diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
new file mode 100644
index 0000000..fa6bef6
--- /dev/null
+++ b/.github/workflows/pr.yml
@@ -0,0 +1,9 @@
+name: PR
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    uses: purview-dev/build/.github/workflows/purview-build.yml@main
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..f156a2b
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,19 @@
+name: Release
+
+on:
+  push:
+    branches: [main]
+
+# Serialize releases; the reusable workflow skips when the v{version} tag already exists.
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  release:
+    uses: purview-dev/build/.github/workflows/purview-release.yml@main
+    with:
+      # The site publishes no NuGet package; tag + GitHub release (with the dist zip attached) only.
+      release-mode: GitHubRelease
+      upload-artifacts: true
+    secrets: inherit
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
deleted file mode 100644
index 896ec45..0000000
--- a/.github/workflows/validate.yml
+++ /dev/null
@@ -1,44 +0,0 @@
-name: Validate
-
-on:
-  pull_request:
-    branches: [main]
-  push:
-    branches: [main]
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-jobs:
-  validate:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        # actions/checkout v7.0.1
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
-
-      - name: Install Bun
-        # oven-sh/setup-bun v2.2.0
-        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6
-        with:
-          bun-version: 1.4.2
-
-      - name: Install Just
-        # taiki-e/install-action v2.87.13
-        uses: taiki-e/install-action@26e9283f268b880168bdbd2c545dfcd60ec2c6ab
-        with:
-          tool: just@1.58.0
-
-      # The repository is a Bun workspace: the lockfile and root `package.json`
-      # live here, the Astro site package lives in `src/`, and every `bun run`
-      # / `just` recipe delegates to `src/` (see `package.json` scripts).
-      - name: Install dependencies
-        run: bun install --frozen-lockfile
-
-      - name: Run validation
-        # `just validate` runs a live data sync on fresh checkouts (no cache /
-        # docs mirror yet), so pass a token to avoid unauthenticated rate limits.
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: just validate
diff --git a/README.md b/README.md
index cce56ba..0225eee 100644
--- a/README.md
+++ b/README.md
@@ -119,6 +119,7 @@ output tests.
 | `test`             | Deterministic unit test suite                       |
 | `test-dist`        | Assert built outputs (llms, sitemap, no secrets)    |
 | `build`            | Production build (runs data sync first)             |
+| `ci-build`         | Full CI validation chain used by the shared pipeline |
 | `preview`          | Preview the production build                        |
 | `check-assets`     | Validate branding sources and generated assets      |
 | `check-links`      | Validate internal links across `dist/`              |
@@ -255,6 +256,25 @@ The build generates `/llms.txt`, `/llms-small.txt`, and `/llms-full.txt`
 the aggregated documentation. The built outputs are asserted by `tests/dist/`
 and `just check-generated`.
 
+## Site versioning and releases
+
+The site is versioned like every other purview-dev repository. The single
+source of truth is the `version` field in the root `package.json`; the footer
+shows the current `v{version}` (linking to the repository's GitHub releases
+page), read at build time by `src/src/lib/site-version.ts`.
+
+Building and release flow run through the shared
+[Purview.Build](https://purview.dev/projects/build/) system as a `Web` project
+(`Build:ProjectType=Web` in `purview-build.json`): the pipeline runs the root
+`package.json` scripts (`bun install`, `bun run format:check`/`bun run lint`,
+`bun run test`) and the `ci:build` script, which chains data sync, typecheck,
+asset checks, the production build, link crawl, generated-output checks, and
+built-output tests. Releasing means bumping `version` in the root
+`package.json` and merging: the `Release` workflow (`purview-release.yml`,
+`release-mode: GitHubRelease`) runs the pipeline, tags `v{version}`, and uploads
+the built `dist/` zip as a GitHub release asset. `deploy.yml` continues to
+publish the site to GitHub Pages.
+
 ## GitHub Pages deployment
 
 This repository is the organisation Pages repository
diff --git a/justfile b/justfile
index 6d42536..7943429 100644
--- a/justfile
+++ b/justfile
@@ -64,6 +64,10 @@ build:
     bun run data:sync
     bun run build
 
