From bc73a02623c5cfa25f0add5a15bd931049660895 Mon Sep 17 00:00:00 2001
From: sudacode <suda@sudacode.com>
Date: Thu, 24 Sep 2026 15:28:58 -0700
Subject: [PATCH] ci(docs): serve frozen version archives from R2 (#269)

---
 .github/workflows/docs-pages.yml       |  28 ++-
 docs-site/.vitepress/config.ts         | 206 +--------------
 docs-site/README.md                    |  17 +-
 docs-site/archive-function.test.ts     | 116 +++++++++
 docs-site/development.md               |   4 +-
 docs-site/docs-sync.test.ts            |  10 -
 docs-site/functions/v/[[path]].ts      | 212 ++++++++++++++++
 docs-site/package.json                 |   4 +-
 docs-site/plausible.test.ts            |  18 +-
 docs-site/seo.test.ts                  | 336 ++-----------------------
 scripts/build-versioned-docs.ts        | 245 ++++++++----------
 scripts/docs-archive-store.ts          | 107 ++++++++
 scripts/docs-versioned-assets.test.ts  |  31 +--
 scripts/docs-versioned-assets.ts       |  27 --
 scripts/docs-versioning.test.ts        |  26 +-
 scripts/docs-versioning.ts             |  42 ++--
 scripts/print-docs-version-manifest.ts |  41 ---
 src/ci-workflow.test.ts                |  14 +-
 src/release-workflow.test.ts           |   2 +-
 19 files changed, 651 insertions(+), 835 deletions(-)
 create mode 100644 docs-site/archive-function.test.ts
 create mode 100644 docs-site/functions/v/[[path]].ts
 create mode 100644 scripts/docs-archive-store.ts
 delete mode 100644 scripts/print-docs-version-manifest.ts

diff --git a/.github/workflows/docs-pages.yml b/.github/workflows/docs-pages.yml
index e95f137d..477fa1d8 100644
--- a/.github/workflows/docs-pages.yml
+++ b/.github/workflows/docs-pages.yml
@@ -2,6 +2,11 @@ name: Docs Pages
 
 on:
   workflow_dispatch:
+    inputs:
+      rebuild_archives:
+        description: 'Stable tags to rebuild in R2 (comma-separated, or "all"); archives are otherwise built once'
+        required: false
+        default: ''
   push:
     branches:
       - main
@@ -10,6 +15,8 @@ on:
     paths:
       - 'docs-site/**'
       - 'scripts/docs-versioning.ts'
+      - 'scripts/docs-versioned-assets.ts'
+      - 'scripts/docs-archive-store.ts'
       - 'scripts/build-versioned-docs.ts'
       - '.github/workflows/docs-pages.yml'
       - 'package.json'
@@ -54,20 +61,21 @@ jobs:
           bun install --frozen-lockfile
           cd docs-site && bun install --frozen-lockfile
 
-      - name: Cache versioned docs archives
-        if: steps.tag_guard.outputs.stable_tag != 'false'
-        uses: actions/cache@v4
-        with:
-          path: .tmp/docs-versioned-archive-cache
-          key: docs-versioned-archives-${{ runner.os }}-${{ hashFiles('docs-site/.vitepress/**', 'docs-site/public/assets/fonts/**', 'docs-site/package.json', 'docs-site/bun.lock', 'scripts/build-versioned-docs.ts', 'scripts/docs-versioning.ts') }}
-
       - name: Test docs
         if: steps.tag_guard.outputs.stable_tag != 'false'
         run: bun run docs:test
 
+      # Builds only archives missing from R2 (plus any requested rebuilds), then the
+      # root and /main/ builds that make up the Pages deployment.
       - name: Build versioned docs
         if: steps.tag_guard.outputs.stable_tag != 'false'
-        run: bun run docs:build:versioned
+        env:
+          CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+          DOCS_ARCHIVE_R2_ACCESS_KEY_ID: ${{ secrets.DOCS_ARCHIVE_R2_ACCESS_KEY_ID }}
+          DOCS_ARCHIVE_R2_SECRET_ACCESS_KEY: ${{ secrets.DOCS_ARCHIVE_R2_SECRET_ACCESS_KEY }}
+          DOCS_ARCHIVE_R2_BUCKET: ${{ vars.DOCS_ARCHIVE_R2_BUCKET }}
+          REBUILD_ARCHIVES: ${{ inputs.rebuild_archives }}
+        run: bun run scripts/build-versioned-docs.ts --require-archives "--rebuild-archives=${REBUILD_ARCHIVES}"
 
       - name: Deploy docs to Cloudflare Pages
         if: steps.tag_guard.outputs.stable_tag != 'false'
@@ -75,4 +83,6 @@ jobs:
         with:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
-          command: pages deploy .tmp/docs-versioned-site --project-name "${{ vars.CLOUDFLARE_PAGES_PROJECT_NAME }}" --branch main
+          # Run from docs-site so Wrangler bundles docs-site/functions (the /v/* archive server).
+          workingDirectory: docs-site
+          command: pages deploy ../.tmp/docs-versioned-site --project-name "${{ vars.CLOUDFLARE_PAGES_PROJECT_NAME }}" --branch main
diff --git a/docs-site/.vitepress/config.ts b/docs-site/.vitepress/config.ts
index acace595..42795fd1 100644
--- a/docs-site/.vitepress/config.ts
+++ b/docs-site/.vitepress/config.ts
@@ -1,6 +1,6 @@
 import { spawnSync } from 'node:child_process';
-import { existsSync, readFileSync, statSync } from 'node:fs';
-import { extname, join, posix, resolve, sep } from 'node:path';
+import { existsSync } from 'node:fs';
+import { join } from 'node:path';
 import type { DefaultTheme, HeadConfig, TransformContext, UserConfig } from 'vitepress';
 
 const DOCS_HOSTNAME = 'https://docs.subminer.moe';
@@ -14,12 +14,6 @@ const PLAUSIBLE_INIT_SCRIPT = [
 
 type DocsChannel = 'stable-root' | 'stable-archive' | 'main';
 
-type VersionManifest = {
-  latestStable: string;
-  channels: Array<{ label: string; path: string }>;
-  versions: Array<{ version: string; path: string }>;
-};
-
 function optionalEnv(value: string | undefined): string | undefined {
   return value && value !== 'undefined' ? value : undefined;
 }
@@ -32,17 +26,6 @@ const docsSourceDir = optionalEnv(process.env.SUBMINER_DOCS_SOURCE_DIR) ?? proce
 const repoDocsDir = optionalEnv(process.env.SUBMINER_DOCS_REPO_DIR) ?? process.cwd();
 const channel = normalizeChannel(optionalEnv(process.env.SUBMINER_DOCS_CHANNEL));
 const docsVersion = optionalEnv(process.env.SUBMINER_DOCS_VERSION);
-const latestStable = optionalEnv(process.env.SUBMINER_DOCS_LATEST_STABLE) ?? 'v0.18.0';
-const versionManifest = parseVersionManifest(process.env.SUBMINER_DOCS_VERSION_MANIFEST);
-const versionLinkOrigin =
-  optionalEnv(process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN) ?? 'production';
-
-function getLocalArchiveDir(): string {
-  return resolve(
-    optionalEnv(process.env.SUBMINER_DOCS_LOCAL_ARCHIVE_DIR) ??
-      join(docsSourceDir, '..', '.tmp/docs-versioned-site'),
-  );
-}
 
 function normalizeBase(value: string): string {
   if (!value || value === '/') return '/';
@@ -54,21 +37,6 @@ function normalizeChannel(value: string | undefined): DocsChannel {
   return 'stable-root';
 }
 
-function parseVersionManifest(value: string | undefined): VersionManifest {
-  if (!value || value === 'undefined') {
-    return {
-      latestStable,
-      channels: [
-        { label: 'Latest stable', path: '/' },
-        { label: 'main', path: '/main/' },
-      ],
-      versions: [{ version: latestStable, path: `/v/${latestStable.replace(/^v/, '')}/` }],
-    };
-  }
-
-  return JSON.parse(value) as VersionManifest;
-}
-
 function withDocsBase(path: string): string {
   if (/^[a-z]+:\/\//i.test(path)) return path;
   const normalizedPath = path.startsWith('/') ? path : `/${path}`;
@@ -164,137 +132,16 @@ function filterSidebar(items: DefaultTheme.SidebarItem[]): DefaultTheme.SidebarI
     .filter((item): item is DefaultTheme.SidebarItem => Boolean(item));
 }
 
-function versionSwitchLink(path: string): string {
-  if (/^[a-z]+:\/\//i.test(path)) return path;
-  const normalizedPath = path.startsWith('/') ? path : `/${path}`;
-  if (versionLinkOrigin === 'local') return localVersionSwitchLink(normalizedPath);
-  return `${DOCS_HOSTNAME}${normalizedPath}`;
-}
-
-function localVersionSwitchLink(path: string): string {
-  if (base === '/') return path;
-
-  const basePath = base.replace(/\/$/, '');
-  const targetPath = path === '/' ? '/' : path.replace(/\/$/, '');
-  const relativePath = posix.relative(basePath, targetPath) || '.';
-
-  return path.endsWith('/') ? `${relativePath}/` : relativePath;
-}
-
-function shouldHandleLocalVersionRoute(pathname: string): boolean {
-  if (base !== '/' || channel !== 'stable-root') return false;
-  return /^\/main(?:\/|$)/.test(pathname) || /^\/v\/[^/]+(?:\/|$)/.test(pathname);
-}
-
-function contentTypeForPath(path: string): string {
-  switch (extname(path)) {
-    case '.css':
-      return 'text/css; charset=utf-8';
-    case '.gif':
-      return 'image/gif';
-    case '.ico':
-      return 'image/x-icon';
-    case '.jpg':
-    case '.jpeg':
-      return 'image/jpeg';
-    case '.js':
-    case '.mjs':
-      return 'text/javascript; charset=utf-8';
-    case '.json':
-    case '.jsonc':
-      return 'application/json; charset=utf-8';
-    case '.mp4':
-      return 'video/mp4';
-    case '.png':
-      return 'image/png';
-    case '.svg':
-      return 'image/svg+xml';
-    case '.ttf':
-      return 'font/ttf';
-    case '.webm':
-      return 'video/webm';
-    case '.woff':
-      return 'font/woff';
-    case '.woff2':
-      return 'font/woff2';
-    case '.xml':
-      return 'application/xml; charset=utf-8';
-    default:
-      return 'text/html; charset=utf-8';
-  }
-}
-
-function isFile(path: string): boolean {
-  try {
-    return statSync(path).isFile();
-  } catch {
-    return false;
-  }
-}
-
-function archiveFileForPathname(pathname: string): string | null {
-  if (!shouldHandleLocalVersionRoute(pathname)) return null;
-
-  const localArchiveDir = getLocalArchiveDir();
-  const routePath = decodeURIComponent(pathname).replace(/^\/+/, '');
-  const filePath = resolve(localArchiveDir, routePath);
-  if (filePath !== localArchiveDir && !filePath.startsWith(`${localArchiveDir}${sep}`)) {
-    return null;
-  }
-
-  const candidates = pathname.endsWith('/')
-    ? [join(filePath, 'index.html')]
-    : extname(filePath)
-      ? [filePath]
-      : [`${filePath}.html`, join(filePath, 'index.html')];
-
-  return candidates.find(isFile) ?? null;
-}
-
-function serveLocalArchiveRoute(pathname: string, response: DevServerResponse): boolean {
-  if (
-    (optionalEnv(process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN) ?? versionLinkOrigin) !== 'local'
-  ) {
-    return false;
-  }
-
-  const filePath = archiveFileForPathname(pathname);
-  if (!filePath) return false;
-
-  response.statusCode = 200;
-  response.setHeader('Content-Type', contentTypeForPath(filePath));
-  response.end(readFileSync(filePath));
-  return true;
-}
-
-type DevServerResponse = {
-  statusCode: number;
-  setHeader(name: string, value: string): void;
-  end(chunk?: string | Uint8Array): void;
-};
-
-const versionItems = [
-  {
-    text: `Latest stable (${versionManifest.latestStable})`,
-    link: versionSwitchLink('/'),
-    target: '_self',
-    noIcon: true,
-  },
-  ...versionManifest.channels
-    .filter((entry) => entry.label !== 'Latest stable')
-    .map((entry) => ({
-      text: entry.label,
-      link: versionSwitchLink(entry.path),
-      target: '_self',
-      noIcon: true,
-    })),
-  ...versionManifest.versions.map((entry) => ({
-    text: entry.version,
-    link: versionSwitchLink(entry.path),
-    target: '_self',
-    noIcon: true,
-  })),
-];
+// Version navigation targets other builds (root, `/main/`, `/versions`), so it links to
+// production by absolute URL: base-relative links would stay inside this build, and
+// `target: '_self'` makes the VitePress router do a full page load. The list is
+// deliberately static; the full release list lives on the root-only `/versions` page
+// so frozen `/v/<version>/` archives never need a rebuild when a new tag ships.
+const versionItems: DefaultTheme.NavItemWithLink[] = [
+  { text: 'Latest stable', link: `${DOCS_HOSTNAME}/` },
+  { text: 'main', link: `${DOCS_HOSTNAME}/main/` },
+  { text: 'All versions', link: `${DOCS_HOSTNAME}/versions` },
+].map((item) => ({ ...item, target: '_self', noIcon: true }));
 
