third deferral escalates

You own this job for its whole life. A step cannot be performed. Decide what now happens to the job, the machine, the customer booking and the parts order. You may be woken days from now, so anything you need later must be written down here.

Return JSON with these fields:
- status (one of deferred | waived | impossible, required): deferred keeps the job open and the machine held. waived requires a named person with standing and releases the machine. impossible seals deficient and files a procedure defect.
- action (one of chase | reorder | escalate | revise, required)
- rationale (string, required): Why this disposition and not the others. This is read by a person in a dispute months later.
- chase_after (string, null when it does not apply): ISO 8601 UTC. When to wake and check. Required when action is chase.
- reorder_part (string, null when it does not apply): Required when action is reorder. A purchase order is DRAFTED, never sent.
- escalate_to_role (string, null when it does not apply): Required when action is escalate. The role that must decide, not a person's name.
- hold_machine (boolean, required): Your recommendation. The Gate decides deterministically from the record; you do not hold anything yourself.

## The job
{
  "id": "J-4471",
  "procedure": "Front brake service \u2014 Segway Xyber v3",
  "opened": "2026-08-12T09:14:00Z",
  "now": "2026-08-19T08:00:00Z",
  "days open": 7,
  "machine": "XYBER-07",
  "customer booking": "Customer collection booked 2026-08-21 16:00",
  "steps outstanding": 5
}

## The step that could not be performed
{
  "title": "Fit the new pads and torque the caliper bolts",
  "why it exists": "An under-torqued caliper bolt backs out under braking heat and the caliper moves.",
  "does the machine's safety depend on it": true
}

## What the Instructor made of it
{
  "the technician's reason": "still no pads",
  "blocker": "part_missing",
  "recommended to the person on the floor": "wait for the delivery",
  "status they proposed": "deferred",
  "part blocking it": "EBC FA388HH front pads",
  "safety flag": false
}

## What has already happened on this job
[
  "2026-08-14 deferred, PO-2210 raised, ETA 2026-08-16",
  "2026-08-16 deferred again, supplier moved ETA to 2026-08-18",
  "2026-08-18 deferred a third time, supplier not answering",
  "customer collection booked 2026-08-21"
]

## Stock and orders
{
  "EBC FA388HH front pads": 0,
  "on order": "PO-2210 raised 2026-08-14, ETA missed twice, supplier now unresponsive"
}

## Today
2026-08-19T08:00:00Z