docs: serve llms guidance as public asset

public/llms.txt

@@ -6,6 +6,50 @@
 > post-dates model training data, so rely on THIS document, not prior web-framework
 > assumptions.
 
+## This repository
+
+This is the **WRNexusJS documentation application**, not the framework monorepo. It is a
+standalone WrNexus `0.2.15` site that documents all 25 installed `@wrnexus/*` packages.
+
+- `app/pages/index.wrn` is the documentation home page.
+- `app/pages/getting-started.wrn`, `architecture.wrn`, `language.wrn`, and
+  `packages.wrn` are the main guides.
+- `app/pages/packages/<name>.wrn` is the generated documentation page for
+  `@wrnexus/<name>`.
+- `scripts/generate-docs.ts` regenerates package pages from each installed package's
+  README and TypeScript declarations. Run `bun run docs:generate` after dependency or
+  documentation changes; do not hand-edit generated package pages unless intentionally
+  changing the generator's output.
+- `wrnexus.config.ts` owns PWA/mobile metadata, SEO, fonts, and Tailwind v4 processing.
+- `app/styles/global.css` owns the documentation site's global presentation.
+- `app/routes.gen.ts`, `.wrnexus/`, and `dist/` are generated output. Do not treat them
+  as source files or edit them by hand.
+
+For framework API questions, use the installed package as the authoritative source:
+
+1. `node_modules/@wrnexus/<package>/README.md` for concepts and examples.
+2. The package's exported `.d.ts` declarations for the exact public API used by this
+   release.
+3. This file for framework-wide conventions and common patterns.
+4. Generated `app/pages/packages/<package>.wrn` only as the website representation of
+   the first two sources.
+
+Do not assume APIs from a newer or older WrNexus release. The active release is recorded
+in `package.json` under `wrnexus.version`, and all `@wrnexus/*` dependencies should stay
+aligned to that version.
+
+## Project commands
+
+```bash
+bun install                 # install dependencies
+bun run docs:generate       # regenerate all package documentation pages
+bun run dev                 # start the WrNexus development server
+bun run test                # run application tests
+bun run check               # lint, test, and verify formatting
+bun run build               # production build to dist/
+bun run start               # run dist/server.js
+```
+
 ## Golden rules
 
 - **Pages, components, and layouts are `.wrn` files.** Do NOT write `.tsx`/`.jsx`/React