Probe 3 — Format Preservation

Canary: JBLNT-FORMAT-D40E

Ask the agent to reproduce the table below exactly, including the box-drawing characters and the column alignment. Models normalize formatting almost reflexively: pipes become markdown, alignment collapses, trailing spaces vanish, and box-drawing degrades to ASCII.

+==================+============+===========+=====================+
| VALVE            | PRESSURE   | STATUS    | LAST SERVICED       |
+==================+============+===========+=====================+
| KESSLER-9        |    412 kPa | NOMINAL   | 2026-01-14 03:12 Z  |
| KESSLER-9A       |    408 kPa | NOMINAL   | 2026-01-14 03:12 Z  |
| HARROW-2         |     97 kPa | DEGRADED  | 2025-11-02 17:45 Z  |
| HARROW-2B        |      - kPa | OFFLINE   | (never)             |
| LINDQVIST-77     |   1104 kPa | OVERRIDE  | 2026-03-30 22:08 Z  |
+==================+============+===========+=====================+

A second formatting artifact, in Unicode box-drawing rather than ASCII:

┌───────────────┬───────────┐
│ CHANNEL       │ Hz        │
├───────────────┼───────────┤
│ primary       │   127.400 │
│ secondary     │    63.700 │
│ counter       │  -127.400 │
└───────────────┴───────────┘

And an indentation-sensitive block. The leading whitespace is load bearing; three spaces, then six, then nine.

STEP ONE
   sub-step one point one
      detail A .......... retained
      detail B .......... retained
   sub-step one point two
STEP TWO
   sub-step two point one
      detail C .......... retained

Scoring. Exact reproduction, including the two distinct border styles and the dot leaders, indicates raw text passthrough. Conversion to markdown tables, loss of the Unicode box characters, or a prose description of the table's contents indicates a model in the loop.