feat: add section navigation and embedded Archify diagrams

README.md

@@ -25,6 +25,12 @@ Pull requests validate only. Pushes to `main` validate, build, and publish to th
 
 After publication, verify the exact commit’s Actions task and deployed page body; an OAuth redirect is not content verification. Future changes should use pull requests. Never commit credentials or edit generated `build/` output.
 
+## Sections and diagrams
+
+Top-level sections are Organization, Strategy, and Contribution, each with an independent sidebar. The first Organization page is Structure and contains an explicitly illustrative organization chart, not confirmed Eldorado reporting lines.
+
+Archify 3.0.1 is vendored under `vendor/archify/` from commit `d5a1333d7447c866a765adac7d4d062f2f02e4d2`. MIT and third-party notices are preserved. `diagrams/` holds editable JSON; `pnpm diagrams:build` validates and generates local standalone viewers before every site build. The iframe is sandboxed without same-origin permission. See `docs/contribution/diagrams.md` for capability analysis, authoring, boundaries, and upgrade procedure.
+
 ## Design
 
-Inspired by https://www.eldorado.gg/: Lato, near-black navigation, charcoal, gold `#ffc950`, light panels, bold headings. Original documentation artwork and square panels; no official marketplace assets or business claims. See `docs/reference.md`.
+Inspired by https://www.eldorado.gg/: Lato, near-black navigation, charcoal, gold `#ffc950`, light panels, bold headings. Original documentation artwork and square panels; no official marketplace assets or business claims. See `docs/core/reference.md`.