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Samuel LisonandClaude Opus 4.8
177a4118fe
A new server-authoritative, dupe-proof trade system. Walk up to another player, trigger the "Trade" prompt; they Accept/Decline; both stage loose backpack stacks (drag from the inventory grid, with −/+ qty steppers) and must Confirm before anything moves. Anti-dupe by construction: staging is by-reference (items never leave the owner until commit), and the commit is one synchronous, no-yield critical section — re-validate holds → pre-flight both receivers have room (new Inventory.canAccept) → remove both → grant with addUpTo → refund any residue. Item count is conserved on every branch (verified: 200k-iteration conservation + fit-oracle fuzz). Auto-cancels on death / leave / out-of-range (MaxDistance) / request timeout; a staging change resets both confirms. New Trade server system + TradeUi client window, the "Trading" Config section (tunable in SurvivorCore Studio), hooks trade:started / trade:completed, and a trades_total progression counter. v1 is backpack stacks only (worn gear reserved behind AllowEquippedItems). - src/systems/Trade.luau, src/client/TradeUi.luau, src/shared/TradingConfig.luau (new) - src/systems/Inventory.luau: exported canAccept (weight+slot fit oracle) - src/shared/EngineConfig.luau: Trading section; src/init.luau boot wiring - docs/trading.md, README, CHANGELOG (Unreleased), Hooks catalogue, extending.md - demo/server/TradeTestStation.server.luau: /tradetest 2-player conservation harness Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>