Geometry Source Intake

Geometry Source Intake

Produce one typed routing and preparation decision. The calling workflow owns run state, evidence acceptance, artifact lifecycle, and completion. Ownership is atomic: this skill does not own run state, evidence acceptance, artifact lifecycle, or completion.

Procedure

1. Freeze the source path or URI, manifest and artifact digests, format, caller-provided units and axes, rights assertion, provenance, references, requested representation role, and mutation authorization.
2. When geometry.source.v1 is supplied, validate it before reading artifacts:
   • require a regular, bounded manifest;
   • resolve representation paths beneath the manifest directory;
   • verify each selected artifact's size and SHA-256;
   • prefer render_geometry, then design_exchange, collision_candidate, and reference unless a role is explicit;
   • retain producer, revision, coordinates, parts, parameters, rights, and provenance as metadata;
   • never execute native_source or any provider-authored code.
3. Otherwise classify with content_agent_workflows.geometry.route_geometry_request and prepare with prepare_geometry_source or the equivalent service operation. Do not reproduce converter or parser logic in a prompt.
4. Select the least lossy admitted route: direct USD preservation, shared conversion, explicit opaque import, or caller-approved parametric recovery. Generation and revision happen before intake through an explicitly selected GeometryAuthoringProvider.
5. Preserve animation, skin, morph, assembly, material, subset, primvar, articulation, and external-dependency semantics. Block a static fallback when it would erase required behavior or identity.
6. Never guess physical scale for raw polygon formats. Require authoritative units and up-axis before physical, repair, collision, or simulation claims.
7. Reject .py, code blocks, commands, and executable text. An external provider must export a supported immutable artifact first.
8. If geometry is defective, emit diagnosis and route the immutable source to content-workflow-geometry-repair. Do not repair during intake.
9. Return the selected route, prepared artifact and digest, fidelity and editability claims, representation role, source-bundle metadata, reports, warnings, and unresolved dependencies.

Required Distinctions

• A provider-native source representation is provenance, not workflow code.
• design_exchange may preserve exact design geometry but does not imply editable provider history.
• Shared conversion is usable geometry, not recovered feature history.
• A tessellated USD is not exact B-rep and must not populate brep_usd.
• A normalized copy is not optimized geometry.
• A discovered feature is evidence to protect, not authority to invent or mutate geometry.