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FA-25081 / Filter interfaces / Open access

Pending status requires a sent revision newer than acknowledgment · case 01

Pending status requires a sent revision newer than acknowledgment is violated by the widget projection.

Verified by executionVariant 1 · 10 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The revision-pending decision uses `d['sent']!=d['ack']` instead of the stipulated applied-status projection.

THE FAILURE

The revision-pending decision uses `d['sent']!=d['ack']` instead of the stipulated applied-status projection.

Unsuccessful approach: The attempted correction `d['sent']>=d['ack']` still violates the explicit contract fixtures.

Case contract

The applied-filter summary distinguishes settled, pending and failed draft updates, and uses the server-acknowledged filter revision for result badges. This example checks: Pending status requires a sent revision newer than acknowledgment.

Why this case matters

Filter-widget state and serialization must preserve user constraints while the view changes.

1 / The failure

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

N = 1
observations = []
def solve(d):
    return {'revision-pending':(d['sent']!=d['ack']), 'result-fresh':(d['result']==d['ack']), 'error-scope':(d['error_revision']==d['sent']), 'dirty-count':(len(set(d['draft']) ^ set(d['applied']))), 'result-label':('updating' if d['sent']>d['ack'] else str(d['count'])), 'retry-payload':(list(d['draft']) if d['error_revision']==d['sent'] else None)}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 1, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': 'updating', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': 'updating', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': 'updating', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None})], 2: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': True, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': 'updating', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': True, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': 'updating', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '0', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': True, 'dirty-count': 0, 'result-label': '0', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '0', 'retry-payload': ['x']})], 3: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '8', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': 'updating', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': True, 'dirty-count': 0, 'result-label': '8', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '8', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '8', 'retry-payload': ['x']})], 4: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '0', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': True, 'dirty-count': 2, 'result-label': '0', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '0', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '0', 'retry-payload': ['y']})], 5: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '8', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': True, 'dirty-count': 2, 'result-label': '8', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '8', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '8', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 1, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': 'updating', 'retry-payload': None})]}
for index, (data, expected) in enumerate(fixtures[N]):
    check("contract fixture " + str(index), solve(data), 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
contract fixture 0{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '0', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '0', 'retry-payload': None, 'revision-pending': False}Failed
contract fixture 1{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Passed
contract fixture 2{'dirty-count': 2, 'error-scope': False, 'result-fresh': True, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 2, 'error-scope': False, 'result-fresh': True, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}Passed
contract fixture 3{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}Passed
contract fixture 4{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}Passed
contract fixture 5{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Passed
contract fixture 6{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Passed
contract fixture 7{'dirty-count': 0, 'error-scope': False, 'result-fresh': True, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}{'dirty-count': 0, 'error-scope': False, 'result-fresh': True, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Passed
contract fixture 8{'dirty-count': 2, 'error-scope': False, 'result-fresh': True, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}{'dirty-count': 2, 'error-scope': False, 'result-fresh': True, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Passed
contract fixture 9{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Failed

SHA-256 / 2e48ff84432b0bd81039b6fdf1669355134d1b55209249b5e3912ac36f12e39b

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(d):
    return {'revision-pending':(d['sent']>=d['ack']), 'result-fresh':(d['result']==d['ack']), 'error-scope':(d['error_revision']==d['sent']), 'dirty-count':(len(set(d['draft']) ^ set(d['applied']))), 'result-label':('updating' if d['sent']>d['ack'] else str(d['count'])), 'retry-payload':(list(d['draft']) if d['error_revision']==d['sent'] else None)}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 1, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': 'updating', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': 'updating', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': 'updating', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None})], 2: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 1, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': True, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': 'updating', 'retry-payload': None}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': True, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': 'updating', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '0', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': True, 'dirty-count': 0, 'result-label': '0', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '0', 'retry-payload': ['x']})], 3: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '8', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 1, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': 'updating', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': True, 'dirty-count': 0, 'result-label': '8', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '8', 'retry-payload': ['x']}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 2, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 0, 'result-label': '8', 'retry-payload': ['x']})], 4: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '0', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': True, 'error-scope': True, 'dirty-count': 2, 'result-label': '0', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '0', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '0', 'retry-payload': ['y']})], 5: [({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 0}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '0', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': None, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 2, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 1, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '8', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 2, 'result': 2, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': True, 'error-scope': True, 'dirty-count': 2, 'result-label': '8', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 1, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '8', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': False, 'dirty-count': 0, 'result-label': '8', 'retry-payload': None}), ({'sent': 2, 'ack': 3, 'result': 2, 'error_revision': 2, 'draft': ['y'], 'applied': ['x'], 'count': 8}, {'revision-pending': False, 'result-fresh': False, 'error-scope': True, 'dirty-count': 2, 'result-label': '8', 'retry-payload': ['y']}), ({'sent': 2, 'ack': 1, 'result': 1, 'error_revision': 1, 'draft': ['x'], 'applied': ['x'], 'count': 8}, {'revision-pending': True, 'result-fresh': True, 'error-scope': False, 'dirty-count': 0, 'result-label': 'updating', 'retry-payload': None})]}
for index, (data, expected) in enumerate(fixtures[N]):
    check("contract fixture " + str(index), solve(data), 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
contract fixture 0{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '0', 'retry-payload': None, 'revision-pending': False}{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '0', 'retry-payload': None, 'revision-pending': False}Passed
contract fixture 1{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Failed
contract fixture 2{'dirty-count': 2, 'error-scope': False, 'result-fresh': True, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 2, 'error-scope': False, 'result-fresh': True, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}Passed
contract fixture 3{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}Passed
contract fixture 4{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': 'updating', 'retry-payload': None, 'revision-pending': True}Passed
contract fixture 5{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Failed
contract fixture 6{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 2, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Failed
contract fixture 7{'dirty-count': 0, 'error-scope': False, 'result-fresh': True, 'result-label': '8', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 0, 'error-scope': False, 'result-fresh': True, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Failed
contract fixture 8{'dirty-count': 2, 'error-scope': False, 'result-fresh': True, 'result-label': '8', 'retry-payload': None, 'revision-pending': True}{'dirty-count': 2, 'error-scope': False, 'result-fresh': True, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Failed
contract fixture 9{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}{'dirty-count': 0, 'error-scope': False, 'result-fresh': False, 'result-label': '8', 'retry-payload': None, 'revision-pending': False}Passed

SHA-256 / 5765c08ff4db1798536b1edec45160aee51f20d473f74f49be1fd392cb416c56

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This mechanism has 10 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

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Verification & scope

Deterministic bounded UI-state model only; no browser, query engine, network, or production-standard conformance is claimed. 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 2026-09-29T14:41:03.362911+00:00.

Case digest / 1ede56efbd251543f00026ca0b602eb19ba45259b52d96bd5b14f3cbda352c40