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FA-38796 / Tree accessibility / Open access

Hierarchical treegrid interaction mode: Cell entry chooses a read-only column · case 01

Cell entry chooses a read-only column produces the wrong hierarchical widget state in a regression fixture.

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

ROOT CAUSE

The treegrid-mode contract is violated at `if x in d['editable']` by replacing it with `if True`.

THE FAILURE

The treegrid-mode contract is violated at `if x in d['editable']` by replacing it with `if True`.

Unsuccessful approach: The partial repair `if x not in d['editable']` still violates a boundary or preservation case.

Case contract

Row navigation uses one logical active row. Entering cell mode chooses a visible editable cell in the row; unavailable cells are skipped. Escape returns row mode without moving row focus. Column hiding repairs cell identity, and editable descendants never become separate tree rows.

Why this case matters

Offline executable model of a hierarchical accessibility interaction; inputs are bounded and valid as stipulated. No browser, assistive technology, or normative ARIA conformance is claimed.

1 / The failure

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

N = 1
observations = []
def solve(d):
    cols=[x for x in d['columns'] if x not in d['hidden']]
    editable=[x for x in cols if True]
    enter=d['command']=='enter' and bool(editable) and not d['row_disabled']
    escape=d['command']=='escape'
    mode='row' if escape else ('cell' if enter else d['mode'])
    cell=(editable[0] if enter else d['cell']) if mode=='cell' else None
    cell=cell if cell in cols else (cols[0] if mode=='cell' and cols else None)
    active=d['row']+':'+cell if mode=='cell' and cell is not None else d['row']
    rowtab=0 if mode=='row' else -1
    celltabs={x:(0 if mode=='cell' and x==cell else -1) for x in cols}
    expanded=d['expanded']
    return [mode,cell,active,rowtab,celltabs,expanded]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [('enter', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])], 2: [('enter', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1, 'v1': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])], 3: [('enter', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])], 4: [('enter', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])], 5: [('enter', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])]}
for label, data, expected in cases[N]:
    check(label, solve(data), 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 fixtureActualExpectedOutcome
enter['cell', 'x', 'r:x', -1, {'v0': -1, 'x': 0, 'y': -1}, ['r']]['cell', 'x', 'r:x', -1, {'v0': -1, 'x': 0, 'y': -1}, ['r']]Passed
readonly first['cell', 'name', 'r:name', -1, {'name': 0, 'v0': -1, 'x': -1, 'y': -1}, ['r']]['cell', 'x', 'r:x', -1, {'name': -1, 'v0': -1, 'x': 0, 'y': -1}, ['r']]Failed
escape['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]Passed
disabled['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]Passed
no editable['cell', 'x', 'r:x', -1, {'v0': -1, 'x': 0, 'y': -1}, ['r']]['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]Failed
hidden active['cell', 'x', 'r:x', -1, {'v0': -1, 'x': 0, 'y': -1}, ['r']]['cell', 'x', 'r:x', -1, {'v0': -1, 'x': 0, 'y': -1}, ['r']]Passed
visible active['cell', 'y', 'r:y', -1, {'v0': -1, 'x': -1, 'y': 0}, ['r']]['cell', 'y', 'r:y', -1, {'v0': -1, 'x': -1, 'y': 0}, ['r']]Passed
passive row['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]Passed
no columns['row', None, 'r', 0, {}, ['r']]['row', None, 'r', 0, {}, ['r']]Passed

SHA-256 / 54546547d7b415625ed3cf98d4037aed80950b8e28956040a25424fa4b34cff9

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(d):
    cols=[x for x in d['columns'] if x not in d['hidden']]
    editable=[x for x in cols if x not in d['editable']]
    enter=d['command']=='enter' and bool(editable) and not d['row_disabled']
    escape=d['command']=='escape'
    mode='row' if escape else ('cell' if enter else d['mode'])
    cell=(editable[0] if enter else d['cell']) if mode=='cell' else None
    cell=cell if cell in cols else (cols[0] if mode=='cell' and cols else None)
    active=d['row']+':'+cell if mode=='cell' and cell is not None else d['row']
    rowtab=0 if mode=='row' else -1
    celltabs={x:(0 if mode=='cell' and x==cell else -1) for x in cols}
    expanded=d['expanded']
    return [mode,cell,active,rowtab,celltabs,expanded]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [('enter', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])], 2: [('enter', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1, 'v1': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0', 'v1'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])], 3: [('enter', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])], 4: [('enter', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])], 5: [('enter', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('readonly first', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': [], 'editable': ['x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'name': -1, 'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('escape', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'escape', 'row_disabled': False, 'mode': 'cell', 'cell': 'x', 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('disabled', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': True, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('no editable', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': [], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('hidden active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'name', 'row': 'r', 'expanded': ['r']}, ['cell', 'x', 'r:x', -1, {'x': 0, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('visible active', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'cell', 'cell': 'y', 'row': 'r', 'expanded': ['r']}, ['cell', 'y', 'r:y', -1, {'x': -1, 'y': 0, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('passive row', {'columns': ['name', 'x', 'y', 'v0', 'v1', 'v2', 'v3', 'v4'], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'refresh', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {'x': -1, 'y': -1, 'v0': -1, 'v1': -1, 'v2': -1, 'v3': -1, 'v4': -1}, ['r']]), ('no columns', {'columns': [], 'hidden': ['name'], 'editable': ['name', 'x', 'y'], 'command': 'enter', 'row_disabled': False, 'mode': 'row', 'cell': None, 'row': 'r', 'expanded': ['r']}, ['row', None, 'r', 0, {}, ['r']])]}
for label, data, expected in cases[N]:
    check(label, solve(data), 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 fixtureActualExpectedOutcome
enter['cell', 'v0', 'r:v0', -1, {'v0': 0, 'x': -1, 'y': -1}, ['r']]['cell', 'x', 'r:x', -1, {'v0': -1, 'x': 0, 'y': -1}, ['r']]Failed
readonly first['cell', 'name', 'r:name', -1, {'name': 0, 'v0': -1, 'x': -1, 'y': -1}, ['r']]['cell', 'x', 'r:x', -1, {'name': -1, 'v0': -1, 'x': 0, 'y': -1}, ['r']]Failed
escape['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]Passed
disabled['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]Passed
no editable['cell', 'x', 'r:x', -1, {'v0': -1, 'x': 0, 'y': -1}, ['r']]['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]Failed
hidden active['cell', 'x', 'r:x', -1, {'v0': -1, 'x': 0, 'y': -1}, ['r']]['cell', 'x', 'r:x', -1, {'v0': -1, 'x': 0, 'y': -1}, ['r']]Passed
visible active['cell', 'y', 'r:y', -1, {'v0': -1, 'x': -1, 'y': 0}, ['r']]['cell', 'y', 'r:y', -1, {'v0': -1, 'x': -1, 'y': 0}, ['r']]Passed
passive row['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]['row', None, 'r', 0, {'v0': -1, 'x': -1, 'y': -1}, ['r']]Passed
no columns['row', None, 'r', 0, {}, ['r']]['row', None, 'r', 0, {}, ['r']]Passed

SHA-256 / 609b96b8b7deb7cb674bae7207ea0d052ba8c4cc9676d2028a0ce860c11dd0e2

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.

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Verification & scope

Synthetic deterministic hierarchical-widget data contract; not an implementation of a browser accessibility tree. 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 2026-09-29T14:43:15.251135+00:00.

Case digest / 55ade1cd1eafca3d4e76fddad486763a81e7dd62a0f2b26dc28123c431bc03cf