FAILURE MAP
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FA-34646 / Notification interfaces / Open access

Notification severity escalation acknowledgement: ack-warning from warning-unacknowledged · case 01

The ack-warning event leaves a notification in informational instead of warning-acknowledged.

Verified by executionVariant 1 · 38 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Acknowledging warning removes its severity entirely.

THE FAILURE

Acknowledging warning removes its severity entirely.

Unsuccessful approach: Using critical acknowledgement suppresses future escalation.

Case contract

Notification severity escalation acknowledgement is a bounded visual-notification workflow with mutable policy state {'occurrence': 1, 'acknowledged': [], 'active': True, 'level': 1}. Its default transition relation is {('informational', 'warning-arrives'): 'warning-unacknowledged', ('warning-unacknowledged', 'ack-warning'): 'warning-acknowledged', ('warning-acknowledged', 'critical-arrives'): 'critical-unacknowledged', ('critical-unacknowledged', 'ack-critical'): 'critical-acknowledged', ('critical-acknowledged', 'warning-arrives'): 'critical-acknowledged', ('critical-unacknowledged', 'condition-cleared'): 'resolved-unread', ('critical-acknowledged', 'condition-cleared'): 'resolved', ('resolved-unread', 'open-resolution'): 'resolved', ('resolved', 'recurrence'): 'warning-unacknowledged', ('warning-unacknowledged', 'critical-arrives'): 'critical-unacknowledged'}; domain inputs can suppress or redirect transitions and update policy fields, as specified in solve. Different-generation events are inert. Batches apply in order. Optional observe returns the selected policy field alongside the phase.

Why this case matters

Visual notification lifecycle ordering can leave an inbox or toast showing the wrong actionable state even when transport succeeds.