+# Full CI validation chain used by the shared build pipeline (data sync → typecheck → build → checks).
+ci-build:
+    bun run ci:build
+
 # Preview the production build locally.
 preview:
     bun run preview
diff --git a/package.json b/package.json
index 042c55d..76a7801 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,6 @@
 {
   "name": "purview-dev",
+  "version": "0.1.0",
   "private": true,
   "description": "Purview-Dev public website and unified documentation portal (workspace root).",
   "license": "MIT",
@@ -12,6 +13,7 @@
     "check:assets": "bun run --cwd src check:assets",
     "check:generated": "bun run --cwd src check:generated",
     "check:links": "bun run --cwd src check:links",
+    "ci:build": "bun run data:sync && bun run typecheck && bun run check:assets && bun run build && bun run check:links && bun run check:generated && bun run test:dist",
     "clean": "bun run --cwd src clean",
     "data:sync": "bun run --cwd src data:sync",
     "dev": "bun run --cwd src dev",
diff --git a/purview-build.json b/purview-build.json
new file mode 100644
index 0000000..8945a31
--- /dev/null
+++ b/purview-build.json
@@ -0,0 +1,9 @@
+{
+  "Build": {
+    "ProjectType": "Web",
+    "WebBuildCommand": "bun run ci:build"
+  },
+  "Release": {
+    "Mode": "None"
+  }
+}
\ No newline at end of file
diff --git a/src/src/components/SiteFooter.astro b/src/src/components/SiteFooter.astro
index d6ccbec..7c0f907 100644
--- a/src/src/components/SiteFooter.astro
+++ b/src/src/components/SiteFooter.astro
@@ -2,7 +2,8 @@
 import SiteBrand from '~/components/SiteBrand.astro';
 import { NAV_ITEMS } from '~/components/SiteNav.astro';
 import { loadProjects } from '~/lib/manifest/load';
-import { SITE } from '~/lib/site';
+import { siteVersion } from '~/lib/site-version';
+import { OWNER, SITE } from '~/lib/site';
 import { withBase } from '~/lib/urls';
 
 // Shuffled at build time so the footer doesn't always spotlight the same projects.
@@ -10,6 +11,9 @@ const footerProjects = loadProjects()
   .filter((project) => project.status !== 'archived')
   .toSorted(() => Math.random() - 0.5)
   .slice(0, 3);
+
+const version = siteVersion();
+const releasesUrl = `${SITE.githubUrl}/${OWNER}.github.io/releases`;
 ---
 
 <footer class="border-t border-border bg-surface">
@@ -83,6 +87,11 @@ const footerProjects = loadProjects()
         <span class="beta-badge">Beta</span>
         This site is under active development.
       </p>
+      <p class="flex items-center gap-2">
+        <a href={releasesUrl} class="pv-link" title={`Purview website v${version}`}
+          >v{version}</a
+        >
+      </p>
       <p class="flex items-center gap-2">
         Built with <a href="https://astro.build" class="pv-link">Astro</a> and <a
           href="https://starlight.astro.build"
diff --git a/src/src/components/islands/PackageVersions.tsx b/src/src/components/islands/PackageVersions.tsx
index 4d962d1..ddac1df 100644
--- a/src/src/components/islands/PackageVersions.tsx
+++ b/src/src/components/islands/PackageVersions.tsx
@@ -11,6 +11,8 @@ export interface PackageRow {
   nugetUrl: string;
   projectUrl: string;
   deprecated?: boolean;
+  /** Hash link to this package's install section, e.g. "#install-purview-foo". */
+  installAnchor?: string;
 }
 
 type SortKey = 'package' | 'project' | 'stable' | 'prerelease' | 'downloads';
@@ -175,6 +177,11 @@ export default function PackageVersions({ packages, showProject = true }: Props)
               deprecated
             </span>
           )}
+          {row.installAnchor && (
+            <a href={row.installAnchor} class="pv-link ml-2 text-xs whitespace-nowrap">
+              Install ↓
+            </a>
+          )}
         </td>
         {showProjectColumn && (
           <td class="px-4 py-3">
@@ -265,7 +272,7 @@ export default function PackageVersions({ packages, showProject = true }: Props)
                   <button
                     type="button"
                     onClick={() => toggleSort(column.key)}
-                    class="hover:text-accent font-semibold"
+                    class="hover:text-accent border-0 bg-transparent p-0 font-semibold"
                     title={column.title}
                   >
                     {column.label}
diff --git a/src/src/lib/install.ts b/src/src/lib/install.ts
index f091502..19fe5b9 100644
--- a/src/src/lib/install.ts
+++ b/src/src/lib/install.ts
@@ -3,6 +3,11 @@ import type { ResolvedProject } from './manifest/load';
 /** How a project's primary NuGet package is consumed. */
 export type InstallKind = 'nuget' | 'msbuild-sdk' | 'dotnet-tool';
 
