Aixle

Appearance

Award trophy, again: the agent's report ​

Round 3: the round-2 brief re-run by a fresh agent against the tool as fixed after round 2, with three additions: use at least two new features, ship a GLB, and verify it by a viewer screenshot and a re-import round trip. The agent was forbidden to read the earlier attempt. Nine render iterations.

What follows is the agent's report, verbatim. The "fixed" notes in the index (dogfood/README.md) say what changed in the tool because of it. trophy_reimport_probe.aix is the round-trip program.

1. The model ​

A 3.58 × 5.43 × 3.54 loving-cup trophy on +z: a two-step marble base (material("marble", scale=0.5)), a silver nameplate 0.16 thick on the lower step's front with "CHAMPION" / "BEST IN SHOW 2026" engraved 0.08 deep in text(face="serif"), a silver foot, an eight-point-star profile extruded and twist(50)ed into a fluted spiral stem, collar and knop, a gold revolved cup with a vertical band at the rim carrying "AWARD OF EXCELLENCE" as extrude(text(...), 0.08, "z") | wrap(1.18), two silver strap handles (sweep(ellipse(0.14, 0.09), curve([...])), mirrored), a domed gold lid and a star finial on a post. It matches the plan in every part; the only departures were shrinking the rim text so it clears the handles and switching line 2 to capitals. New features used: wrap, text(face="serif"), curve for the handles, set light_azimuth/set light_elevation, and a --focus nameplate close-up. All five did what the docs said: wrap put x=0 on +z reading left to right, the serif face was legible as a nameplate, curve gave a facet-free handle, the focus render re-extracted the plate at cell 0.013 with slices through it and framed the beauty on it.

2. Friction log ​

  • post = cylinder(0.08, 0.25) | move(0, 4.8, 0) with finial = extrude(star(5, 0.3, 0.13), 0.08, "z") | move(0, 5.15, 0) — the star floated 0.1 above the post (its body bottom at y 5.02, the post top at 4.925; only its two lower tips reach lower, and they are off-axis). Expected: the "separate pieces" warning to name the finial. Got: warning: 1 tiny speck of mesh (under 0.1% of the volume): a sliver left by a cut or a part thinner than a cell. while the pieces warning pointed at the cup. The report's Pieces | 3 (volumes 14.394, 3.104, 0.009) gave it away only because a 5-point star of R 0.3, r 0.13, 0.08 thick is 0.0092 by hand. The front view looked joined. Fixed by lengthening the post to y 5.07. The speck warning should say where the speck is and which step it belongs to, as the pieces warning does.
  • cup = revolve(bowl) ... + lid = ... — a lidded hollow cup. Expected: no warning, or "enclosed cavity". Got, on every full render: warning: The model is 2 separate pieces: the largest is 14.44, the loose piece is volume 3.103 at (0, 3.85, 0) in 'cup', 'handles'. A piece not touching the rest floats free: overlap parts slightly, or use scene for separate objects. The "loose piece" is the cup's internal void (the X=0 slice shows it). A closed shell inside another is a cavity, not a piece; also the "largest" volume 14.44 exceeds the reported model volume 11.8 because the void is being counted as solid. I could not make this warning go away without filling the cup, so the report never reaches "no warnings".
  • lid = (cone(1.2, 0.8, 0.22) | move(0, 4.5, 0)) + (ellipsoid(0.8, 0.28, 0.8) | move(0, 4.61, 0)) | paint("gold") — I expected the whole lid to be gold; | binds tighter than +, so only the ellipsoid was painted and the cone ring came out beige (the default material) on the sheet and in the 1024-px beauty, with no warning. The docs do say the precedence, but a step that unions a painted part with an unpainted one deserves a note ("cone in lid has no material"). Fixed with an outer parenthesis.
  • line2 = extrude(text("Best in Show 2026", 0.12, weight=0.05, face="serif"), ...) — check said "no warnings", but the counters of e, a, o closed up (weight 0.05 on 0.12 cap height leaves gaps under a cell) and this is where the Watertight: no: 64 edges ... came from. The text warning only guards the stroke weight, not the gap between strokes; a "counters narrower than a cell" warning, or a hint that lowercase needs size ≥ ~3× weight, would have saved an iteration. Worked around with capitals at size 0.13, weight 0.045.
  • Watertight | no: 137 edges ... The edges are within x -1.682..1.679, y 0.141..4.304, z -0.227..1.839, in 'trophy' — the box is the union of every bad edge, so it spans the whole model and names only the final step. I never found out where the remaining 137 edges are (the y range hints at line2 and the rim text). Clusters with the nearest named step would be usable.
  • --focus nameplate sheet, RIGHT view — the clipped-off base is drawn in a tan/clay colour that is none of my materials (the marble shows in the other views). I guessed it is the clip face rendered in the default material; the docs do not say. Not a blocker, but it looks like an unpainted part until you work it out.
  • The 512-px front.png/sheet cannot show a 0.045-wide stroke — "CHAMPION / BEST IN SHOW 2026" is blobs at sheet scale; only --focus made it readable. The guide does say to use --focus for a small part, but nothing says a full-size sheet is the wrong tool for judging lettering legibility; I spent iteration 3 looking at the wrong picture.
  • m = import("../out/trophy/model.glb") — sampling the 337 k-triangle GLB took 34 s at the default resolution=96, and check re-samples it (another 34 s) before render does; at resolution=192 it took 145 s. No cache and no progress line while it runs. Also check printed the bounds as y -0..5.43 (a "-0").
  • Import drops materials — the re-imported trophy is one clay colour. import's reference entry says "can be cut, blended, hollowed and painted like any shape" but not that the GLB's own atlas is ignored; I inferred it from the picture.
  • Quick pass (render --quick) printed 5 steps are thinner than this pass's 0.085 cell ... (line1, line2, collar, rim_text, finial) — accurate and helpful, but it means a quick render says nothing about the two features the brief cares about most, so I went straight to full renders (17–27 s each with --beauty; the 1024-px beauty alone is 8.5 s, the atlas/GLB export 6 s per run even when I only wanted pictures).
  • Rim text vs handles: text("AWARD OF EXCELLENCE", 0.2, ...) | wrap(1.18) spanned ±78° and ran behind the handles at ±90°. check prints the wrapped x-span (2.31), not the arc angle; I had to back the angle out with asin. A "wraps N degrees of the cylinder" note in check would make this a one-look decision.
  • Viewer screenshot: blank canvas (see 3); the page reports no error when three.js fails to arrive, so the viewer gives no diagnosis of its own.

