LAKA-WCAG-DRAG-ALTERNATIVE

{
  "id": "LAKA-WCAG-DRAG-ALTERNATIVE",
  "version": "1.0.0",
  "authority": "wcag_requirement",
  "source_refs": [
    "SC-2.5.7"
  ],
  "wcag_refs": [
    {
      "criterion_id": "2.5.7",
      "level": "AA"
    }
  ],
  "covers_full_criteria": false,
  "object": {
    "type": "reorderable list",
    "scope": "A concrete authorized component instance; bind before execution.",
    "states": [
      "populated",
      "moving",
      "reordered"
    ]
  },
  "applicability": {
    "predicate": "function.uses_dragging"
  },
  "require": {
    "any": [
      {
        "predicate": "pointer.same_function_without_dragging"
      },
      {
        "predicate": "drag.essential_exception_verified"
      },
      {
        "predicate": "drag.unmodified_browser_exception_verified"
      }
    ]
  },
  "exceptions": [
    {
      "clause": "2.5.7 essential dragging or unmodified user-agent behavior",
      "instance_scope": "Only the specific function for which evidence is recorded.",
      "proof_required": true,
      "review_required": true
    }
  ],
  "implementation": "Choose a simple-pointer move control and separately check keyboard operation.",
  "laka": {
    "change_level": "Major Change",
    "internal_variables": {
      "Object": "reorderable list in the declared test scope.",
      "Conditions": "Use the listed states with a recorded role, fixture and environment.",
      "Actions": "Execute the named task and its relevant recovery transitions.",
      "Tools": "Use repository test adapters and qualified manual review where needed.",
      "Resources": "Synthetic fixtures, a test environment, accountable owner and evidence store.",
      "Outcomes": "The function has a valid non-drag single-pointer route or a proven criterion exception.",
      "Feedback": "Preserve observations and create a linked regression check after repair.",
      "Constraints": "Do not weaken security, erase information or reduce task functionality.",
      "Value": "Support independent operation of this task without the recorded barrier.",
      "Failure mode": "An assertion fails, remains unknown or regresses in a relevant state."
    },
    "meta_variables": [
      "Scope",
      "Detectability",
      "Propagation",
      "Reversibility"
    ]
  },
  "tests": [
    {
      "method": "mixed",
      "steps": [
        "Reach the reorder function.",
        "Complete the same move using simple pointer activation, not dragging.",
        "Inspect the outcome and any claimed exception."
      ],
      "expected": "The function has a valid non-drag single-pointer route or a proven criterion exception.",
      "evidence_required": [
        "build and test fixture",
        "rendered interaction observations",
        "reviewed manual evidence where required"
      ]
    }
  ],
  "metrics": [
    {
      "measure": "supported required assertions",
      "unit": "count",
      "decision": "No false or unresolved required assertions.",
      "denominator": "All applicable planned assertions for this bound instance."
    }
  ],
  "guardrails": [
    "A keyboard-only alternative cannot substitute for the pointer assertion.",
    "Retain the item and its correct position."
  ],
  "owner": "Assigned accessibility implementation owner",
  "execution_status": "NOT_TESTED"
}