FA-96041 / Postal address normalization / Open access
House number parser: the fraction is duplicated in the street remainder · case 01
A fraction is reported and also left at the start of the street.
ROOT CAUSE
The consumed-token index stays at 1 after a fraction is recognized.
VERIFIED REPAIR
Advance past both the number token and the fraction token.
Unsuccessful approach: Advancing by three tokens also swallows the first street word.
Case contract
Uppercase and split the line. The first token must start with digits: the digits form the house number (an int, which must not be 0); an optional single hyphen is dropped and at most one letter may follow as the suffix. If the second token is a/b with b in 2,3,4 and 0 < a < b it is the fraction and is consumed. Return [number, suffix, fraction, rest] or None.
Why this case matters
House-number parsing decides the delivery point; fractions and suffixes distinguish separate dwellings on one lot.
1 / The failure
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(x):
t = x.upper().split()
if not t:
return None
head = t[0]
i = 0
while i < len(head) and head[i].isdigit():
i += 1
if i == 0:
return None
number, tail = int(head[:i]), head[i:]
if number == 0:
return None
if tail.startswith('-'):
tail = tail[1:]
if len(tail) > 1 or (tail and not tail.isalpha()):
return None
frac, k = '', 1
if len(t) > 1 and t[1].count('/') == 1:
a, b = t[1].split('/')
if a.isdigit() and b.isdigit() and b in ('2', '3', '4') and 0 < int(a) < int(b):
frac, k = t[1], 1
return [number, tail, frac, ' '.join(t[k:])]
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['plain number', '13 FAKE ST', [13, '', '', 'FAKE ST']], ['letter suffix', '13b Fake St', [13, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '13-B FAKE ST', [13, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '13--B FAKE ST', None], ['two-letter suffix rejected', '13AB FAKE ST', None], ['half fraction consumed', '13 1/2 FAKE ST', [13, '', '1/2', 'FAKE ST']], ['third fraction consumed', '13 1/3 FAKE ST', [13, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '13 5/8 FAKE ST', [13, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '13 2/2 FAKE ST', [13, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '13 0/4 FAKE ST', [13, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '23 FAKE ST', [23, '', '', 'FAKE ST']], ['letter suffix', '23b Fake St', [23, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '23-B FAKE ST', [23, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '23--B FAKE ST', None], ['two-letter suffix rejected', '23AB FAKE ST', None], ['half fraction consumed', '23 1/2 FAKE ST', [23, '', '1/2', 'FAKE ST']], ['third fraction consumed', '23 1/3 FAKE ST', [23, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '23 5/8 FAKE ST', [23, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '23 2/2 FAKE ST', [23, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '23 0/4 FAKE ST', [23, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '33 FAKE ST', [33, '', '', 'FAKE ST']], ['letter suffix', '33b Fake St', [33, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '33-B FAKE ST', [33, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '33--B FAKE ST', None], ['two-letter suffix rejected', '33AB FAKE ST', None], ['half fraction consumed', '33 1/2 FAKE ST', [33, '', '1/2', 'FAKE ST']], ['third fraction consumed', '33 1/3 FAKE ST', [33, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '33 5/8 FAKE ST', [33, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '33 2/2 FAKE ST', [33, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '33 0/4 FAKE ST', [33, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '43 FAKE ST', [43, '', '', 'FAKE ST']], ['letter suffix', '43b Fake St', [43, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '43-B FAKE ST', [43, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '43--B FAKE ST', None], ['two-letter suffix rejected', '43AB FAKE ST', None], ['half fraction consumed', '43 1/2 FAKE ST', [43, '', '1/2', 'FAKE ST']], ['third fraction consumed', '43 1/3 FAKE ST', [43, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '43 5/8 FAKE ST', [43, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '43 2/2 FAKE ST', [43, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '43 0/4 FAKE ST', [43, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '53 