FA-86262 / Game economy crafting balance / Member archive

Daily market rebalance: Price drops round against the seller · case 02

Prices fall one coin more than the floor rule.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

If target <= 0 the price is only clamped to [floor, ceiling]. If sold > target: pct = min(20, floor((sold-target)*100/target)), step = floor(price*pct/100) but at least 1 when pct > 0, new = price + step. If sold < target: pct = min(15, floor((target-sold)*100/target)), new = price - floor(price*pct/100). Otherwise unchanged. Result clamped to [floor, ceiling].

Why this case matters

Game economies leak or destroy currency when one crafting or pricing rule is off by one boundary, rounding stage or state update; the defect is observable in exact integer outcomes.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression decrease rounding #1	`84`	`85`	Failed

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