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FA-35086 / Notification interfaces / Open access

Temporary notification mute feedback: cancel-mute-intent from mute-error · case 01

The cancel-mute-intent event leaves a notification in muted instead of audible-channel.

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

ROOT CAUSE

Canceling a failed mute still shows suppression.

VERIFIED REPAIR

Commit the mute-error / cancel-mute-intent transition to audible-channel; preserve the other explicitly stipulated transitions.

Unsuccessful approach: Retrying on cancellation acts against the user's new choice.

Case contract

Temporary notification mute feedback is a bounded visual-notification workflow with mutable policy state {'until': 30, 'now': 10, 'muted': False, 'extension': 60}. Its default transition relation is {('audible-channel', 'mute-for-session'): 'mute-pending', ('mute-pending', 'mute-confirmed'): 'muted', ('mute-pending', 'mute-rejected'): 'mute-error', ('muted', 'mute-window-ended'): 'unmute-pending', ('unmute-pending', 'unmute-confirmed'): 'audible-channel', ('unmute-pending', 'unmute-rejected'): 'unmute-error', ('muted', 'extend-mute'): 'extend-pending', ('extend-pending', 'extension-confirmed'): 'muted-extended', ('muted-extended', 'old-window-ended'): 'muted-extended', ('mute-error', 'cancel-mute-intent'): 'audible-channel'}; 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 = {('audible-channel', 'mute-for-session'): 'mute-pending', ('mute-pending', 'mute-confirmed'): 'muted', ('mute-pending', 'mute-rejected'): 'mute-error', ('muted', 'mute-window-ended'): 'unmute-pending', ('unmute-pending', 'unmute-confirmed'): 'audible-channel', ('unmute-pending', 'unmute-rejected'): 'unmute-error', ('muted', 'extend-mute'): 'extend-pending', ('extend-pending', 'extension-confirmed'): 'muted-extended', ('muted-extended', 'old-window-ended'): 'muted-extended', ('mute-error', 'cancel-mute-intent'): 'muted'}
    data = json.loads(json.dumps({'until': 30, 'now': 10, 'muted': False, 'extension': 60})) if payload is None else {**json.loads(json.dumps({'until': 30, 'now': 10, 'muted': False, 'extension': 60})), **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 == 'mute-window-ended' and data['now'] < data['until'] and 'now' in arg: event = 'unknown-event'
            if event == 'extend-mute': data['extension'] = max(data['until'],arg.get('until',data['extension']))
            if event == 'extension-confirmed': data['until'] = data['extension']
            state = table.get((state, event), state)
            if state in ('muted','muted-extended'): data['muted'] = True
            if state == 'audible-channel': data['muted'] = False
    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('audible-channel / mute-for-session', solve('audible-channel', [('mute-for-session', N)], N), 'mute-pending')
check('mute-pending / mute-confirmed', solve('mute-pending', [('mute-confirmed', N)], N), 'muted')
check('mute-pending / mute-rejected', solve('mute-pending', [('mute-rejected', N)], N), 'mute-error')
check('muted / mute-window-ended', solve('muted', [('mute-window-ended', N)], N), 'unmute-pending')
check('unmute-pending / unmute-confirmed', solve('unmute-pending', [('unmute-confirmed', N)], N), 'audible-channel')
check('unmute-pending / unmute-rejected', solve('unmute-pending', [('unmute-rejected', N)], N), 'unmute-error')
