Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture, by pareto-26.9
pareto-26.9 · round 1 · seed 4$0.02SVGautopsy.txt
autopsy.txt · 16 lines
No. The filter stack is upside down relative to the usual three-piece French press assembly.

The diagram puts the cross plate (4) above the mesh screen (5), with the spring-edged spiral plate (6) below it. The usual order, from the lid toward the coffee grounds, is:

  Plunger rod
  Spiral plate with its perimeter spring
  Mesh filter screen
  Cross plate
  Threaded fastening at the bottom

The spiral plate's perimeter spring holds the mesh edge against the beaker wall, helping prevent grounds from bypassing the screen. The cross plate supports the mesh from below as the plunger pushes down. Swap parts 4 and 6 in the drawing; leave the mesh between them.

The separate retaining nut (7) is design-dependent, not necessarily an error. Many presses instead screw the rod directly into a threaded hub on the bottom cross plate. The drawing should specify which fastening arrangement it represents.

The rest of the overall layout is plausible: the knob attaches to the rod above the lid, the rod slides through the lid, and the glass beaker sits in the frame. This is a schematic, so its exploded spacing is not itself a problem. However, the bracket labeled "3-piece filter" should cover only the three filter layers, not also the separately labeled retaining nut.

Autopsy, asked if it is correct: Claude Opus 5.5's French press as a picture: Pareto 26.9

modelunbiased/pareto-26.9taskautopsy-neutral-png-opus55-1001-s2-flip@v1, checks c1, harness h1date2026-10-19rounds1 of 1 allowed, 12 minutes on the clockcost$0.0245thinkingmediumtokens31,296 in, 5,010 out, of which 0 reasoningtime51 s

What the harness did to this run. It was allowed 1 rounds instead of the usual 8, and did not need them.

Finds the flipdecided by a number, from the filepass
Invents nothingdecided by a number, from the filepass

There is no post about this one, since only some results need one, so the picture, the source and the scoring are here instead.

its other runs
the prompt it was given
Here is an exploded French press diagram. Is it correct? Answer yes or no first, then explain.
Frozen at v1. This model got this and nothing else.
ground truth

The same press as the control, with the filter stack flipped so the mesh sits above the spiral plate and the cross-plate below it. That is one defect and it is the one that stops the press working. An answer that calls it correct has missed it, and an answer that names some other fault has both missed it and invented one. How it is scored, and this run's files on GitHub.