From b0fb05f93ac8db4627207b4e68bc03024f2e0c18 Mon Sep 17 00:00:00 2001
From: Doug Hatcher <doug@hatcher.ltd>
Date: Mon, 18 May 2026 21:01:28 -0400
Subject: [PATCH] fix(blog-publish): pass mp-syndicate-to to actually
 cross-post to LinkedIn

micro.blog's Micropub API does NOT honor the account-level cross-post
defaults for API-posted entries. Each post must explicitly opt in via
mp-syndicate-to[]=<uid>. Without it, the note lands on the timeline but
LinkedIn/Mastodon/Bluesky/Threads stay silent.

- microblog-poster.js: read MICROBLOG_SYNDICATE_TO (comma-separated UIDs)
  and emit one mp-syndicate-to[]= field per destination.
- blog-publish.yml: default MICROBLOG_SYNDICATE_TO=linkedin if the repo
  variable is unset. Override by setting vars.MICROBLOG_SYNDICATE_TO
  (e.g. "linkedin,bluesky").

Discover available UIDs at GET https://micro.blog/micropub?q=syndicate-to.
---
 .github/workflows/blog-publish.yml          |  3 +++
 apps/editorial-loop/lib/microblog-poster.js | 11 +++++++++++
 2 files changed, 14 insertions(+)

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',