 function sitemapUrlToPage(url: string): string {
   const route = url.replace(/\.html$/, '').replace(/^\/+|\/+$/g, '');
@@ -336,7 +183,7 @@ const nav: DefaultTheme.NavItem[] = [
   { text: 'Configuration', link: '/configuration' },
   { text: 'Changelog', link: '/changelog' },
   { text: 'Troubleshooting', link: '/troubleshooting' },
-  { text: docsVersion ?? (channel === 'main' ? 'main' : latestStable), items: versionItems },
+  { text: docsVersion ?? 'main', items: versionItems },
 ];
 
 const sidebar: DefaultTheme.SidebarItem[] = [
@@ -394,33 +241,6 @@ const config: UserConfig = {
     'SubMiner: an MPV immersion-mining overlay with Yomitan and AnkiConnect integration.',
   base,
   ...(outDir ? { outDir } : {}),
-  vite: {
-    plugins: [
-      {
-        name: 'subminer-docs-local-version-redirects',
-        configureServer(server) {
-          server.middlewares.use((request, response, next) => {
-            const requestUrl = new URL(request.url ?? '/', 'http://localhost');
-            if (serveLocalArchiveRoute(requestUrl.pathname, response)) {
-              return;
-            }
-
-            if (!shouldHandleLocalVersionRoute(requestUrl.pathname)) {
-              next();
-              return;
-            }
-
-            response.statusCode = 302;
-            response.setHeader(
-              'Location',
-              `${DOCS_HOSTNAME}${requestUrl.pathname}${requestUrl.search}`,
-            );
-            response.end();
-          });
-        },
-      },
-    ],
-  },
   head: [
     ['link', { rel: 'preconnect', href: PLAUSIBLE_PROXY_HOSTNAME }],
     [
diff --git a/docs-site/README.md b/docs-site/README.md
index 687452cb..85d0061c 100644
--- a/docs-site/README.md
+++ b/docs-site/README.md
@@ -40,8 +40,23 @@ The public docs root is stable-only:
 - `/` serves the latest stable release docs.
 - `/main/` serves development docs from `main`.
 - `/v/<version>/` serves stable release archives.
+- `/versions` (root build only) lists every published version.
 - Prerelease tags do not update the docs site.
 
-Only `/` is indexable. `/main/` and every `/v/<version>/` page carries a self-referential canonical plus `noindex,follow`, and the generated `_headers` file repeats that as an `X-Robots-Tag`. They stay crawlable so their links still resolve, but ~30 archived copies of every page would otherwise consume the crawl budget the current docs need. Only the root build emits `sitemap.xml`, and its `<lastmod>` dates come from `git log` against the tracked checkout at the released tag, because the build renders from an untracked snapshot that VitePress cannot date itself.
+Only `/` is indexable. `/main/` and every `/v/<version>/` page carries a self-referential canonical plus `noindex,follow`, repeated as an `X-Robots-Tag` header (by the generated `_headers` file for `/main/`, by the archive function for `/v/`). They stay crawlable so their links still resolve, but ~30 archived copies of every page would otherwise consume the crawl budget the current docs need. Only the root build emits `sitemap.xml`, and its `<lastmod>` dates come from `git log` against the tracked checkout at the released tag, because the build renders from an untracked snapshot that VitePress cannot date itself.
 
 Keep Cloudflare Git auto-deploy disabled. The production deploy is `.github/workflows/docs-pages.yml`, which uploads `.tmp/docs-versioned-site` with `--branch main` so tag-triggered runs update Production instead of creating preview deployments.
+
+### Stable archives in R2
+
+`/v/<version>/` archives are not part of the Pages deployment. Each one is built once, uploaded to an R2 bucket under `v/<version>/`, and served by the Pages Function in `functions/v/[[path]].ts`. Each deploy builds only archives the bucket is missing (an archive counts as present once its `_archive.json` marker exists), plus the root and `/main/` builds. Archive nav links to `/versions` instead of listing releases, so a new tag never invalidates old archives.
+
+To re-render archives on purpose (theme change, docs fix), run the `Docs Pages` workflow manually with `rebuild_archives` set to comma-separated tags or `all`.
+
+One-time setup:
+
+- R2 bucket for archives; its name goes in the `DOCS_ARCHIVE_R2_BUCKET` repository variable.
+- R2 API token with Object Read & Write on that bucket; its S3 credentials go in the `DOCS_ARCHIVE_R2_ACCESS_KEY_ID` and `DOCS_ARCHIVE_R2_SECRET_ACCESS_KEY` repository secrets.
+- Pages project: Settings > Bindings > R2 bucket, variable name `DOCS_ARCHIVES`, pointing at the same bucket.
+
+The first deploy after setup builds and uploads every stable archive; later deploys only add new tags.
diff --git a/docs-site/archive-function.test.ts b/docs-site/archive-function.test.ts
new file mode 100644
index 00000000..ddbcaecc
--- /dev/null
+++ b/docs-site/archive-function.test.ts
@@ -0,0 +1,116 @@
+import { expect, test } from 'bun:test';
+import { onRequest, resolveArchiveRoute, type ArchiveBucket } from './functions/v/[[path]]';
+
+// In-memory stand-in for the R2 binding, including the range and precondition behavior
+// the function relies on.
+function fakeBucket(objects: Record<string, string>): ArchiveBucket {
+  return {
+    async get(key, options) {
+      const content = objects[key];
+      if (content === undefined) return null;
+      const bytes = new TextEncoder().encode(content);
+      const httpEtag = `"${key}"`;
+
+      if (options?.onlyIf?.get('if-none-match') === httpEtag) {
+        return { size: bytes.length, httpEtag };
+      }
+
+      const rangeHeader = options?.range?.get('range');
+      const match = rangeHeader ? /^bytes=(\d+)-(\d*)$/.exec(rangeHeader) : null;
+      if (match) {
+        const offset = Number(match[1]);
+        const end = match[2] ? Number(match[2]) : bytes.length - 1;
+        const slice = bytes.slice(offset, end + 1);
+        return {
+          size: bytes.length,
+          httpEtag,
+          range: { offset, length: slice.length },
+          body: new Blob([slice]).stream(),
+        };
+      }
+
+      return { size: bytes.length, httpEtag, body: new Blob([bytes]).stream() };
+    },
+  };
+}
+
+const bucket = fakeBucket({
+  'v/0.19.6/index.html': '<h1>home</h1>',
+  'v/0.19.6/usage.html': '<h1>usage</h1>',
+  'v/0.19.6/404.html': '<h1>missing</h1>',
+  'v/0.19.6/assets/app.abc123.js': 'console.log(1)',
+});
+
+function request(path: string, init?: RequestInit) {
+  return onRequest({
+    request: new Request(`https://docs.subminer.moe${path}`, init),
+    env: { DOCS_ARCHIVES: bucket },
+  });
+}
+
+test('archive routes follow the clean-URL layout of the built archives', () => {
+  expect(resolveArchiveRoute('/v/0.19.6/usage')).toEqual({
+    kind: 'lookup',
+    version: '0.19.6',
+    keys: ['v/0.19.6/usage.html', 'v/0.19.6/usage/index.html'],
+  });
+  expect(resolveArchiveRoute('/v/0.19.6/')).toEqual({
+    kind: 'lookup',
+    version: '0.19.6',
+    keys: ['v/0.19.6/index.html'],
+  });
+  expect(resolveArchiveRoute('/v/0.19.6', '?q=1')).toEqual({
+    kind: 'redirect',
+    location: '/v/0.19.6/?q=1',
+    status: 301,
+  });
+  expect(resolveArchiveRoute('/v/')).toEqual({
+    kind: 'redirect',
+    location: '/versions',
+    status: 302,
+  });
+  expect(resolveArchiveRoute('/v/0.19.6/%2e%2e/secret')).toEqual({ kind: 'not-found' });
+  expect(resolveArchiveRoute('/v/latest/')).toEqual({ kind: 'not-found' });
+});
+
+test('serves archive pages and hashed assets with their cache policy', async () => {
+  const page = await request('/v/0.19.6/usage');
+  expect(page.status).toBe(200);
+  expect(page.headers.get('content-type')).toBe('text/html; charset=utf-8');
+  expect(page.headers.get('cache-control')).toBe('public, max-age=3600');
+  expect(page.headers.get('x-robots-tag')).toBe('noindex, follow');
+  expect(await page.text()).toBe('<h1>usage</h1>');
+
+  const asset = await request('/v/0.19.6/assets/app.abc123.js');
+  expect(asset.headers.get('content-type')).toBe('text/javascript; charset=utf-8');
+  expect(asset.headers.get('cache-control')).toContain('immutable');
+});
+
+test('missing archive pages fall back to the archive 404 page', async () => {
+  const response = await request('/v/0.19.6/nope');
+  expect(response.status).toBe(404);
+  expect(await response.text()).toBe('<h1>missing</h1>');
+
+  const unknownVersion = await request('/v/0.1.0/usage');
+  expect(unknownVersion.status).toBe(404);
+});
+
+test('supports byte ranges, conditional requests, and HEAD', async () => {
+  const partial = await request('/v/0.19.6/usage', { headers: { Range: 'bytes=4-8' } });
+  expect(partial.status).toBe(206);
+  expect(partial.headers.get('content-range')).toBe('bytes 4-8/14');
+  expect(await partial.text()).toBe('usage');
+
+  const notModified = await request('/v/0.19.6/usage', {
+    headers: { 'If-None-Match': '"v/0.19.6/usage.html"' },
+  });
+  expect(notModified.status).toBe(304);
+
+  const head = await request('/v/0.19.6/usage', { method: 'HEAD' });
+  expect(head.status).toBe(200);
+  expect(head.headers.get('content-length')).toBe('14');
+  expect(await head.text()).toBe('');
+
+  const post = await request('/v/0.19.6/usage', { method: 'POST' });
+  expect(post.status).toBe(405);
+});
diff --git a/docs-site/development.md b/docs-site/development.md
index 71a7a793..d4b795bc 100644
--- a/docs-site/development.md
+++ b/docs-site/development.md
@@ -127,7 +127,7 @@ For production docs routing, run the versioned build:
 bun run docs:build:versioned
 ```
 
-The versioned build writes `.tmp/docs-versioned-site` with latest stable docs at `/`, development docs at `/main/`, and stable archives under `/v/<version>/`. Prerelease tags are skipped. Public assets from `docs-site/public/assets` are shared from root `/assets/` so large demo media is not duplicated into every version archive; generated VitePress CSS and JS assets stay under each version route. Stale `.tmp/docs-versioned-archive-cache` generations are pruned after a successful build, and intermediate `.tmp/docs-versioned-build` workspaces are removed.
+The versioned build writes `.tmp/docs-versioned-site` with latest stable docs at `/` (plus a generated `/versions` page) and development docs at `/main/`. Prerelease tags are skipped. `/main/` shares public assets from root `/assets/` instead of duplicating them. Stable archives under `/v/<version>/` are built once and stored in R2 (see `docs-site/README.md`); without R2 credentials the build skips archive sync, so local runs only produce the root and `/main/` trees.
 
 Focused commands:
 
@@ -192,7 +192,7 @@ From the SubMiner app repo:
 