1 / The failure

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

N = 1
observations = []
def solve(initial, events, generation, payload=None, observe=None):
    table = {('informational', 'warning-arrives'): 'warning-unacknowledged', ('warning-unacknowledged', 'ack-warning'): 'informational', ('warning-acknowledged', 'critical-arrives'): 'critical-unacknowledged', ('critical-unacknowledged', 'ack-critical'): 'critical-acknowledged', ('critical-acknowledged', 'warning-arrives'): 'critical-acknowledged', ('critical-unacknowledged', 'condition-cleared'): 'resolved-unread', ('critical-acknowledged', 'condition-cleared'): 'resolved', ('resolved-unread', 'open-resolution'): 'resolved', ('resolved', 'recurrence'): 'warning-unacknowledged', ('warning-unacknowledged', 'critical-arrives'): 'critical-unacknowledged'}
    data = json.loads(json.dumps({'occurrence': 1, 'acknowledged': [], 'active': True, 'level': 1})) if payload is None else {**json.loads(json.dumps({'occurrence': 1, 'acknowledged': [], 'active': True, 'level': 1})), **json.loads(json.dumps(payload))}
    state = initial
    for delivery in events:
        event, event_generation = delivery[:2]
        arg = delivery[2] if len(delivery) > 2 else {}
        if event_generation == generation:
            previous = state
            if event in ('ack-warning','ack-critical') and arg.get('occurrence',data['occurrence']) != data['occurrence']: event = 'unknown-event'
            if event == 'recurrence': data['occurrence'] += 1
            state = table.get((state, event), state)
            if state.startswith('critical-'): data['level'] = 3
            if state.startswith('warning-'): data['level'] = 2
            if state.endswith('-acknowledged') and data['occurrence'] not in data['acknowledged']: data['acknowledged'].append(data['occurrence'])
            if state.startswith('resolved'): data['active'] = False
            if state == 'warning-unacknowledged': data['active'] = True
    return {'phase': state, 'value': data[observe]} if observe else state
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('informational / warning-arrives', solve('informational', [('warning-arrives', N)], N), 'warning-unacknowledged')
check('warning-unacknowledged / ack-warning', solve('warning-unacknowledged', [('ack-warning', N)], N), 'warning-acknowledged')
check('warning-acknowledged / critical-arrives', solve('warning-acknowledged', [('critical-arrives', N)], N), 'critical-unacknowledged')
check('critical-unacknowledged / ack-critical', solve('critical-unacknowledged', [('ack-critical', N)], N), 'critical-acknowledged')
check('critical-acknowledged / warning-arrives', solve('critical-acknowledged', [('warning-arrives', N)], N), 'critical-acknowledged')
check('critical-unacknowledged / condition-cleared', solve('critical-unacknowledged', [('condition-cleared', N)], N), 'resolved-unread')
check('critical-acknowledged / condition-cleared', solve('critical-acknowledged', [('condition-cleared', N)], N), 'resolved')
check('resolved-unread / open-resolution', solve('resolved-unread', [('open-resolution', N)], N), 'resolved')
check('resolved / recurrence', solve('resolved', [('recurrence', N)], N), 'warning-unacknowledged')
check('warning-unacknowledged / critical-arrives', solve('warning-unacknowledged', [('critical-arrives', N)], N), 'critical-unacknowledged')
check('older notification incarnation', solve('informational', [('warning-arrives', N - 1)], N), 'informational')
check('future notification incarnation', solve('informational', [('warning-arrives', N + 1)], N), 'informational')
check('unknown event is inert', solve('informational', [('unknown-event', N)], N), 'informational')
check('empty delivery batch', solve('informational', [], N), 'informational')
check('N stale deliveries before current delivery', solve('informational', [('warning-arrives', N - 1)] * N + [('warning-arrives', N)], N), 'warning-unacknowledged')
check('trace warning-arrives then ack-warning', solve('informational', [('warning-arrives', N), ('ack-warning', N)], N), 'warning-acknowledged')
check('trace warning-arrives then critical-arrives', solve('informational', [('warning-arrives', N), ('critical-arrives', N)], N), 'critical-unacknowledged')
check('trace ack-warning then critical-arrives', solve('warning-unacknowledged', [('ack-warning', N), ('critical-arrives', N)], N), 'critical-unacknowledged')
check('trace critical-arrives then ack-critical', solve('warning-acknowledged', [('critical-arrives', N), ('ack-critical', N)], N), 'critical-acknowledged')
check('trace critical-arrives then condition-cleared', solve('warning-acknowledged', [('critical-arrives', N), ('condition-cleared', N)], N), 'resolved-unread')
check('trace ack-critical then warning-arrives', solve('critical-unacknowledged', [('ack-critical', N), ('warning-arrives', N)], N), 'critical-acknowledged')
check('trace ack-critical then condition-cleared', solve('critical-unacknowledged', [('ack-critical', N), ('condition-cleared', N)], N), 'resolved')
check('trace warning-arrives then warning-arrives', solve('critical-acknowledged', [('warning-arrives', N), ('warning-arrives', N)], N), 'critical-acknowledged')
check('trace warning-arrives then condition-cleared', solve('critical-acknowledged', [('warning-arrives', N), ('condition-cleared', N)], N), 'resolved')
check('trace condition-cleared then open-resolution', solve('critical-unacknowledged', [('condition-cleared', N), ('open-resolution', N)], N), 'resolved')
check('trace condition-cleared then recurrence', solve('critical-acknowledged', [('condition-cleared', N), ('recurrence', N)], N), 'warning-unacknowledged')
