diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000..2bd5a0a
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+22
diff --git a/README.md b/README.md
index f12bbba..90726e1 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ A combination of the highly functional Ghost [Dawn](https://github.com/tryghost/
 
 ![Chapter theme demonstration](assets/images/demo.png)
 
-**Demo**: <https://ghost-chapter.neveroff.dev/>
+**Demo**: <https://ghost-chapter.neveroff.dev/> — demo-only header/footer snippets (disabled buy CTA, GitHub links) live in [`docs/demo-site/`](docs/demo-site/), not in the theme zip.
 
 **Requires Ghost 6.0 or later**.
 
@@ -38,9 +38,12 @@ Chapter 1.6.0 requires Ghost 6. Upgrade your instance before uploading this them
 
 ## Development
 
-Styles are compiled using Gulp/PostCSS. You need **Node.js 22+** and [pnpm](https://pnpm.io/installation).
+Styles are compiled using Gulp/PostCSS. Ghost 6 requires **Node.js 22** (not 24). This repo includes an `.nvmrc`; use [nvm](https://github.com/nvm-sh/nvm) so your shell matches before working on the theme or running Ghost locally.
 
 ```bash
+# Use the Node version Ghost expects (run in this directory)
+nvm use
+
 # Install dependencies
 pnpm install
 
@@ -51,10 +54,14 @@ pnpm dev
 For live preview against a local Ghost install, run these in separate terminals:
 