 ```bash
 bun --cwd docs-site install
-bun run docs:dev     # Dev server at http://localhost:5173
+bun run docs:dev     # Dev server at http://localhost:5173 (version links go to production)
 bun run docs:build   # Production build into docs-site/.vitepress/dist
 bun run docs:preview # Preview built site at http://localhost:4173
 bun run docs:test    # Docs regression tests
diff --git a/docs-site/docs-sync.test.ts b/docs-site/docs-sync.test.ts
index 35e8e2a1..89065610 100644
--- a/docs-site/docs-sync.test.ts
+++ b/docs-site/docs-sync.test.ts
@@ -8,7 +8,6 @@ const installationContents = readFileSync(new URL('./installation.md', import.me
 const mpvPluginContents = readFileSync(new URL('./mpv-plugin.md', import.meta.url), 'utf8');
 const developmentContents = readFileSync(new URL('./development.md', import.meta.url), 'utf8');
 const changelogContents = readFileSync(new URL('./changelog.md', import.meta.url), 'utf8');
-const docsPackageContents = readFileSync(new URL('./package.json', import.meta.url), 'utf8');
 const ankiIntegrationContents = readFileSync(
   new URL('./anki-integration.md', import.meta.url),
   'utf8',
@@ -101,15 +100,6 @@ test('docs state the real secondary-subtitle and Anki field-matching behavior',
   expect(ankiIntegrationContents).toContain('case-insensitively');
 });
 
-test('docs dev server links version navigation to local dev routes', () => {
-  expect(docsPackageContents).toContain('scripts/build-versioned-docs.ts');
-  expect(docsPackageContents).toContain(
-    'SUBMINER_DOCS_VERSION_LINK_ORIGIN=local bun run ../scripts/build-versioned-docs.ts',
-  );
-  expect(docsPackageContents).toContain('SUBMINER_DOCS_VERSION_LINK_ORIGIN=local');
-  expect(docsPackageContents).toContain('SUBMINER_DOCS_VERSION_MANIFEST');
-});
-
 test('docs changelog keeps the current minor release headings aligned with the root changelog', () => {
   const docsHeadings = extractCurrentMinorHeadings(changelogContents);
   expect(docsHeadings.length).toBeGreaterThan(0);
diff --git a/docs-site/functions/v/[[path]].ts b/docs-site/functions/v/[[path]].ts
new file mode 100644
index 00000000..11ff5e7a
--- /dev/null
+++ b/docs-site/functions/v/[[path]].ts
@@ -0,0 +1,212 @@
+// Cloudflare Pages Function serving frozen `/v/<version>/` doc archives from R2.
+// Archives are uploaded by scripts/build-versioned-docs.ts and never ship in the Pages
+// deployment itself, so they do not count toward the Pages file limit. Requires an R2
+// binding named DOCS_ARCHIVES on the Pages project (see docs-site/README.md).
+
+// Minimal slice of the Workers R2 API used here; avoids a workers-types dependency.
+type R2Range = { offset: number; length?: number } | { suffix: number };
+
+type R2ObjectMeta = {
+  size: number;
+  httpEtag: string;
+  range?: R2Range;
+};
+
+type R2ObjectBody = R2ObjectMeta & { body: ReadableStream };
+
+type R2GetOptions = { range?: Headers; onlyIf?: Headers };
+
+export type ArchiveBucket = {
+  get(key: string, options?: R2GetOptions): Promise<R2ObjectMeta | R2ObjectBody | null>;
+};
+
+type ArchiveContext = {
+  request: Request;
+  env: { DOCS_ARCHIVES: ArchiveBucket };
+};
+
+export type ArchiveRoute =
+  | { kind: 'redirect'; location: string; status: 301 | 302 }
+  | { kind: 'lookup'; version: string; keys: string[] }
+  | { kind: 'not-found' };
+
+const CONTENT_TYPES: Record<string, string> = {
+  css: 'text/css; charset=utf-8',
+  gif: 'image/gif',
+  html: 'text/html; charset=utf-8',
+  ico: 'image/x-icon',
+  jpeg: 'image/jpeg',
+  jpg: 'image/jpeg',
+  js: 'text/javascript; charset=utf-8',
+  json: 'application/json; charset=utf-8',
+  jsonc: 'application/json; charset=utf-8',
+  mjs: 'text/javascript; charset=utf-8',
+  mkv: 'video/x-matroska',
+  mp4: 'video/mp4',
+  png: 'image/png',
+  svg: 'image/svg+xml',
+  ttf: 'font/ttf',
+  txt: 'text/plain; charset=utf-8',
+  webm: 'video/webm',
+  webp: 'image/webp',
+  woff: 'font/woff',
+  woff2: 'font/woff2',
+  xml: 'application/xml; charset=utf-8',
+};
+
+function extensionOf(path: string): string | null {
+  const name = path.slice(path.lastIndexOf('/') + 1);
+  const dot = name.lastIndexOf('.');
+  return dot > 0 ? name.slice(dot + 1).toLowerCase() : null;
+}
+
+function contentTypeFor(key: string): string {
+  return CONTENT_TYPES[extensionOf(key) ?? ''] ?? 'application/octet-stream';
+}
+
+// Maps a request path onto candidate R2 keys, mirroring the Pages clean-URL rules the
+// archives were built for (`cleanUrls: true`).
+export function resolveArchiveRoute(pathname: string, search = ''): ArchiveRoute {
+  if (pathname === '/v' || pathname === '/v/') {
+    return { kind: 'redirect', location: '/versions', status: 302 };
+  }
+
+  const match = /^\/v\/(\d+\.\d+\.\d+)(\/.*)?$/.exec(pathname);
+  if (!match) return { kind: 'not-found' };
+
+  const version = match[1]!;
+  const rest = match[2];
+  if (!rest) {
+    return { kind: 'redirect', location: `/v/${version}/${search}`, status: 301 };
+  }
+
+  let decoded: string;
+  try {
+    decoded = decodeURIComponent(rest);
+  } catch {
+    return { kind: 'not-found' };
+  }
+  if (decoded.split('/').some((segment) => segment === '..' || segment === '.')) {
+    return { kind: 'not-found' };
+  }
+
+  const prefix = `v/${version}`;
+  const path = `${prefix}${decoded}`;
+  const keys = decoded.endsWith('/')
+    ? [`${path}index.html`]
+    : extensionOf(decoded)
+      ? [path]
+      : [`${path}.html`, `${path}/index.html`];
+
+  return { kind: 'lookup', version, keys };
+}
+
+function cacheControlFor(key: string): string {
+  // VitePress content-hashes everything it emits under assets/.
+  if (/\/assets\//.test(key) && extensionOf(key) !== 'html') {
+    return 'public, max-age=31536000, immutable';
+  }
+  return 'public, max-age=3600';
+}
+
+function hasBody(object: R2ObjectMeta | R2ObjectBody): object is R2ObjectBody {
+  return 'body' in object && object.body !== undefined;
+}
+
+function contentRange(range: R2Range, size: number): { start: number; end: number } {
+  if ('suffix' in range) {
+    const length = Math.min(range.suffix, size);
+    return { start: size - length, end: size - 1 };
+  }
+  const length = range.length ?? size - range.offset;
+  return { start: range.offset, end: range.offset + length - 1 };
+}
+
+async function respondWithObject(options: {
+  request: Request;
+  bucket: ArchiveBucket;
+  key: string;
+  status: number;
+}): Promise<Response | null> {
+  const { request, bucket, key } = options;
+  // Ranges and conditional requests only make sense for the page that was asked for,
+  // not the 404 fallback.
+  const isRequestedObject = options.status === 200;
+  const wantsRange = isRequestedObject && request.headers.has('range');
+
+  let object: R2ObjectMeta | R2ObjectBody | null;
+  try {
+    object = await bucket.get(key, {
+      range: wantsRange ? request.headers : undefined,
+      onlyIf: isRequestedObject ? request.headers : undefined,
+    });
+  } catch {
+    // R2 rejects unsatisfiable ranges.
+    return new Response(null, { status: 416 });
+  }
+  if (!object) return null;
+
+  const headers = new Headers({
+    'Content-Type': contentTypeFor(key),
+    'Cache-Control': cacheControlFor(key),
+    ETag: object.httpEtag,
+    'Accept-Ranges': 'bytes',
+    'X-Robots-Tag': 'noindex, follow',
+  });
+
+  // R2 returns the object without a body when an If-None-Match/If-Modified-Since
+  // precondition matched.
+  if (!hasBody(object)) {
+    return new Response(null, { status: 304, headers });
+  }
+
+  let status = options.status;
+  if (wantsRange && object.range) {
+    const { start, end } = contentRange(object.range, object.size);
+    status = 206;
+    headers.set('Content-Range', `bytes ${start}-${end}/${object.size}`);
+    headers.set('Content-Length', String(end - start + 1));
+  } else {
+    headers.set('Content-Length', String(object.size));
+  }
+
+  return new Response(request.method === 'HEAD' ? null : object.body, { status, headers });
+}
+
+export async function onRequest({ request, env }: ArchiveContext): Promise<Response> {
+  if (request.method !== 'GET' && request.method !== 'HEAD') {
+    return new Response('Method Not Allowed', { status: 405, headers: { Allow: 'GET, HEAD' } });
+  }
+
+  const url = new URL(request.url);
+  const route = resolveArchiveRoute(url.pathname, url.search);
+
+  if (route.kind === 'redirect') {
+    return Response.redirect(new URL(route.location, url).toString(), route.status);
+  }
+
+  if (route.kind === 'lookup') {
+    for (const key of route.keys) {
+      const response = await respondWithObject({
+        request,
+        bucket: env.DOCS_ARCHIVES,
+        key,
+        status: 200,
+      });
+      if (response) return response;
+    }
+
+    const notFoundPage = await respondWithObject({
+      request,
+      bucket: env.DOCS_ARCHIVES,
+      key: `v/${route.version}/404.html`,
+      status: 404,
+    });
+    if (notFoundPage) return notFoundPage;
+  }
+
+  return new Response('Not Found', {
+    status: 404,
+    headers: { 'Content-Type': 'text/plain; charset=utf-8', 'X-Robots-Tag': 'noindex, follow' },
+  });
+}
diff --git a/docs-site/package.json b/docs-site/package.json
index 747f333d..83a425e5 100644
--- a/docs-site/package.json
+++ b/docs-site/package.json
@@ -5,10 +5,10 @@
   "description": "In-repo VitePress documentation site for SubMiner",
   "packageManager": "bun@1.3.5",
   "scripts": {
-    "docs:dev": "SUBMINER_DOCS_VERSION_LINK_ORIGIN=local bun run ../scripts/build-versioned-docs.ts && SUBMINER_DOCS_VERSION_LINK_ORIGIN=local SUBMINER_DOCS_VERSION_MANIFEST=\"$(bun run ../scripts/print-docs-version-manifest.ts)\" VITE_EXTRA_EXTENSIONS=jsonc vitepress dev --host 0.0.0.0 --port 5173 --strictPort",
+    "docs:dev": "VITE_EXTRA_EXTENSIONS=jsonc vitepress dev --host 0.0.0.0 --port 5173 --strictPort",
     "docs:build": "VITE_EXTRA_EXTENSIONS=jsonc vitepress build",
     "docs:preview": "VITE_EXTRA_EXTENSIONS=jsonc vitepress preview --host 0.0.0.0 --port 4173 --strictPort",
-    "test": "bun test plausible.test.ts index.assets.test.ts docs-sync.test.ts links.test.ts seo.test.ts .vitepress/theme/status-line.test.ts ../scripts/docs-versioning.test.ts"
+    "test": "bun test plausible.test.ts index.assets.test.ts archive-function.test.ts docs-sync.test.ts links.test.ts seo.test.ts .vitepress/theme/status-line.test.ts ../scripts/docs-versioning.test.ts"
   },
   "dependencies": {
     "@catppuccin/vitepress": "^0.1.2",
diff --git a/docs-site/plausible.test.ts b/docs-site/plausible.test.ts
index 25cbb2b2..905d0c5b 100644
--- a/docs-site/plausible.test.ts
+++ b/docs-site/plausible.test.ts
@@ -42,27 +42,11 @@ test('versioned docs reuse current VitePress internals for old page snapshots',
   expect(versionedBuildContents).toContain('overlayCurrentVitePress(snapshotDocsSite)');
 });
 