+/** Anchor id for a package's install section, used to link from the packages table. */
+export function installAnchorId(packageId: string): string {
+  return `install-${packageId.toLowerCase().replace(/[^a-z0-9]+/g, '-')}`;
+}
+
 /** A single copyable install snippet. */
 export interface InstallOption {
   /** Short name for the snippet, e.g. "Directory.Packages.props". */
diff --git a/src/src/lib/site-version.ts b/src/src/lib/site-version.ts
new file mode 100644
index 0000000..7b810a2
--- /dev/null
+++ b/src/src/lib/site-version.ts
@@ -0,0 +1,46 @@
+import { existsSync, readFileSync } from 'node:fs';
+import { dirname, join, resolve } from 'node:path';
+
+/**
+ * Locate the workspace root: the nearest ancestor package.json that declares a
+ * `workspaces` array. This is the repository root, which owns the site's
+ * release version (the same file Purview.Build reads to tag `v{version}`).
+ */
+export function findWorkspaceRoot(startDir: string = process.cwd()): string {
+  let directory = resolve(startDir);
+  for (;;) {
+    const packagePath = join(directory, 'package.json');
+    if (existsSync(packagePath)) {
+      const manifest: unknown = JSON.parse(readFileSync(packagePath, 'utf8'));
+      const workspaces = (manifest as { workspaces?: unknown }).workspaces;
+      if (Array.isArray(workspaces) && workspaces.length > 0) {
+        return directory;
+      }
+    }
+
+    const parent = dirname(directory);
+    if (parent === directory) {
+      throw new Error(`Could not locate a workspace root above ${startDir}`);
+    }
+    directory = parent;
+  }
+}
+
+/**
+ * The site's own version, read from the workspace-root package.json. Used in
+ * the footer and asserted by the built-output tests.
+ */
+export function readVersion(root: string): string {
+  const manifest: unknown = JSON.parse(readFileSync(join(root, 'package.json'), 'utf8'));
+  const version = (manifest as { version?: string }).version;
+  if (!version) {
+    throw new Error(
+      `The workspace root package.json at ${join(root, 'package.json')} has no version.`,
+    );
+  }
+  return version;
+}
+
+export function siteVersion(): string {
+  return readVersion(findWorkspaceRoot());
+}
diff --git a/src/src/pages/404.astro b/src/src/pages/404.astro
index 74ca723..6ba2430 100644
--- a/src/src/pages/404.astro
+++ b/src/src/pages/404.astro
@@ -14,28 +14,13 @@ import { withBase } from '~/lib/urls';
       This page seems to have evaporated.
     </h1>
     <p class="mt-6 max-w-xl text-lg text-muted">
-      The URL you followed does not exist on {SITE.domain}. The beaker may have
-      bubbled over — or the link may be out of date.
+      The URL you followed does not exist on {SITE.domain}. The beaker may have bubbled over — or
+      the link may be out of date.
     </p>
     <div class="mt-10 flex flex-wrap justify-center gap-3">
-      <a
-        href={withBase('/')}
-        class="rounded-lg bg-brand px-5 py-2.5 font-medium text-white transition-colors hover:bg-brand-emphasis"
-      >
-        Back to the homepage
-      </a>
-      <a
-        href={withBase('/projects/')}
-        class="rounded-lg border border-border bg-surface px-5 py-2.5 font-medium transition-colors hover:border-brand/40"
-      >
-        Browse projects
-      </a>
-      <a
-        href={withBase('/docs/')}
-        class="rounded-lg px-5 py-2.5 font-medium text-accent underline decoration-1 underline-offset-4 hover:decoration-2"
-      >
-        Documentation
-      </a>
+      <a href={withBase('/')} class="pv-btn pv-btn-primary"> Back to the homepage </a>
+      <a href={withBase('/projects/')} class="pv-btn pv-btn-secondary"> Browse projects </a>
+      <a href={withBase('/docs/')} class="pv-btn pv-btn-ghost"> Documentation </a>
     </div>
   </div>
-</SiteLayout>
\ No newline at end of file
+</SiteLayout>
diff --git a/src/src/pages/projects/[project].astro b/src/src/pages/projects/[project].astro
index a1a9df4..d40c819 100644
--- a/src/src/pages/projects/[project].astro
+++ b/src/src/pages/projects/[project].astro
@@ -4,7 +4,7 @@ import InstallPanel from '~/components/islands/InstallPanel.tsx';
 import PackageVersions, { type PackageRow } from '~/components/islands/PackageVersions.tsx';
 import StatusBadge from '~/components/StatusBadge.astro';
 import { buildBadge, nugetDownloadsBadge, nugetVersionBadge, actionsUrl } from '~/lib/badges';
-import { installKindFor, installTabs } from '~/lib/install';
+import { installAnchorId, installKindFor, installTabs } from '~/lib/install';
 import { loadProjects } from '~/lib/manifest/load';
 import { projectRepoEnrichment } from '~/lib/releases/repo';
 import { projectReleaseSummary } from '~/lib/releases/transform';
@@ -45,17 +45,23 @@ const supersededBy =
 const primaryPackage = project.packages.find((pkg) => pkg.primary) ?? project.packages[0];
 const docsPath = project.docs ? withBase(`/docs/${project.id}/`) : null;
 const targetFrameworks = project.targetFrameworks ?? [];
-const primaryRelease =
-  primaryPackage ? releases.packages.find((pkg) => pkg.packageId === primaryPackage.id) : undefined;
-const installTabsOptions =
-  primaryPackage && project.status !== 'archived' ?
-    installTabs(
-      installKindFor(project),
-      primaryPackage.id,
-      primaryRelease?.latestStable ?? primaryRelease?.latestPrerelease ?? null,
-    )
+const installSections =
+  project.status !== 'archived' ?
+    project.packages.map((pkg) => {
+      const release = releases.packages.find((candidate) => candidate.packageId === pkg.id);
+      return {
+        packageId: pkg.id,
+        primary: pkg.primary ?? false,
+        tabs: installTabs(
+          installKindFor(project),
+          pkg.id,
+          release?.latestStable ?? release?.latestPrerelease ?? null,
+        ),
+      };
+    })
   : [];
 const projectUrl = withBase(`/projects/${project.id}/`);
+const hasInstallSections = installSections.length > 0;
 const packageRows: PackageRow[] = releases.packages.map((pkg) => ({
   projectId: project.id,
   projectName: project.name,
@@ -66,6 +72,7 @@ const packageRows: PackageRow[] = releases.packages.map((pkg) => ({
   totalDownloads: pkg.totalDownloads,
   nugetUrl: pkg.nugetUrl,
   deprecated: pkg.deprecated,
+  installAnchor: hasInstallSections ? `#${installAnchorId(pkg.packageId)}` : undefined,
 }));
 ---
 
