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FA-85901 / Game economy crafting balance / Open access

Salvage component return: Rare items lose their minimum return · case 01

Worn rare items can return zero of a component.

Verified by executionVariant 1 · 8 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The minimum-one guarantee is applied only to epic items instead of all non-common rarities.

VERIFIED REPAIR

Restore `item['rarity'] != 'common'` at the rarity guarantee scope step.

Unsuccessful approach: Limiting the guarantee to multi-count components still drops single components of rare gear.

Case contract

Return rate: common 50%, rare 70%, epic 90%. Condition d/mx with d clamped to mx; max_durability 0 means indestructible (full condition). Durability <= 0 yields {"scrap": 1}. Each component amount = floor(count*pct*d/(100*mx)) computed once; rare and epic items return at least 1 of each component; zero amounts are omitted.

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.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(item, components):
    pct = {'common': 50, 'rare': 70, 'epic': 90}[item['rarity']]
    mx = item['max_durability']
    if mx == 0:
        d, mx = 1, 1
    else:
        d = min(item['durability'], mx)
    if d <= 0:
        return {'scrap': 1}
    out = {}
    for name, count in components.items():
        amt = count * pct * d // (100 * mx)
        if item['rarity'] == 'epic' and amt < 1:
            amt = 1
        if amt:
            out[name] = amt
    return dict(sorted(out.items()))
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = [[('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 0}, {'cloth': 5, 'ingot': 4, 'shard': 1}],
   {'cloth': 3, 'ingot': 2, 'shard': 1}),
  ('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 50}, {'ingot': 4, 'shard': 3}],
   {'ingot': 1, 'shard': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 50}, {'cloth': 1}],
   {'cloth': 1}),
  ('partial repair boundary #2',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 100}, {'cloth': 6, 'ingot': 1, 'thread': 3}],
   {'cloth': 1, 'ingot': 1, 'thread': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('over-repaired common #1',
   [{'rarity': 'common', 'durability': 30, 'max_durability': 20}, {'ingot': 4, 'cloth': 3}],
   {'cloth': 1, 'ingot': 2}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('control #1',
   [{'rarity': 'common', 'durability': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 20}, {'ingot': 3, 'shard': 3, 'thread': 5}],
   {'ingot': 1, 'shard': 1, 'thread': 1}),
  ('fault site rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 100}, {'cloth': 4}],
   {'cloth': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 100}, {'cloth': 6, 'ingot': 1, 'thread': 3}],
   {'cloth': 1, 'ingot': 1, 'thread': 1}),
  ('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 7, 'max_durability': 7}, {'ingot': 2, 'cloth': 3, 'thread': 1}],
   {'cloth': 2, 'ingot': 1, 'thread': 1}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('control #1',
   [{'rarity': 'common', 'durability': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {}),
  ('control #2', [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 5}], {'scrap': 1})],
 [('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 2, 'max_durability': 7}, {'shard': 2, 'thread': 4, 'cloth': 2}],
   {'cloth': 1, 'shard': 1, 'thread': 1}),