-test('versioned docs build reports archive cache hits and rebuilds', () => {
-  expect(versionedBuildContents).toContain(
-    'console.info(`[docs] archive cache key ${archiveCacheKey.slice(0, 12)}`)',
-  );
-  expect(versionedBuildContents).toContain('console.info(`[docs] cache hit ${version}`)');
-  expect(versionedBuildContents).toContain('console.info(`[docs] rebuilding archive ${version}`)');
-});
-
-test('versioned docs build deduplicates public assets and prunes stale workspaces', () => {
+test('versioned docs build deduplicates main public assets and removes build workspaces', () => {
   expect(versionedBuildContents).toContain('dedupeVersionedPublicAssets({');
-  expect(versionedBuildContents).toContain('pruneArchiveCacheGenerations({');
   expect(versionedBuildContents).toContain('rmSync(buildRoot, { recursive: true, force: true });');
 });
 
-test('versioned docs archive cache key ignores generated and test-only files', () => {
-  expect(versionedBuildContents).toContain('isSharedInternalsHashIgnoredPath(path)');
-  expect(versionedBuildContents).toContain('|| /\\.test\\.[cm]?[jt]s$/.test(path)');
-  expect(versionedBuildContents).toContain('process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN');
-  expect(versionedBuildContents).not.toContain('hash.update(String(stat.mode))');
-});
-
 test('docs builds exclude the internal README from VitePress page entries', () => {
   expect(docsConfigContents).toContain("srcExclude: ['subagents/**', 'README.md']");
 });
diff --git a/docs-site/seo.test.ts b/docs-site/seo.test.ts
index 99980516..9b682fe0 100644
--- a/docs-site/seo.test.ts
+++ b/docs-site/seo.test.ts
@@ -1,7 +1,4 @@
 import { expect, test } from 'bun:test';
-import { mkdirSync, mkdtempSync, rmSync, writeFileSync } from 'node:fs';
-import { tmpdir } from 'node:os';
-import { join } from 'node:path';
 import { fileURLToPath } from 'node:url';
 import type { TransformContext } from 'vitepress';
 import docsConfig from './.vitepress/config';
@@ -63,19 +60,17 @@ test('main docs canonical uses /main/ and emits noindex', async () => {
 });
 
 test.each([
-  ['latest stable', 'v0.14.0', '/v/0.14.0/', 'https://docs.subminer.moe/v/0.14.0/usage'],
-  ['superseded', 'v0.12.0', '/v/0.12.0/', 'https://docs.subminer.moe/v/0.12.0/usage'],
+  ['v0.14.0', '/v/0.14.0/', 'https://docs.subminer.moe/v/0.14.0/usage'],
+  ['v0.12.0', '/v/0.12.0/', 'https://docs.subminer.moe/v/0.12.0/usage'],
 ])(
   '%s archive keeps a self-referential canonical and stays out of the index',
-  async (_label, version, base, expectedCanonical) => {
+  async (version, base, expectedCanonical) => {
     const previousChannel = process.env.SUBMINER_DOCS_CHANNEL;
     const previousBase = process.env.SUBMINER_DOCS_BASE;
     const previousVersion = process.env.SUBMINER_DOCS_VERSION;
-    const previousLatest = process.env.SUBMINER_DOCS_LATEST_STABLE;
     process.env.SUBMINER_DOCS_CHANNEL = 'stable-archive';
     process.env.SUBMINER_DOCS_BASE = base;
     process.env.SUBMINER_DOCS_VERSION = version;
-    process.env.SUBMINER_DOCS_LATEST_STABLE = 'v0.14.0';
     try {
       const { default: archiveConfig } = await import(`./.vitepress/config?archive-${version}`);
 
@@ -89,36 +84,19 @@ test.each([
       process.env.SUBMINER_DOCS_CHANNEL = previousChannel;
       process.env.SUBMINER_DOCS_BASE = previousBase;
       process.env.SUBMINER_DOCS_VERSION = previousVersion;
-      process.env.SUBMINER_DOCS_LATEST_STABLE = previousLatest;
     }
   },
 );
 
-test('stable archive theme links stay on the selected version', async () => {
+test('archive nav keeps page links in-version and version links release-independent', async () => {
   const previousCwd = process.cwd();
   const previousChannel = process.env.SUBMINER_DOCS_CHANNEL;
   const previousBase = process.env.SUBMINER_DOCS_BASE;
   const previousVersion = process.env.SUBMINER_DOCS_VERSION;
-  const previousLatest = process.env.SUBMINER_DOCS_LATEST_STABLE;
-  const previousManifest = process.env.SUBMINER_DOCS_VERSION_MANIFEST;
-  const previousVersionLinkOrigin = process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN;
   process.chdir(docsSiteDir);
   process.env.SUBMINER_DOCS_CHANNEL = 'stable-archive';
   process.env.SUBMINER_DOCS_BASE = '/v/0.12.0/';
   process.env.SUBMINER_DOCS_VERSION = 'v0.12.0';
-  process.env.SUBMINER_DOCS_LATEST_STABLE = 'v0.14.0';
-  process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN = 'production';
-  process.env.SUBMINER_DOCS_VERSION_MANIFEST = JSON.stringify({
-    latestStable: 'v0.14.0',
-    channels: [
-      { label: 'Latest stable', path: '/' },
-      { label: 'main', path: '/main/' },
-    ],
-    versions: [
-      { version: 'v0.14.0', path: '/v/0.14.0/' },
-      { version: 'v0.12.0', path: '/v/0.12.0/' },
-    ],
-  });
   try {
     const { default: archiveConfig } = await import('./.vitepress/config?stable-archive-links');
 
@@ -131,39 +109,24 @@ test('stable archive theme links stay on the selected version', async () => {
       text: string;
       items?: Array<{ text: string; link: string }>;
     }>;
-    const configurationNav = nav.find((item) => item.text === 'Configuration');
-    const versionNav = nav.find((item) => item.text === 'v0.12.0');
-    const referenceSidebar = sidebar.find((item) => item.text === 'Reference');
-    const configurationSidebar = referenceSidebar?.items?.find(
-      (item) => item.text === 'Configuration',
-    );
+    const configurationSidebar = sidebar
+      .find((item) => item.text === 'Reference')
+      ?.items?.find((item) => item.text === 'Configuration');
 