check('trace open-resolution then recurrence', solve('resolved-unread', [('open-resolution', N), ('recurrence', N)], N), 'warning-unacknowledged')
check('trace recurrence then ack-warning', solve('resolved', [('recurrence', N), ('ack-warning', N)], N), 'warning-acknowledged')
check('trace recurrence then critical-arrives', solve('resolved', [('recurrence', N), ('critical-arrives', N)], N), 'critical-unacknowledged')
check('trace critical-arrives then ack-critical', solve('warning-unacknowledged', [('critical-arrives', N), ('ack-critical', N)], N), 'critical-acknowledged')
check('trace critical-arrives then condition-cleared', solve('warning-unacknowledged', [('critical-arrives', N), ('condition-cleared', N)], N), 'resolved-unread')
check('domain state regression 1: acknowledged', solve('critical-unacknowledged', [('ack-critical', N, {'occurrence': 0})], N, {}, 'acknowledged'), {'phase': 'critical-unacknowledged', 'value': []})
check('domain state regression 2: acknowledged', solve('critical-unacknowledged', [('ack-critical', N, {'occurrence': 1})], N, {}, 'acknowledged'), {'phase': 'critical-acknowledged', 'value': [1]})
check('domain state regression 3: level', solve('warning-acknowledged', [('critical-arrives', N, {})], N, {'level': 2}, 'level'), {'phase': 'critical-unacknowledged', 'value': 3})
check('domain state regression 4: level', solve('critical-acknowledged', [('warning-arrives', N, {})], N, {'level': 3}, 'level'), {'phase': 'critical-acknowledged', 'value': 3})
check('domain state regression 5: active', solve('critical-unacknowledged', [('condition-cleared', N, {})], N, {}, 'active'), {'phase': 'resolved-unread', 'value': False})
check('domain state regression 6: occurrence', solve('resolved', [('recurrence', N, {})], N, {'acknowledged': [1], 'active': False}, 'occurrence'), {'phase': 'warning-unacknowledged', 'value': 2})
check('domain state regression 7: occurrence', solve('warning-unacknowledged', [('ack-warning', N, {}), ('critical-arrives', N, {}), ('condition-cleared', N, {}), ('open-resolution', N, {}), ('recurrence', N, {})], N, {}, 'occurrence'), {'phase': 'warning-unacknowledged', 'value': 2})
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
informational / warning-arriveswarning-unacknowledgedwarning-unacknowledgedPassed
warning-unacknowledged / ack-warninginformationalwarning-acknowledgedFailed
warning-acknowledged / critical-arrivescritical-unacknowledgedcritical-unacknowledgedPassed
critical-unacknowledged / ack-criticalcritical-acknowledgedcritical-acknowledgedPassed
critical-acknowledged / warning-arrivescritical-acknowledgedcritical-acknowledgedPassed
critical-unacknowledged / condition-clearedresolved-unreadresolved-unreadPassed
critical-acknowledged / condition-clearedresolvedresolvedPassed
resolved-unread / open-resolutionresolvedresolvedPassed
resolved / recurrencewarning-unacknowledgedwarning-unacknowledgedPassed
warning-unacknowledged / critical-arrivescritical-unacknowledgedcritical-unacknowledgedPassed
older notification incarnationinformationalinformationalPassed
future notification incarnationinformationalinformationalPassed
unknown event is inertinformationalinformationalPassed
empty delivery batchinformationalinformationalPassed
N stale deliveries before current deliverywarning-unacknowledgedwarning-unacknowledgedPassed
trace warning-arrives then ack-warninginformationalwarning-acknowledgedFailed
trace warning-arrives then critical-arrivescritical-unacknowledgedcritical-unacknowledgedPassed
trace ack-warning then critical-arrivesinformationalcritical-unacknowledgedFailed
trace critical-arrives then ack-criticalcritical-acknowledgedcritical-acknowledgedPassed
trace critical-arrives then condition-clearedresolved-unreadresolved-unreadPassed
trace ack-critical then warning-arrivescritical-acknowledgedcritical-acknowledgedPassed
trace ack-critical then condition-clearedresolvedresolvedPassed
trace warning-arrives then warning-arrivescritical-acknowledgedcritical-acknowledgedPassed
trace warning-arrives then condition-clearedresolvedresolvedPassed
trace condition-cleared then open-resolutionresolvedresolvedPassed
trace condition-cleared then recurrencewarning-unacknowledgedwarning-unacknowledgedPassed
trace open-resolution then recurrencewarning-unacknowledgedwarning-unacknowledgedPassed
trace recurrence then ack-warninginformationalwarning-acknowledgedFailed
trace recurrence then critical-arrivescritical-unacknowledgedcritical-unacknowledgedPassed
trace critical-arrives then ack-criticalcritical-acknowledgedcritical-acknowledgedPassed
trace critical-arrives then condition-clearedresolved-unreadresolved-unreadPassed
domain state regression 1: acknowledged{'phase': 'critical-unacknowledged', 'value': []}{'phase': 'critical-unacknowledged', 'value': []}Passed
domain state regression 2: acknowledged{'phase': 'critical-acknowledged', 'value': [1]}{'phase': 'critical-acknowledged', 'value': [1]}Passed
domain state regression 3: level{'phase': 'critical-unacknowledged', 'value': 3}{'phase': 'critical-unacknowledged', 'value': 3}Passed
domain state regression 4: level{'phase': 'critical-acknowledged', 'value': 3}{'phase': 'critical-acknowledged', 'value': 3}Passed
domain state regression 5: active{'phase': 'resolved-unread', 'value': False}{'phase': 'resolved-unread', 'value': False}Passed
domain state regression 6: occurrence{'phase': 'warning-unacknowledged', 'value': 2}{'phase': 'warning-unacknowledged', 'value': 2}Passed
domain state regression 7: occurrence{'phase': 'informational', 'value': 2}{'phase': 'warning-unacknowledged', 'value': 2}Failed