  ('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 7, 'max_durability': 7}, {'ingot': 2, 'cloth': 3, 'thread': 1}],
   {'cloth': 2, 'ingot': 1, 'thread': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 7, 'max_durability': 7}, {'thread': 2, 'ingot': 1, 'cloth': 1}],
   {'cloth': 1, 'ingot': 1, 'thread': 1}),
  ('regression rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 5, 'max_durability': 20}, {'cloth': 2, 'thread': 1}],
   {'cloth': 1, 'thread': 1}),
  ('over-repaired common #1',
   [{'rarity': 'common', 'durability': 30, 'max_durability': 20}, {'ingot': 4, 'cloth': 3}],
   {'cloth': 1, 'ingot': 2}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('control #1', [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 5}], {'scrap': 1}),
  ('control #2',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 100}, {'cloth': 6, 'thread': 1}],
   {'scrap': 1})],
 [('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 5, 'max_durability': 20}, {'cloth': 2, 'thread': 1}],
   {'cloth': 1, 'thread': 1}),
  ('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 5, 'max_durability': 20}, {'cloth': 2, 'ingot': 4}],
   {'cloth': 1, 'ingot': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 31, 'max_durability': 100}, {'thread': 1, 'cloth': 4, 'shard': 6}],
   {'cloth': 1, 'shard': 1, 'thread': 1}),
  ('regression rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 25, 'max_durability': 20}, {'ingot': 5, 'thread': 2, 'shard': 1}],
   {'ingot': 3, 'shard': 1, 'thread': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('over-repaired common #1',
   [{'rarity': 'common', 'durability': 30, 'max_durability': 20}, {'ingot': 4, 'cloth': 3}],
   {'cloth': 1, 'ingot': 2}),
  ('control #1',
   [{'rarity': 'common', 'durability': 1, 'max_durability': 0}, {'shard': 2, 'ingot': 2, 'thread': 6}],
   {'ingot': 1, 'shard': 1, 'thread': 3}),
  ('control #2',
   [{'rarity': 'common', 'durability': 50, 'max_durability': 50}, {'thread': 1, 'ingot': 1}],
   {})],
 [('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 50}, {'cloth': 6}],
   {'cloth': 1}),
  ('fault site rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 7}, {'cloth': 2, 'ingot': 4, 'shard': 6}],
   {'cloth': 1, 'ingot': 1, 'shard': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 20}, {'ingot': 1, 'thread': 1}],
   {'ingot': 1, 'thread': 1}),
  ('partial repair boundary #2',
   [{'rarity': 'epic', 'durability': 3, 'max_durability': 50}, {'thread': 4, 'shard': 2, 'cloth': 1}],
   {'cloth': 1, 'shard': 1, 'thread': 1}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('control #1', [{'rarity': 'epic', 'durability': 12, 'max_durability': 7}, {'ingot': 5}], {'ingot': 4}),
  ('control #2', [{'rarity': 'common', 'durability': 0, 'max_durability': 10}, {'thread': 3}], {'scrap': 1})]]
for label, args, expected in cases[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression rarity guarantee scope #1{'cloth': 3, 'ingot': 2}{'cloth': 3, 'ingot': 2, 'shard': 1}Failed
fault site rarity guarantee scope #1{}{'ingot': 1, 'shard': 1}Failed
partial repair boundary #1{'cloth': 1}{'cloth': 1}Passed
partial repair boundary #2{'cloth': 1, 'ingot': 1, 'thread': 1}{'cloth': 1, 'ingot': 1, 'thread': 1}Passed
indestructible relic #1{'shard': 4}{'shard': 4}Passed
over-repaired common #1{'cloth': 1, 'ingot': 2}{'cloth': 1, 'ingot': 2}Passed
broken rare #1{'scrap': 1}{'scrap': 1}Passed
control #1{}{}Passed