@@ -119,16 +126,13 @@ const packageRows: PackageRow[] = releases.packages.map((pkg) => ({
           href={project.sourceUrl}
           rel="noopener noreferrer"
           target="_blank"
-          class="rounded-lg bg-brand px-4 py-2 text-sm font-medium text-white transition-colors hover:bg-brand-emphasis"
+          class="pv-btn pv-btn-primary pv-btn-sm"
         >
           Source code
         </a>
         {
           docsPath && (
-            <a
-              href={docsPath}
-              class="rounded-lg border border-border bg-surface px-4 py-2 text-sm font-medium transition-colors hover:border-brand/40"
-            >
+            <a href={docsPath} class="pv-btn pv-btn-secondary pv-btn-sm">
               Documentation
             </a>
           )
@@ -137,7 +141,7 @@ const packageRows: PackageRow[] = releases.packages.map((pkg) => ({
           href={project.releasesUrl}
           rel="noopener noreferrer"
           target="_blank"
-          class="rounded-lg border border-border bg-surface px-4 py-2 text-sm font-medium transition-colors hover:border-brand/40"
+          class="pv-btn pv-btn-secondary pv-btn-sm"
         >
           Releases
         </a>
@@ -145,7 +149,7 @@ const packageRows: PackageRow[] = releases.packages.map((pkg) => ({
           href={project.issuesUrl}
           rel="noopener noreferrer"
           target="_blank"
-          class="rounded-lg border border-border bg-surface px-4 py-2 text-sm font-medium transition-colors hover:border-brand/40"
+          class="pv-btn pv-btn-secondary pv-btn-sm"
         >
           Issues
         </a>
@@ -155,7 +159,7 @@ const packageRows: PackageRow[] = releases.packages.map((pkg) => ({
               href={project.discussionsUrl}
               rel="noopener noreferrer"
               target="_blank"
-              class="rounded-lg border border-border bg-surface px-4 py-2 text-sm font-medium transition-colors hover:border-brand/40"
+              class="pv-btn pv-btn-secondary pv-btn-sm"
             >
               Discussions
             </a>
@@ -243,10 +247,26 @@ const packageRows: PackageRow[] = releases.packages.map((pkg) => ({
         }
 
