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FA-35096 / Notification interfaces / Open access

Time-limited notification content expiry: deadline-reached from expiring · case 01

The deadline-reached event leaves a notification in valid instead of expired.

Verified by executionVariant 1 · 34 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Expired action content remains fully actionable.

THE FAILURE

Expired action content remains fully actionable.

Unsuccessful approach: Keeping only a warning still permits actions beyond validity.

Case contract

Time-limited notification content expiry is a bounded visual-notification workflow with mutable policy state {'deadline': 20, 'now': 5, 'started': None, 'completed': False}. Its default transition relation is {('valid', 'deadline-near'): 'expiring', ('expiring', 'deadline-reached'): 'expired', ('valid', 'open-action'): 'action-pending', ('action-pending', 'deadline-reached'): 'pending-at-expiry', ('pending-at-expiry', 'action-success'): 'completed', ('pending-at-expiry', 'action-failure'): 'expired-action-error', ('expired', 'deadline-extension'): 'revalidation-pending', ('revalidation-pending', 'extension-validated'): 'valid', ('revalidation-pending', 'extension-rejected'): 'expired', ('completed', 'late-expiry'): 'completed'}; 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 = {('valid', 'deadline-near'): 'expiring', ('expiring', 'deadline-reached'): 'valid', ('valid', 'open-action'): 'action-pending', ('action-pending', 'deadline-reached'): 'pending-at-expiry', ('pending-at-expiry', 'action-success'): 'completed', ('pending-at-expiry', 'action-failure'): 'expired-action-error', ('expired', 'deadline-extension'): 'revalidation-pending', ('revalidation-pending', 'extension-validated'): 'valid', ('revalidation-pending', 'extension-rejected'): 'expired', ('completed', 'late-expiry'): 'completed'}
    data = json.loads(json.dumps({'deadline': 20, 'now': 5, 'started': None, 'completed': False})) if payload is None else {**json.loads(json.dumps({'deadline': 20, 'now': 5, 'started': None, 'completed': False})), **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
            data['now'] = max(data['now'],arg.get('now',data['now']))
            if event == 'open-action':
                if data['now'] >= data['deadline']: event = 'unknown-event'
                else: data['started'] = data['now']
            if event == 'deadline-reached' and data['now'] < data['deadline'] and 'now' in arg: event = 'unknown-event'
            if event == 'extension-validated': data['deadline'] = max(data['deadline'],arg.get('deadline',data['deadline']+10))
            state = table.get((state, event), state)
            if state == 'completed': data['completed'] = 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('valid / deadline-near', solve('valid', [('deadline-near', N)], N), 'expiring')
check('expiring / deadline-reached', solve('expiring', [('deadline-reached', N)], N), 'expired')
check('valid / open-action', solve('valid', [('open-action', N)], N), 'action-pending')
check('action-pending / deadline-reached', solve('action-pending', [('deadline-reached', N)], N), 'pending-at-expiry')
check('pending-at-expiry / action-success', solve('pending-at-expiry', [('action-success', N)], N), 'completed')
check('pending-at-expiry / action-failure', solve('pending-at-expiry', [('action-failure', N)], N), 'expired-action-error')
check('expired / deadline-extension', solve('expired', [('deadline-extension', N)], N), 'revalidation-pending')
check('revalidation-pending / extension-validated', solve('revalidation-pending', [('extension-validated', N)], N), 'valid')
check('revalidation-pending / extension-rejected', solve('revalidation-pending', [('extension-rejected', N)], N), 'expired')
check('completed / late-expiry', solve('completed', [('late-expiry', N)], N), 'completed')
check('older notification incarnation', solve('valid', [('deadline-near', N - 1)], N), 'valid')
check('future notification incarnation', solve('valid', [('deadline-near', N + 1)], N), 'valid')
check('unknown event is inert', solve('valid', [('unknown-event', N)], N), 'valid')
check('empty delivery batch', solve('valid', [], N), 'valid')
check('N stale deliveries before current delivery', solve('valid', [('deadline-near', N - 1)] * N + [('deadline-near', N)], N), 'expiring')
check('trace deadline-near then deadline-reached', solve('valid', [('deadline-near', N), ('deadline-reached', N)], N), 'expired')
check('trace deadline-reached then deadline-extension', solve('expiring', [('deadline-reached', N), ('deadline-extension', N)], N), 'revalidation-pending')
check('trace open-action then deadline-reached', solve('valid', [('open-action', N), ('deadline-reached', N)], N), 'pending-at-expiry')
check('trace deadline-reached then action-success', solve('action-pending', [('deadline-reached', N), ('action-success', N)], N), 'completed')
