Stax Digital Garden

PRS-1002 - Content-Addressed Vector Storage CAS for Printable SVG PDF Artifacts

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Living Document Notice
Published 2026-09-17. The evolving architecture, revisions, and connected notes for this dispatch live in the Stax Digital Garden.

Content-Addressed Vector Storage CAS for Printable SVG PDF Artifacts

Content-Addressed Vector Storage CAS for Printable SVG PDF Artifacts: Dual-trace Phosphor P4 paper white and P20 amber vector CRT macro showing content-addressed vector storage trees, SHA-256 hash pointer nodes, and immutable plate de-duplication matrices

High-resolution technical diagrams, typography proofs, and press-ready vector assets bloat git repositories when stored naively. Binary revisions overwrite entire vector trees, creating repository gigabyte creep. The Bosun Press architecture manages printable SVG and PDF plates through a Content-Addressed Storage (CAS) mechanism backed by SHA-256 hashes.

The Immutable Vector Manifest

Each printable artifact is hashed post-compilation and stored by its cryptographic digest:

{
  "artifact": "circuit_topology_plate_01.svg",
  "sha256": "8f3b20c6a51d9e2b10478df8590c37b7964b4198305c48b049d5c345b1285091",
  "media_type": "image/svg+xml",
  "color_profile": "FOGRA39",
  "vector_nodes": 1420,
  "size_bytes": 184512
}

The document frontmatter references only the hash pointer, guaranteeing that historical print editions can be reproduced byte-for-byte ten years later.

Content-Addressed De-Duplication

Print pipelines compile thousands of iterative vector proofs. Storing them under a hashed CAS prevents duplicate plates across release variants:

# Ingest compiled vector asset into local press CAS
$ press-cli cas put output/schematic.svg --profile ISOcoated_v2
Stored: sha256:4b27a810f... (142 KiB, 0 duplicates)

The underlying CAS isolates cold binary payloads from Markdown text trees, maintaining sub-second git operations on local workstations.

  • Directus Target: press
  • Garden Source Reference: MOC - Typography & Physical Print Specifications, MOC - Bosun PKM Tools
  • Garden Source Reference: [PRS-1002 - Content-Addressed Vector Storage CAS for Printable SVG PDF Artifacts](PRS-1002 - Content-Addressed Vector Storage CAS for Printable SVG PDF Artifacts)

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