diff --git a/.prettierrc.cjs b/.prettierrc.cjs
index 1c2ef06a..f1c0ff85 100644
--- a/.prettierrc.cjs
+++ b/.prettierrc.cjs
@@ -12,5 +12,12 @@ module.exports = {
                 parser: "go-template",
             },
         },
+        {
+            files: [".vscode/*.json"],
+            options: {
+                parser: "jsonc",
+                trailingComma: "all",
+            },
+        },
     ],
 }
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 00000000..661b8920
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,3 @@
+{
+    "recommendations": ["budparr.language-hugo-vscode"],
+}
diff --git a/assets/main.scss b/assets/main.scss
index 72a2bf4b..daf32c29 100644
--- a/assets/main.scss
+++ b/assets/main.scss
@@ -2967,7 +2967,9 @@ body {
 .command-icon {
     width: 32px;
     height: 32px;
+    appearance: none;
     background-color: #ccc;
+    border: none;
     border-radius: 50%;
     display: flex;
     justify-content: center;
diff --git a/config.toml b/config.toml
index b1912d03..ed57437b 100644
--- a/config.toml
+++ b/config.toml
@@ -1,5 +1,5 @@
 baseURL = "https://scverse.org/"
-languageCode = "en-us"
+locale = "en-us"
 title = "scverse"
 description = "Foundational tools for omics data in the life sciences"
 
@@ -12,6 +12,10 @@ enableRobotsTXT = true
 images = ["img/scverse-social-card.png"]
 description = "Foundational tools for omics data in the life sciences"
 
+# No content uses tags or categories, so turn off Hugo's built-in taxonomies:
+# they only generated empty /tags/ and /categories/ pages and a missing-template warning.
+[taxonomies]
+
 [outputs]
 home = ["html", "rss", "entities"]
 
diff --git a/layouts/blog/rss.xml b/layouts/blog/rss.xml
index 09b80762..4ce0a06a 100644
--- a/layouts/blog/rss.xml
+++ b/layouts/blog/rss.xml
@@ -16,7 +16,7 @@
     <title>{{ if eq  .Title  .Site.Title }}{{ .Site.Title }}{{ else }}{{ with .Title }}{{.}} on {{ end }}{{ .Site.Title }}{{ end }}</title>
     <link>{{ .Permalink }}</link>
     <description>Recent {{ .Site.Title }} news</description>
-    {{ with .Site.LanguageCode }}
+    {{ with .Site.Language.Locale }}
     <language>{{.}}</language>{{end}}{{ with .Site.Copyright }}
     <copyright>{{.}}</copyright>{{end}}{{ if not .Date.IsZero }}
     <lastBuildDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</lastBuildDate>{{ end }}
diff --git a/layouts/events/rss.xml b/layouts/events/rss.xml
index 09b80762..4ce0a06a 100644
--- a/layouts/events/rss.xml
+++ b/layouts/events/rss.xml
@@ -16,7 +16,7 @@
     <title>{{ if eq  .Title  .Site.Title }}{{ .Site.Title }}{{ else }}{{ with .Title }}{{.}} on {{ end }}{{ .Site.Title }}{{ end }}</title>
     <link>{{ .Permalink }}</link>
     <description>Recent {{ .Site.Title }} news</description>
-    {{ with .Site.LanguageCode }}
+    {{ with .Site.Language.Locale }}
     <language>{{.}}</language>{{end}}{{ with .Site.Copyright }}
     <copyright>{{.}}</copyright>{{end}}{{ if not .Date.IsZero }}
     <lastBuildDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</lastBuildDate>{{ end }}
diff --git a/layouts/index.html b/layouts/index.html
index 2c66b13c..c5be35d8 100644
--- a/layouts/index.html
+++ b/layouts/index.html
@@ -21,10 +21,10 @@
               <div class="interactive-card" id="interactive-card">
                 <div class="demo-header">
                   <div class="command-input" id="cmd1">
-                    <div
+                    <button
                       class="command-icon"
                       id="run-cmd1"
-                      role="button"
+                      type="button"
                       tabindex="0"
                       aria-label="Run import scanpy as sc"
                     >
@@ -33,16 +33,16 @@
                           d="M361 215C375.3 223.8 384 239.3 384 256C384 272.7 375.3 288.2 361 296.1L73.03 472.1C58.21 482 39.66 482.4 24.52 473.9C9.377 465.4 0 449.4 0 432V80C0 62.64 9.377 46.63 24.52 38.13C39.66 29.64 58.21 29.99 73.03 39.04L361 215z"
                         />
                       </svg>
-                    </div>
+                    </button>
                     <div class="command-text">import scanpy as sc</div>
                     <div class="command-status" id="status-cmd1"></div>
                     <div class="executing-animation" id="exec-anim-1"></div>
                   </div>
                   <div class="command-input" id="cmd2">
-                    <div
+                    <button
                       class="command-icon"
                       id="run-cmd2"
-                      role="button"
+                      type="button"
                       tabindex="0"
                       aria-label="Run sc.pl.umap(data, color='clusters')"
                     >
@@ -51,7 +51,7 @@
                           d="M361 215C375.3 223.8 384 239.3 384 256C384 272.7 375.3 288.2 361 296.1L73.03 472.1C58.21 482 39.66 482.4 24.52 473.9C9.377 465.4 0 449.4 0 432V80C0 62.64 9.377 46.63 24.52 38.13C39.66 29.64 58.21 29.99 73.03 39.04L361 215z"
                         />
                       </svg>
-                    </div>
+                    </button>
                     <div class="command-text">sc.pl.umap(data, color='clusters')</div>
                     <div class="command-status" id="status-cmd2"></div>
                     <div class="executing-animation" id="exec-anim-2"></div>
diff --git a/layouts/packages/list.html b/layouts/packages/list.html
index 2c8e7d39..dcc87756 100644
--- a/layouts/packages/list.html
+++ b/layouts/packages/list.html
@@ -6,18 +6,11 @@ <h1>{{ .Title }}</h1>
       <article class="post">
         {{ $sections := index .Params.sections 0 }}
         <div class="post-content" id="packages-content">
-          {{ $registryBase := "https://scverse.org/ecosystem-packages/" }}
-          {{ $data := resources.GetRemote (printf "%spackages.json" $registryBase) }}
-          {{ $pkgs := transform.Unmarshal $data.Content }}
+          {{ $registry := partialCached "registry.html" "registry" }}
+          {{ $registryBase := $registry.base }}
+          {{ $pkgs := $registry.pkgs }}
 
