CAD feature coverage: native engine versus editor

Scope: development snapshot of the BaroCSS CAD family. This is an entry point for deciding which workflows to try, not a completion percentage or a commercial CAD certification.

A feature is usable in the modeling workspace only when its native provider accepts the required geometry, the Editor exposes that particular workflow, and the user's actual device successfully renders/accepts it. Code presence or a passing docs check does not establish all three.

Feature / user goal	Native implementation	Editor workflow	Authored save/reopen	Browser/GPU evidence for this manual
Rectangle/polygon sketch → +Z extrusion	Qualified bounded convex-planar profiles	#/model named-parameter presets	Supported for admitted cad.model() recipes	Not freshly run for these lessons
Circle sketch → round post	stored-rational-circle-prism; exact stored boundary only	Create a round post preset	Authored radius relation and named post output	Not freshly run; Certified volume unavailable
Rectangular through-hole in plate	stored-rational-plate-hole family, strict placement/qualification	Mounting plate with a through-hole preset	Admitted model saved and rebuilt	Not freshly run; Certified volume unavailable for hole-part
Underside pocket or through-window	Restricted rectangular cutter, one accepted retained part	Cut an underside pocket preset	Preserves named part, plate, tool outputs	Not freshly run
Top-entry pocket (Z=8 downward)	Bounded owned positive extrusion with derived from=8-depth; integer-cell difference	Cut a top-entry pocket preset; guided lesson	Preserves part, plate, tool and authored derived Z origin	Not freshly run; depth4/6/8 based on native provider, edited preview mocked
Constrained polygon plate	Bounded native constrained sketch and +Z extrusion; not direct rectangular authoring	Resize a constrained plate preset; guided lesson	Authored points, constraints, width/height and fixed 8 mm thickness	Not freshly run; lockY internal, edited-state meshes mocked
Union of rectangular extrusions	Restricted connected orthogonal-cell material	Fuse an L-bracket preset	Preserves base, leg, bracket	Not freshly run; edge-only/disconnected refused
Convex intersection and through-slab cut	Bounded convex/native operation families	Available through admitted modeling examples	Bounded authored-graph save/rebuild	Per-feature evidence; no general browser guarantee
Cardinal-edge chamfer and some splits	Qualified restricted edges/planes	Admitted modeling presets, selected options	Bounded parameter edit and rebuild	Per-feature evidence; not arbitrary fillet/chamfer
NURBS Curve/Surface control edits	Original native coefficients, knots, weights, qualified operations	Separate Surface/Curve editor workspace	Original document files retained	Existing focused flows; not blanket device parity
Boolean-extrusion feature graph	Native Face/Boolean/extrusion graph, scoped parameter/feature transactions	Separate New Boolean extrusion workspace	Accepted native authored graph	Existing bounded flow receipts; not general solid Boolean
Assembly authoring	Selected native assembly contracts and bounded flows	Separate assembly workspace work exists	Case-specific	Not established as general assembly/mate support
General sketch constraints and drag solver	Some exact affine/radius/tangency increments	Specialized driving-sketch work	Case-specific	Full interactive/global constraint solver unverified
Arbitrary curved Boolean, fillet and topology naming	General solution not established	Not a generally supported modeling operation	Not generally supported	Not established
Binary STL export of a named convex output	Accepted convex-planar body, native revalidation and at most 40 Float32 facets	FILE → Export accepted STL, explicit STL output; STL versus editable model	STL is a separate triangle handoff with an mm convention, not authored Save/Open or native feature-history interchange	Not freshly run in this Manual; disk, slicer and device proof remain separate
STEP exchange and production 2D drawings	Commercial-grade target in roadmap	General workflow not established	Not generally supported	Not established

What the status labels mean

• Qualified bounded means source and provider evidence support only named input/operation families and the stated refusal rules.
• Editor workflow means an actual route, preset or tool exists; it does not certify every supported native operation is exposed through a single UI.
• Save/reopen means accepted authored intent is serialized and rebuilt for a specific format, not that meshes, viewport state or arbitrary CAD interchange are preserved.
• Not freshly run means these Manual changes have not performed new real-device browser/GPU/file validation. Consult browser evidence requirements before upgrading a status.

Where to learn and verify

Start with the CAD learning path, then consult native modeling and specific refusal cases and native capability details. The CAD Editor developer guide documents its separate session and React workflows.

When a new tool is merged, update only the affected row with its true native, UI, save and browser evidence. A completed Issue or exported function alone is not reason to mark the entire tool family complete. Keep source-adoption, local testing, actual browser/GPU and release/publication independently visible.

Current verification status of this table: source and repository documentation review only; live browser run, GPU readback, and physical file roundtrip remain UNRUN in this documentation change.