check('trace deadline-reached then action-failure', solve('action-pending', [('deadline-reached', N), ('action-failure', N)], N), 'expired-action-error')
check('trace action-success then late-expiry', solve('pending-at-expiry', [('action-success', N), ('late-expiry', N)], N), 'completed')
check('trace deadline-extension then extension-validated', solve('expired', [('deadline-extension', N), ('extension-validated', N)], N), 'valid')
check('trace deadline-extension then extension-rejected', solve('expired', [('deadline-extension', N), ('extension-rejected', N)], N), 'expired')
check('trace extension-validated then deadline-near', solve('revalidation-pending', [('extension-validated', N), ('deadline-near', N)], N), 'expiring')
check('trace extension-validated then open-action', solve('revalidation-pending', [('extension-validated', N), ('open-action', N)], N), 'action-pending')
check('trace extension-rejected then deadline-extension', solve('revalidation-pending', [('extension-rejected', N), ('deadline-extension', N)], N), 'revalidation-pending')
check('trace late-expiry then late-expiry', solve('completed', [('late-expiry', N), ('late-expiry', N)], N), 'completed')
check('domain state regression 1: started', solve('valid', [('open-action', N, {'now': 19})], N, {}, 'started'), {'phase': 'action-pending', 'value': 19})
check('domain state regression 2: started', solve('valid', [('open-action', N, {'now': 20})], N, {}, 'started'), {'phase': 'valid', 'value': None})
check('domain state regression 3: now', solve('expiring', [('deadline-reached', N, {'now': 19})], N, {}, 'now'), {'phase': 'expiring', 'value': 19})
check('domain state regression 4: completed', solve('pending-at-expiry', [('action-success', N, {})], N, {'started': 19, 'now': 21}, 'completed'), {'phase': 'completed', 'value': True})
check('domain state regression 5: deadline', solve('revalidation-pending', [('extension-validated', N, {'deadline': 15})], N, {}, 'deadline'), {'phase': 'valid', 'value': 20})
check('domain state regression 6: completed', solve('completed', [('late-expiry', N, {})], N, {'completed': True}, 'completed'), {'phase': 'completed', 'value': True})
check('domain state regression 7: started', solve('valid', [('open-action', N, {'now': 19}), ('deadline-reached', N, {'now': 20}), ('action-success', N, {})], N, {}, 'started'), {'phase': 'completed', 'value': 19})
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
valid / deadline-nearexpiringexpiringPassed
expiring / deadline-reachedvalidexpiredFailed
valid / open-actionaction-pendingaction-pendingPassed
action-pending / deadline-reachedpending-at-expirypending-at-expiryPassed
pending-at-expiry / action-successcompletedcompletedPassed
pending-at-expiry / action-failureexpired-action-errorexpired-action-errorPassed
expired / deadline-extensionrevalidation-pendingrevalidation-pendingPassed
revalidation-pending / extension-validatedvalidvalidPassed
revalidation-pending / extension-rejectedexpiredexpiredPassed
completed / late-expirycompletedcompletedPassed
older notification incarnationvalidvalidPassed
future notification incarnationvalidvalidPassed
unknown event is inertvalidvalidPassed
empty delivery batchvalidvalidPassed
N stale deliveries before current deliveryexpiringexpiringPassed
trace deadline-near then deadline-reachedvalidexpiredFailed
trace deadline-reached then deadline-extensionvalidrevalidation-pendingFailed
trace open-action then deadline-reachedpending-at-expirypending-at-expiryPassed
trace deadline-reached then action-successcompletedcompletedPassed
trace deadline-reached then action-failureexpired-action-errorexpired-action-errorPassed
trace action-success then late-expirycompletedcompletedPassed
trace deadline-extension then extension-validatedvalidvalidPassed
trace deadline-extension then extension-rejectedexpiredexpiredPassed
trace extension-validated then deadline-nearexpiringexpiringPassed
trace extension-validated then open-actionaction-pendingaction-pendingPassed
trace extension-rejected then deadline-extensionrevalidation-pendingrevalidation-pendingPassed
trace late-expiry then late-expirycompletedcompletedPassed
domain state regression 1: started{'phase': 'action-pending', 'value': 19}{'phase': 'action-pending', 'value': 19}Passed
domain state regression 2: started{'phase': 'valid', 'value': None}{'phase': 'valid', 'value': None}Passed
domain state regression 3: now{'phase': 'expiring', 'value': 19}{'phase': 'expiring', 'value': 19}Passed
domain state regression 4: completed{'phase': 'completed', 'value': True}{'phase': 'completed', 'value': True}Passed
domain state regression 5: deadline{'phase': 'valid', 'value': 20}{'phase': 'valid', 'value': 20}Passed
domain state regression 6: completed{'phase': 'completed', 'value': True}{'phase': 'completed', 'value': True}Passed
domain state regression 7: started{'phase': 'completed', 'value': 19}{'phase': 'completed', 'value': 19}Passed