-          {{/* ponytail: registry has no order key, so core packages are alphabetical; re-curate once one exists. */}}
-          {{ $core := slice }}
-          {{ range where $pkgs "category" "in" (slice "core-datastructure" "core-framework") }}
-            {{ $core = $core | append (merge . (dict "sortkey" (lower .name))) }}
-          {{ end }}
-          {{ $core = sort $core "sortkey" }}
-
-          {{ with $core }}
+          {{ with $registry.core }}
             <h2 id="core-packages">Packages maintained by core team</h2>
             {{ $sections.core_packages | markdownify }}
             {{ with where . "category" "core-datastructure" }}
@@ -54,8 +47,7 @@ <h2 id="ecosystem">Ecosystem packages maintained by scverse community</h2>
             {{ range $pkgs }}
               {{ $tags := .tags | default slice }}
               {{ $category := .primary_category | default "" }}
-              {{/* core-infrastructure is the scverse repos themselves, not packages, so it does not count here. */}}
-              {{ $core := in (slice "core-framework" "core-datastructure") (.category | default "") }}
+              {{ $isCore := in $registry.coreCategories (.category | default "") }}
               {{ if and $category (not (in $categories $category)) }}
                 {{ $categories = $categories | append $category }}
               {{ end }}
@@ -63,8 +55,7 @@ <h2 id="ecosystem">Ecosystem packages maintained by scverse community</h2>
               {{ $desc := trim (.description | markdownify | plainify | htmlUnescape | replaceRE `\s+` " ") " " }}
               {{ $search := lower (printf "%s %s %s %s %s" .name $desc (delimit $tags " ") $category .language) }}
               {{ $items = $items | append (merge . (dict
-                "sortkey" (printf "%s %s" (cond $core "0" "1") (lower .name))
-                "core" $core
+                "core" $isCore
                 "normtags" $tags
                 "category" $category
                 "language" .language
@@ -73,7 +64,6 @@ <h2 id="ecosystem">Ecosystem packages maintained by scverse community</h2>
                 ))
               }}
             {{ end }}
-            {{ $items = sort $items "sortkey" }}
 
