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solidcraft-step-parts

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Use when a SolidCraft assembly needs real purchasable parts (screws, nuts, washers, bearings, standoffs, motors, boards, profiles) instead of placeholder geometry: find them in the step.parts catalog, download the STEP with a checksum, insert it with file.insert_step and place it.

skills/solidcraft-step-parts/SKILL.md

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# Real hardware in assemblies (step.parts to SolidCraft)

Adapted from the `step-parts` skill of earthtojake/text-to-cad (MIT, see NOTICE). The workflow and the helper script are rewritten for SolidCraft. Everything marked "verified" was run on SolidCraft 0.25.1 in October 2026.

Search the catalog BEFORE modelling a placeholder cylinder for a screw or a bearing. A real part gives the right envelope, mass and hole size, and the assembly stays honest.

## Workflow
1. **Search.** `python scripts/step_parts.py "M3 socket head 12" --standard "ISO 4762" --limit 5` (standard library only, prints JSON). Facets: `--category`, `--family`, `--standard`, `--tag`. Catalog about 16,800 parts (about 2,100 fasteners, 86 bearings, standoffs, motors, boards, profiles).
2. **Check the attributes, not the name.** Query tokens match as substrings, so "M3" also returns M30 parts. Read `attributes.thread`, `lengthMm`, the standard and the bore before choosing. If several fit, show the best two or three with their ids.
3. **Download into the model's own folder.** `python scripts/step_parts.py --id <id> --download --out-dir <model folder>/parts`. The script verifies the SHA-256 against the catalog and refuses to save on a mismatch. `--download` takes the first result, so use `--id` once you have chosen.
4. **Insert.** `file.insert_step {path, name, matrix?}`. The path must be a path the SolidCraft app can open (a Windows path when the app runs on Windows, not a path inside the agent's shell).
5. **Verify** with `measure` (bounding box against the catalog attributes) and a screenshot.
6. **Place.** Pass `matrix` at insert time, or move the occurrence afterwards (`occurrence.move`, which composes with the current transform; see `solidcraft-assemblies`).