FAILURE MAP
← Case archive

FA-85896 / Game economy crafting balance / Open access

Salvage component return: Broken items return components · case 01

A zero-durability rare item returns guaranteed components instead of scrap.

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

ROOT CAUSE

The broken check is strict, so durability exactly zero proceeds into the component loop.

VERIFIED REPAIR

Restore `if d <= 0:` at the broken item gate step.

Unsuccessful approach: Restricting the scrap rule to common items lets broken rare and epic gear keep its guarantee.

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'] != '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 = [[('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 5}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 100}, {'cloth': 6, 'thread': 1}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'cloth': 6}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'ingot': 5, 'thread': 3}],
   {'scrap': 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': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 100}, {'cloth': 6, 'thread': 1}],
   {'scrap': 1}),
  ('fault site broken item gate #2',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 10}, {'thread': 3}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'cloth': 6}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'ingot': 5, 'thread': 3}],
   {'scrap': 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': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'cloth': 6}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'ingot': 5, 'thread': 3}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 7}, {'cloth': 5, 'shard': 5, 'ingot': 1}],
   {'scrap': 1}),
  ('regression broken item gate #4',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 20}, {'cloth': 6, 'thread': 2, 'shard': 3}],
   {'scrap': 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': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 7}, {'thread': 4, 'cloth': 5}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 7}, {'cloth': 5, 'shard': 5, 'ingot': 1}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 2, 'ingot': 4, 'thread': 1}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'ingot': 2, 'shard': 5, 'cloth': 5}],
   {'scrap': 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': 'rare', 'durability': 1, 'max_durability': 0}, {'cloth': 5, 'ingot': 4, 'shard': 1}],
   {'cloth': 3, 'ingot': 2, 'shard': 1})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 7}, {'cloth': 6, 'ingot': 4, 'shard': 2}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 20}, {'cloth': 6, 'thread': 2, 'shard': 3}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 7}, {'shard': 1, 'thread': 2, 'ingot': 2}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 7}, {'ingot': 6}],
   {'scrap': 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})]]
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
broken rare #1{'thread': 1}{'scrap': 1}Failed
regression broken item gate #1{'shard': 1}{'scrap': 1}Failed
fault site broken item gate #1{}{'scrap': 1}Failed
regression broken item gate #2{'cloth': 1}{'scrap': 1}Failed
regression broken item gate #3{'ingot': 1, 'thread': 1}{'scrap': 1}Failed
indestructible relic #1{'shard': 4}{'shard': 4}Passed
over-repaired common #1{'cloth': 1, 'ingot': 2}{'cloth': 1, 'ingot': 2}Passed
control #1{}{}Passed

SHA-256 / 21ff6ccba3b99269083c0266c44302b242d17baed09906e5fa671657942659d0

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 and item['rarity'] == 'common':
        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 = [[('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 5}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 100}, {'cloth': 6, 'thread': 1}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'cloth': 6}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'ingot': 5, 'thread': 3}],
   {'scrap': 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': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 100}, {'cloth': 6, 'thread': 1}],
   {'scrap': 1}),
  ('fault site broken item gate #2',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 10}, {'thread': 3}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'cloth': 6}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'ingot': 5, 'thread': 3}],
   {'scrap': 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': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'cloth': 6}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'ingot': 5, 'thread': 3}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 7}, {'cloth': 5, 'shard': 5, 'ingot': 1}],
   {'scrap': 1}),
  ('regression broken item gate #4',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 20}, {'cloth': 6, 'thread': 2, 'shard': 3}],
   {'scrap': 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': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 7}, {'thread': 4, 'cloth': 5}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 7}, {'cloth': 5, 'shard': 5, 'ingot': 1}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 2, 'ingot': 4, 'thread': 1}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'ingot': 2, 'shard': 5, 'cloth': 5}],
   {'scrap': 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': 'rare', 'durability': 1, 'max_durability': 0}, {'cloth': 5, 'ingot': 4, 'shard': 1}],
   {'cloth': 3, 'ingot': 2, 'shard': 1})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 7}, {'cloth': 6, 'ingot': 4, 'shard': 2}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 20}, {'cloth': 6, 'thread': 2, 'shard': 3}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 7}, {'shard': 1, 'thread': 2, 'ingot': 2}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 7}, {'ingot': 6}],
   {'scrap': 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})]]
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
broken rare #1{'thread': 1}{'scrap': 1}Failed
regression broken item gate #1{'shard': 1}{'scrap': 1}Failed
fault site broken item gate #1{'scrap': 1}{'scrap': 1}Passed
regression broken item gate #2{'cloth': 1}{'scrap': 1}Failed
regression broken item gate #3{'ingot': 1, 'thread': 1}{'scrap': 1}Failed
indestructible relic #1{'shard': 4}{'shard': 4}Passed
over-repaired common #1{'cloth': 1, 'ingot': 2}{'cloth': 1, 'ingot': 2}Passed
control #1{}{}Passed

