[AadiJo]

A local preview has to produce geometry. This adds a geometry layer on OpenCascade (WASM) so std's own modeling features run locally, starting with what a typical "cut holes into a face" script needs.

• src/geometry/Model.ts keeps a topology registry. Every body, face, edge and vertex gets a transient id that survives operations through OpenCascade's history, records the feature that created it (what qCreatedBy answers), and carries attributes. State is immutable, so std's feature rollback stays cheap. Seam edges and full-circle vertices are left out, so topology counts match Onshape's.
• Builtins for sketches (lines, circles, arcs, points, regions), opExtrude, opBoolean, opDeleteBodies, evPlane, attributes, and the query types std's extrude path uses. Std's fCuboid and extrude run unmodified.
• Preview output: tessellation to GLB with the previewed feature's faces in amber.
• Corpus cases (corpus/<case>/case.json) are the gate: test/corpus.e2e.test.ts runs each one, checks statuses, volumes and topology counts, and writes a PNG, GLB and JSON report to .cadsense/fs-corpus/<case>/.

Stacked on #128.

Testing: vp test run in packages/featurescript, 333 tests. The bolt circle case cuts six 5 mm holes through a 100 x 60 x 10 mm plate through std's real extrude. The volume matches the analytic 58821.9028 mm³ and the counts are 12 faces, 24 edges and 8 vertices, in about 80 ms. Geometry tests cover rollback of a failed feature's geometry and transient ids across features.

Not yet checked against Onshape recordings: plane origins from evPlane, sketch body structure, and query result order are listed as open in FeatureScript.md.

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Project	Deployment	Actions	Updated
cadsense	Ready	Preview	Oct 30, 2026 5:43pm UTC