SHA-256 / ec6f24819886d51649be3c941ef2902f4342173aefbf8ad76aa79b319972e450

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(initial, events, generation, payload=None, observe=None):
    table = {('informational', 'warning-arrives'): 'warning-unacknowledged', ('warning-unacknowledged', 'ack-warning'): 'critical-acknowledged', ('warning-acknowledged', 'critical-arrives'): 'critical-unacknowledged', ('critical-unacknowledged', 'ack-critical'): 'critical-acknowledged', ('critical-acknowledged', 'warning-arrives'): 'critical-acknowledged', ('critical-unacknowledged', 'condition-cleared'): 'resolved-unread', ('critical-acknowledged', 'condition-cleared'): 'resolved', ('resolved-unread', 'open-resolution'): 'resolved', ('resolved', 'recurrence'): 'warning-unacknowledged', ('warning-unacknowledged', 'critical-arrives'): 'critical-unacknowledged'}
    data = json.loads(json.dumps({'occurrence': 1, 'acknowledged': [], 'active': True, 'level': 1})) if payload is None else {**json.loads(json.dumps({'occurrence': 1, 'acknowledged': [], 'active': True, 'level': 1})), **json.loads(json.dumps(payload))}
    state = initial
    for delivery in events:
        event, event_generation = delivery[:2]
        arg = delivery[2] if len(delivery) > 2 else {}
        if event_generation == generation:
            previous = state
            if event in ('ack-warning','ack-critical') and arg.get('occurrence',data['occurrence']) != data['occurrence']: event = 'unknown-event'
            if event == 'recurrence': data['occurrence'] += 1
            state = table.get((state, event), state)
            if state.startswith('critical-'): data['level'] = 3
            if state.startswith('warning-'): data['level'] = 2
            if state.endswith('-acknowledged') and data['occurrence'] not in data['acknowledged']: data['acknowledged'].append(data['occurrence'])
            if state.startswith('resolved'): data['active'] = False
            if state == 'warning-unacknowledged': data['active'] = True
    return {'phase': state, 'value': data[observe]} if observe else state
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('informational / warning-arrives', solve('informational', [('warning-arrives', N)], N), 'warning-unacknowledged')
check('warning-unacknowledged / ack-warning', solve('warning-unacknowledged', [('ack-warning', N)], N), 'warning-acknowledged')
check('warning-acknowledged / critical-arrives', solve('warning-acknowledged', [('critical-arrives', N)], N), 'critical-unacknowledged')
check('critical-unacknowledged / ack-critical', solve('critical-unacknowledged', [('ack-critical', N)], N), 'critical-acknowledged')
check('critical-acknowledged / warning-arrives', solve('critical-acknowledged', [('warning-arrives', N)], N), 'critical-acknowledged')
check('critical-unacknowledged / condition-cleared', solve('critical-unacknowledged', [('condition-cleared', N)], N), 'resolved-unread')
check('critical-acknowledged / condition-cleared', solve('critical-acknowledged', [('condition-cleared', N)], N), 'resolved')
check('resolved-unread / open-resolution', solve('resolved-unread', [('open-resolution', N)], N), 'resolved')
check('resolved / recurrence', solve('resolved', [('recurrence', N)], N), 'warning-unacknowledged')
check('warning-unacknowledged / critical-arrives', solve('warning-unacknowledged', [('critical-arrives', N)], N), 'critical-unacknowledged')
check('older notification incarnation', solve('informational', [('warning-arrives', N - 1)], N), 'informational')
check('future notification incarnation', solve('informational', [('warning-arrives', N + 1)], N), 'informational')
check('unknown event is inert', solve('informational', [('unknown-event', N)], N), 'informational')
check('empty delivery batch', solve('informational', [], N), 'informational')
check('N stale deliveries before current delivery', solve('informational', [('warning-arrives', N - 1)] * N + [('warning-arrives', N)], N), 'warning-unacknowledged')