FAKE ST', [53, '', '', 'FAKE ST']], ['letter suffix', '53b Fake St', [53, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '53-B FAKE ST', [53, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '53--B FAKE ST', None], ['two-letter suffix rejected', '53AB FAKE ST', None], ['half fraction consumed', '53 1/2 FAKE ST', [53, '', '1/2', 'FAKE ST']], ['third fraction consumed', '53 1/3 FAKE ST', [53, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '53 5/8 FAKE ST', [53, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '53 2/2 FAKE ST', [53, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '53 0/4 FAKE ST', [53, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]]]
for label, arg, expected in fixtures[N - 1]:
check(label, solve(arg), 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 fixture | Actual | Expected | Outcome |
|---|---|---|---|
| plain number | [13, '', '', 'FAKE ST'] | [13, '', '', 'FAKE ST'] | Passed |
| letter suffix | [13, 'B', '', 'FAKE ST'] | [13, 'B', '', 'FAKE ST'] | Passed |
| hyphenated letter suffix | [13, 'B', '', 'FAKE ST'] | [13, 'B', '', 'FAKE ST'] | Passed |
| doubled hyphen is malformed | None | None | Passed |
| two-letter suffix rejected | None | None | Passed |
| half fraction consumed | [13, '', '1/2', '1/2 FAKE ST'] | [13, '', '1/2', 'FAKE ST'] | Failed |
| third fraction consumed | [13, '', '1/3', '1/3 FAKE ST'] | [13, '', '1/3', 'FAKE ST'] | Failed |
| eighths are not house fractions | [13, '', '', '5/8 FAKE ST'] | [13, '', '', '5/8 FAKE ST'] | Passed |
| improper fraction stays in the street | [13, '', '', '2/2 FAKE ST'] | [13, '', '', '2/2 FAKE ST'] | Passed |
| zero numerator stays in the street | [13, '', '', '0/4 FAKE ST'] | [13, '', '', '0/4 FAKE ST'] | Passed |
| house number zero rejected | None | None | Passed |
| padded zero rejected | None | None | Passed |
SHA-256 / e0b79599eaf56fbe63ab8efc0fbf249ca6eb0f79f42966902e758719a9a0f357
2 / The unsuccessful fix
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(x):
t = x.upper().split()
if not t:
return None
head = t[0]
i = 0
while i < len(head) and head[i].isdigit():
i += 1
if i == 0:
return None
number, tail = int(head[:i]), head[i:]
if number == 0:
return None
if tail.startswith('-'):
tail = tail[1:]
if len(tail) > 1 or (tail and not tail.isalpha()):
return None
frac, k = '', 1
if len(t) > 1 and t[1].count('/') == 1:
a, b = t[1].split('/')
if a.isdigit() and b.isdigit() and b in ('2', '3', '4') and 0 < int(a) < int(b):
frac, k = t[1], 3
return [number, tail, frac, ' '.join(t[k:])]
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['plain number', '13 FAKE ST', [13, '', '', 'FAKE ST']], ['letter suffix', '13b Fake St', [13, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '13-B FAKE ST', [13, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '13--B FAKE ST', None], ['two-letter suffix rejected', '13AB FAKE ST', None], ['half fraction consumed', '13 1/2 FAKE ST', [13, '', '1/2', 'FAKE ST']], ['third fraction consumed', '13 1/3 FAKE ST', [13, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '13 5/8 FAKE ST', [13, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '13 2/2 FAKE ST', [13, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '13 0/4 FAKE ST', [13, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '23 FAKE ST', [23, '', '', 'FAKE ST']], ['letter suffix', '23b Fake St', [23, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '23-B FAKE ST', [23, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '23--B FAKE ST', None], ['two-letter suffix rejected', '23AB FAKE ST', None], ['half fraction consumed', '23 1/2 FAKE ST', [23, '', '1/2', 'FAKE ST']], ['third fraction consumed', '23 1/3 FAKE ST', [23, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '23 5/8 FAKE ST', [23, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '23 2/2 FAKE ST', [23, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '23 0/4 FAKE ST', [23, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '33 FAKE ST', [33, '', '', 'FAKE ST']], ['letter suffix', '33b Fake St', [33, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '33-B FAKE ST', [33, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '33--B FAKE ST', None], ['two-letter suffix rejected', '33AB FAKE ST', None], ['half fraction consumed', '33 1/2 FAKE ST', [33, '', '1/2', 'FAKE ST']], ['third fraction consumed', '33 1/3 