         {
-          primaryPackage && project.status !== 'archived' && (
+          installSections.length > 0 && (
             <section>
               <h2 class="text-xl font-semibold">Install</h2>
-              <InstallPanel client:idle tabs={installTabsOptions} />
+              <div class="mt-4 space-y-8">
+                {installSections.map((install) => (
+                  <div id={installAnchorId(install.packageId)} class="scroll-mt-20">
+                    {installSections.length > 1 && (
+                      <h3 class="flex flex-wrap items-center gap-2 font-mono text-sm font-semibold text-foreground">
+                        {install.packageId}
+                        {install.primary && (
+                          <span class="border-brand/30 bg-brand/5 text-brand pv-chip">primary</span>
+                        )}
+                      </h3>
+                    )}
+                    <div class={installSections.length > 1 ? 'mt-2' : ''}>
+                      <InstallPanel client:idle tabs={install.tabs} />
+                    </div>
+                  </div>
+                ))}
+              </div>
             </section>
           )
         }
diff --git a/src/src/styles/global.css b/src/src/styles/global.css
index 216a67f..67f1c2f 100644
--- a/src/src/styles/global.css
+++ b/src/src/styles/global.css
@@ -409,6 +409,13 @@
   .pv-btn-ghost:hover {
     background-color: color-mix(in oklab, var(--color-brand) 8%, transparent);
   }
+
+  .pv-btn-sm {
+    gap: 0.375rem;
+    border-radius: 0.5rem;
+    padding: 0.5rem 1rem;
+    font-size: 0.8125rem;
+  }
 }
 
 /* ---------------------------------------------------------------------------
diff --git a/src/tests/dist/built-output.test.ts b/src/tests/dist/built-output.test.ts
index 9052376..d362fb2 100644
--- a/src/tests/dist/built-output.test.ts
+++ b/src/tests/dist/built-output.test.ts
@@ -80,3 +80,17 @@ describe('built HTML safety', () => {
     }
   });
 });
+
+describe('built footer version', () => {
+  test('homepage footer shows the workspace root version', () => {
+    const manifest = JSON.parse(readFileSync(resolve('..', 'package.json'), 'utf8')) as {
+      version?: string;
+    };
+    const version = manifest.version;
+    expect(version).toBeTruthy();
+
+    const content = requireBuilt('index.html');
+    expect(content).toContain(`>v${version}<`);
+    expect(content).toContain('https://github.com/purview-dev/purview-dev.github.io/releases');
+  });
+});
diff --git a/src/tests/unit/site-version.test.ts b/src/tests/unit/site-version.test.ts
new file mode 100644
index 0000000..478c9ce
--- /dev/null
+++ b/src/tests/unit/site-version.test.ts
@@ -0,0 +1,56 @@
+import { describe, expect, test } from 'bun:test';
+import { mkdtempSync, rmSync, writeFileSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+
+import { findWorkspaceRoot, readVersion } from '../../src/lib/site-version';
+
+function createFixture(): string {
+  const root = mkdtempSync(join(tmpdir(), 'purview-site-version-'));
+  writeFileSync(
+    join(root, 'package.json'),
+    JSON.stringify({ name: 'purview-dev', version: '0.1.0', workspaces: ['src'] }),
+  );
+  return root;
+}
+
+describe('findWorkspaceRoot', () => {
+  test('resolves the nearest ancestor package.json with workspaces', () => {
+    const root = createFixture();
+    try {
+      expect(findWorkspaceRoot(join(root, 'src', 'nested'))).toBe(root);
+    } finally {
+      rmSync(root, { recursive: true, force: true });
+    }
+  });
+
+  test('throws when no workspace root exists', () => {
+    const root = mkdtempSync(join(tmpdir(), 'purview-site-version-none-'));
+    try {
+      expect(() => findWorkspaceRoot(root)).toThrow();
+    } finally {
+      rmSync(root, { recursive: true, force: true });
+    }
+  });
+});
+
+describe('readVersion', () => {
+  test('returns the version field', () => {
+    const root = createFixture();
+    try {
+      expect(readVersion(root)).toBe('0.1.0');
+    } finally {
+      rmSync(root, { recursive: true, force: true });
+    }
+  });
+
+  test('throws when the version field is missing', () => {
+    const root = mkdtempSync(join(tmpdir(), 'purview-site-version-none-'));
+    try {
+      writeFileSync(join(root, 'package.json'), JSON.stringify({ name: 'purview-dev' }));
+      expect(() => readVersion(root)).toThrow();
+    } finally {
+      rmSync(root, { recursive: true, force: true });
+    }
+  });
+});