-    expect(configurationNav?.link).toBe('/configuration');
+    expect(nav.find((item) => item.text === 'Configuration')?.link).toBe('/configuration');
     expect(configurationSidebar?.link).toBe('/configuration');
-    expect(versionNav?.items).toContainEqual({
-      text: 'Latest stable (v0.14.0)',
-      link: 'https://docs.subminer.moe/',
-      target: '_self',
-      noIcon: true,
-    });
-    expect(versionNav?.items).toContainEqual({
-      text: 'main',
-      link: 'https://docs.subminer.moe/main/',
-      target: '_self',
-      noIcon: true,
-    });
-    expect(versionNav?.items).toContainEqual({
-      text: 'v0.14.0',
-      link: 'https://docs.subminer.moe/v/0.14.0/',
-      target: '_self',
-      noIcon: true,
-    });
-    expect(versionNav?.items).toContainEqual({
-      text: 'v0.12.0',
-      link: 'https://docs.subminer.moe/v/0.12.0/',
-      target: '_self',
-      noIcon: true,
-    });
+    // Frozen archives must not embed the release list, or every new tag would
+    // invalidate them. They point at the root-only /versions page instead.
+    expect(nav.find((item) => item.text === 'v0.12.0')?.items).toEqual([
+      { text: 'Latest stable', link: 'https://docs.subminer.moe/', target: '_self', noIcon: true },
+      { text: 'main', link: 'https://docs.subminer.moe/main/', target: '_self', noIcon: true },
+      {
+        text: 'All versions',
+        link: 'https://docs.subminer.moe/versions',
+        target: '_self',
+        noIcon: true,
+      },
+    ]);
     expect(archiveConfig.themeConfig?.logo).toEqual({
       light: '/assets/SubMiner.png',
       dark: '/assets/SubMiner.png',
@@ -173,268 +136,9 @@ test('stable archive theme links stay on the selected version', async () => {
     process.env.SUBMINER_DOCS_CHANNEL = previousChannel;
     process.env.SUBMINER_DOCS_BASE = previousBase;
     process.env.SUBMINER_DOCS_VERSION = previousVersion;
-    process.env.SUBMINER_DOCS_LATEST_STABLE = previousLatest;
-    process.env.SUBMINER_DOCS_VERSION_MANIFEST = previousManifest;
-    process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN = previousVersionLinkOrigin;
   }
 });
 
-test('local stable archive version links stay on the dev server', async () => {
-  const previousCwd = process.cwd();
-  const previousChannel = process.env.SUBMINER_DOCS_CHANNEL;
-  const previousBase = process.env.SUBMINER_DOCS_BASE;
-  const previousVersion = process.env.SUBMINER_DOCS_VERSION;
-  const previousLatest = process.env.SUBMINER_DOCS_LATEST_STABLE;
-  const previousManifest = process.env.SUBMINER_DOCS_VERSION_MANIFEST;
-  const previousVersionLinkOrigin = process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN;
-  process.chdir(docsSiteDir);
-  process.env.SUBMINER_DOCS_CHANNEL = 'stable-archive';
-  process.env.SUBMINER_DOCS_BASE = '/v/0.10.0/';
-  process.env.SUBMINER_DOCS_VERSION = 'v0.10.0';
-  process.env.SUBMINER_DOCS_LATEST_STABLE = 'v0.14.0';
-  process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN = 'local';
-  process.env.SUBMINER_DOCS_VERSION_MANIFEST = JSON.stringify({
-    latestStable: 'v0.14.0',
-    channels: [
-      { label: 'Latest stable', path: '/' },
-      { label: 'main', path: '/main/' },
-    ],
-    versions: [
-      { version: 'v0.14.0', path: '/v/0.14.0/' },
-      { version: 'v0.10.0', path: '/v/0.10.0/' },
-    ],
-  });
-  try {
-    const { default: archiveConfig } = await import('./.vitepress/config?local-archive-links');
-
-    const nav = archiveConfig.themeConfig?.nav as Array<{
-      text: string;
-      items?: Array<{ text: string; link: string }>;
-    }>;
-    const versionNav = nav.find((item) => item.text === 'v0.10.0');
-
-    expect(versionNav?.items).toContainEqual({
-      text: 'Latest stable (v0.14.0)',
-      link: '../../',
-      target: '_self',
-      noIcon: true,
-    });
-    expect(versionNav?.items).toContainEqual({
-      text: 'main',
-      link: '../../main/',
-      target: '_self',
-      noIcon: true,
-    });
-    expect(versionNav?.items).toContainEqual({
-      text: 'v0.14.0',
-      link: '../0.14.0/',
-      target: '_self',
-      noIcon: true,
-    });
-    expect(versionNav?.items).toContainEqual({
-      text: 'v0.10.0',
-      link: './',
-      target: '_self',
-      noIcon: true,
-    });
-  } finally {
-    process.chdir(previousCwd);
-    process.env.SUBMINER_DOCS_CHANNEL = previousChannel;
-    process.env.SUBMINER_DOCS_BASE = previousBase;
-    process.env.SUBMINER_DOCS_VERSION = previousVersion;
-    process.env.SUBMINER_DOCS_LATEST_STABLE = previousLatest;
-    process.env.SUBMINER_DOCS_VERSION_MANIFEST = previousManifest;
-    process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN = previousVersionLinkOrigin;
-  }
-});
-
-test('dev docs version links use local targets for version route testing', async () => {
-  const previousCwd = process.cwd();
-  const previousChannel = process.env.SUBMINER_DOCS_CHANNEL;
-  const previousBase = process.env.SUBMINER_DOCS_BASE;
-  const previousVersion = process.env.SUBMINER_DOCS_VERSION;
-  const previousLatest = process.env.SUBMINER_DOCS_LATEST_STABLE;
-  const previousManifest = process.env.SUBMINER_DOCS_VERSION_MANIFEST;
-  const previousVersionLinkOrigin = process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN;
-  process.chdir(docsSiteDir);
-  delete process.env.SUBMINER_DOCS_CHANNEL;
-  delete process.env.SUBMINER_DOCS_BASE;
-  delete process.env.SUBMINER_DOCS_VERSION;
-  // Set explicitly (like the sibling version-nav tests) so this assertion stays
-  // pinned to the manifest under test instead of the config's fallback constant.
-  process.env.SUBMINER_DOCS_LATEST_STABLE = 'v0.14.0';
-  process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN = 'local';
-  process.env.SUBMINER_DOCS_VERSION_MANIFEST = JSON.stringify({
-    latestStable: 'v0.14.0',
-    channels: [
-      { label: 'Latest stable', path: '/' },
-      { label: 'main', path: '/main/' },
-    ],
-    versions: [
-      { version: 'v0.14.0', path: '/v/0.14.0/' },
-      { version: 'v0.12.0', path: '/v/0.12.0/' },
-      { version: 'v0.11.2', path: '/v/0.11.2/' },
-    ],
-  });
-  try {
-    const { default: devConfig } = await import('./.vitepress/config?dev-version-links');
-
-    const nav = devConfig.themeConfig?.nav as Array<{
-      text: string;
-      items?: Array<{ text: string; link: string }>;
-    }>;
-    const versionNav = nav.find((item) => item.text === 'v0.14.0');
-
-    expect(versionNav?.items).toContainEqual({
-      text: 'Latest stable (v0.14.0)',
-      link: '/',
-      target: '_self',
-      noIcon: true,
-    });
-    expect(versionNav?.items).toContainEqual({
-      text: 'main',
-      link: '/main/',
-      target: '_self',
-      noIcon: true,
-    });
-    expect(versionNav?.items).toContainEqual({
-      text: 'v0.12.0',
-      link: '/v/0.12.0/',
-      target: '_self',
-      noIcon: true,
-    });
-    expect(versionNav?.items?.map((item) => item.text)).toEqual([
-      'Latest stable (v0.14.0)',
-      'main',
-      'v0.14.0',
-      'v0.12.0',
-      'v0.11.2',
-    ]);
-  } finally {
-    process.chdir(previousCwd);
-    process.env.SUBMINER_DOCS_CHANNEL = previousChannel;
-    process.env.SUBMINER_DOCS_BASE = previousBase;
-    process.env.SUBMINER_DOCS_VERSION = previousVersion;
-    process.env.SUBMINER_DOCS_LATEST_STABLE = previousLatest;
-    process.env.SUBMINER_DOCS_VERSION_MANIFEST = previousManifest;
-    process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN = previousVersionLinkOrigin;
-  }
-});
-
-test('dev server redirects unserved version routes to production docs', () => {
-  let routeHandler:
-    | ((req: { url?: string }, res: DevRedirectResponse, next: () => void) => void)
-    | undefined;
-  const fakeServer = {
-    middlewares: {
-      use(handler: typeof routeHandler) {
-        routeHandler = handler;
-      },
-    },
-  };
-  const plugins = Array.isArray(docsConfig.vite?.plugins)
-    ? docsConfig.vite.plugins
-    : [docsConfig.vite?.plugins].filter(Boolean);
-  const redirectPlugin = plugins.find(
-    (plugin): plugin is { name: string; configureServer: (server: never) => void } =>
-      Boolean(plugin) &&
-      typeof plugin === 'object' &&
-      'name' in plugin &&
-      plugin.name === 'subminer-docs-local-version-redirects' &&
-      'configureServer' in plugin,
-  );
-  expect(redirectPlugin).toBeDefined();
-  redirectPlugin?.configureServer(fakeServer as never);
-
-  const response = new DevRedirectResponse();
-  let nextCalled = false;
-  routeHandler?.({ url: '/v/0.14.0/?from=dev' }, response, () => {
-    nextCalled = true;
-  });
-
-  expect(nextCalled).toBe(false);
-  expect(response.statusCode).toBe(302);
-  expect(response.headers.location).toBe('https://docs.subminer.moe/v/0.14.0/?from=dev');
-
-  const rootResponse = new DevRedirectResponse();
-  routeHandler?.({ url: '/configuration' }, rootResponse, () => {
-    nextCalled = true;
-  });
-  expect(rootResponse.ended).toBe(false);
-  expect(nextCalled).toBe(true);
-});
-
-test('dev server serves local archive files for local version links', async () => {
-  const previousVersionLinkOrigin = process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN;
-  const previousArchiveDir = process.env.SUBMINER_DOCS_LOCAL_ARCHIVE_DIR;
-  const archiveDir = mkdtempSync(join(tmpdir(), 'subminer-docs-archive-'));
-  mkdirSync(join(archiveDir, 'v/0.14.0'), { recursive: true });
-  writeFileSync(join(archiveDir, 'v/0.14.0/index.html'), '<h1>local archive</h1>');
-  process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN = 'local';
-  process.env.SUBMINER_DOCS_LOCAL_ARCHIVE_DIR = archiveDir;
-  try {
-    const { default: localDevConfig } = await import(
-      `./.vitepress/config?local-dev-redirects-${Date.now()}`
-    );
-    let routeHandler:
-      | ((req: { url?: string }, res: DevRedirectResponse, next: () => void) => void)
-      | undefined;
-    const fakeServer = {
-      middlewares: {
-        use(handler: typeof routeHandler) {
-          routeHandler = handler;
-        },
-      },
-    };
-    const plugins = Array.isArray(localDevConfig.vite?.plugins)
-      ? localDevConfig.vite.plugins
-      : [localDevConfig.vite?.plugins].filter(Boolean);
-    const redirectPlugin = plugins.find(
-      (plugin): plugin is { name: string; configureServer: (server: never) => void } =>
-        Boolean(plugin) &&
-        typeof plugin === 'object' &&
-        'name' in plugin &&
-        plugin.name === 'subminer-docs-local-version-redirects' &&
-        'configureServer' in plugin,
-    );
-    redirectPlugin?.configureServer(fakeServer as never);
-
-    const response = new DevRedirectResponse();
-    let nextCalled = false;
-    routeHandler?.({ url: '/v/0.14.0/?from=dev' }, response, () => {
-      nextCalled = true;
-    });
-
-    expect(nextCalled).toBe(false);
-    expect(response.statusCode).toBe(200);
-    expect(response.headers['content-type']).toBe('text/html; charset=utf-8');
-    expect(response.headers.location).toBeUndefined();
-    expect(response.body).toBe('<h1>local archive</h1>');
-  } finally {
-    process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN = previousVersionLinkOrigin;
-    process.env.SUBMINER_DOCS_LOCAL_ARCHIVE_DIR = previousArchiveDir;
-    rmSync(archiveDir, { recursive: true, force: true });
-  }
-});
-
-class DevRedirectResponse {
-  statusCode = 200;
-  headers: Record<string, string> = {};
-  ended = false;
-  body = '';
-
-  setHeader(name: string, value: string) {
-    this.headers[name.toLowerCase()] = value;
-  }
-
-  end(chunk?: string | Uint8Array) {
-    if (chunk) {
-      this.body = typeof chunk === 'string' ? chunk : new TextDecoder().decode(chunk);
-    }
-    this.ended = true;
-  }
-}
-
 test('docs sitemap excludes duplicate README page from indexable URLs', async () => {
   const items = [{ url: '' }, { url: 'README' }, { url: 'usage' }];
 