 ```bash
+# Terminal 1 — theme assets (this directory)
+nvm use
 pnpm dev
 
-# From your Ghost install directory
-ghost run -D
+# Terminal 2 — Ghost (your install directory, e.g. ../.. from here)
+nvm use 22
+ghost doctor   # optional sanity check
+ghost start    # or: ghost run -D for theme development
 ```
 
 Edit files under `assets/css/`; compiled output goes to `assets/built/`.
diff --git a/docs/demo-site/README.md b/docs/demo-site/README.md
new file mode 100644
index 0000000..89396c7
--- /dev/null
+++ b/docs/demo-site/README.md
@@ -0,0 +1,20 @@
+# Demo site code injection
+
+Snippets for [ghost-chapter.neveroff.dev](https://ghost-chapter.neveroff.dev/). These are **not** part of the theme — paste them into Ghost Admin on the demo instance only.
+
+**Settings → Code injection**
+
+| Field | File |
+|-------|------|
+| Site Header | [`code-injection-header.html`](code-injection-header.html) |
+| Site Footer | [`code-injection-footer.html`](code-injection-footer.html) |
+
+Append any site-specific header tags (e.g. analytics) before the header snippet. The footer script replaces the old Stripe buy-button injection.
+
+What it does:
+
+- Shows a crossed-out “Buy Chapter for $39” label (no longer sold)
+- Adds a GitHub download link beside the header CTA
+- Adds a GitHub icon to the footer “Chapter” attribution link
+
+If the header GitHub icon is hard to see on a light header, change `.ch-demo-github-download { color: #fff; }` to `color: currentColor;` in the header snippet.
diff --git a/docs/demo-site/code-injection-footer.html b/docs/demo-site/code-injection-footer.html
new file mode 100644
index 0000000..c77ebb8
--- /dev/null
+++ b/docs/demo-site/code-injection-footer.html
@@ -0,0 +1,32 @@
+<script>
+  document.addEventListener('DOMContentLoaded', function () {
+    var repoUrl = 'https://github.com/mneveroff/ghost-chapter';
+    var githubIcon = '<svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" aria-hidden="true"><path fill-rule="evenodd" clip-rule="evenodd" d="M512 0C229.12 0 0 229.12 0 512c0 226.56 146.56 417.92 350.08 485.76 25.6 4.48 35.2-10.88 35.2-24.32 0-12.16-.64-52.48-.64-95.36-128.64 23.68-161.92-31.36-172.16-60.16-5.76-14.72-30.72-60.16-52.48-72.32-17.92-9.6-43.52-33.28-.64-33.92 40.32-.64 69.12 37.12 78.72 52.48 46.08 77.44 119.68 55.68 149.12 42.24 4.48-33.28 17.92-55.68 32.64-68.48-113.92-12.8-232.96-56.96-232.96-252.8 0-55.68 19.84-101.76 52.48-137.6-5.12-12.8-23.04-65.28 5.12-135.68 0 0 42.88-13.44 140.8 52.48 40.96-11.52 84.48-17.28 128-17.28s87.04 5.76 128 17.28c97.92-66.56 140.8-52.48 140.8-52.48 28.16 70.4 10.24 122.88 5.12 135.68 32.64 35.84 52.48 81.28 52.48 137.6 0 196.48-119.68 240-233.6 252.8 18.56 16 34.56 46.72 34.56 94.72 0 68.48-.64 123.52-.64 140.8 0 13.44 9.6 29.44 35.2 24.32C877.44 929.92 1024 737.92 1024 512 1024 229.12 794.88 0 512 0"/></svg>';
+
+    var ctaHtml = [
+      '<div class="ch-demo-cta">',
+      '<span class="gh-btn ch-demo-buy-disabled" aria-disabled="true">Buy Chapter for $39</span>',
+      '<a class="ch-demo-github-download" href="' + repoUrl + '" target="_blank" rel="noopener" aria-label="Download Chapter on GitHub">',
+      githubIcon,
+      '</a>',
+      '</div>'
+    ].join('');
+
+    ['.gh-signup', '.gh-head-members'].forEach(function (selector) {
+      var element = document.querySelector(selector);
+      if (element) {
+        element.innerHTML = ctaHtml;
+      }
+    });
+
+    var chapterLink = document.querySelector('.gh-powered-by a[href*="github.com/mneveroff/ghost-chapter"]');
+    if (chapterLink && !chapterLink.querySelector('.ch-demo-github-icon')) {
+      chapterLink.classList.add('ch-demo-powered-by-link');
+      var icon = document.createElement('span');
+      icon.className = 'ch-demo-github-icon';
+      icon.setAttribute('aria-hidden', 'true');
+      icon.innerHTML = githubIcon;
+      chapterLink.insertBefore(icon, chapterLink.firstChild);
+    }
+  });
+</script>
diff --git a/docs/demo-site/code-injection-header.html b/docs/demo-site/code-injection-header.html
new file mode 100644
index 0000000..b56eed1
--- /dev/null
+++ b/docs/demo-site/code-injection-header.html
@@ -0,0 +1,64 @@
+<style>
+  .gh-powered-by .ch-demo-powered-by-link {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.35em;
+  }
+
+  .ch-demo-github-icon svg {
+    width: 1.1em;
+    height: 1.1em;
+    fill: currentColor;
+    vertical-align: -0.15em;
+  }
+
+  .ch-demo-cta {
+    display: flex;
+    align-items: center;
+    gap: 0.8rem;
+  }
+
+  .gh-signup .ch-demo-cta {
+    width: 100%;
+    max-width: 440px;
+  }
+
+  .gh-signup .ch-demo-buy-disabled {
+    flex: 1 1 auto;
+    min-width: 0;
+  }
+
+  .gh-btn.ch-demo-buy-disabled {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    height: 40px;
+    padding: 0 1.6rem;
+    pointer-events: none;
+    cursor: not-allowed;
+    opacity: 0.55;
+    text-decoration: line-through;
+    white-space: nowrap;
+  }
+
+  .ch-demo-github-download {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    flex-shrink: 0;
+    width: 40px;
+    height: 40px;
+    color: #fff;
+    text-decoration: none;
+  }
+
+  .ch-demo-github-download:hover {
+    opacity: 0.85;
+  }
+
+  .ch-demo-github-download svg {
+    width: 40px;
+    height: 40px;
+    fill: currentColor;
+  }
+</style>
diff --git a/gulpfile.js b/gulpfile.js
index a820845..885ae52 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -66,6 +66,7 @@ function js(done) {
 
 const zipSrcGlobs = [
     '**',
+    '!docs', '!docs/**',
     '!node_modules', '!node_modules/**',
     '!dist', '!dist/**',
     '!yarn-error.log',