SHA-256 / 8f642626113b4d2ddb7e11fb5b735cd23ea2fd649daeb94fca2926702c56e905

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(item, components):
    pct = {'common': 50, 'rare': 70, 'epic': 90}[item['rarity']]
    mx = item['max_durability']
    if mx == 0:
        d, mx = 1, 1
    else:
        d = min(item['durability'], mx)
    if d <= 0:
        return {'scrap': 1}
    out = {}
    for name, count in components.items():
        amt = count * pct * d // (100 * mx)
        if item['rarity'] != 'common' and count > 1 and amt < 1:
            amt = 1
        if amt:
            out[name] = amt
    return dict(sorted(out.items()))
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = [[('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 0}, {'cloth': 5, 'ingot': 4, 'shard': 1}],
   {'cloth': 3, 'ingot': 2, 'shard': 1}),
  ('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 50}, {'ingot': 4, 'shard': 3}],
   {'ingot': 1, 'shard': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 50}, {'cloth': 1}],
   {'cloth': 1}),
  ('partial repair boundary #2',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 100}, {'cloth': 6, 'ingot': 1, 'thread': 3}],
   {'cloth': 1, 'ingot': 1, 'thread': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('over-repaired common #1',
   [{'rarity': 'common', 'durability': 30, 'max_durability': 20}, {'ingot': 4, 'cloth': 3}],
   {'cloth': 1, 'ingot': 2}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('control #1',
   [{'rarity': 'common', 'durability': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 20}, {'ingot': 3, 'shard': 3, 'thread': 5}],
   {'ingot': 1, 'shard': 1, 'thread': 1}),
  ('fault site rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 100}, {'cloth': 4}],
   {'cloth': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 100}, {'cloth': 6, 'ingot': 1, 'thread': 3}],
   {'cloth': 1, 'ingot': 1, 'thread': 1}),
  ('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 7, 'max_durability': 7}, {'ingot': 2, 'cloth': 3, 'thread': 1}],
   {'cloth': 2, 'ingot': 1, 'thread': 1}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('control #1',
   [{'rarity': 'common', 'durability': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {}),
  ('control #2', [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 5}], {'scrap': 1})],
 [('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 2, 'max_durability': 7}, {'shard': 2, 'thread': 4, 'cloth': 2}],
   {'cloth': 1, 'shard': 1, 'thread': 1}),
  ('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 7, 'max_durability': 7}, {'ingot': 2, 'cloth': 3, 'thread': 1}],
   {'cloth': 2, 'ingot': 1, 'thread': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 7, 'max_durability': 7}, {'thread': 2, 'ingot': 1, 'cloth': 1}],
   {'cloth': 1, 'ingot': 1, 'thread': 1}),
  ('regression rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 5, 'max_durability': 20}, {'cloth': 2, 'thread': 1}],
   {'cloth': 1, 'thread': 1}),
  ('over-repaired common #1',
   [{'rarity': 'common', 'durability': 30, 'max_durability': 20}, {'ingot': 4, 'cloth': 3}],
   {'cloth': 1, 'ingot': 2}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('control #1', [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 5}], {'scrap': 1}),
  ('control #2',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 100}, {'cloth': 6, 'thread': 1}],
   {'scrap': 1})],
 [('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 5, 'max_durability': 20}, {'cloth': 2, 'thread': 1}],
   {'cloth': 1, 'thread': 1}),
  ('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 5, 'max_durability': 20}, {'cloth': 2, 'ingot': 4}],
   {'cloth': 1, 'ingot': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 31, 'max_durability': 100}, {'thread': 1, 'cloth': 4, 'shard': 6}],
   {'cloth': 1, 'shard': 1, 'thread': 1}),
  ('regression rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 25, 'max_durability': 20}, {'ingot': 5, 'thread': 2, 'shard': 1}],
   {'ingot': 3, 'shard': 1, 'thread': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('over-repaired common #1',
   [{'rarity': 'common', 'durability': 30, 'max_durability': 20}, {'ingot': 4, 'cloth': 3}],
   {'cloth': 1, 'ingot': 2}),
  ('control #1',
   [{'rarity': 'common', 'durability': 1, 'max_durability': 0}, {'shard': 2, 'ingot': 2, 'thread': 6}],
   {'ingot': 1, 'shard': 1, 'thread': 3}),
  ('control #2',
   [{'rarity': 'common', 'durability': 50, 'max_durability': 50}, {'thread': 1, 'ingot': 1}],
   {})],
 [('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 50}, {'cloth': 6}],
   {'cloth': 1}),
  ('fault site rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 7}, {'cloth': 2, 'ingot': 4, 'shard': 6}],
   {'cloth': 1, 'ingot': 1, 'shard': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 20}, {'ingot': 1, 'thread': 1}],
   {'ingot': 1, 'thread': 1}),
  ('partial repair boundary #2',
   [{'rarity': 'epic', 'durability': 3, 'max_durability': 50}, {'thread': 4, 'shard': 2, 'cloth': 1}],
   {'cloth': 1, 'shard': 1, 'thread': 1}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('control #1', [{'rarity': 'epic', 'durability': 12, 'max_durability': 7}, {'ingot': 5}], {'ingot': 4}),
  ('control #2', [{'rarity': 'common', 'durability': 0, 'max_durability': 10}, {'thread': 3}], {'scrap': 1})]]
for label, args, expected in cases[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression rarity guarantee scope #1{'cloth': 3, 'ingot': 2}{'cloth': 3, 'ingot': 2, 'shard': 1}Failed
fault site rarity guarantee scope #1{'ingot': 1, 'shard': 1}{'ingot': 1, 'shard': 1}Passed
partial repair boundary #1{}{'cloth': 1}Failed
partial repair boundary #2{'cloth': 1, 'thread': 1}{'cloth': 1, 'ingot': 1, 'thread': 1}Failed
indestructible relic #1{'shard': 4}{'shard': 4}Passed
over-repaired common #1{'cloth': 1, 'ingot': 2}{'cloth': 1, 'ingot': 2}Passed
broken rare #1{'scrap': 1}{'scrap': 1}Passed
control #1{}{}Passed