             {{/* Chip row: every category in the schema that is actually in use, biggest first. */}}
             {{ $categoryCounts := slice }}
diff --git a/layouts/partials/main/packages.html b/layouts/partials/main/packages.html
index af633c93..fc1794fb 100644
--- a/layouts/partials/main/packages.html
+++ b/layouts/partials/main/packages.html
@@ -1,43 +1,35 @@
 <section id="packages">
   <div class="section-heading">Core packages</div>
   <div class="section-content">
-    {{ $registryBase := "https://scverse.org/ecosystem-packages/" }}
-    {{ $data := resources.GetRemote (printf "%spackages.json" $registryBase) }}
-    {{ with $data }}
-      {{/* ponytail: registry has no order key, so core packages are alphabetical; re-curate once one exists. */}}
-      {{ $core := slice }}
-      {{ range where (transform.Unmarshal .Content) "category" "in" (slice "core-datastructure" "core-framework") }}
-        {{ $core = $core | append (merge . (dict "sortkey" (lower .name))) }}
-      {{ end }}
-      {{ with sort $core "sortkey" }}
-        <div class="row" id="packages-list">
-          {{ range $p := . }}
-            <div class="col-xs-12 col-sm-12 col-md-12 col-lg-6 py-3">
-              <div class="card border-0 bh-light px-3" id="{{ .name | urlize }}-tile">
-                <div class="package-icon my-4">
-                  {{ with .logo }}
-                    <img src="{{ printf "%s%s" $registryBase . }}" alt="Logo for {{ $p.name }}" />
-                  {{ end }}
-                </div>
-                <div class="card-body package-text p-2">
-                  <a
-                    href="{{ .documentation_home | default .project_home }}"
-                    class="stretched-link"
-                    target="_blank"
-                    aria-label="Link to the {{ .name }} website"
-                  ></a>
-                  <h5 class="card-title mb-1 package-name">
-                    {{ .name }}
-                  </h5>
-                  <p class="card-text package-desc">
-                    {{ .description }}
-                  </p>
-                </div>
+    {{ $registry := partialCached "registry.html" "registry" }}
+    {{ with $registry.core }}
+      <div class="row" id="packages-list">
+        {{ range $p := . }}
+          <div class="col-xs-12 col-sm-12 col-md-12 col-lg-6 py-3">
+            <div class="card border-0 bh-light px-3" id="{{ .name | urlize }}-tile">
+              <div class="package-icon my-4">
+                {{ with .logo }}
+                  <img src="{{ printf "%s%s" $registry.base . }}" alt="Logo for {{ $p.name }}" />
+                {{ end }}
+              </div>
+              <div class="card-body package-text p-2">
+                <a
+                  href="{{ .documentation_home | default .project_home }}"
+                  class="stretched-link"
+                  target="_blank"
+                  aria-label="Link to the {{ .name }} website"
+                ></a>
+                <h5 class="card-title mb-1 package-name">
+                  {{ .name }}
+                </h5>
+                <p class="card-text package-desc">
+                  {{ .blurb }}
+                </p>
               </div>
             </div>
-          {{ end }}
-        </div>
-      {{ end }}
+          </div>
+        {{ end }}
+      </div>
     {{ end }}
     <a href="/packages">
       <div class="more">View all scverse packages</div>
diff --git a/layouts/partials/registry.html b/layouts/partials/registry.html
new file mode 100644
index 00000000..5b80adf6
--- /dev/null
+++ b/layouts/partials/registry.html
@@ -0,0 +1,12 @@
+{{/* The ecosystem package registry: base URL (logos are relative to it), all packages, and the core subset. */}}
+{{ $base := "https://scverse.org/ecosystem-packages/" }}
+{{ $data := resources.GetRemote (printf "%spackages.json" $base) }}
+{{ $pkgs := transform.Unmarshal $data.Content }}
+{{/* core-infrastructure is the scverse repos themselves, not packages, so it is not a core category here. */}}
+{{ $coreCategories := slice "core-datastructure" "core-framework" }}
+{{ return dict
+  "base" $base
+  "pkgs" $pkgs
+  "coreCategories" $coreCategories
+  "core" (where $pkgs "category" "in" $coreCategories)
+}}