SHA-256 / aa59d5ba195727f51d901f9f347477936189780326ec69ffd1d2dcd6aeb10d35

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 = {('valid', 'deadline-near'): 'expiring', ('expiring', 'deadline-reached'): 'expiring', ('valid', 'open-action'): 'action-pending', ('action-pending', 'deadline-reached'): 'pending-at-expiry', ('pending-at-expiry', 'action-success'): 'completed', ('pending-at-expiry', 'action-failure'): 'expired-action-error', ('expired', 'deadline-extension'): 'revalidation-pending', ('revalidation-pending', 'extension-validated'): 'valid', ('revalidation-pending', 'extension-rejected'): 'expired', ('completed', 'late-expiry'): 'completed'}
    data = json.loads(json.dumps({'deadline': 20, 'now': 5, 'started': None, 'completed': False})) if payload is None else {**json.loads(json.dumps({'deadline': 20, 'now': 5, 'started': None, 'completed': False})), **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
            data['now'] = max(data['now'],arg.get('now',data['now']))
            if event == 'open-action':
                if data['now'] >= data['deadline']: event = 'unknown-event'
                else: data['started'] = data['now']
            if event == 'deadline-reached' and data['now'] < data['deadline'] and 'now' in arg: event = 'unknown-event'
            if event == 'extension-validated': data['deadline'] = max(data['deadline'],arg.get('deadline',data['deadline']+10))
            state = table.get((state, event), state)
            if state == 'completed': data['completed'] = 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('valid / deadline-near', solve('valid', [('deadline-near', N)], N), 'expiring')
check('expiring / deadline-reached', solve('expiring', [('deadline-reached', N)], N), 'expired')
check('valid / open-action', solve('valid', [('open-action', N)], N), 'action-pending')
check('action-pending / deadline-reached', solve('action-pending', [('deadline-reached', N)], N), 'pending-at-expiry')
check('pending-at-expiry / action-success', solve('pending-at-expiry', [('action-success', N)], N), 'completed')
check('pending-at-expiry / action-failure', solve('pending-at-expiry', [('action-failure', N)], N), 'expired-action-error')
check('expired / deadline-extension', solve('expired', [('deadline-extension', N)], N), 'revalidation-pending')
check('revalidation-pending / extension-validated', solve('revalidation-pending', [('extension-validated', N)], N), 'valid')
check('revalidation-pending / extension-rejected', solve('revalidation-pending', [('extension-rejected', N)], N), 'expired')
check('completed / late-expiry', solve('completed', [('late-expiry', N)], N), 'completed')
check('older notification incarnation', solve('valid', [('deadline-near', N - 1)], N), 'valid')
check('future notification incarnation', solve('valid', [('deadline-near', N + 1)], N), 'valid')
check('unknown event is inert', solve('valid', [('unknown-event', N)], N), 'valid')
check('empty delivery batch', solve('valid', [], N), 'valid')
check('N stale deliveries before current delivery', solve('valid', [('deadline-near', N - 1)] * N + [('deadline-near', N)], N), 'expiring')
check('trace deadline-near then deadline-reached', solve('valid', [('deadline-near', N), ('deadline-reached', N)], N), 'expired')
check('trace deadline-reached then deadline-extension', solve('expiring', [('deadline-reached', N), ('deadline-extension', N)], N), 'revalidation-pending')
check('trace open-action then deadline-reached', solve('valid', [('open-action', N), ('deadline-reached', N)], N), 'pending-at-expiry')
check('trace deadline-reached then action-success', solve('action-pending', [('deadline-reached', N), ('action-success', N)], N), 'completed')
check('trace deadline-reached then action-failure', solve('action-pending', [('deadline-reached', N), ('action-failure', N)], N), 'expired-action-error')
check('trace action-success then late-expiry', solve('pending-at-expiry', [('action-success', N), ('late-expiry', N)], N), 'completed')
check('trace deadline-extension then extension-validated', solve('expired', [('deadline-extension', N), ('extension-validated', N)], N), 'valid')
check('trace deadline-extension then extension-rejected', solve('expired', [('deadline-extension', N), ('extension-rejected', N)], N), 'expired')
check('trace extension-validated then deadline-near', solve('revalidation-pending', [('extension-validated', N), ('deadline-near', N)], N), 'expiring')
