75 lines
4.1 KiB
Markdown
75 lines
4.1 KiB
Markdown
# AI arrival checks
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14 September 2026. This removes repeated AI candidates rejected by the existing
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arrival guard. It does not choose an order for simultaneous reactions or lift
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an unfinished expansion gate.
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## Reproduction
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The genuine combined-expansion samples with base seed `20260914` completed on
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`368a7a5`, but Basic proposed forty and Advanced four unsupported Ambassador
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arrivals before choosing legal alternatives. The default six expansion samples
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also retained eighty-two rejected Ambassador/Terror arrival candidates. The
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[deferred movement](DEFERRED_MOVEMENT_ARRIVAL.md) and
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[shipment](DEFERRED_SHIPMENT_ARRIVAL.md) contracts explain the existing guard.
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## Connected behavior
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After constructing its candidate actions and native source/payment choices,
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each AI profile uses `botArrivalBlock` to exclude known ordinary ship/move
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arrival conflicts. The adapter calls the same `quoteCompletedMovementArrival`
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used by authoritative preflight. It does not copy the Ambassador/Terror branches
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or infer a new rule from token co-location.
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The quote preserves same-territory movement, single reactions, own-faction and
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allied exemptions, matching Ambassador immunity and Bene Gesserit stance.
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Shipment additionally includes the prospective Guild income and Spiritual
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Advisor opportunities. It uses the actual ordinary tariff and selected or
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minimum necessary allied contribution. A Guild-funded payment that creates no
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Guild income is kept. An owned No-Field is priced as one component without
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reading its concealed value. Advanced Fremen storm arrival keeps its existing
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response condition.
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Only public board/faction/stance/reserve information and the acting seat's own
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funds enter the adapter. Concealed Terror faces and rival hands, spice, Traitors
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and Face Dancers are unnecessary. It does not mutate the view or sample
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randomness. Only the known typed arrival error excludes a candidate; unexpected
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faults propagate. The engine remains authoritative for every actual action.
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Homeworld-sourced ordinary shipments now quote the same public arrival triggers,
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including a colocated Ambassador and Terror, after the bot selects its own
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physical source. Their off-planet origin is sufficient for the arrival quote;
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Homeworld source eligibility, tariffs and any payment-dependent Guild response
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remain authoritative engine checks, not duplicated AI rules. Other Homeworld
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routes, explicit Nexus shipments, special movement and unrecognized actions
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retain their own adapters and legal fallback search. This is not a complete
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action validator or certification that every AI candidate is legal.
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## Evidence
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Focused real-engine cases exercise the original rejected entries and executable
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alternatives across all four profiles, supported single reactions and matching
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faction immunity, Guild-funded shipments, No-Fields, BG accompaniment versus
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fighter intrusion, JSON continuation and private-field access traps. The BG
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advisor fixture retains another faction in its territory so normal automatic
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stance settlement does not turn a lone advisor group into fighters.
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Final checks and same-seed integrated results are recorded with the source-bound
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private checkpoint and Git message. Existing saved games remain protected; no
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server restart or database change is required.
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## 29 September: Homeworld-sourced shipment overlap
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A genuine five-seat Advanced combined Homeworld/Nexus/expansion game on
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`41fd6fe` completed in 786 actions but proposed two Tleilaxu shipments from
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its own Homeworld into unsupported Ambassador/Terror arrival combinations.
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Both were rejected without writes before a legal alternative was chosen. The
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owner-view preflight formerly skipped every Homeworld shipment. It now passes
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off-planet Homeworld-source arrivals through the same public quote without
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assuming a price or hidden Terror face. All four AI profiles exclude the
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reproduced action while retaining an executable alternative. A same-seed
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genuine-setup replay completes in 786 accepted attempts, zero rejections,
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21 JSON continuations and the same fourth-turn shared victory. This repairs
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candidate legality, not the unsupported arrival-rule composition or public
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expansion start gate.
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