3. Export verification ​

  • Viewer: shot.mjs printed webgl: true errors: [], and the PNG shows the header — "trophy 3.75 × 5.45 × 3.54 units · 337120 triangles" with Perspective/Front/Right/Top/Wireframe/Grid buttons — over an empty grey canvas. curl through the sandbox proxy fetches https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js (HTTP 200, 1.27 MB), so the CDN is reachable from the shell; the headless Chromium either did not get the module within the script's 8-second wait or failed silently. Per the brief, one attempt only.
  • Round trip (trophy_reimport.aix, default resolution=96, sampled at cell 0.057): size 3.581 × 5.428 × 3.543 vs the original's mesh extent 3.58 × 5.428 × 3.54 (the original's reported bounds are 3.75 wide only because the handle curve's box is loose); triangles 93 632 vs 337 120; volume 11.778 vs 11.807; the re-import repeats the same "2 pieces (14.849, 3.072)" cavity warning, so the enclosed void survived. Visible differences: everything is one clay material; the engraving is a smeared trace on the plate, not readable; the rim lettering is a lumpy band of bumps, not readable; the star, handles, twisted flutes, knop and stepped base all survive with softened edges. At resolution=192 (cell 0.028, 145 s): 94 884 triangles, volume 11.799, the rim bumps become letter-shaped ("...OF EXCELLENCE" is guessable in the front view) and the engraved lines become readable-as-two-lines but not as words. So geometry round-trips; lettering at these sizes does not at the default resolution and only partly at twice it.

4. What worked well ​

check in under a second with every step's box is the right first stop; the steps sheet with names and sizes caught nothing wrong this time but confirmed each part in one look; slices are exactly the truth about the cavity and the engraving depth; --focus with --out is superb — separate folder, re-extracted at the part's own cell, slices through it, beauty framed on it; wrap, curve, face="serif", twist on an extruded star, and revolve of a polygon all behaved as documented on the first try; the beauty render made gold, silver and marble read as themselves at 1024 px with no tuning beyond set light_azimuth -30, set light_elevation 50, set azimuth 20; the pieces warning gives a volume and a centre, which is what made the floating star diagnosable at all.

5. Three changes that would have helped most ​

  1. Tell enclosed cavities apart from loose pieces, and give the speck warning a location and step. The one real floating part was called a "sliver left by a cut" and the deliberate cavity was called a floating piece; the two warnings were exactly swapped, and the cavity one cannot be cleared.
  2. Warn on lettering whose counters (gaps between strokes) are under a cell, not only on stroke weight, and say in text's docs that legibility needs roughly size ≥ 3 × weight for lowercase. This was the source of the non-watertight edges and of one extra iteration.
  3. Warn when a union joins a painted part with an unpainted one (or print a step's material in check); the + ... | paint() precedence slip produced a beige lid with no message, and the same default-material colour appears unlabelled on the focus sheet's clip face.