check('trace extension-validated then open-action', solve('revalidation-pending', [('extension-validated', N), ('open-action', N)], N), 'action-pending')
check('trace extension-rejected then deadline-extension', solve('revalidation-pending', [('extension-rejected', N), ('deadline-extension', N)], N), 'revalidation-pending')
check('trace late-expiry then late-expiry', solve('completed', [('late-expiry', N), ('late-expiry', N)], N), 'completed')
check('domain state regression 1: started', solve('valid', [('open-action', N, {'now': 19})], N, {}, 'started'), {'phase': 'action-pending', 'value': 19})
check('domain state regression 2: started', solve('valid', [('open-action', N, {'now': 20})], N, {}, 'started'), {'phase': 'valid', 'value': None})
check('domain state regression 3: now', solve('expiring', [('deadline-reached', N, {'now': 19})], N, {}, 'now'), {'phase': 'expiring', 'value': 19})
check('domain state regression 4: completed', solve('pending-at-expiry', [('action-success', N, {})], N, {'started': 19, 'now': 21}, 'completed'), {'phase': 'completed', 'value': True})
check('domain state regression 5: deadline', solve('revalidation-pending', [('extension-validated', N, {'deadline': 15})], N, {}, 'deadline'), {'phase': 'valid', 'value': 20})
check('domain state regression 6: completed', solve('completed', [('late-expiry', N, {})], N, {'completed': True}, 'completed'), {'phase': 'completed', 'value': True})
check('domain state regression 7: started', solve('valid', [('open-action', N, {'now': 19}), ('deadline-reached', N, {'now': 20}), ('action-success', N, {})], N, {}, 'started'), {'phase': 'completed', 'value': 19})
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
valid / deadline-nearexpiringexpiringPassed
expiring / deadline-reachedexpiringexpiredFailed
valid / open-actionaction-pendingaction-pendingPassed
action-pending / deadline-reachedpending-at-expirypending-at-expiryPassed
pending-at-expiry / action-successcompletedcompletedPassed
pending-at-expiry / action-failureexpired-action-errorexpired-action-errorPassed
expired / deadline-extensionrevalidation-pendingrevalidation-pendingPassed
revalidation-pending / extension-validatedvalidvalidPassed
revalidation-pending / extension-rejectedexpiredexpiredPassed
completed / late-expirycompletedcompletedPassed
older notification incarnationvalidvalidPassed
future notification incarnationvalidvalidPassed
unknown event is inertvalidvalidPassed
empty delivery batchvalidvalidPassed
N stale deliveries before current deliveryexpiringexpiringPassed
trace deadline-near then deadline-reachedexpiringexpiredFailed
trace deadline-reached then deadline-extensionexpiringrevalidation-pendingFailed
trace open-action then deadline-reachedpending-at-expirypending-at-expiryPassed
trace deadline-reached then action-successcompletedcompletedPassed
trace deadline-reached then action-failureexpired-action-errorexpired-action-errorPassed
trace action-success then late-expirycompletedcompletedPassed
trace deadline-extension then extension-validatedvalidvalidPassed
trace deadline-extension then extension-rejectedexpiredexpiredPassed
trace extension-validated then deadline-nearexpiringexpiringPassed
trace extension-validated then open-actionaction-pendingaction-pendingPassed
trace extension-rejected then deadline-extensionrevalidation-pendingrevalidation-pendingPassed
trace late-expiry then late-expirycompletedcompletedPassed
domain state regression 1: started{'phase': 'action-pending', 'value': 19}{'phase': 'action-pending', 'value': 19}Passed
domain state regression 2: started{'phase': 'valid', 'value': None}{'phase': 'valid', 'value': None}Passed
domain state regression 3: now{'phase': 'expiring', 'value': 19}{'phase': 'expiring', 'value': 19}Passed
domain state regression 4: completed{'phase': 'completed', 'value': True}{'phase': 'completed', 'value': True}Passed
domain state regression 5: deadline{'phase': 'valid', 'value': 20}{'phase': 'valid', 'value': 20}Passed
domain state regression 6: completed{'phase': 'completed', 'value': True}{'phase': 'completed', 'value': True}Passed
domain state regression 7: started{'phase': 'completed', 'value': 19}{'phase': 'completed', 'value': 19}Passed

SHA-256 / cb211a671777faccbd09c0ad265adb714b37640a2dd8efe7d63037e2d7535d10

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This mechanism has 34 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 2026-09-29T14:42:38.701442+00:00.

Case digest / 6134014988e48ea6fd4ce72d9b415d0ee63c2dfb121c2d9c42d2beaffca47ee3