check('muted / extend-mute', solve('muted', [('extend-mute', N)], N), 'extend-pending')
check('extend-pending / extension-confirmed', solve('extend-pending', [('extension-confirmed', N)], N), 'muted-extended')
check('muted-extended / old-window-ended', solve('muted-extended', [('old-window-ended', N)], N), 'muted-extended')
check('mute-error / cancel-mute-intent', solve('mute-error', [('cancel-mute-intent', N)], N), 'audible-channel')
check('older notification incarnation', solve('audible-channel', [('mute-for-session', N - 1)], N), 'audible-channel')
check('future notification incarnation', solve('audible-channel', [('mute-for-session', N + 1)], N), 'audible-channel')
check('unknown event is inert', solve('audible-channel', [('unknown-event', N)], N), 'audible-channel')
check('empty delivery batch', solve('audible-channel', [], N), 'audible-channel')
check('N stale deliveries before current delivery', solve('audible-channel', [('mute-for-session', N - 1)] * N + [('mute-for-session', N)], N), 'mute-pending')
check('trace mute-for-session then mute-confirmed', solve('audible-channel', [('mute-for-session', N), ('mute-confirmed', N)], N), 'muted')
check('trace mute-for-session then mute-rejected', solve('audible-channel', [('mute-for-session', N), ('mute-rejected', N)], N), 'mute-error')
check('trace mute-confirmed then mute-window-ended', solve('mute-pending', [('mute-confirmed', N), ('mute-window-ended', N)], N), 'unmute-pending')
check('trace mute-confirmed then extend-mute', solve('mute-pending', [('mute-confirmed', N), ('extend-mute', N)], N), 'extend-pending')
check('trace mute-rejected then cancel-mute-intent', solve('mute-pending', [('mute-rejected', N), ('cancel-mute-intent', N)], N), 'audible-channel')
check('trace mute-window-ended then unmute-confirmed', solve('muted', [('mute-window-ended', N), ('unmute-confirmed', N)], N), 'audible-channel')
check('trace mute-window-ended then unmute-rejected', solve('muted', [('mute-window-ended', N), ('unmute-rejected', N)], N), 'unmute-error')
check('trace unmute-confirmed then mute-for-session', solve('unmute-pending', [('unmute-confirmed', N), ('mute-for-session', N)], N), 'mute-pending')
check('trace extend-mute then extension-confirmed', solve('muted', [('extend-mute', N), ('extension-confirmed', N)], N), 'muted-extended')
check('trace extension-confirmed then old-window-ended', solve('extend-pending', [('extension-confirmed', N), ('old-window-ended', N)], N), 'muted-extended')
check('trace old-window-ended then old-window-ended', solve('muted-extended', [('old-window-ended', N), ('old-window-ended', N)], N), 'muted-extended')
check('trace cancel-mute-intent then mute-for-session', solve('mute-error', [('cancel-mute-intent', N), ('mute-for-session', N)], N), 'mute-pending')
check('domain state regression 1: muted', solve('muted', [('mute-window-ended', N, {'now': 29})], N, {'muted': True}, 'muted'), {'phase': 'muted', 'value': True})
check('domain state regression 2: muted', solve('muted', [('mute-window-ended', N, {'now': 30})], N, {'muted': True}, 'muted'), {'phase': 'unmute-pending', 'value': True})
check('domain state regression 3: extension', solve('muted', [('extend-mute', N, {'until': 20})], N, {}, 'extension'), {'phase': 'extend-pending', 'value': 30})
check('domain state regression 4: until', solve('extend-pending', [('extension-confirmed', N, {})], N, {}, 'until'), {'phase': 'muted-extended', 'value': 60})
