refactor changes

shared/README.md

@@ -0,0 +1,15 @@
+# margin-shared
+
+The faces, palette and glyphs [Margin](../) and Margin Docs both draw from. It is the one copy of
+the decisions the two apps have to agree on: which six fonts they offer, what their named pairings
+are, the 35 design tokens they share, and the title bar icon paths.
+
+No build step and no dependencies. Both apps resolve the TypeScript source directly through their
+bundler, so an edit here is live in both on the next dev server restart.
+
+Margin consumes it as `"margin-shared": "file:./shared"`. Margin Docs, which lives in a separate
+repository, uses a relative path to this directory; see its `package.json`.
+
+The font binaries in `fonts/` are the source of truth, and each app keeps a vendored copy under
+`public/fonts` because its Rust PDF exporter reads them with `include_bytes!` before any npm install
+has run. Run `pnpm fonts:sync` in an app to refresh that copy and `pnpm fonts:check` to verify it.