26 @@
 # Dune implementation status
 
+## 29 September 2026 — Homeworld-sourced AI arrival preflight
+
+A genuine five-seat Advanced combined Homeworld/Nexus/expansion game on
+`41fd6fe` exposed two rejected Tleilaxu shipments from its own Homeworld
+into unsupported Ambassador/Terror entry combinations. The public AI
+[preflight](BOT_ARRIVAL_PREFLIGHT.md#29-september-homeworld-sourced-shipment-overlap)
+had skipped Homeworld sources. It now quotes their off-planet arrival through
+the same authoritative public reaction helper, without sampling private
+Terror faces or recreating source pricing. A failing-before/passing-after
+real-engine regression exercises all four AI profiles and executable
+fallbacks. The identical genuine game completes after the fix with
+786 accepted attempts, no rejected candidates, 21 JSON continuations and
+a fourth-turn shared victory. Other Homeworld payment-dependent reactions
+and unsupported combined arrivals remain gated; no public start was opened.
+
+The initial full check exposed an existing Guild shipment test that asserted
+payment before a legitimately opened Karama rate response. That test now
+resolves the response before checking the rounded cost. The final
+`npm run check` passes typecheck, lint and 5,757/5,757 offline cases. No HTTP
+contract, database schema or player-facing control changed.
+
 ## 29 September 2026 — Sapho finite-bid boundary and pending source questions
 
 The existing Once Around Juice of Sapho adapter permits an unacted holder to