# SP-000 Reference Pattern — Style Guide

Status: active. Release 26.02. Modified 2026-02-10. Licence: CC BY-SA 4.0.

Scope: Meta-pattern defining the structure, visual conventions, and writing style for all OSA security patterns. This is not a security architecture pattern itself — it is the canonical reference that pattern authors use to ensure consistency across the catalogue.
Use when: Any author creating a new OSA pattern. Any revision to an existing pattern diagram.
Not when: Not applicable to non-pattern content (blog posts, framework pages, control pages) which follow their own conventions defined in the Astro component templates.

## More
- Every control and what it mitigates, as JSON: /api/v1/patterns/SP-000/crosswalk
- The same for every control, with its clauses in a framework: /api/v1/patterns/SP-000/crosswalk?framework={framework id}. Framework ids are listed in /llms.txt
- The pattern's prose, examples and references as JSON, 17 KB: /api/v1/patterns/SP-000
- Page for people: /patterns/sp-000/

This card, the API and the page are generated from one file. Checking one against another adds no evidence.