SHA-256 / aed086031eb93deb9dfb0b39ac1e05b0a77abb7033899190a5f8c2e7187209aa

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(item, components):
    pct = {'common': 50, 'rare': 70, 'epic': 90}[item['rarity']]
    mx = item['max_durability']
    if mx == 0:
        d, mx = 1, 1
    else:
        d = min(item['durability'], mx)
    if d <= 0:
        return {'scrap': 1}
    out = {}
    for name, count in components.items():
        amt = count * pct * d // (100 * mx)
        if item['rarity'] != 'common' and amt < 1:
            amt = 1
        if amt:
            out[name] = amt
    return dict(sorted(out.items()))
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = [[('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 0}, {'cloth': 5, 'ingot': 4, 'shard': 1}],
   {'cloth': 3, 'ingot': 2, 'shard': 1}),
  ('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 50}, {'ingot': 4, 'shard': 3}],
   {'ingot': 1, 'shard': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 50}, {'cloth': 1}],
   {'cloth': 1}),
  ('partial repair boundary #2',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 100}, {'cloth': 6, 'ingot': 1, 'thread': 3}],
   {'cloth': 1, 'ingot': 1, 'thread': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('over-repaired common #1',
   [{'rarity': 'common', 'durability': 30, 'max_durability': 20}, {'ingot': 4, 'cloth': 3}],
   {'cloth': 1, 'ingot': 2}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('control #1',
   [{'rarity': 'common', 'durability': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 20}, {'ingot': 3, 'shard': 3, 'thread': 5}],
   {'ingot': 1, 'shard': 1, 'thread': 1}),
  ('fault site rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 100}, {'cloth': 4}],
   {'cloth': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 100}, {'cloth': 6, 'ingot': 1, 'thread': 3}],
   {'cloth': 1, 'ingot': 1, 'thread': 1}),
  ('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 7, 'max_durability': 7}, {'ingot': 2, 'cloth': 3, 'thread': 1}],
   {'cloth': 2, 'ingot': 1, 'thread': 1}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('control #1',
   [{'rarity': 'common', 'durability': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {}),
  ('control #2', [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 5}], {'scrap': 1})],
 [('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 2, 'max_durability': 7}, {'shard': 2, 'thread': 4, 'cloth': 2}],
   {'cloth': 1, 'shard': 1, 'thread': 1}),
  ('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 7, 'max_durability': 7}, {'ingot': 2, 'cloth': 3, 'thread': 1}],
   {'cloth': 2, 'ingot': 1, 'thread': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 7, 'max_durability': 7}, {'thread': 2, 'ingot': 1, 'cloth': 1}],
   {'cloth': 1, 'ingot': 1, 'thread': 1}),
  ('regression rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 5, 'max_durability': 20}, {'cloth': 2, 'thread': 1}],
   {'cloth': 1, 'thread': 1}),
  ('over-repaired common #1',
   [{'rarity': 'common', 'durability': 30, 'max_durability': 20}, {'ingot': 4, 'cloth': 3}],
   {'cloth': 1, 'ingot': 2}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('control #1', [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 5}], {'scrap': 1}),