check('domain state regression 5: muted', solve('muted-extended', [('old-window-ended', N, {})], N, {'until': 60, 'muted': True}, 'muted'), {'phase': 'muted-extended', 'value': True})
check('domain state regression 6: muted', solve('unmute-pending', [('unmute-confirmed', N, {})], N, {'muted': True}, 'muted'), {'phase': 'audible-channel', 'value': False})
check('domain state regression 7: until', solve('muted', [('extend-mute', N, {'until': 80}), ('extension-confirmed', N, {}), ('old-window-ended', N, {})], N, {'muted': True}, 'until'), {'phase': 'muted-extended', 'value': 80})
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
audible-channel / mute-for-sessionmute-pendingmute-pendingPassed
mute-pending / mute-confirmedmutedmutedPassed
mute-pending / mute-rejectedmute-errormute-errorPassed
muted / mute-window-endedunmute-pendingunmute-pendingPassed
unmute-pending / unmute-confirmedaudible-channelaudible-channelPassed
unmute-pending / unmute-rejectedunmute-errorunmute-errorPassed
muted / extend-muteextend-pendingextend-pendingPassed
extend-pending / extension-confirmedmuted-extendedmuted-extendedPassed
muted-extended / old-window-endedmuted-extendedmuted-extendedPassed
mute-error / cancel-mute-intentmutedaudible-channelFailed
older notification incarnationaudible-channelaudible-channelPassed
future notification incarnationaudible-channelaudible-channelPassed
unknown event is inertaudible-channelaudible-channelPassed
empty delivery batchaudible-channelaudible-channelPassed
N stale deliveries before current deliverymute-pendingmute-pendingPassed
trace mute-for-session then mute-confirmedmutedmutedPassed
trace mute-for-session then mute-rejectedmute-errormute-errorPassed
trace mute-confirmed then mute-window-endedunmute-pendingunmute-pendingPassed
trace mute-confirmed then extend-muteextend-pendingextend-pendingPassed
trace mute-rejected then cancel-mute-intentmutedaudible-channelFailed
trace mute-window-ended then unmute-confirmedaudible-channelaudible-channelPassed
trace mute-window-ended then unmute-rejectedunmute-errorunmute-errorPassed
trace unmute-confirmed then mute-for-sessionmute-pendingmute-pendingPassed
trace extend-mute then extension-confirmedmuted-extendedmuted-extendedPassed
trace extension-confirmed then old-window-endedmuted-extendedmuted-extendedPassed
trace old-window-ended then old-window-endedmuted-extendedmuted-extendedPassed
trace cancel-mute-intent then mute-for-sessionmutedmute-pendingFailed
domain state regression 1: muted{'phase': 'muted', 'value': True}{'phase': 'muted', 'value': True}Passed
domain state regression 2: muted{'phase': 'unmute-pending', 'value': True}{'phase': 'unmute-pending', 'value': True}Passed
domain state regression 3: extension{'phase': 'extend-pending', 'value': 30}{'phase': 'extend-pending', 'value': 30}Passed
domain state regression 4: until{'phase': 'muted-extended', 'value': 60}{'phase': 'muted-extended', 'value': 60}Passed
domain state regression 5: muted{'phase': 'muted-extended', 'value': True}{'phase': 'muted-extended', 'value': True}Passed
domain state regression 6: muted{'phase': 'audible-channel', 'value': False}{'phase': 'audible-channel', 'value': False}Passed
domain state regression 7: until{'phase': 'muted-extended', 'value': 80}{'phase': 'muted-extended', 'value': 80}Passed

