feat(docs): add /llms.txt for LLM-friendly site context (#7)

feat(docs): add /llms.txt with sidebar link

Auto-generates from registry.json. Added to Getting Started nav.

Co-authored-by: Justin Levine <20596508+justinlevinedotme@users.noreply.github.com>

Author: jal-co

app/llms.txt/route.ts

@@ -0,0 +1,66 @@
+import { NextResponse } from "next/server"
+import registry from "@/registry.json"
+
+export const dynamic = "force-static"
+
+export function GET() {
+  const items = registry.items
+
+  const componentLines = items
+    .map((item) => {
+      const url = `https://ui.justinlevine.me/docs/components/${item.name}`
+      return `- [${item.title}](${url}): ${item.description}`
+    })
+    .join("\n")
+
+  const registryLines = items
+    .map((item) => {
+      return `- [${item.name}.json](https://ui.justinlevine.me/r/${item.name}.json): Registry JSON for ${item.title}`
+    })
+    .join("\n")
+
+  const body = `# jal-co/ui
+
+> jalco ui is a React component library by Justin Levine. It ships polished, composable components for React and Next.js projects, distributed via a shadcn-compatible registry. Install any component with a single command or copy the source directly.
+
+## Install
+
+Components are installed using the shadcn CLI. No npm package to install — each component is copied into your project as source code.
+
+\`\`\`
+npx shadcn@latest add https://ui.justinlevine.me/r/<component-name>.json
+\`\`\`
+
+Replace \`<component-name>\` with any component name listed below.
+
+## Key details
+
+- Built with React 19, Next.js 15, Tailwind CSS v4, and Radix UI primitives
+- All components are server-component-first where possible
+- No wrapper package — components are copied as source into your project
+- Uses class-variance-authority for variant systems
+- Designed for accessibility, composability, and copy-paste ergonomics
+- Source: https://github.com/jal-co/ui
+
+## Components
+
+${componentLines}
+
+## Registry JSON
+
+${registryLines}
+
+## Optional
+
+- [Installation guide](https://ui.justinlevine.me/docs/installation): How to set up jalco ui in a new or existing project
+- [Color Themes](https://ui.justinlevine.me/docs/themes): Available color themes and how to customize them
+- [GitHub](https://github.com/jal-co/ui): Source code repository
+`
+
+  return new NextResponse(body, {
+    headers: {
+      "Content-Type": "text/plain; charset=utf-8",
+      "Cache-Control": "public, max-age=3600",
+    },
+  })
+}

lib/docs.ts

@@ -37,6 +37,7 @@ export const docsNav: NavGroup[] = [
       { title: "Components", href: "/docs" },
       { title: "Installation", href: "/docs/installation" },
       { title: "Color Themes", href: "/docs/themes" },
+      { title: "llms.txt", href: "/llms.txt" },
     ],
   },
   {