Living Document Notice
Staged 2026-09-28. Living revisions and interconnected notes live in the Bosun PKM Garden.
CAD Model Archival and Content-Addressed Geometry Sinks
Fabricating physical hardware and mechanical assemblies requires version-controlled 3D models and CAD blueprints. Scrimshaw catalogs design files (STEP, IGES, STL, F3D) using content-addressed cryptographic hashing to ensure absolute geometric permanence.
Geometry Invariants
- Content-Addressed File Sinks: 3D solid models and meshes verify against immutable SHA-256 CAS hashes (
urn:cas:sha256:...) on disk. - Model Format Declarations: Frontmatter metadata explicitly declares native CAD source formats and target manufacturing processes.
- Traceable Revision History: Geometric modifications link directly to engineering notes and fabrication work orders.
Content-addressed CAD archival guarantees that physical parts can always be reproduced from exact digital geometry.
- Directus Target: scrimshaw-blog
- Garden Source Reference: MOC - Scrimshaw Fabrication Engine, MOC - Fleet Operations, SCG-1001 - Physical Inventory Tracking