encode · lovelydinosaur · Sep 11, 2026 · Sep 7, 2026 · Sep 7, 2026 · Sep 7, 2026
diff --git a/docs/LICENSE.md b/docs/LICENSE.md
@@ -0,0 +1,9 @@
+Copyright © 2026, Encode OSS Ltd.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+<p align="center">&mdash; 💖 &mdash;</p>
diff --git a/docs/css/theme.css b/docs/css/theme.css
@@ -44,7 +44,7 @@ main {
     }
 }
 
-@media (max-width: 800px) {
+@media (max-width: 750px) {
     main {
         padding: 1.5rem 1rem;
         width: 100%;
@@ -53,6 +53,10 @@ main {
     nav.toc {
         display: none;
     }
+
+    nav.site {
+        display: none;
+    }
 }
 
 /* Typography & spacing */
@@ -214,6 +218,45 @@ div.pagination a.next {
     text-decoration: none;
 }
 
+/* Navigation styling */
+
+nav.site {
+    position: fixed;
+    width : 20%;
+    padding: 2rem;
+    height: 100%;
+    overflow-y: scroll;
+}
+
+nav.site ul {
+    padding: 0;
+    margin: 0;
+}
+
+nav.site li {
+    padding: 0;
+    margin: 0.5rem 0;
+    display: block;
+}
+
+nav.site li a.active {
+    color: var(--link-color);
+}
+
+nav.site li a:hover {
+    color: var(--link-color);
+    text-decoration: none;
+}
+
+nav.site li a {
+    color: var(--muted-fg-color);
+}
+
+nav.site li a:hover {
+    color: var(--fg-color);
+    text-decoration: none;
+}
+
 /* Table of contents styling */
 
 nav.toc {
@@ -225,8 +268,6 @@ nav.toc {
     overflow-y: scroll;
 }
 
-/* Navigation styling */
-
 nav.toc ul {
     padding: 0;
     margin: 0;
@@ -254,4 +295,6 @@ nav.toc li a {
 nav.toc li a:hover {
     color: var(--fg-color);
     text-decoration: none;
-}
+}
+
+/* Navigation styling */
diff --git a/docs/templates/base.html b/docs/templates/base.html
@@ -12,6 +12,9 @@
         <script src="{{ '/js/theme.js' | url }}"></script>
     </head>
     <body>
+        <nav class="site">
+            {{ nav.html }}
+        </nav>
         <nav class="toc">
             {{ page.toc.html }}
         </nav>

diff --git a/src/mkdocs/mkdocs.py b/src/mkdocs/mkdocs.py
@@ -99,6 +99,26 @@ def __bool__(self):
         return bool(self._items)
 
 
+class NavItem:
+    def __init__(self, title: str, page: Page):
+        self.title = title
+        self.page = page
+
+
+class Navigation:
+    def __init__(self, nav_items):
+        self._items = nav_items
+
+    def __iter__(self):
+        return iter(self._items)
+
+    @property
+    def html(self):
+        page = get_current_page()
+        t = jinja2.Template("""<ul>{% for item in nav %}<li><a href="{{ item.page.url }}"  {% if item.page == page %}class="active"{% endif %}>{{ item.title }}</a></li>{% endfor %}</ul>""")
+        return t.render({"nav": self, "page": page})
+
+
 class PageContext:
     def __init__(self, page, text, html, toc):
         self.path = page.path
@@ -117,6 +137,7 @@ def title(self):
 class MkDocs:
     def __init__(self, input_dir):
         self.site = self.load_site(input_dir)
+        self.nav = self.load_nav({}, self.site)
         self.env = self.init_env(input_dir)
         self.md = self.init_md()
         self.base = self.env.get_template('base.html')
@@ -146,6 +167,29 @@ def load_site(self, input_dir):
         statics = sorted(statics, key=lambda x: x.url)
         return Site(pages, statics)
 
