FA-32671 / Menu interactions / Open access

Left-opening submenu intent tests movement in the wrong direction · case 01

Left-opening submenu intent tests movement in the wrong direction.

Verified by executionVariant 1 · 9 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The pointer-intent-corridor model applies `p['x']>p['previous']` at its direction operation instead of the stipulated transformation.

THE FAILURE

The pointer-intent-corridor model applies `p['x']>p['previous']` at its direction operation instead of the stipulated transformation.

Unsuccessful approach: The attempted repair `p['x']!=p['previous']` still violates the direction oracle.

Case contract

Submenu pointer intent uses signed direction, bounded time and a declared inclusive triangular corridor; unrelated pointer streams cannot renew it.

Why this case matters

Cascading and context menus require coherent command and session state as content changes.

1 / The failure

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json
import math
import unicodedata
N = 1
observations = []
def solve(action, p):
    if action == 'direction':
        return p['x']>p['previous']
    if action == 'expiry':
        return p['now']<p['deadline']
    if action == 'vertical-band':
        return p['top']<=p['y']<=p['bottom']
    if action == 'pointer-owner':
        return p['pointer']==p['owner']
    if action == 'deadline':
        return p['started']+p['budget']
    if action == 'distance':
        return abs(p['edge']-p['x'])<abs(p['edge']-p['previous'])
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('direction contract', solve('direction', {'x':N,'previous':N+2,'side':-1}), True)
check('expiry contract', solve('expiry', {'now':N+10,'deadline':N+10}), False)
check('vertical-band contract', solve('vertical-band', {'top':N+1,'bottom':N+4,'y':N}), False)
check('pointer-owner contract', solve('pointer-owner', {'pointer':N+1,'owner':N}), False)
check('deadline contract', solve('deadline', {'started':N,'now':N+5,'budget':10}), N+10)
check('distance contract', solve('distance', {'edge':N+10,'x':N,'previous':N+2}), False)
check('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})
check('away from left submenu',solve('direction',{'x':N+2,'previous':N,'side':-1}),False)
check('below submenu corridor',solve('vertical-band',{'top':N,'bottom':N+3,'y':N+4}),False)
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
direction contract	`False`	`True`	Failed
expiry contract	`False`	`False`	Passed
vertical-band contract	`False`	`False`	Passed
pointer-owner contract	`False`	`False`	Passed
deadline contract	`11`	`11`	Passed
distance contract	`False`	`False`	Passed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed
away from left submenu	`True`	`False`	Failed
below submenu corridor	`False`	`False`	Passed

SHA-256 / 67dce9c50a592cdfcb606c86fe3addbccb4f5787b90577efc1519ccb4110aa78

2 / The unsuccessful fix

Exit 1

"""Failure Map reference implementation. Python standard library only."""
import json
import math
import unicodedata
N = 1
observations = []
def solve(action, p):
    if action == 'direction':
        return p['x']!=p['previous']
    if action == 'expiry':
        return p['now']<p['deadline']
    if action == 'vertical-band':
        return p['top']<=p['y']<=p['bottom']
    if action == 'pointer-owner':
        return p['pointer']==p['owner']
    if action == 'deadline':
        return p['started']+p['budget']
    if action == 'distance':
        return abs(p['edge']-p['x'])<abs(p['edge']-p['previous'])
    return {'error': 'unsupported menu operation'}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('direction contract', solve('direction', {'x':N,'previous':N+2,'side':-1}), True)
check('expiry contract', solve('expiry', {'now':N+10,'deadline':N+10}), False)
check('vertical-band contract', solve('vertical-band', {'top':N+1,'bottom':N+4,'y':N}), False)
check('pointer-owner contract', solve('pointer-owner', {'pointer':N+1,'owner':N}), False)
check('deadline contract', solve('deadline', {'started':N,'now':N+5,'budget':10}), N+10)
check('distance contract', solve('distance', {'edge':N+10,'x':N,'previous':N+2}), False)
check('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})
check('away from left submenu',solve('direction',{'x':N+2,'previous':N,'side':-1}),False)
check('below submenu corridor',solve('vertical-band',{'top':N,'bottom':N+3,'y':N+4}),False)
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
direction contract	`True`	`True`	Passed
expiry contract	`False`	`False`	Passed
vertical-band contract	`False`	`False`	Passed
pointer-owner contract	`False`	`False`	Passed
deadline contract	`11`	`11`	Passed
distance contract	`False`	`False`	Passed
unknown operation	`{'error': 'unsupported menu operation'}`	`{'error': 'unsupported menu operation'}`	Passed
away from left submenu	`True`	`False`	Failed
below submenu corridor	`False`	`False`	Passed

SHA-256 / ce09937a12de2be0679575015644c1ef472ce5c4543795bc32c839f491a5504d

HELD IN THE MEMBER ARCHIVE

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

This mechanism has 9 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.

Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.

Member access is invitation-based. Sign in with your invited account to inspect the repair.

Verification & scope

Offline supplied-valid-payload model; excludes DOM, keyboard, focus, selection, announcements and browser conformance. 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 2026-09-29T14:42:14.764545+00:00.

Case digest / 924d8b21e61956fce34fa00301698cf1443852859524d402734937d9c7c33a1d