diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index 1f95a98..9061ca4 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -4,21 +4,19 @@ on:
   push:
     branches: [astro-platform-pilot]
   workflow_dispatch:
-    inputs:
-      site_key:
-        description: Site key to deploy to its non-production Worker
-        required: true
-        type: choice
-        options: [www, blog]
 
 jobs:
   preview:
-    name: Preview ${{ inputs.site_key || 'www' }}
+    name: Preview ${{ matrix.site_key }}
     runs-on: ubuntu-latest
     permissions:
       contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        site_key: [www, blog]
     env:
-      SITE_KEY: ${{ inputs.site_key || 'www' }}
+      SITE_KEY: ${{ matrix.site_key }}
       ASTRO_TELEMETRY_DISABLED: '1'
     steps:
       - name: Checkout source
diff --git a/docs/blog-preview.md b/docs/blog-preview.md
new file mode 100644
index 0000000..752cfd6
--- /dev/null
+++ b/docs/blog-preview.md
@@ -0,0 +1,13 @@
+# Blog preview deployment
+
+The `blog` site is an independently built and deployed static Astro site from
+the same root repository. Its non-production Worker is
+`3031023-xyz-blog-preview` and its workers.dev preview URL is published by
+Cloudflare after the pilot workflow completes.
+
+This preview has no custom domain, route, or production DNS record. The future
+`blog.3031023.xyz` attachment is a separate Phase 5 approval step that follows
+the accepted primary-domain cutover.
+
+The sample posts remain structured site data for this pilot. Markdown content
+collections and any editor/CMS workflow are explicitly deferred.