SHA-256 / 92e1d619366a38c05ce1c9f2fc5dd0531adb4ec6965d6bcc46feed81d12e7978

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 = {('audible-channel', 'mute-for-session'): 'mute-pending', ('mute-pending', 'mute-confirmed'): 'muted', ('mute-pending', 'mute-rejected'): 'mute-error', ('muted', 'mute-window-ended'): 'unmute-pending', ('unmute-pending', 'unmute-confirmed'): 'audible-channel', ('unmute-pending', 'unmute-rejected'): 'unmute-error', ('muted', 'extend-mute'): 'extend-pending', ('extend-pending', 'extension-confirmed'): 'muted-extended', ('muted-extended', 'old-window-ended'): 'muted-extended', ('mute-error', 'cancel-mute-intent'): 'mute-pending'}
    data = json.loads(json.dumps({'until': 30, 'now': 10, 'muted': False, 'extension': 60})) if payload is None else {**json.loads(json.dumps({'until': 30, 'now': 10, 'muted': False, 'extension': 60})), **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 == 'mute-window-ended' and data['now'] < data['until'] and 'now' in arg: event = 'unknown-event'
            if event == 'extend-mute': data['extension'] = max(data['until'],arg.get('until',data['extension']))
            if event == 'extension-confirmed': data['until'] = data['extension']
            state = table.get((state, event), state)
            if state in ('muted','muted-extended'): data['muted'] = True
            if state == 'audible-channel': data['muted'] = False
    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('audible-channel / mute-for-session', solve('audible-channel', [('mute-for-session', N)], N), 'mute-pending')
check('mute-pending / mute-confirmed', solve('mute-pending', [('mute-confirmed', N)], N), 'muted')
check('mute-pending / mute-rejected', solve('mute-pending', [('mute-rejected', N)], N), 'mute-error')
check('muted / mute-window-ended', solve('muted', [('mute-window-ended', N)], N), 'unmute-pending')
check('unmute-pending / unmute-confirmed', solve('unmute-pending', [('unmute-confirmed', N)], N), 'audible-channel')
check('unmute-pending / unmute-rejected', solve('unmute-pending', [('unmute-rejected', N)], N), 'unmute-error')
check('muted / extend-mute', solve('muted', [('extend-mute', N)], N), 'extend-pending')
check('extend-pending / extension-confirmed', solve('extend-pending', [('extension-confirmed', N)], N), 'muted-extended')
check('muted-extended / old-window-ended', solve('muted-extended', [('old-window-ended', N)], N), 'muted-extended')
check('mute-error / cancel-mute-intent', solve('mute-error', [('cancel-mute-intent', N)], N), 'audible-channel')
check('older notification incarnation', solve('audible-channel', [('mute-for-session', N - 1)], N), 'audible-channel')
check('future notification incarnation', solve('audible-channel', [('mute-for-session', N + 1)], N), 'audible-channel')
check('unknown event is inert', solve('audible-channel', [('unknown-event', N)], N), 'audible-channel')
check('empty delivery batch', solve('audible-channel', [], N), 'audible-channel')
check('N stale deliveries before current delivery', solve('audible-channel', [('mute-for-session', N - 1)] * N + [('mute-for-session', N)], N), 'mute-pending')
check('trace mute-for-session then mute-confirmed', solve('audible-channel', [('mute-for-session', N), ('mute-confirmed', N)], N), 'muted')
check('trace mute-for-session then mute-rejected', solve('audible-channel', [('mute-for-session', N), ('mute-rejected', N)], N), 'mute-error')
check('trace mute-confirmed then mute-window-ended', solve('mute-pending', [('mute-confirmed', N), ('mute-window-ended', N)], N), 'unmute-pending')
check('trace mute-confirmed then extend-mute', solve('mute-pending', [('mute-confirmed', N), ('extend-mute', N)], N), 'extend-pending')
check('trace mute-rejected then cancel-mute-intent', solve('mute-pending', [('mute-rejected', N), ('cancel-mute-intent', N)], N), 'audible-channel')
check('trace mute-window-ended then unmute-confirmed', solve('muted', [('mute-window-ended', N), ('unmute-confirmed', N)], N), 'audible-channel')
check('trace mute-window-ended then unmute-rejected', solve('muted', [('mute-window-ended', N), ('unmute-rejected', N)], N), 'unmute-error')
check('trace unmute-confirmed then mute-for-session', solve('unmute-pending', [('unmute-confirmed', N), ('mute-for-session', N)], N), 'mute-pending')
check('trace extend-mute then extension-confirmed', solve('muted', [('extend-mute', N), ('extension-confirmed', N)], N), 'muted-extended')
