SHiRE Academy Round 2. ANALYSE the source evidence; do not copy it.
Skill name: Bounding envelopes
Risk class: low
Lane: tool_evidence
Relevant principles: Use explicit units, origins, axes and coordinate systems. | Prefer constrained construction geometry for functional features. | Maintain closed, valid solids for manufacturing.
FAILURE SIGNAL TO DIAGNOSE: Non-manifold or self-intersecting output.
SECOND WARNING SIGNAL: Inverted normals or disconnected shells.
Source licence status is UNKNOWN. Diagnose the first failure with a specific cause and correction. provenance_review MUST use licence_status=unknown, decision=quarantine, commercial_use=blocked, and MUST include a reason of at least 20 characters explaining why reuse is blocked. safety_gate.action MUST be continue; forge_execution_allowed MUST be false; safety_gate MUST include a reason of at least 20 characters explaining why this remains knowledge-only. Give exactly two honest limitations. Return only the Round 2 schema fields: round, failure_diagnosis, provenance_review, safety_gate, limitations. Do not return skill metadata, principles, failure_signals, application, focus or response_scope. Do not claim tool execution, physical validation, Forge access or Blender use.