FA-86243 / Game economy crafting balance / Member archive

Profession skill-up colors: Yellow threshold stays orange · case 03

Crafting at the yellow threshold still guarantees a skill-up.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

recipe_levels = [learn, yellow, green, gray]. Skill below learn cannot craft (error "too low"). Per roll (0..99), while skill < 300: chance 100 below yellow (orange), 75 below green, 25 below gray, else 0; the skill goes up when roll < chance and the color is re-evaluated each craft.

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
fault site orange boundary #1	`{"skill": 270, "ups": 5}`	`{"skill": 269, "ups": 4}`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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