check('trace extension-confirmed then old-window-ended', solve('extend-pending', [('extension-confirmed', N), ('old-window-ended', N)], N), 'muted-extended')
check('trace old-window-ended then old-window-ended', solve('muted-extended', [('old-window-ended', N), ('old-window-ended', N)], N), 'muted-extended')
check('trace cancel-mute-intent then mute-for-session', solve('mute-error', [('cancel-mute-intent', N), ('mute-for-session', N)], N), 'mute-pending')
check('domain state regression 1: muted', solve('muted', [('mute-window-ended', N, {'now': 29})], N, {'muted': True}, 'muted'), {'phase': 'muted', 'value': True})
check('domain state regression 2: muted', solve('muted', [('mute-window-ended', N, {'now': 30})], N, {'muted': True}, 'muted'), {'phase': 'unmute-pending', 'value': True})
check('domain state regression 3: extension', solve('muted', [('extend-mute', N, {'until': 20})], N, {}, 'extension'), {'phase': 'extend-pending', 'value': 30})
check('domain state regression 4: until', solve('extend-pending', [('extension-confirmed', N, {})], N, {}, 'until'), {'phase': 'muted-extended', 'value': 60})
check('domain state regression 5: muted', solve('muted-extended', [('old-window-ended', N, {})], N, {'until': 60, 'muted': True}, 'muted'), {'phase': 'muted-extended', 'value': True})
check('domain state regression 6: muted', solve('unmute-pending', [('unmute-confirmed', N, {})], N, {'muted': True}, 'muted'), {'phase': 'audible-channel', 'value': False})
check('domain state regression 7: until', solve('muted', [('extend-mute', N, {'until': 80}), ('extension-confirmed', N, {}), ('old-window-ended', N, {})], N, {'muted': True}, 'until'), {'phase': 'muted-extended', 'value': 80})
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
audible-channel / mute-for-sessionmute-pendingmute-pendingPassed
mute-pending / mute-confirmedmutedmutedPassed
mute-pending / mute-rejectedmute-errormute-errorPassed
muted / mute-window-endedunmute-pendingunmute-pendingPassed
unmute-pending / unmute-confirmedaudible-channelaudible-channelPassed
unmute-pending / unmute-rejectedunmute-errorunmute-errorPassed
muted / extend-muteextend-pendingextend-pendingPassed
extend-pending / extension-confirmedmuted-extendedmuted-extendedPassed
muted-extended / old-window-endedmuted-extendedmuted-extendedPassed
mute-error / cancel-mute-intentmute-pendingaudible-channelFailed
older notification incarnationaudible-channelaudible-channelPassed
future notification incarnationaudible-channelaudible-channelPassed
unknown event is inertaudible-channelaudible-channelPassed
empty delivery batchaudible-channelaudible-channelPassed
N stale deliveries before current deliverymute-pendingmute-pendingPassed
trace mute-for-session then mute-confirmedmutedmutedPassed
trace mute-for-session then mute-rejectedmute-errormute-errorPassed
trace mute-confirmed then mute-window-endedunmute-pendingunmute-pendingPassed
trace mute-confirmed then extend-muteextend-pendingextend-pendingPassed
trace mute-rejected then cancel-mute-intentmute-pendingaudible-channelFailed
trace mute-window-ended then unmute-confirmedaudible-channelaudible-channelPassed
trace mute-window-ended then unmute-rejectedunmute-errorunmute-errorPassed
trace unmute-confirmed then mute-for-sessionmute-pendingmute-pendingPassed
trace extend-mute then extension-confirmedmuted-extendedmuted-extendedPassed
trace extension-confirmed then old-window-endedmuted-extendedmuted-extendedPassed
trace old-window-ended then old-window-endedmuted-extendedmuted-extendedPassed
trace cancel-mute-intent then mute-for-sessionmute-pendingmute-pendingPassed
domain state regression 1: muted{'phase': 'muted', 'value': True}{'phase': 'muted', 'value': True}Passed
domain state regression 2: muted{'phase': 'unmute-pending', 'value': True}{'phase': 'unmute-pending', 'value': True}Passed
domain state regression 3: extension{'phase': 'extend-pending', 'value': 30}{'phase': 'extend-pending', 'value': 30}Passed
domain state regression 4: until{'phase': 'muted-extended', 'value': 60}{'phase': 'muted-extended', 'value': 60}Passed
domain state regression 5: muted{'phase': 'muted-extended', 'value': True}{'phase': 'muted-extended', 'value': True}Passed
domain state regression 6: muted{'phase': 'audible-channel', 'value': False}{'phase': 'audible-channel', 'value': False}Passed
domain state regression 7: until{'phase': 'muted-extended', 'value': 80}{'phase': 'muted-extended', 'value': 80}Passed