+    def load_nav(self, config, site):
+        if not config:
+            config = {"nav": [
+                {"title": page.path.stem, "path": str(page.path)}
+                for page in site.pages
+            ]}
+
+        nav_config = config.get('nav', [])
+        nav_config = nav_config if isinstance(nav_config, list) else []
+        nav_items = []
+        for item in nav_config:
+            if not isinstance(item, dict):
+                continue
+            path = item.get('path', '')
+            title = item.get('title', '')
+            if not path:
+                continue
+            if path:
+                page = site.lookup_by_path(path)
+            nav_item = NavItem(title, page)
+            nav_items.append(nav_item)
+        return Navigation(nav_items)
+
     def init_env(self, input_dir) -> jinja2.Environment:
         @jinja2.pass_context
         def url(ctx, url_to):
@@ -191,6 +235,8 @@ def set_context(self, current_page):
             _current_page.reset(token_page)
             _site.reset(token_site)
 
+    # Commands...
+
     def build(self, input, output):
         input_dir = pathlib.Path(input)
         output_dir = pathlib.Path(output)
@@ -206,7 +252,7 @@ def build(self, input, output):
                 html = self.md.reset().convert(text)
                 toc = TableOfContents(self.md)
                 page_ctx = PageContext(page=page, text=text, html=html, toc=toc)
-                output = self.base.render(page=page_ctx)
+                output = self.base.render(page=page_ctx, nav=self.nav)
 
             output_path.parent.mkdir(parents=True, exist_ok=True)
             output_path.write_text(output)
@@ -239,7 +285,7 @@ def app(request):
                     html = self.md.reset().convert(text)
                     toc = TableOfContents(self.md)
                     page_ctx = PageContext(page=resource, text=text, html=html, toc=toc)
-                    output = self.base.render(page=page_ctx)
+                    output = self.base.render(page=page_ctx, nav=self.nav)
                 return httpx.Response(200, content=httpx.HTML(output))
             elif isinstance(resource, Static):
                 input_path = input_dir.joinpath(resource.path)
@@ -250,6 +296,8 @@ def app(request):
         server.serve()
 
 
+# Command line client...
+
 @click.group()
 def cli():
     if pathlib.Path('mkdocs.yml').exists():

diff --git a/src/mkdocs/theme/base.html b/src/mkdocs/theme/base.html
@@ -43,19 +43,33 @@
 
 @media (max-width: 1000px) {
     main {
+        margin-left: 20%;
         width: 75%;
     }
 
     nav.toc {
         display: none;
     }
+
+    nav.site {
+        width: 25%;
+    }
 }
 
-@media (max-width: 600px) {
+@media (max-width: 750px) {
     main {
+        margin-left: 0;
         width: 100%;
         padding: 1rem 1.5rem;
     }
+
+    nav.toc {
+        display: none;
+    }
+
+    nav.site {
+        display: none;
+    }
 }
 
 /* Typography & spacing */
@@ -168,6 +182,14 @@
 
 /* Table of contents styling */
 
+nav.site {
+    position: fixed;
+    width : 20%;
+    padding: 2rem;
+    height: 100%;
+    overflow-y: scroll;
+}
+
 nav.toc {
     position: fixed;
     margin-left: 80%;
@@ -179,6 +201,35 @@
 
 /* Navigation styling */
 
+nav.site ul {
+    padding: 0;
+    margin: 0;
+}
+
+nav.site li {
+    padding: 0;
+    margin: 0.5rem 0;
+    display: block;
+}
+
+nav.site li a.active {
+    color: var(--link-color);
+}
+
+nav.site li a:hover {
+    color: var(--link-color);
+    text-decoration: none;
+}
+
+nav.site li a {
+    color: var(--muted-fg-color);
+}
+
+nav.site li a:hover {
+    color: var(--fg-color);
+    text-decoration: none;
+}
+
 nav.toc ul {
     padding: 0;
     margin: 0;
@@ -210,6 +261,11 @@
         </style>
     </head>
     <body>
+        {% if nav %}
+        <nav class="site">
+            {{ nav.html }}
+        </nav>
+        {% endif %}
         {% if page.toc %}
         <nav class="toc">
             {{ page.toc.html }}

diff --git a/uv.lock b/uv.lock