check('trace warning-arrives then ack-warning', solve('informational', [('warning-arrives', N), ('ack-warning', N)], N), 'warning-acknowledged')
check('trace warning-arrives then critical-arrives', solve('informational', [('warning-arrives', N), ('critical-arrives', N)], N), 'critical-unacknowledged')
check('trace ack-warning then critical-arrives', solve('warning-unacknowledged', [('ack-warning', N), ('critical-arrives', N)], N), 'critical-unacknowledged')
check('trace critical-arrives then ack-critical', solve('warning-acknowledged', [('critical-arrives', N), ('ack-critical', N)], N), 'critical-acknowledged')
check('trace critical-arrives then condition-cleared', solve('warning-acknowledged', [('critical-arrives', N), ('condition-cleared', N)], N), 'resolved-unread')
check('trace ack-critical then warning-arrives', solve('critical-unacknowledged', [('ack-critical', N), ('warning-arrives', N)], N), 'critical-acknowledged')
check('trace ack-critical then condition-cleared', solve('critical-unacknowledged', [('ack-critical', N), ('condition-cleared', N)], N), 'resolved')
check('trace warning-arrives then warning-arrives', solve('critical-acknowledged', [('warning-arrives', N), ('warning-arrives', N)], N), 'critical-acknowledged')
check('trace warning-arrives then condition-cleared', solve('critical-acknowledged', [('warning-arrives', N), ('condition-cleared', N)], N), 'resolved')
check('trace condition-cleared then open-resolution', solve('critical-unacknowledged', [('condition-cleared', N), ('open-resolution', N)], N), 'resolved')
check('trace condition-cleared then recurrence', solve('critical-acknowledged', [('condition-cleared', N), ('recurrence', N)], N), 'warning-unacknowledged')
check('trace open-resolution then recurrence', solve('resolved-unread', [('open-resolution', N), ('recurrence', N)], N), 'warning-unacknowledged')
check('trace recurrence then ack-warning', solve('resolved', [('recurrence', N), ('ack-warning', N)], N), 'warning-acknowledged')
check('trace recurrence then critical-arrives', solve('resolved', [('recurrence', N), ('critical-arrives', N)], N), 'critical-unacknowledged')
check('trace critical-arrives then ack-critical', solve('warning-unacknowledged', [('critical-arrives', N), ('ack-critical', N)], N), 'critical-acknowledged')
check('trace critical-arrives then condition-cleared', solve('warning-unacknowledged', [('critical-arrives', N), ('condition-cleared', N)], N), 'resolved-unread')
check('domain state regression 1: acknowledged', solve('critical-unacknowledged', [('ack-critical', N, {'occurrence': 0})], N, {}, 'acknowledged'), {'phase': 'critical-unacknowledged', 'value': []})
check('domain state regression 2: acknowledged', solve('critical-unacknowledged', [('ack-critical', N, {'occurrence': 1})], N, {}, 'acknowledged'), {'phase': 'critical-acknowledged', 'value': [1]})
check('domain state regression 3: level', solve('warning-acknowledged', [('critical-arrives', N, {})], N, {'level': 2}, 'level'), {'phase': 'critical-unacknowledged', 'value': 3})
check('domain state regression 4: level', solve('critical-acknowledged', [('warning-arrives', N, {})], N, {'level': 3}, 'level'), {'phase': 'critical-acknowledged', 'value': 3})
check('domain state regression 5: active', solve('critical-unacknowledged', [('condition-cleared', N, {})], N, {}, 'active'), {'phase': 'resolved-unread', 'value': False})
check('domain state regression 6: occurrence', solve('resolved', [('recurrence', N, {})], N, {'acknowledged': [1], 'active': False}, 'occurrence'), {'phase': 'warning-unacknowledged', 'value': 2})
check('domain state regression 7: occurrence', solve('warning-unacknowledged', [('ack-warning', N, {}), ('critical-arrives', N, {}), ('condition-cleared', N, {}), ('open-resolution', N, {}), ('recurrence', N, {})], N, {}, 'occurrence'), {'phase': 'warning-unacknowledged', 'value': 2})
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
informational / warning-arriveswarning-unacknowledgedwarning-unacknowledgedPassed
