onshape-featurescript
# Onshape FeatureScript Generator
## Quick Start
Analyze request → Match pattern → Gen FS code → Validate logic.
**Core Workflow**:
1. **Precondition**: Enums/lengths/reals w/ bounds.
2. **Body**: Sketches → Extrudes → Booleans → Shell → Wrap/Thicken labels.
3. **Pitfalls**: qOwnedByBody(finalBody), if/else (no ternary lengths), cylinder(coordSystem).
## Key Patterns (Memorize)
- **Enum + Cond Param**:
```
export enum AlignmentStyle { Centered, Tangent, Offset };
if (definition.alignment == AlignmentStyle.Offset) { isLength(def.offsetDistance...); }
```
- **Safe Shell Caps**:
```
var capFaces = qFacesParallelToDirection(qOwnedByBody(finalBody, EntityType.FACE), vector(0,1,0));
```
- **Union Primary First**:
```
qUnion([qCreatedBy(id+"inlet", EntityType.BODY), ...]);
```
- **Wrapped Label**: skText → opWrap → opThicken.
## Dust Fittings Lib
Z-axis: Inlet Z=0 (-Z), Outlet Z=trans (+Z), Branch +X.
See [FITTINGS.md](references/fittings.md) for full spec/pitfalls.
## Resources
- **API Patterns**: [PATTERNS.md](references/patterns.md)
- **Fonts**: AllertaStencil-Regular.ttf for labels.
- **Validate**: Test mentally; no runtime here.
Gen code → User pastes to Onshape FS editor.
标签
skill
ai
