Add Fumadocs documentation site with auto-generated API reference

.github/workflows/docs.yml

@@ -0,0 +1,49 @@
+name: Deploy Docs
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'docs/**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: cd docs && bun install --frozen-lockfile
+
+      - name: Build static site
+        run: cd docs && bun run build
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs/out
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

README.md

@@ -4,6 +4,7 @@
 </p>
 
 <p align="center">
+  <a href="docs/">Documentation</a> &bull;
   <a href="#getting-started">Getting Started</a> &bull;
   <a href="#supported-resources">Resources</a> &bull;
   <a href="#sdk-usage">SDK Usage</a> &bull;
@@ -25,7 +26,7 @@ Strimulator is a drop-in local replacement for the Stripe API. It runs as a sing
 - **Full control** — Trigger payment failures, advance subscriptions, simulate edge cases from the dashboard
 - **SDK-compatible** — Point the official `stripe` package at localhost and it just works
 - **Docker-ready** — Drop it into your docker-compose alongside Postgres, Redis, Firebase emulator, etc.
-- **464 tests** — Strict fidelity to Stripe's API shapes, state machines, and error formats
+- **496 tests** — Strict fidelity to Stripe's API shapes, state machines, and error formats
 
 ## Getting Started
 
@@ -275,16 +276,30 @@ tests/
   unit/         # Service-layer tests
   integration/  # HTTP request/response tests
   sdk/          # Tests using the official stripe npm package
+docs/            # Fumadocs documentation site (Next.js)
 ```
 
+## Documentation
+
+Full documentation is available in the `docs/` directory. To run it locally:
+
+```bash
+cd docs
+bun install
+bun run dev
+```
+
+Then open http://localhost:3000 for the docs site with Getting Started guides, API reference, and architecture documentation.
+
 ## Tech Stack
 
 - **Runtime:** [Bun](https://bun.sh)
 - **Framework:** [ElysiaJS](https://elysiajs.com)
 - **Database:** SQLite via [Drizzle ORM](https://orm.drizzle.team) + bun:sqlite
 - **Types:** Imported from the [`stripe`](https://www.npmjs.com/package/stripe) npm package
 - **Dashboard:** [Preact](https://preactjs.com) + [HTM](https://github.com/developit/htm) (loaded from CDN)
-- **Testing:** bun:test (464 tests)
+- **Testing:** bun:test (496 tests)
+- **Documentation:** [Fumadocs](https://fumadocs.dev) + OpenAPI
 
 ## License
 

docs/.gitignore

@@ -0,0 +1,4 @@
+.next/
+node_modules/
+.source/
+out/

docs/app/docs/[[...slug]]/page.tsx

@@ -0,0 +1,42 @@
+import { source } from '@/lib/source';
+import { notFound } from 'next/navigation';
+import {
+  DocsPage,
+  DocsBody,
+  DocsTitle,
+  DocsDescription,
+} from 'fumadocs-ui/page';
+import { getMDXComponents } from '@/components/mdx';
+import type { ComponentType } from 'react';
+
+export default async function Page({
+  params,
+}: {
+  params: Promise<{ slug?: string[] }>;
+}) {
+  const { slug } = await params;
+  const page = source.getPage(slug);
+
+  if (!page) notFound();
+
+  const data = page.data as typeof page.data & {
+    body: ComponentType<{ components?: Record<string, unknown> }>;
+    toc: { depth: number; url: string; title: string }[];
+  };
+
+  const Mdx = data.body;
+
+  return (
+    <DocsPage toc={data.toc}>
+      <DocsTitle>{data.title}</DocsTitle>
+      <DocsDescription>{data.description}</DocsDescription>
+      <DocsBody>
+        <Mdx components={getMDXComponents()} />
+      </DocsBody>
+    </DocsPage>
+  );
+}
+
+export function generateStaticParams() {
+  return source.generateParams();
+}

docs/app/docs/layout.tsx

@@ -0,0 +1,12 @@
+import { DocsLayout } from 'fumadocs-ui/layouts/docs';
+import { baseOptions } from '@/lib/layout.shared';
+import { source } from '@/lib/source';
+import type { ReactNode } from 'react';
+
+export default function Layout({ children }: { children: ReactNode }) {
+  return (
+    <DocsLayout {...baseOptions()} tree={source.getPageTree()}>
+      {children}
+    </DocsLayout>
+  );
+}

docs/app/global.css

@@ -0,0 +1,6 @@
+@import 'tailwindcss';
+@import 'fumadocs-ui/css/neutral.css';
+@import 'fumadocs-ui/css/preset.css';
+
+@source '../node_modules/fumadocs-ui/dist/**/*.js';
+@source '../node_modules/fumadocs-openapi/dist/**/*.js';

docs/app/layout.tsx

@@ -0,0 +1,13 @@
+import { RootProvider } from 'fumadocs-ui/provider/next';
+import type { ReactNode } from 'react';
+import './global.css';
+
+export default function Layout({ children }: { children: ReactNode }) {
+  return (
+    <html lang="en" suppressHydrationWarning>
+      <body className="flex flex-col min-h-screen">
+        <RootProvider>{children}</RootProvider>
+      </body>
+    </html>
+  );
+}

docs/app/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Home() {
+  redirect('/docs');
+}