FA-36671 / Tab interfaces / Open access

Tab audible status: capture indicator independence · case 01

The tab workspace reports an incorrect capture indicator independence.

Verified by executionVariant 1 · 6 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The capture indicator independence decision uses [] instead of x['capture'].

VERIFIED REPAIR

Use the stipulated workspace rule: x['capture'].

Unsuccessful approach: The partial repair [t for t in x['capture'] if t in x['audible']] still violates a workspace boundary or normal case.

Case contract

Tab audio indicators distinguish currently audible, explicitly muted, and media-capture states. Muting changes only the selected tab policy and does not stop capture. The separate Stop Capture command removes only its target from the capture set.

Why this case matters

Offline tab/panel workspace behavior; no browser or desktop framework is emulated.

1 / The failure

Exit 1

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

N = 1
observations = []
def solve(x):
    r0 = [t for t in x['tabs'] if t in x['audible'] and t not in x['muted']]
    r1 = x['muted']
    r2 = []
    r3 = [t for t in x['muted'] if t!=x['target']] if x['target'] in x['muted'] else x['muted']+[x['target']]
    r4 = [t for t in x['capture'] if t!=x['target']]
    r5 = 'Unmute tab' if x['target'] in x['muted'] else 'Mute tab'
    return [r0,r1,r2,r3,r4,r5]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 2: [({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 3: [({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 4: [({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 5: [({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])]}
for i, (inputs, expected) in enumerate(fixtures[N]):
    check("workspace regression "+str(i), solve(inputs), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
workspace regression 0	`[['a'], ['b'], [], ['b', 'a'], ['c'], 'Mute tab']`	`[['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']`	Failed
workspace regression 1	`[['a'], ['b'], [], [], ['c'], 'Unmute tab']`	`[['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']`	Failed
workspace regression 2	`[[], ['b'], [], ['b', 'a'], ['c'], 'Mute tab']`	`[[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']`	Failed
workspace regression 3	`[['a'], ['b'], [], ['b', 'a'], ['c'], 'Mute tab']`	`[['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']`	Failed
workspace regression 4	`[['a', 'b'], [], [], ['a'], ['c'], 'Mute tab']`	`[['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']`	Failed
workspace regression 5	`[['a'], ['b'], [], ['b', 'c'], [], 'Mute tab']`	`[['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab']`	Failed

SHA-256 / b881cdf65dd3aad2e38f4313ab65fcc9912fba74c5ff83fd22aae4fc6ef6ec6a

2 / The unsuccessful fix

Exit 1

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

N = 1
observations = []
def solve(x):
    r0 = [t for t in x['tabs'] if t in x['audible'] and t not in x['muted']]
    r1 = x['muted']
    r2 = [t for t in x['capture'] if t in x['audible']]
    r3 = [t for t in x['muted'] if t!=x['target']] if x['target'] in x['muted'] else x['muted']+[x['target']]
    r4 = [t for t in x['capture'] if t!=x['target']]
    r5 = 'Unmute tab' if x['target'] in x['muted'] else 'Mute tab'
    return [r0,r1,r2,r3,r4,r5]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 2: [({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 3: [({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 4: [({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 5: [({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])]}
for i, (inputs, expected) in enumerate(fixtures[N]):
    check("workspace regression "+str(i), solve(inputs), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
workspace regression 0	`[['a'], ['b'], [], ['b', 'a'], ['c'], 'Mute tab']`	`[['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']`	Failed
workspace regression 1	`[['a'], ['b'], [], [], ['c'], 'Unmute tab']`	`[['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']`	Failed
workspace regression 2	`[[], ['b'], [], ['b', 'a'], ['c'], 'Mute tab']`	`[[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']`	Failed
workspace regression 3	`[['a'], ['b'], ['a'], ['b', 'a'], ['c'], 'Mute tab']`	`[['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']`	Failed
workspace regression 4	`[['a', 'b'], [], [], ['a'], ['c'], 'Mute tab']`	`[['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']`	Failed
workspace regression 5	`[['a'], ['b'], [], ['b', 'c'], [], 'Mute tab']`	`[['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab']`	Failed

SHA-256 / 05df92fb510bf003a1d68d908f4e9a3126de150d15c3172c648c88441a75e2ea

3 / The verified repair

Exit 0

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

N = 1
observations = []
def solve(x):
    r0 = [t for t in x['tabs'] if t in x['audible'] and t not in x['muted']]
    r1 = x['muted']
    r2 = x['capture']
    r3 = [t for t in x['muted'] if t!=x['target']] if x['target'] in x['muted'] else x['muted']+[x['target']]
    r4 = [t for t in x['capture'] if t!=x['target']]
    r5 = 'Unmute tab' if x['target'] in x['muted'] else 'Mute tab'
    return [r0,r1,r2,r3,r4,r5]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 2: [({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 3: [({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 4: [({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])], 5: [({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'b'}, [['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': [], 'muted': ['b'], 'capture': ['c'], 'target': 'a'}, [[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['a', 'c'], 'target': 'a'}, [['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': [], 'capture': ['c'], 'target': 'a'}, [['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']), ({'tabs': ['a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'audible': ['a', 'b'], 'muted': ['b'], 'capture': ['c'], 'target': 'c'}, [['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab'])]}
for i, (inputs, expected) in enumerate(fixtures[N]):
    check("workspace regression "+str(i), solve(inputs), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)

Boundary fixture	Actual	Expected	Outcome
workspace regression 0	`[['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']`	`[['a'], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']`	Passed
workspace regression 1	`[['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']`	`[['a'], ['b'], ['c'], [], ['c'], 'Unmute tab']`	Passed
workspace regression 2	`[[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']`	`[[], ['b'], ['c'], ['b', 'a'], ['c'], 'Mute tab']`	Passed
workspace regression 3	`[['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']`	`[['a'], ['b'], ['a', 'c'], ['b', 'a'], ['c'], 'Mute tab']`	Passed
workspace regression 4	`[['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']`	`[['a', 'b'], [], ['c'], ['a'], ['c'], 'Mute tab']`	Passed
workspace regression 5	`[['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab']`	`[['a'], ['b'], ['c'], ['b', 'c'], [], 'Mute tab']`	Passed

SHA-256 / 011d7154db04dd756298295bd01077c4e475c67481bfd1fa2f3dfea18e62c08b

Verification & scope

Finite stipulated workspace snapshots only. Independent result fields describe observable obligations, not a full UI runtime. 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 2026-09-29T14:42:53.584101+00:00.

Case digest / a0b65fb804f99e6e1dc4135f92035b7431abc5979273d6eef127f30e3bb6be74