FAKE ST', [33, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '33 5/8 FAKE ST', [33, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '33 2/2 FAKE ST', [33, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '33 0/4 FAKE ST', [33, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '43 FAKE ST', [43, '', '', 'FAKE ST']], ['letter suffix', '43b Fake St', [43, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '43-B FAKE ST', [43, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '43--B FAKE ST', None], ['two-letter suffix rejected', '43AB FAKE ST', None], ['half fraction consumed', '43 1/2 FAKE ST', [43, '', '1/2', 'FAKE ST']], ['third fraction consumed', '43 1/3 FAKE ST', [43, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '43 5/8 FAKE ST', [43, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '43 2/2 FAKE ST', [43, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '43 0/4 FAKE ST', [43, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '53 FAKE ST', [53, '', '', 'FAKE ST']], ['letter suffix', '53b Fake St', [53, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '53-B FAKE ST', [53, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '53--B FAKE ST', None], ['two-letter suffix rejected', '53AB FAKE ST', None], ['half fraction consumed', '53 1/2 FAKE ST', [53, '', '1/2', 'FAKE ST']], ['third fraction consumed', '53 1/3 FAKE ST', [53, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '53 5/8 FAKE ST', [53, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '53 2/2 FAKE ST', [53, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '53 0/4 FAKE ST', [53, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]]]
for label, arg, expected in fixtures[N - 1]:
check(label, solve(arg), 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 fixture | Actual | Expected | Outcome |
|---|---|---|---|
| plain number | [13, '', '', 'FAKE ST'] | [13, '', '', 'FAKE ST'] | Passed |
| letter suffix | [13, 'B', '', 'FAKE ST'] | [13, 'B', '', 'FAKE ST'] | Passed |
| hyphenated letter suffix | [13, 'B', '', 'FAKE ST'] | [13, 'B', '', 'FAKE ST'] | Passed |
| doubled hyphen is malformed | None | None | Passed |
| two-letter suffix rejected | None | None | Passed |
| half fraction consumed | [13, '', '1/2', 'ST'] | [13, '', '1/2', 'FAKE ST'] | Failed |
| third fraction consumed | [13, '', '1/3', 'ST'] | [13, '', '1/3', 'FAKE ST'] | Failed |
| eighths are not house fractions | [13, '', '', '5/8 FAKE ST'] | [13, '', '', '5/8 FAKE ST'] | Passed |
| improper fraction stays in the street | [13, '', '', '2/2 FAKE ST'] | [13, '', '', '2/2 FAKE ST'] | Passed |
| zero numerator stays in the street | [13, '', '', '0/4 FAKE ST'] | [13, '', '', '0/4 FAKE ST'] | Passed |
| house number zero rejected | None | None | Passed |
| padded zero rejected | None | None | Passed |
SHA-256 / a6e5835f6f6f6b07758aebb11275543409fa90c2d7234abf903770ed25cdf512
3 / The verified repair
Exit 0"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(x):
t = x.upper().split()
if not t:
return None
head = t[0]
i = 0
while i < len(head) and head[i].isdigit():
i += 1
if i == 0:
return None
number, tail = int(head[:i]), head[i:]
if number == 0:
return None
if tail.startswith('-'):
tail = tail[1:]
if len(tail) > 1 or (tail and not tail.isalpha()):
return None
frac, k = '', 1
if len(t) > 1 and t[1].count('/') == 1:
a, b = t[1].split('/')
if a.isdigit() and b.isdigit() and b in ('2', '3', '4') and 0 < int(a) < int(b):
frac, k = t[1], 2
return [number, tail, frac, ' '.join(t[k:])]
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['plain number', '13 FAKE ST', [13, '', '', 'FAKE ST']], ['letter suffix', '13b Fake St', [13, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '13-B FAKE ST', [13, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '13--B FAKE ST', None], ['two-letter suffix rejected', '13AB FAKE ST', None], ['half fraction consumed', '13 1/2 FAKE ST', [13, '', '1/2', 'FAKE ST']], ['third fraction consumed', '13 1/3 FAKE ST', [13, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '13 5/8 FAKE ST', [13, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '13 2/2 FAKE ST', [13, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '13 0/4 FAKE ST', [13, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '23 FAKE ST', [23, '', '', 'FAKE ST']], ['letter suffix', '23b Fake St', [23, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '23-B