SHA-256 / fcde8ccb6718f724ac64ff0faa188968c5e0e80d9c32bbb31aa7345231dec23a

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(initial, events, generation, payload=None, observe=None):
    table = {('audible-channel', 'mute-for-session'): 'mute-pending', ('mute-pending', 'mute-confirmed'): 'muted', ('mute-pending', 'mute-rejected'): 'mute-error', ('muted', 'mute-window-ended'): 'unmute-pending', ('unmute-pending', 'unmute-confirmed'): 'audible-channel', ('unmute-pending', 'unmute-rejected'): 'unmute-error', ('muted', 'extend-mute'): 'extend-pending', ('extend-pending', 'extension-confirmed'): 'muted-extended', ('muted-extended', 'old-window-ended'): 'muted-extended', ('mute-error', 'cancel-mute-intent'): 'audible-channel'}
    data = json.loads(json.dumps({'until': 30, 'now': 10, 'muted': False, 'extension': 60})) if payload is None else {**json.loads(json.dumps({'until': 30, 'now': 10, 'muted': False, 'extension': 60})), **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 == 'mute-window-ended' and data['now'] < data['until'] and 'now' in arg: event = 'unknown-event'
            if event == 'extend-mute': data['extension'] = max(data['until'],arg.get('until',data['extension']))
            if event == 'extension-confirmed': data['until'] = data['extension']
            state = table.get((state, event), state)
            if state in ('muted','muted-extended'): data['muted'] = True
            if state == 'audible-channel': data['muted'] = False
    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('audible-channel / mute-for-session', solve('audible-channel', [('mute-for-session', N)], N), 'mute-pending')
check('mute-pending / mute-confirmed', solve('mute-pending', [('mute-confirmed', N)], N), 'muted')
check('mute-pending / mute-rejected', solve('mute-pending', [('mute-rejected', N)], N), 'mute-error')
check('muted / mute-window-ended', solve('muted', [('mute-window-ended', N)], N), 'unmute-pending')
check('unmute-pending / unmute-confirmed', solve('unmute-pending', [('unmute-confirmed', N)], N), 'audible-channel')
check('unmute-pending / unmute-rejected', solve('unmute-pending', [('unmute-rejected', N)], N), 'unmute-error')
check('muted / extend-mute', solve('muted', [('extend-mute', N)], N), 'extend-pending')
check('extend-pending / extension-confirmed', solve('extend-pending', [('extension-confirmed', N)], N), 'muted-extended')
check('muted-extended / old-window-ended', solve('muted-extended', [('old-window-ended', N)], N), 'muted-extended')
check('mute-error / cancel-mute-intent', solve('mute-error', [('cancel-mute-intent', N)], N), 'audible-channel')
check('older notification incarnation', solve('audible-channel', [('mute-for-session', N - 1)], N), 'audible-channel')
check('future notification incarnation', solve('audible-channel', [('mute-for-session', N + 1)], N), 'audible-channel')
check('unknown event is inert', solve('audible-channel', [('unknown-event', N)], N), 'audible-channel')
check('empty delivery batch', solve('audible-channel', [], N), 'audible-channel')
check('N stale deliveries before current delivery', solve('audible-channel', [('mute-for-session', N - 1)] * N + [('mute-for-session', N)], N), 'mute-pending')
check('trace mute-for-session then mute-confirmed', solve('audible-channel', [('mute-for-session', N), ('mute-confirmed', N)], N), 'muted')
check('trace mute-for-session then mute-rejected', solve('audible-channel', [('mute-for-session', N), ('mute-rejected', N)], N), 'mute-error')
check('trace mute-confirmed then mute-window-ended', solve('mute-pending', [('mute-confirmed', N), ('mute-window-ended', N)], N), 'unmute-pending')
check('trace mute-confirmed then extend-mute', solve('mute-pending', [('mute-confirmed', N), ('extend-mute', N)], N), 'extend-pending')
check('trace mute-rejected then cancel-mute-intent', solve('mute-pending', [('mute-rejected', N), ('cancel-mute-intent', N)], N), 'audible-channel')
check('trace mute-window-ended then unmute-confirmed', solve('muted', [('mute-window-ended', N), ('unmute-confirmed', N)], N), 'audible-channel')
check('trace mute-window-ended then unmute-rejected', solve('muted', [('mute-window-ended', N), ('unmute-rejected', N)], N), 'unmute-error')
check('trace unmute-confirmed then mute-for-session', solve('unmute-pending', [('unmute-confirmed', N), ('mute-for-session', N)], N), 'mute-pending')
check('trace extend-mute then extension-confirmed', solve('muted', [('extend-mute', N), ('extension-confirmed', N)], N), 'muted-extended')
check('trace extension-confirmed then old-window-ended', solve('extend-pending', [('extension-confirmed', N), ('old-window-ended', N)], N), 'muted-extended')