diff --git a/scripts/build-versioned-docs.ts b/scripts/build-versioned-docs.ts
index 012de33f..a6bbf24f 100644
--- a/scripts/build-versioned-docs.ts
+++ b/scripts/build-versioned-docs.ts
@@ -1,49 +1,52 @@
 import { spawnSync } from 'node:child_process';
-import { createHash } from 'node:crypto';
 import {
   cpSync,
   existsSync,
   lstatSync,
   mkdirSync,
-  readFileSync,
   readdirSync,
-  readlinkSync,
   rmSync,
   symlinkSync,
   writeFileSync,
 } from 'node:fs';
 import { join, resolve } from 'node:path';
 import {
-  collectSharedAssetPaths,
-  dedupeVersionedPublicAssets,
-  pruneArchiveCacheGenerations,
-} from './docs-versioned-assets';
+  archiveStoreEnvFromProcess,
+  createArchiveStore,
+  type DocsArchiveStore,
+} from './docs-archive-store';
+import { collectSharedAssetPaths, dedupeVersionedPublicAssets } from './docs-versioned-assets';
 import {
   buildVersionManifest,
+  renderVersionsPage,
   stableTagsWithDocs,
-  versionArchiveCacheKey,
-  versionArchiveCacheName,
   versionOutputPath,
   versionPath,
 } from './docs-versioning';
 
+// Assembles the Cloudflare Pages deployment: latest stable at `/` and development docs
+// at `/main/`. Stable archives under `/v/<version>/` are built once, uploaded to R2, and
+// never rebuilt unless requested; this script only fills in archives R2 is missing.
+//
+// Flags:
+//   --require-archives           fail instead of skipping archive sync without R2 credentials
+//   --rebuild-archives=<list>    comma-separated tags (or `all`) to rebuild even if present
+
 const repoRoot = resolve(__dirname, '..');
 const currentDocsSite = join(repoRoot, 'docs-site');
 const buildRoot = join(repoRoot, '.tmp/docs-versioned-build');
 const aggregateOutDir = join(repoRoot, '.tmp/docs-versioned-site');
-const archiveCacheRoot = join(repoRoot, '.tmp/docs-versioned-archive-cache');
+const archiveOutRoot = join(repoRoot, '.tmp/docs-versioned-archives');
 const maxCloudflareFiles = 20_000;
 const maxCloudflareFileBytes = 25 * 1024 * 1024;
 
-// Cloudflare Pages header rules for the whole deployment. Mirrors the `noindex,follow`
-// meta tag the non-root channels emit, so the duplicate trees stay out of the index
-// even for responses a crawler takes without parsing the HTML.
+// Cloudflare Pages header rules for the static deployment. Mirrors the `noindex,follow`
+// meta tag the `main` channel emits, so the duplicate tree stays out of the index even
+// for responses a crawler takes without parsing the HTML. `/v/*` is served by the
+// archive Pages Function, which sets the same header itself.
 const deployHeaders = `# Generated by scripts/build-versioned-docs.ts. Do not edit by hand.
 /main/*
   X-Robots-Tag: noindex, follow
-
-/v/*
-  X-Robots-Tag: noindex, follow
 `;
 
 function run(
@@ -103,8 +106,7 @@ function copyCurrentDocsSite(targetDir: string) {
     recursive: true,
     dereference: false,
     filter: (source) =>
-      !/[\\/]node_modules([\\/]|$)/.test(source) &&
-      !/[\\/]\\.vitepress[\\/]dist([\\/]|$)/.test(source),
+      !/[\\/]node_modules([\\/]|$)/.test(source) && !isGeneratedVitePressPath(source),
   });
 }
 
@@ -173,8 +175,6 @@ function buildDocs(options: {
   outDir: string;
   channel: string;
   version?: string;
-  latestStable: string;
-  manifestJson: string;
 }) {
   console.info(`[docs] building ${options.version ?? options.channel} -> ${options.base}`);
   run('bun', ['run', '--cwd', currentDocsSite, 'vitepress', 'build', options.snapshotDocsSite], {
@@ -187,98 +187,13 @@ function buildDocs(options: {
       SUBMINER_DOCS_REPO_DIR: currentDocsSite,
       SUBMINER_DOCS_CHANNEL: options.channel,
       SUBMINER_DOCS_VERSION: options.version ?? '',
-      SUBMINER_DOCS_LATEST_STABLE: options.latestStable,
-      SUBMINER_DOCS_VERSION_MANIFEST: options.manifestJson,
       VITE_EXTRA_EXTENSIONS: 'jsonc',
     },
   });
 }
 
-function updateHashWithPath(hash: ReturnType<typeof createHash>, path: string) {
-  if (isSharedInternalsHashIgnoredPath(path)) {
-    return;
-  }
-
-  const stat = lstatSync(path);
-  const relativePath = path.replace(repoRoot, '');
-
-  if (stat.isSymbolicLink()) {
-    hash.update(`symlink:${relativePath}`);
-    hash.update(readlinkSync(path));
-    return;
-  }
-
-  if (stat.isDirectory()) {
-    hash.update(`dir:${relativePath}`);
-    for (const entry of readdirSync(path).sort()) {
-      updateHashWithPath(hash, join(path, entry));
-    }
-    return;
-  }
-
-  hash.update(`file:${relativePath}`);
-  hash.update(readFileSync(path));
-}
-
 function isGeneratedVitePressPath(path: string): boolean {
-  return /[\\/]\\.vitepress[\\/](cache|dist)([\\/]|$)/.test(path);
-}
-
-function isSharedInternalsHashIgnoredPath(path: string): boolean {
-  return isGeneratedVitePressPath(path) || /\.test\.[cm]?[jt]s$/.test(path);
-}
-
-function computeSharedInternalsHash(): string {
-  const hash = createHash('sha256');
-  hash.update(
-    `version-link-origin:${process.env.SUBMINER_DOCS_VERSION_LINK_ORIGIN === 'local' ? 'local' : 'production'}`,
-  );
-  const paths = [
-    join(currentDocsSite, '.vitepress'),
-    join(currentDocsSite, 'public/assets/fonts'),
-    join(currentDocsSite, 'package.json'),
-    join(currentDocsSite, 'bun.lock'),
-    join(repoRoot, 'scripts/build-versioned-docs.ts'),
-    join(repoRoot, 'scripts/docs-versioning.ts'),
-  ];
-
-  for (const path of paths) {
-    if (existsSync(path)) {
-      updateHashWithPath(hash, path);
-    }
-  }
-
-  return hash.digest('hex');
-}
-
-function archiveCachePath(version: string, sharedInternalsHash: string): string {
-  return join(archiveCacheRoot, versionArchiveCacheName(version, sharedInternalsHash));
-}
-
-function restoreCachedArchive(version: string, sharedInternalsHash: string): boolean {
-  const cachedArchive = archiveCachePath(version, sharedInternalsHash);
-  if (!existsSync(cachedArchive)) {
-    return false;
-  }
-
-  console.info(`[docs] cache hit ${version}`);
-  cpSync(cachedArchive, join(aggregateOutDir, versionOutputPath(version)), {
-    recursive: true,
-    force: true,
-  });
-  return true;
-}
-
-function saveArchiveCache(version: string, sharedInternalsHash: string) {
-  const outputPath = join(aggregateOutDir, versionOutputPath(version));
-  if (!existsSync(outputPath)) {
-    return;
-  }
-
-  const cachedArchive = archiveCachePath(version, sharedInternalsHash);
-  rmSync(cachedArchive, { recursive: true, force: true });
-  mkdirSync(archiveCacheRoot, { recursive: true });
-  cpSync(outputPath, cachedArchive, { recursive: true, force: true });
+  return /[\\/]\.vitepress[\\/](cache|dist)([\\/]|$)/.test(path);
 }
 
 function assertCloudflarePagesLimits(root: string) {
@@ -317,7 +232,66 @@ function assertCloudflarePagesLimits(root: string) {
   }
 }
 
+function currentCommit(): string {
+  return capture('git', ['rev-parse', 'HEAD']).trim();
+}
+
+function parseArgs(argv: string[]): { requireArchives: boolean; rebuild: Set<string> | 'all' } {
+  let requireArchives = false;
+  let rebuild: Set<string> | 'all' = new Set();
+  for (const arg of argv) {
+    if (arg === '--require-archives') {
+      requireArchives = true;
+    } else if (arg.startsWith('--rebuild-archives=')) {
+      const value = arg.slice('--rebuild-archives='.length).trim();
+      rebuild =
+        value === 'all'
+          ? 'all'
+          : new Set(
+              value
+                .split(',')
+                .map((tag) => tag.trim())
+                .filter(Boolean),
+            );
+    } else {
+      throw new Error(`Unknown argument: ${arg}`);
+    }
+  }
+  return { requireArchives, rebuild };
+}
+
+// Builds and uploads every stable archive that R2 does not already hold (or that was
+// explicitly requested). Old tags are rendered with the current `.vitepress` overlay.
+function syncArchives(options: {
+  store: DocsArchiveStore;
+  stableVersions: string[];
+  rebuild: Set<string> | 'all';
+}) {
+  const builtFrom = currentCommit();
+  for (const version of options.stableVersions) {
+    const forced = options.rebuild === 'all' || options.rebuild.has(version);
+    if (!forced && options.store.has(version)) {
+      continue;
+    }
+
+    console.info(`[docs] building archive ${version}`);
+    const outDir = join(archiveOutRoot, versionOutputPath(version));
+    rmSync(outDir, { recursive: true, force: true });
+    buildDocs({
+      snapshotDocsSite: prepareSnapshot(version, version),
+      base: versionPath(version),
+      outDir,
+      channel: 'stable-archive',
+      version,
+    });
+    console.info(`[docs] uploading archive ${version}`);
+    options.store.upload(version, outDir, builtFrom);
+    rmSync(outDir, { recursive: true, force: true });
+  }
+}
+
 function main() {
+  const { requireArchives, rebuild } = parseArgs(process.argv.slice(2));
   const stableVersions = getStableVersions();
   const latestStable = stableVersions[0];
 