FAKE ST', [23, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '23--B FAKE ST', None], ['two-letter suffix rejected', '23AB FAKE ST', None], ['half fraction consumed', '23 1/2 FAKE ST', [23, '', '1/2', 'FAKE ST']], ['third fraction consumed', '23 1/3 FAKE ST', [23, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '23 5/8 FAKE ST', [23, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '23 2/2 FAKE ST', [23, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '23 0/4 FAKE ST', [23, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '33 FAKE ST', [33, '', '', 'FAKE ST']], ['letter suffix', '33b Fake St', [33, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '33-B FAKE ST', [33, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '33--B FAKE ST', None], ['two-letter suffix rejected', '33AB FAKE ST', None], ['half fraction consumed', '33 1/2 FAKE ST', [33, '', '1/2', 'FAKE ST']], ['third fraction consumed', '33 1/3 FAKE ST', [33, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '33 5/8 FAKE ST', [33, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '33 2/2 FAKE ST', [33, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '33 0/4 FAKE ST', [33, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '43 FAKE ST', [43, '', '', 'FAKE ST']], ['letter suffix', '43b Fake St', [43, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '43-B FAKE ST', [43, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '43--B FAKE ST', None], ['two-letter suffix rejected', '43AB FAKE ST', None], ['half fraction consumed', '43 1/2 FAKE ST', [43, '', '1/2', 'FAKE ST']], ['third fraction consumed', '43 1/3 FAKE ST', [43, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '43 5/8 FAKE ST', [43, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '43 2/2 FAKE ST', [43, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '43 0/4 FAKE ST', [43, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]], [['plain number', '53 FAKE ST', [53, '', '', 'FAKE ST']], ['letter suffix', '53b Fake St', [53, 'B', '', 'FAKE ST']], ['hyphenated letter suffix', '53-B FAKE ST', [53, 'B', '', 'FAKE ST']], ['doubled hyphen is malformed', '53--B FAKE ST', None], ['two-letter suffix rejected', '53AB FAKE ST', None], ['half fraction consumed', '53 1/2 FAKE ST', [53, '', '1/2', 'FAKE ST']], ['third fraction consumed', '53 1/3 FAKE ST', [53, '', '1/3', 'FAKE ST']], ['eighths are not house fractions', '53 5/8 FAKE ST', [53, '', '', '5/8 FAKE ST']], ['improper fraction stays in the street', '53 2/2 FAKE ST', [53, '', '', '2/2 FAKE ST']], ['zero numerator stays in the street', '53 0/4 FAKE ST', [53, '', '', '0/4 FAKE ST']], ['house number zero rejected', '0 FAKE ST', None], ['padded zero rejected', '00 FAKE ST', None]]]
for label, arg, expected in fixtures[N - 1]:
check(label, solve(arg), 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 fixture | Actual | Expected | Outcome |
|---|---|---|---|
| plain number | [13, '', '', 'FAKE ST'] | [13, '', '', 'FAKE ST'] | Passed |
| letter suffix | [13, 'B', '', 'FAKE ST'] | [13, 'B', '', 'FAKE ST'] | Passed |
| hyphenated letter suffix | [13, 'B', '', 'FAKE ST'] | [13, 'B', '', 'FAKE ST'] | Passed |
| doubled hyphen is malformed | None | None | Passed |
| two-letter suffix rejected | None | None | Passed |
| half fraction consumed | [13, '', '1/2', 'FAKE ST'] | [13, '', '1/2', 'FAKE ST'] | Passed |
| third fraction consumed | [13, '', '1/3', 'FAKE ST'] | [13, '', '1/3', 'FAKE ST'] | Passed |
| eighths are not house fractions | [13, '', '', '5/8 FAKE ST'] | [13, '', '', '5/8 FAKE ST'] | Passed |
| improper fraction stays in the street | [13, '', '', '2/2 FAKE ST'] | [13, '', '', '2/2 FAKE ST'] | Passed |
| zero numerator stays in the street | [13, '', '', '0/4 FAKE ST'] | [13, '', '', '0/4 FAKE ST'] | Passed |
| house number zero rejected | None | None | Passed |
| padded zero rejected | None | None | Passed |
SHA-256 / eaed61f9a53eeba73422981afcd5e065a0cdb1b01ff4621bb02f09bd98753c2c
Verification & scope
A deterministic toy contract over synthetic, obviously fictitious addresses. The rules are stipulated for this model only and make no claim of conformance with any postal authority standard. 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 2026-09-29T14:52:19.243052+00:00.
Case digest / 0155771bbcd8db8a0049ee387fb0238732337cb99493ff8f236f5954abdb3f3d