  ('control #2',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 100}, {'cloth': 6, 'thread': 1}],
   {'scrap': 1})],
 [('regression rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 5, 'max_durability': 20}, {'cloth': 2, 'thread': 1}],
   {'cloth': 1, 'thread': 1}),
  ('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 5, 'max_durability': 20}, {'cloth': 2, 'ingot': 4}],
   {'cloth': 1, 'ingot': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 31, 'max_durability': 100}, {'thread': 1, 'cloth': 4, 'shard': 6}],
   {'cloth': 1, 'shard': 1, 'thread': 1}),
  ('regression rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 25, 'max_durability': 20}, {'ingot': 5, 'thread': 2, 'shard': 1}],
   {'ingot': 3, 'shard': 1, 'thread': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('over-repaired common #1',
   [{'rarity': 'common', 'durability': 30, 'max_durability': 20}, {'ingot': 4, 'cloth': 3}],
   {'cloth': 1, 'ingot': 2}),
  ('control #1',
   [{'rarity': 'common', 'durability': 1, 'max_durability': 0}, {'shard': 2, 'ingot': 2, 'thread': 6}],
   {'ingot': 1, 'shard': 1, 'thread': 3}),
  ('control #2',
   [{'rarity': 'common', 'durability': 50, 'max_durability': 50}, {'thread': 1, 'ingot': 1}],
   {})],
 [('fault site rarity guarantee scope #1',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 50}, {'cloth': 6}],
   {'cloth': 1}),
  ('fault site rarity guarantee scope #2',
   [{'rarity': 'rare', 'durability': 1, 'max_durability': 7}, {'cloth': 2, 'ingot': 4, 'shard': 6}],
   {'cloth': 1, 'ingot': 1, 'shard': 1}),
  ('partial repair boundary #1',
   [{'rarity': 'epic', 'durability': 1, 'max_durability': 20}, {'ingot': 1, 'thread': 1}],
   {'ingot': 1, 'thread': 1}),
  ('partial repair boundary #2',
   [{'rarity': 'epic', 'durability': 3, 'max_durability': 50}, {'thread': 4, 'shard': 2, 'cloth': 1}],
   {'cloth': 1, 'shard': 1, 'thread': 1}),
  ('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('indestructible relic #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 0}, {'shard': 5}],
   {'shard': 4}),
  ('control #1', [{'rarity': 'epic', 'durability': 12, 'max_durability': 7}, {'ingot': 5}], {'ingot': 4}),
  ('control #2', [{'rarity': 'common', 'durability': 0, 'max_durability': 10}, {'thread': 3}], {'scrap': 1})]]
for label, args, expected in cases[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression rarity guarantee scope #1{'cloth': 3, 'ingot': 2, 'shard': 1}{'cloth': 3, 'ingot': 2, 'shard': 1}Passed
fault site rarity guarantee scope #1{'ingot': 1, 'shard': 1}{'ingot': 1, 'shard': 1}Passed
partial repair boundary #1{'cloth': 1}{'cloth': 1}Passed
partial repair boundary #2{'cloth': 1, 'ingot': 1, 'thread': 1}{'cloth': 1, 'ingot': 1, 'thread': 1}Passed
indestructible relic #1{'shard': 4}{'shard': 4}Passed
over-repaired common #1{'cloth': 1, 'ingot': 2}{'cloth': 1, 'ingot': 2}Passed
broken rare #1{'scrap': 1}{'scrap': 1}Passed
control #1{}{}Passed

SHA-256 / e69edd8103e4ea614fc4d776fee4d603c503e014e5a96ac3d1248262ae55e78e

Verification & scope

Deterministic toy contract stipulated for this model; integer or exact arithmetic only, not a reproduction of any specific game engine. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:50:44.732447+00:00.

Case digest / dd8711c3f86d7192733a515aca2f793d45474cc447780f5cc95165360daa1861