@@ -325,54 +299,42 @@ function main() {
     throw new Error('No stable release tags with docs-site/package.json found.');
   }
 
+  if (rebuild !== 'all') {
+    const unknown = [...rebuild].filter((tag) => !stableVersions.includes(tag));
+    if (unknown.length > 0) {
+      throw new Error(`Cannot rebuild unknown stable docs versions: ${unknown.join(', ')}`);
+    }
+  }
+
   const manifest = buildVersionManifest({ latestStable, stableVersions });
-  const manifestJson = JSON.stringify(manifest);
-  const sharedInternalsHash = computeSharedInternalsHash();
-  const archiveCacheKey = versionArchiveCacheKey({ sharedInternalsHash, manifestJson });
   const sharedAssetPaths = collectSharedAssetPaths(join(currentDocsSite, 'public/assets'));
-  console.info(`[docs] archive cache key ${archiveCacheKey.slice(0, 12)}`);
 
   rmSync(buildRoot, { recursive: true, force: true });
   rmSync(aggregateOutDir, { recursive: true, force: true });
   mkdirSync(buildRoot, { recursive: true });
   mkdirSync(aggregateOutDir, { recursive: true });
 
+  const store = createArchiveStore(archiveStoreEnvFromProcess(process.env));
+  if (store) {
+    syncArchives({ store, stableVersions, rebuild });
+  } else if (requireArchives) {
+    throw new Error(
+      'Docs archive R2 credentials are missing (CLOUDFLARE_ACCOUNT_ID, DOCS_ARCHIVE_R2_ACCESS_KEY_ID, DOCS_ARCHIVE_R2_SECRET_ACCESS_KEY, DOCS_ARCHIVE_R2_BUCKET).',
+    );
+  } else {
+    console.warn('[docs] R2 credentials not set; skipping /v/<version>/ archive sync');
+  }
+
   const latestStableSnapshot = prepareSnapshot(latestStable, latestStable);
+  writeFileSync(join(latestStableSnapshot, 'versions.md'), renderVersionsPage(manifest));
   buildDocs({
     snapshotDocsSite: latestStableSnapshot,
     base: '/',
     outDir: aggregateOutDir,
     channel: 'stable-root',
     version: latestStable,
-    latestStable,
-    manifestJson,
   });
 
-  for (const version of stableVersions) {
-    if (restoreCachedArchive(version, archiveCacheKey)) {
-      continue;
-    }
-
-    console.info(`[docs] rebuilding archive ${version}`);
-    const snapshot =
-      version === latestStable ? latestStableSnapshot : prepareSnapshot(version, version);
-    buildDocs({
-      snapshotDocsSite: snapshot,
-      base: versionPath(version),
-      outDir: join(aggregateOutDir, versionOutputPath(version)),
-      channel: 'stable-archive',
-      version,
-      latestStable,
-      manifestJson,
-    });
-    dedupeVersionedPublicAssets({
-      outDir: join(aggregateOutDir, versionOutputPath(version)),
-      base: versionPath(version),
-      sharedAssetPaths,
-    });
-    saveArchiveCache(version, archiveCacheKey);
-  }
-
   const mainSnapshot = prepareSnapshot('main');
   buildDocs({
     snapshotDocsSite: mainSnapshot,
@@ -380,8 +342,6 @@ function main() {
     outDir: join(aggregateOutDir, 'main'),
     channel: 'main',
     version: 'main',
-    latestStable,
-    manifestJson,
   });
   dedupeVersionedPublicAssets({
     outDir: join(aggregateOutDir, 'main'),
@@ -392,13 +352,6 @@ function main() {
   writeFileSync(join(aggregateOutDir, 'versions.json'), `${JSON.stringify(manifest, null, 2)}\n`);
   writeFileSync(join(aggregateOutDir, '_headers'), deployHeaders);
   assertCloudflarePagesLimits(aggregateOutDir);
-  const prunedArchives = pruneArchiveCacheGenerations({
-    cacheRoot: archiveCacheRoot,
-    activeCacheKey: archiveCacheKey,
-  });
-  if (prunedArchives.length > 0) {
-    console.info(`[docs] pruned ${prunedArchives.length} stale archive cache directories`);
-  }
   rmSync(buildRoot, { recursive: true, force: true });
 }
 
diff --git a/scripts/docs-archive-store.ts b/scripts/docs-archive-store.ts
new file mode 100644
index 00000000..bc8966f6
--- /dev/null
+++ b/scripts/docs-archive-store.ts
@@ -0,0 +1,107 @@
+import { spawnSync } from 'node:child_process';
+import { writeFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { versionOutputPath } from './docs-versioning';
+
+// Frozen `/v/<version>/` doc builds live in an R2 bucket and are served by the Pages
+// Function in `docs-site/functions/v/[[path]].ts`, so they never count toward the Pages
+// deployment. Transfers go through the AWS CLI's S3 API (preinstalled on GitHub runners).
+
+// Written last on upload; an archive without it is treated as missing and rebuilt.
+export const ARCHIVE_MARKER = '_archive.json';
+
+export type DocsArchiveStore = {
+  has(version: string): boolean;
+  upload(version: string, dir: string, builtFrom: string): void;
+};
+
+export type DocsArchiveStoreEnv = {
+  accountId?: string;
+  accessKeyId?: string;
+  secretAccessKey?: string;
+  bucket?: string;
+};
+
+export function archiveStoreEnvFromProcess(env: NodeJS.ProcessEnv): DocsArchiveStoreEnv {
+  return {
+    accountId: env.CLOUDFLARE_ACCOUNT_ID,
+    accessKeyId: env.DOCS_ARCHIVE_R2_ACCESS_KEY_ID,
+    secretAccessKey: env.DOCS_ARCHIVE_R2_SECRET_ACCESS_KEY,
+    bucket: env.DOCS_ARCHIVE_R2_BUCKET,
+  };
+}
+
+export function archiveKeyPrefix(version: string): string {
+  return `${versionOutputPath(version)}/`;
+}
+
+// Returns null when credentials are absent so local builds can skip archive sync.
+export function createArchiveStore(config: DocsArchiveStoreEnv): DocsArchiveStore | null {
+  const { accountId, accessKeyId, secretAccessKey, bucket } = config;
+  if (!accountId || !accessKeyId || !secretAccessKey || !bucket) {
+    return null;
+  }
+
+  const endpoint = `https://${accountId}.r2.cloudflarestorage.com`;
+  const env: NodeJS.ProcessEnv = {
+    ...process.env,
+    AWS_ACCESS_KEY_ID: accessKeyId,
+    AWS_SECRET_ACCESS_KEY: secretAccessKey,
+    AWS_DEFAULT_REGION: 'auto',
+    // AWS CLI >= 2.23 sends CRC checksums by default, which R2 does not fully support.
+    AWS_REQUEST_CHECKSUM_CALCULATION: 'when_required',
+    AWS_RESPONSE_CHECKSUM_VALIDATION: 'when_required',
+  };
+
+  function aws(args: string[]) {
+    return spawnSync('aws', [...args, '--endpoint-url', endpoint], {
+      env,
+      encoding: 'utf8',
+      stdio: ['ignore', 'pipe', 'pipe'],
+    });
+  }
+
+  return {
+    has(version) {
+      const result = aws([
+        's3api',
+        'head-object',
+        '--bucket',
+        bucket,
+        '--key',
+        `${archiveKeyPrefix(version)}${ARCHIVE_MARKER}`,
+      ]);
+      if (result.error) throw result.error;
+      if (result.status === 0) return true;
+      if (/\b404\b|Not Found/i.test(result.stderr)) return false;
+      throw new Error(`Unable to check docs archive ${version}: ${result.stderr.trim()}`);
+    },
+
+    upload(version, dir, builtFrom) {
+      const target = `s3://${bucket}/${archiveKeyPrefix(version)}`;
+      // Unmark first so a rebuild that fails partway is retried by the next deploy
+      // instead of being skipped as complete. Deleting a missing key succeeds.
+      const unmark = aws(['s3', 'rm', `${target}${ARCHIVE_MARKER}`, '--only-show-errors']);
+      if (unmark.error) throw unmark.error;
+      if (unmark.status !== 0) {
+        throw new Error(`Unable to unmark docs archive ${version}: ${unmark.stderr.trim()}`);
+      }
+
+      const sync = aws(['s3', 'sync', dir, target, '--only-show-errors']);
+      if (sync.error) throw sync.error;
+      if (sync.status !== 0) {
+        throw new Error(`Unable to upload docs archive ${version}: ${sync.stderr.trim()}`);
+      }
+
+      const markerPath = join(dir, ARCHIVE_MARKER);
+      writeFileSync(
+        markerPath,
+        `${JSON.stringify({ version, builtFrom, builtAt: new Date().toISOString() }, null, 2)}\n`,
+      );
+      const marker = aws(['s3', 'cp', markerPath, `${target}${ARCHIVE_MARKER}`]);
+      if (marker.status !== 0) {
+        throw new Error(`Unable to mark docs archive ${version}: ${marker.stderr.trim()}`);
+      }
+    },
+  };
+}
diff --git a/scripts/docs-versioned-assets.test.ts b/scripts/docs-versioned-assets.test.ts
index 27e27c00..aa44b35a 100644
--- a/scripts/docs-versioned-assets.test.ts
+++ b/scripts/docs-versioned-assets.test.ts
@@ -3,11 +3,7 @@ import { existsSync, mkdirSync, mkdtempSync, readFileSync, writeFileSync } from
 import { rm } from 'node:fs/promises';
 import { tmpdir } from 'node:os';
 import { join } from 'node:path';
-import {
-  dedupeVersionedPublicAssets,
-  pruneArchiveCacheGenerations,
-  rewriteSharedAssetReferences,
-} from './docs-versioned-assets';
+import { dedupeVersionedPublicAssets, rewriteSharedAssetReferences } from './docs-versioned-assets';
 
