Examples

The skill ships a gallery of complete, verified parts under skills/implement/examples/<name>.brep.ts, each paired with a <name>.expected.json baseline. They are the few-shot reference the agent reads before authoring, and the corpus the deterministic eval replays. Read the one closest to your task before writing a new part.

Each example is a real .brep.ts you can run directly:

npx -y -p brepjs-cad brep verify mounting-bracket.brep.ts --check --snapshot shots/

Primitives + booleans

Reliable first-try. Start here.

• mounting-bracket: base plate + upright web + bolt holes (box, fuse, cut).
• flanged-coupler: flange + cylinder + bore, chamfered.
• transform-bracket: translate / rotate / mirror composition.

2D sketch → solid

A 2D profile driven up into 3D.

• extruded-bracket: rounded plate + bolt holes (extrude).
• revolved-pulley: V-groove profile revolved around an axis.
• swept-gasket: a frame profile swept along a spine.

Modifiers

Validity-sensitive operations. Verify carefully.

• rounded-block: fillet on selected edges.
• chamfered-block: chamfer.
• hollow-enclosure: a filleted box, shelled to a wall thickness.

Gridfinity

Parametric primitives for the Gridfinity ecosystem.

• gridfinity-baseplate
• gridfinity-bin
• gridfinity-divider

Anatomy of an example

Every example follows the .brep.ts contract: a default-exported zero-arg function plus an expected block that pins its measured dimensions. The sibling <name>.expected.json records the baseline volume, area, validity, and shape-type that the eval replays within tolerance. An intentional geometry change means re-recording that baseline; an unintentional one shows up as a failed eval.

Next steps

• The Verify Loop: the workflow these examples were authored with
• Eval & Scorecard: how the gallery becomes a regression net