diff --git a/.github/workflows/blog-publish.yml b/.github/workflows/blog-publish.yml
index c03ff71..e61837a 100644
--- a/.github/workflows/blog-publish.yml
+++ b/.github/workflows/blog-publish.yml
@@ -57,6 +57,9 @@ jobs:
           ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
           MICROBLOG_APP_TOKEN: ${{ secrets.MICROBLOG_APP_TOKEN }}
           MICROBLOG_DESTINATION_UID: ${{ vars.MICROBLOG_DESTINATION_UID }}
+          # Comma-separated UIDs from GET /micropub?q=syndicate-to (linkedin, mastodon, bluesky, threads).
+          # Defaults to 'linkedin' if the repo variable is unset.
+          MICROBLOG_SYNDICATE_TO: ${{ vars.MICROBLOG_SYNDICATE_TO || 'linkedin' }}
           POST_PATH: ${{ steps.post.outputs.path }}
           BASE_URL: https://doughatcher.com
         run: node apps/editorial-loop/publish.js
diff --git a/apps/editorial-loop/lib/microblog-poster.js b/apps/editorial-loop/lib/microblog-poster.js
index 46c87d1..7f3a802 100644
--- a/apps/editorial-loop/lib/microblog-poster.js
+++ b/apps/editorial-loop/lib/microblog-poster.js
@@ -76,6 +76,17 @@ export async function postToMicroblog(text) {
   if (process.env.MICROBLOG_DESTINATION_UID) {
     params.append('mp-destination', process.env.MICROBLOG_DESTINATION_UID);
   }
+  // micro.blog requires per-post opt-in for syndication — it does NOT honor
+  // the account-level cross-post default for API-posted entries. Pass each
+  // destination UID as a separate mp-syndicate-to[] form field.
+  // Discover UIDs at GET /micropub?q=syndicate-to (e.g. "linkedin", "mastodon").
+  const syndicateTo = (process.env.MICROBLOG_SYNDICATE_TO || '')
+    .split(',')
+    .map(s => s.trim())
+    .filter(Boolean);
+  for (const uid of syndicateTo) {
+    params.append('mp-syndicate-to[]', uid);
+  }
 
   const res = await fetch('https://micro.blog/micropub', {
     method: 'POST',