 function tempDir() {
   return mkdtempSync(join(tmpdir(), 'subminer-docs-versioned-assets-'));
@@ -97,28 +93,3 @@ describe('docs versioned asset dedupe', () => {
     }
   });
 });
-
-describe('docs archive cache pruning', () => {
-  test('removes stale cache generations while keeping the active generation', async () => {
-    const dir = tempDir();
-    try {
-      mkdirSync(join(dir, 'active123456-v0.14.0'), { recursive: true });
-      mkdirSync(join(dir, 'stale654321-v0.14.0'), { recursive: true });
-      mkdirSync(join(dir, 'stale654321-v0.13.0'), { recursive: true });
-
-      const removed = pruneArchiveCacheGenerations({
-        cacheRoot: dir,
-        activeCacheKey: 'active123456abcdef',
-      });
-
-      expect(removed.sort()).toEqual([
-        join(dir, 'stale654321-v0.13.0'),
-        join(dir, 'stale654321-v0.14.0'),
-      ]);
-      expect(existsSync(join(dir, 'active123456-v0.14.0'))).toBe(true);
-      expect(existsSync(join(dir, 'stale654321-v0.14.0'))).toBe(false);
-    } finally {
-      await rm(dir, { recursive: true, force: true });
-    }
-  });
-});
diff --git a/scripts/docs-versioned-assets.ts b/scripts/docs-versioned-assets.ts
index 38e1f988..da9f5deb 100644
--- a/scripts/docs-versioned-assets.ts
+++ b/scripts/docs-versioned-assets.ts
@@ -119,30 +119,3 @@ function removeEmptyDirectories(root: string) {
     rmSync(root, { recursive: true, force: true });
   }
 }
-
-export function pruneArchiveCacheGenerations(options: {
-  cacheRoot: string;
-  activeCacheKey: string;
-}): string[] {
-  if (!existsSync(options.cacheRoot)) {
-    return [];
-  }
-
-  const activePrefix = options.activeCacheKey.slice(0, 12);
-  const removed: string[] = [];
-
-  for (const entry of readdirSync(options.cacheRoot)) {
-    const path = join(options.cacheRoot, entry);
-    if (!lstatSync(path).isDirectory()) {
-      continue;
-    }
-    if (entry.startsWith(`${activePrefix}-`)) {
-      continue;
-    }
-
-    rmSync(path, { recursive: true, force: true });
-    removed.push(path);
-  }
-
-  return removed;
-}
diff --git a/scripts/docs-versioning.test.ts b/scripts/docs-versioning.test.ts
index 379f0b54..e9afdf5a 100644
--- a/scripts/docs-versioning.test.ts
+++ b/scripts/docs-versioning.test.ts
@@ -2,10 +2,9 @@ import { describe, expect, test } from 'bun:test';
 import {
   buildVersionManifest,
   compareStableVersionsDesc,
-  versionArchiveCacheKey,
   isStableReleaseTag,
+  renderVersionsPage,
   stableTagsWithDocs,
-  versionArchiveCacheName,
   versionOutputPath,
   versionPath,
 } from './docs-versioning';
@@ -47,21 +46,16 @@ describe('docs versioning helpers', () => {
     });
   });
 
-  test('archive cache names are normalized by version and shared internals hash', () => {
-    expect(versionArchiveCacheName('v0.14.0', 'abcdef1234567890')).toBe('abcdef123456-v0.14.0');
-  });
+  test('versions page links every build with full page loads', () => {
+    const page = renderVersionsPage(
+      buildVersionManifest({ latestStable: 'v0.14.0', stableVersions: ['v0.14.0', 'v0.13.0'] }),
+    );
 
-  test('archive cache keys change when manifest contents change', () => {
-    const firstKey = versionArchiveCacheKey({
-      sharedInternalsHash: 'abcdef1234567890',
-      manifestJson: '{"latestStable":"v0.14.0"}',
-    });
-    const secondKey = versionArchiveCacheKey({
-      sharedInternalsHash: 'abcdef1234567890',
-      manifestJson: '{"latestStable":"v0.15.0"}',
-    });
-
-    expect(firstKey).not.toBe(secondKey);
+    expect(page).toContain('<a href="/" target="_self">Latest stable (v0.14.0)</a>');
+    expect(page).toContain('<a href="/main/" target="_self">main</a>');
+    expect(page).toContain('<a href="/v/0.14.0/" target="_self">v0.14.0</a>');
+    expect(page.indexOf('/v/0.14.0/')).toBeLessThan(page.indexOf('/v/0.13.0/'));
+    expect(page).toContain('<a href="/v/0.13.0/" target="_self">v0.13.0</a>');
   });
 
   test('archive output paths stay relative for filesystem joins', () => {
diff --git a/scripts/docs-versioning.ts b/scripts/docs-versioning.ts
index 517871b2..c3a50627 100644
--- a/scripts/docs-versioning.ts
+++ b/scripts/docs-versioning.ts
@@ -1,5 +1,3 @@
-import { createHash } from 'node:crypto';
-
 export type DocsVersionEntry = {
   version: string;
   path: string;
@@ -55,22 +53,6 @@ export function versionOutputPath(version: string): string {
   return `v/${version.replace(/^v/, '')}`;
 }
 
-export function versionArchiveCacheName(version: string, sharedInternalsHash: string): string {
-  return `${sharedInternalsHash.slice(0, 12)}-${version}`;
-}
-
-export function versionArchiveCacheKey(options: {
-  sharedInternalsHash: string;
-  manifestJson: string;
-}): string {
-  const hash = createHash('sha256');
-  hash.update('shared-internals:');
-  hash.update(options.sharedInternalsHash);
-  hash.update('\nmanifest:');
-  hash.update(options.manifestJson);
-  return hash.digest('hex');
-}
-
 export function stableTagsWithDocs(
   tags: string[],
   hasDocsSite: (tag: string) => boolean,
@@ -94,3 +76,27 @@ export function buildVersionManifest(options: {
     })),
   };
 }
+
+// Markdown for the root-only `/versions` page. Archives link here instead of baking the
+// release list into their nav, so an archive never needs a rebuild when a new tag ships.
+// Raw anchors with `target="_self"` keep VitePress from treating the other builds as
+// dead links or routing to them client-side.
+export function renderVersionsPage(manifest: DocsVersionManifest): string {
+  const link = (path: string, text: string) => `<a href="${path}" target="_self">${text}</a>`;
+  return [
+    '---',
+    'title: Documentation versions',
+    'description: Every published version of the SubMiner documentation.',
+    '---',
+    '',
+    '# Documentation versions',
+    '',
+    `- ${link('/', `Latest stable (${manifest.latestStable})`)}`,
+    `- ${link('/main/', 'main')}: development docs, may describe unreleased behavior`,
+    '',
+    '## Stable releases',
+    '',
+    ...manifest.versions.map((entry) => `- ${link(entry.path, entry.version)}`),
+    '',
+  ].join('\n');
+}
diff --git a/scripts/print-docs-version-manifest.ts b/scripts/print-docs-version-manifest.ts
deleted file mode 100644
index e6fc107e..00000000
--- a/scripts/print-docs-version-manifest.ts
+++ /dev/null
@@ -1,41 +0,0 @@
-import { spawnSync } from 'node:child_process';
-import { resolve } from 'node:path';
-import { buildVersionManifest, stableTagsWithDocs } from './docs-versioning';
-
-const repoRoot = resolve(__dirname, '..');
-
-function capture(command: string, args: string[]): string {
-  const result = spawnSync(command, args, {
-    cwd: repoRoot,
-    encoding: 'utf8',
-  });
-
-  if (result.status !== 0) {
-    throw new Error(result.stderr || `Command failed: ${command} ${args.join(' ')}`);
-  }
-
-  return result.stdout;
-}
-
-function tagHasDocsSite(tag: string): boolean {
-  const result = spawnSync('git', ['cat-file', '-e', `${tag}:docs-site/package.json`], {
-    cwd: repoRoot,
-  });
-  return result.status === 0;
-}
-
-const stableVersions = stableTagsWithDocs(
-  capture('git', ['tag', '--list', 'v*'])
-    .split('\n')
-    .map((tag) => tag.trim())
-    .filter(Boolean),
-  tagHasDocsSite,
-);
-
-const latestStable = stableVersions[0];
-
-if (!latestStable) {
-  throw new Error('No stable release tags with docs-site/package.json found.');
-}
-
-process.stdout.write(JSON.stringify(buildVersionManifest({ latestStable, stableVersions })));
diff --git a/src/ci-workflow.test.ts b/src/ci-workflow.test.ts
index ce153430..db4895c1 100644
--- a/src/ci-workflow.test.ts
+++ b/src/ci-workflow.test.ts
@@ -53,15 +53,17 @@ test('main docs deploy exists, serializes deploys, and uses Cloudflare credentia
   assert.match(docsPagesWorkflow, /CLOUDFLARE_API_TOKEN/);
   assert.match(docsPagesWorkflow, /CLOUDFLARE_ACCOUNT_ID/);
   assert.match(docsPagesWorkflow, /CLOUDFLARE_PAGES_PROJECT_NAME/);
-  assert.match(docsPagesWorkflow, /pages deploy \.tmp\/docs-versioned-site/);
+  assert.match(docsPagesWorkflow, /pages deploy \.\.\/\.tmp\/docs-versioned-site/);
   assert.match(docsPagesWorkflow, /--branch main/);
 });
 
-test('docs deploy caches stable archive builds between runs', () => {
-  assert.match(docsPagesWorkflow, /actions\/cache@v4/);
-  assert.match(docsPagesWorkflow, /\.tmp\/docs-versioned-archive-cache/);
-  assert.match(docsPagesWorkflow, /docs-versioned-archives-/);
-  assert.match(docsPagesWorkflow, /docs-site\/\.vitepress\/\*\*/);
+test('docs deploy syncs frozen archives to R2 and ships the archive Pages Function', () => {
+  assert.doesNotMatch(docsPagesWorkflow, /actions\/cache@/);
+  assert.match(docsPagesWorkflow, /DOCS_ARCHIVE_R2_ACCESS_KEY_ID/);
+  assert.match(docsPagesWorkflow, /DOCS_ARCHIVE_R2_SECRET_ACCESS_KEY/);
+  assert.match(docsPagesWorkflow, /--require-archives/);
+  assert.match(docsPagesWorkflow, /--rebuild-archives=\$\{REBUILD_ARCHIVES\}/);
+  assert.match(docsPagesWorkflow, /workingDirectory: docs-site/);
 });
 
 test('docs deploy skips invalid release tags without failing the workflow', () => {
diff --git a/src/release-workflow.test.ts b/src/release-workflow.test.ts
index 55d4ee9b..9946d1de 100644
--- a/src/release-workflow.test.ts
+++ b/src/release-workflow.test.ts
@@ -72,7 +72,7 @@ test('stable release tags publish docs and prereleases do not update stable docs
   assert.match(docsPagesWorkflow, /tags:\s*\n\s*-\s*'v\*'/);
   assert.match(docsPagesWorkflow, /github\.ref_name/);
   assert.match(docsPagesWorkflow, /\^v\[0-9\]\+\\\.\[0-9\]\+\\\.\[0-9\]\+\$/);
-  assert.match(docsPagesWorkflow, /bun run docs:build:versioned/);
+  assert.match(docsPagesWorkflow, /bun run scripts\/build-versioned-docs\.ts/);
   assert.doesNotMatch(docsPagesWorkflow, /beta/);
 });