Fixed old permalink being redirected to 404

README.md

@@ -118,4 +118,8 @@ bundle install
 ## Run Locally
 To preview the site on your machine:
 * Run `jekyll serve --livereload` from the project root.
-* Open [http://localhost:4000](http://localhost:4000) in your browser.
+* Open [http://localhost:4000](http://localhost:4000) in your browser.
+
+For faster local iteration while writing content:
+* Run `jekyll serve --config _config.yml,_config.dev.yml --livereload`
+* This disables redirect generation locally, which reduces rebuild fan-out.

_config.dev.yml

@@ -0,0 +1,22 @@
+# Development-only overrides for faster local iteration.
+# The difference is it doesn't generate the redirects.
+# Use with: jekyll serve --config _config.yml,_config.dev.yml --livereload
+
+plugins:
+  - jekyll-include-cache
+
+whitelist:
+  - jekyll-include-cache
+
+# Keep local output lean.
+exclude:
+  - _site.backup
+  - templates
+  - node_modules
+  - tmp
+  - .cache
+  - .DS_Store
+  - scripts
+  - .github
+  - .git
+  - .vscode

_includes/video-carousel.html

@@ -1,7 +1,7 @@
-{% if page.videocarousel %}
+{% if include.videocarousel %}
 <section class="bg-inverse p-y-0">
     <div class="owl-carousel owl-slide owl-slide-no-auto">
-      {% for item in page.videocarousel %}
+      {% for item in include.videocarousel %}
         <div class="carousel-item" style="height: 70vh; background-image: url('{{ item.image }}');">
           <div class="carousel-overlay"></div>
           <div class="carousel-caption">

_layouts/404.html

@@ -73,6 +73,14 @@ <h5 class="widget-title">Recently Updated</h5>
 
   <script>
     (function () {
+      // Redirect trailing-slash URLs to the canonical no-slash version
+      // e.g. /snes/ → /snes  (fixes old permalink 404s)
+      if (window.location.pathname.length > 1 && window.location.pathname.endsWith('/')) {
+        var noSlash = window.location.pathname.slice(0, -1) + window.location.search + window.location.hash;
+        window.location.replace(noSlash);
+        return;
+      }
+
       var breadcrumbEl = document.getElementById('breadcrumb-topic');
       var relatedWrapper = document.getElementById('related-posts-wrapper');
       var relatedList   = document.getElementById('related-posts-list');

_layouts/post.html

@@ -14,7 +14,7 @@
 
   {% include_cached video-header.html youtube=page.youtube image=page.image %}
 
-  {% include video-carousel.html %}
+  {% include_cached video-carousel.html videocarousel=page.videocarousel %}
 
   <section>
     <div class="container post-container">

categories/companies/crossproducts.md

@@ -23,7 +23,6 @@ breadcrumbs:
 redirect_from:
   - /cross-products
   - /crossproducts
-  - /companies/crossproducts/
 editlink: ../categories/companies/crossproducts.md
 updatedAt: '2020-09-05'
 ---
@@ -95,7 +94,7 @@ We have a post all about Super Nintendo development kits which has a section on
 ### SNASM for Atari ST
 The Atari ST was one of the first platforms supported by the original SNASM development kit, it allowed developing on a PC and debugging on an Atari ST, with the main benefit being that crashes on the Atari didn't affect development compared to editing on the Atari ST itself.
 
-{% include link-to-other-site.html url="https://segaretro.org/SNASM68K" description="More information about SNASM Devkit Box for the Atari ST at Computing History." title="SNASM Devkit Box for the Atart ST - Peripheral - Computing History]" image="https://www.computinghistory.org.uk/userdata/images/large/83/67/product-118367.jpg"  %}
+{% include link-to-other-site.html url="https://segaretro.org/SNASM68K" description="More information about SNASM Devkit Box for the Atari ST at Computing History." title="SNASM Devkit Box for the Atart ST - Peripheral - Computing History" image="https://www.computinghistory.org.uk/userdata/images/large/83/67/product-118367.jpg"  %}
 
 ---
 # All Posts mentioning Cross Products