SHA-256 / d3800bc5c5d1f516941a3b1a7056592776e5ade267bde27a4973d253636d94d5

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 = [[('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 5}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 100}, {'cloth': 6, 'thread': 1}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'cloth': 6}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'ingot': 5, 'thread': 3}],
   {'scrap': 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': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 100}, {'cloth': 6, 'thread': 1}],
   {'scrap': 1}),
  ('fault site broken item gate #2',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 10}, {'thread': 3}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'cloth': 6}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'ingot': 5, 'thread': 3}],
   {'scrap': 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': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'cloth': 6}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 10}, {'ingot': 5, 'thread': 3}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 7}, {'cloth': 5, 'shard': 5, 'ingot': 1}],
   {'scrap': 1}),
  ('regression broken item gate #4',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 20}, {'cloth': 6, 'thread': 2, 'shard': 3}],
   {'scrap': 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': 3, 'max_durability': 10}, {'thread': 4, 'cloth': 5}],
   {})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 7}, {'thread': 4, 'cloth': 5}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 7}, {'cloth': 5, 'shard': 5, 'ingot': 1}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'shard': 2, 'ingot': 4, 'thread': 1}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 100}, {'ingot': 2, 'shard': 5, 'cloth': 5}],
   {'scrap': 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': 'rare', 'durability': 1, 'max_durability': 0}, {'cloth': 5, 'ingot': 4, 'shard': 1}],
   {'cloth': 3, 'ingot': 2, 'shard': 1})],
 [('broken rare #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 40}, {'thread': 2}],
   {'scrap': 1}),
  ('fault site broken item gate #1',
   [{'rarity': 'common', 'durability': 0, 'max_durability': 7}, {'cloth': 6, 'ingot': 4, 'shard': 2}],
   {'scrap': 1}),
  ('regression broken item gate #1',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 20}, {'cloth': 6, 'thread': 2, 'shard': 3}],
   {'scrap': 1}),
  ('regression broken item gate #2',
   [{'rarity': 'rare', 'durability': 0, 'max_durability': 7}, {'shard': 1, 'thread': 2, 'ingot': 2}],
   {'scrap': 1}),
  ('regression broken item gate #3',
   [{'rarity': 'epic', 'durability': 0, 'max_durability': 7}, {'ingot': 6}],
   {'scrap': 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})]]
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
broken rare #1{'scrap': 1}{'scrap': 1}Passed
regression broken item gate #1{'scrap': 1}{'scrap': 1}Passed
fault site broken item gate #1{'scrap': 1}{'scrap': 1}Passed
regression broken item gate #2{'scrap': 1}{'scrap': 1}Passed
regression broken item gate #3{'scrap': 1}{'scrap': 1}Passed
indestructible relic #1{'shard': 4}{'shard': 4}Passed
over-repaired common #1{'cloth': 1, 'ingot': 2}{'cloth': 1, 'ingot': 2}Passed
control #1{}{}Passed

SHA-256 / 82c9536a83b3b4fb83ddcc7ee6b2648b98cad38d9e2cbefd4ce88e804f9758fa

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 2026-09-29T14:50:44.521753+00:00.

Case digest / bc3ec2bdf2c7332b00d6aa720e5f2ab1dc76d68cae97713de2e999d86e6e61bc