Generate Powder Doser CAD via full CADSmith workflow with Opus base model

[Copilot]

Runs the full CADSmith pipeline (Planner → Coder → Executor → Validator → Refiner) over the self-contained Powder Doser engineering spec, with Claude Opus as the base model for every agent, producing each printed part and a tilt-0° assembly as manifold STEP solids.

Agent model configuration (autofab/agents.py)

• Models are now selectable via AUTOFAB_BASE_MODEL (Planner/Coder/Error-Refiner/Refiner) and AUTOFAB_JUDGE_MODEL (Validator); defaults preserve prior behavior.
• Fixes a latent break: the Judge model was hardcoded to claude-opus-4-20250514, which now returns 404. Judge falls back to the base model when it is Opus-class.

export AUTOFAB_BASE_MODEL=claude-opus-4-5
xvfb-run -a python scripts/run_powder_doser.py

Part-by-part runner (scripts/run_powder_doser.py)

• Decomposes the §2 assembly into focused, datum/tolerance-faithful sub-prompts (§1/§6/§7 context shared), runs the agentic loop per part, and writes model.py + part.step + render.png + result.json.
• Resumable (skips parts with an existing result.json); tolerates per-part failures to keep the loop going.

Full-assembly colored isometric renders (scripts/render_assembly_isos.py)

• New render_colored_iso_views (plus ISO_AZIMUTH_SWEEP and a contact-sheet helper) in autofab/render.py renders multiple STL solids together, each as its own colored Phong-shaded actor, from an arbitrary set of (name, elevation, azimuth) viewpoints.
• scripts/render_assembly_isos.py execs the assembly model.py, reuses its individual component solids (skipping the union bridges), and colors each by role — brass auger + gear band, grey plates/brackets/hinge pin, black NEMA 11 & MG996R bodies, green pinions. It renders a full isometric azimuth sweep — assembly_iso_az000.png … assembly_iso_az315.png (45° steps at a ~30° iso elevation), matching the reference assembly-render convention — plus a tiled assembly_iso_contact_sheet.png, into cad/powder-doser/powder_doser_assembly/iso/.

xvfb-run -a python scripts/render_assembly_isos.py

Inputs & outputs

• data/prompts/powder-doser-assembly-prompt.md — the verbatim self-contained prompt.
• cad/powder-doser/ — 10 printed parts + bench-test auger + threaded cap + assembly (with an iso/ folder of multi-angle, per-part-colored assembly renders), plus summary.json and README.md.
• .gitignore — keeps STEP/source/renders/logs; excludes regenerable STL meshes (one tessellated thread exceeded 80 MB) and per-iteration scratch.

Results

12/12 solids are valid and round-trip through STEP; 11/12 fully converged on the kernel + vision Judge. auger_cap (printed internal-thread fit) is a valid solid but not Judge-signed within the 3-refinement budget — re-runnable with a larger --max-refinements.

Notes

• The issue's "Opus 4.8" has no released build; the newest available Opus (claude-opus-4-5) was used and noted in the README.
• The assembly is a representative single solid: off-the-shelf parts (NEMA 11, MG996R) are envelopes and gear teeth are simplified to bands for the assembly view; printed gears elsewhere are involute approximations.

[sgbaird]

@copilot I need full assembly renders at various iso angles

[Copilot]

@copilot I need full assembly renders at various iso angles

Added full-assembly renders at several isometric angles in cad/powder-doser/powder_doser_assembly/iso/ — four corner views (front_right, back_right, back_left, front_left) plus top_down and low_front, with a tiled assembly_iso_contact_sheet.png. They're produced by a new scripts/render_assembly_isos.py (STEP → STL → multi-iso PNGs via the new render_stl_iso_views helper in autofab/render.py); regenerate with xvfb-run -a python scripts/render_assembly_isos.py.

[sgbaird]

@copilot use different colors for various parts, similar to what's shown in: https://github.com/vertical-cloud-lab/powder-doser/blob/8feb6a6cfd06c3c46d6f89f779d419f792a8f00d/cad/mounting-plate-assembly/assembly/assembly_iso_az090_hires.png from https://github.com/vertical-cloud-lab/powder-doser/tree/copilot/add-servo-angle-control

Use the same iso perspective angles as what's shown in above image, too

[Copilot]

@copilot use different colors for various parts, similar to what's shown in: https://github.com/vertical-cloud-lab/powder-doser/blob/8feb6a6cfd06c3c46d6f89f779d419f792a8f00d/cad/mounti...

Done. The assembly is now rendered with per-part colors by reusing the individual components from the assembly model.py (brass auger + gear band, grey plates/brackets/hinge pin, black NEMA & MG996R bodies, green pinions). They're rendered across the same isometric azimuth sweep as the reference: assembly_iso_az000.png … assembly_iso_az315.png (45° steps at a ~30° iso elevation), plus a tiled assembly_iso_contact_sheet.png, in cad/powder-doser/powder_doser_assembly/iso/. Regenerate with xvfb-run -a python scripts/render_assembly_isos.py.