feat: strengthen sketches, feature editing, and independent assemblies

docs/occurrence-workflows.md

@@ -37,3 +37,11 @@ Visibility is an independent view setting for exact placements. Hide a path and
 Paths are checked for missing links, repeated IDs, component mismatches and a maximum depth of 64. Descendant expansion rejects more than 100,000 placements or bodies instead of returning incomplete results. Computed body names normally retain their readable occurrence labels; collisions use full occurrence IDs so visibility and body commands still address the correct source.
 
 Placed bodies retain their definition identity separately from display names. Body materials and appearances remain shared, with body overrides taking precedence over component overrides and material colors. Face overrides follow the placed geometry, including pending positions, and painted exports retain these colors.
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+Paste New copies the reachable component definition graph and its feature history. Repeated children stay shared within the new copy, while the copied definitions, sketches and generated dimension/input parameters are independent of the originals. Materials and body, component and face appearances follow the copied definition identities. Pattern and mirror output names remain explicit, so later body operations follow the copied bodies.
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+Configuration columns, row values and internal rules are duplicated for copied targets. Certified native face appearances follow the new feature lineage. Selected cylindrical Emboss target and authoring paths inside the copied graph follow the copied occurrences; an incompatible external authoring context is rejected before adoption.
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+A body reassigned from an external component receives an independent BaseFeature before the first copied feature that modifies it. Copied modifiers then replay once. The command reports these frozen bodies. Public user parameters remain design-wide; retained external sketch, project and feature links are reported. Joints and motion records wholly inside the copied occurrence graph receive new references. Records crossing its boundary are omitted with notices.
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+Copy evaluates on a scratch document, checks that original bodies remain unchanged, and verifies copied body measurements and sampled material occupancy before adopting it. Unsupported cross-boundary destructive operations, configured foreign faces without certified semantic lineage, reassigned mesh bodies, rolled-back timelines and exceeded work limits return errors without a partial copy. A successful copy selects the new occurrence, preserves your active component and unrelated pending positions, and places the copy under the chosen parent occurrence path. Activate the new occurrence to author features in it. Existing 3D sketch wire coordinate behavior is copied unchanged.