check('trace old-window-ended then old-window-ended', solve('muted-extended', [('old-window-ended', N), ('old-window-ended', N)], N), 'muted-extended')
check('trace cancel-mute-intent then mute-for-session', solve('mute-error', [('cancel-mute-intent', N), ('mute-for-session', N)], N), 'mute-pending')
check('domain state regression 1: muted', solve('muted', [('mute-window-ended', N, {'now': 29})], N, {'muted': True}, 'muted'), {'phase': 'muted', 'value': True})
check('domain state regression 2: muted', solve('muted', [('mute-window-ended', N, {'now': 30})], N, {'muted': True}, 'muted'), {'phase': 'unmute-pending', 'value': True})
check('domain state regression 3: extension', solve('muted', [('extend-mute', N, {'until': 20})], N, {}, 'extension'), {'phase': 'extend-pending', 'value': 30})
check('domain state regression 4: until', solve('extend-pending', [('extension-confirmed', N, {})], N, {}, 'until'), {'phase': 'muted-extended', 'value': 60})
check('domain state regression 5: muted', solve('muted-extended', [('old-window-ended', N, {})], N, {'until': 60, 'muted': True}, 'muted'), {'phase': 'muted-extended', 'value': True})
check('domain state regression 6: muted', solve('unmute-pending', [('unmute-confirmed', N, {})], N, {'muted': True}, 'muted'), {'phase': 'audible-channel', 'value': False})
check('domain state regression 7: until', solve('muted', [('extend-mute', N, {'until': 80}), ('extension-confirmed', N, {}), ('old-window-ended', N, {})], N, {'muted': True}, 'until'), {'phase': 'muted-extended', 'value': 80})
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
audible-channel / mute-for-sessionmute-pendingmute-pendingPassed
mute-pending / mute-confirmedmutedmutedPassed
mute-pending / mute-rejectedmute-errormute-errorPassed
muted / mute-window-endedunmute-pendingunmute-pendingPassed
unmute-pending / unmute-confirmedaudible-channelaudible-channelPassed
unmute-pending / unmute-rejectedunmute-errorunmute-errorPassed
muted / extend-muteextend-pendingextend-pendingPassed
extend-pending / extension-confirmedmuted-extendedmuted-extendedPassed
muted-extended / old-window-endedmuted-extendedmuted-extendedPassed
mute-error / cancel-mute-intentaudible-channelaudible-channelPassed
older notification incarnationaudible-channelaudible-channelPassed
future notification incarnationaudible-channelaudible-channelPassed
unknown event is inertaudible-channelaudible-channelPassed
empty delivery batchaudible-channelaudible-channelPassed
N stale deliveries before current deliverymute-pendingmute-pendingPassed
trace mute-for-session then mute-confirmedmutedmutedPassed
trace mute-for-session then mute-rejectedmute-errormute-errorPassed
trace mute-confirmed then mute-window-endedunmute-pendingunmute-pendingPassed
trace mute-confirmed then extend-muteextend-pendingextend-pendingPassed
trace mute-rejected then cancel-mute-intentaudible-channelaudible-channelPassed
trace mute-window-ended then unmute-confirmedaudible-channelaudible-channelPassed
trace mute-window-ended then unmute-rejectedunmute-errorunmute-errorPassed
trace unmute-confirmed then mute-for-sessionmute-pendingmute-pendingPassed
trace extend-mute then extension-confirmedmuted-extendedmuted-extendedPassed
trace extension-confirmed then old-window-endedmuted-extendedmuted-extendedPassed
trace old-window-ended then old-window-endedmuted-extendedmuted-extendedPassed
trace cancel-mute-intent then mute-for-sessionmute-pendingmute-pendingPassed
domain state regression 1: muted{'phase': 'muted', 'value': True}{'phase': 'muted', 'value': True}Passed
domain state regression 2: muted{'phase': 'unmute-pending', 'value': True}{'phase': 'unmute-pending', 'value': True}Passed
domain state regression 3: extension{'phase': 'extend-pending', 'value': 30}{'phase': 'extend-pending', 'value': 30}Passed
domain state regression 4: until{'phase': 'muted-extended', 'value': 60}{'phase': 'muted-extended', 'value': 60}Passed
domain state regression 5: muted{'phase': 'muted-extended', 'value': True}{'phase': 'muted-extended', 'value': True}Passed
domain state regression 6: muted{'phase': 'audible-channel', 'value': False}{'phase': 'audible-channel', 'value': False}Passed
domain state regression 7: until{'phase': 'muted-extended', 'value': 80}{'phase': 'muted-extended', 'value': 80}Passed

SHA-256 / 8e8582c0431e4bb645bc9a78d556d84835bfbb41af9840af43a04c0f82f77f96

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 2026-09-29T14:42:38.163825+00:00.

Case digest / b104d64746edba72408b4cd2b7bbd8cf1b29af607e9a77f6dffa49598ad733c7