warning-unacknowledged / ack-warningcritical-acknowledgedwarning-acknowledgedFailed
warning-acknowledged / critical-arrivescritical-unacknowledgedcritical-unacknowledgedPassed
critical-unacknowledged / ack-criticalcritical-acknowledgedcritical-acknowledgedPassed
critical-acknowledged / warning-arrivescritical-acknowledgedcritical-acknowledgedPassed
critical-unacknowledged / condition-clearedresolved-unreadresolved-unreadPassed
critical-acknowledged / condition-clearedresolvedresolvedPassed
resolved-unread / open-resolutionresolvedresolvedPassed
resolved / recurrencewarning-unacknowledgedwarning-unacknowledgedPassed
warning-unacknowledged / critical-arrivescritical-unacknowledgedcritical-unacknowledgedPassed
older notification incarnationinformationalinformationalPassed
future notification incarnationinformationalinformationalPassed
unknown event is inertinformationalinformationalPassed
empty delivery batchinformationalinformationalPassed
N stale deliveries before current deliverywarning-unacknowledgedwarning-unacknowledgedPassed
trace warning-arrives then ack-warningcritical-acknowledgedwarning-acknowledgedFailed
trace warning-arrives then critical-arrivescritical-unacknowledgedcritical-unacknowledgedPassed
trace ack-warning then critical-arrivescritical-acknowledgedcritical-unacknowledgedFailed
trace critical-arrives then ack-criticalcritical-acknowledgedcritical-acknowledgedPassed
trace critical-arrives then condition-clearedresolved-unreadresolved-unreadPassed
trace ack-critical then warning-arrivescritical-acknowledgedcritical-acknowledgedPassed
trace ack-critical then condition-clearedresolvedresolvedPassed
trace warning-arrives then warning-arrivescritical-acknowledgedcritical-acknowledgedPassed
trace warning-arrives then condition-clearedresolvedresolvedPassed
trace condition-cleared then open-resolutionresolvedresolvedPassed
trace condition-cleared then recurrencewarning-unacknowledgedwarning-unacknowledgedPassed
trace open-resolution then recurrencewarning-unacknowledgedwarning-unacknowledgedPassed
trace recurrence then ack-warningcritical-acknowledgedwarning-acknowledgedFailed
trace recurrence then critical-arrivescritical-unacknowledgedcritical-unacknowledgedPassed
trace critical-arrives then ack-criticalcritical-acknowledgedcritical-acknowledgedPassed
trace critical-arrives then condition-clearedresolved-unreadresolved-unreadPassed
domain state regression 1: acknowledged{'phase': 'critical-unacknowledged', 'value': []}{'phase': 'critical-unacknowledged', 'value': []}Passed
domain state regression 2: acknowledged{'phase': 'critical-acknowledged', 'value': [1]}{'phase': 'critical-acknowledged', 'value': [1]}Passed
domain state regression 3: level{'phase': 'critical-unacknowledged', 'value': 3}{'phase': 'critical-unacknowledged', 'value': 3}Passed
domain state regression 4: level{'phase': 'critical-acknowledged', 'value': 3}{'phase': 'critical-acknowledged', 'value': 3}Passed
domain state regression 5: active{'phase': 'resolved-unread', 'value': False}{'phase': 'resolved-unread', 'value': False}Passed
domain state regression 6: occurrence{'phase': 'warning-unacknowledged', 'value': 2}{'phase': 'warning-unacknowledged', 'value': 2}Passed
domain state regression 7: occurrence{'phase': 'warning-unacknowledged', 'value': 2}{'phase': 'warning-unacknowledged', 'value': 2}Passed

SHA-256 / 31496e19602359b67e2e36d87b8fa371a8ef27e6c57bbcbbeee67358740c3ab6

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The verified repair and its recorded checks are member-only.

This mechanism has 38 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

Stipulated single-notification state and policy model only. Event delivery and acknowledgements are explicit test inputs. No DOM, accessibility announcements, live timers, networking, actual rendering, or production-platform conformance is simulated. 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 2026-09-29T14:42:34.344858+00:00.

Case digest / 28bc68fd8561b725194b29f9f2e257b52aa570b334bc17be6fe57b4f73ddd975