Auto-post new blog content to social media on publish

A content team describes their process like this: "When a blog post is published on
WordPress, I want it automatically posted to our LinkedIn company page and X account
with the title, a short excerpt, the featured image, and a link back to the post."

AVAILABLE TOOLS: [WordPress publish event (trigger), Uncanny Automator, LinkedIn, X
(Twitter)]

Turn this into an implementation-ready automation recipe, thinking through what the
plain description leaves ambiguous:
1. Trigger: the exact event to fire on, since WordPress fires a "publish" transition
   both for a brand-new post and for an old post being republished or updated. Decide
   whether updates should re-post or be excluded entirely.
2. Conditions: what happens when a post is scheduled for the future and published
   automatically by WordPress's cron at 3am. Should the social post fire immediately,
   or is there a business reason to delay it to a normal posting-hours window.
3. Actions in order: pull the featured image (with a fallback to a default brand
   image if none is set, since a caption with a broken image link looks worse than no
   image), truncate the excerpt to fit X's character limit without cutting a word
   mid-way, then post to LinkedIn first and X second so a partial failure doesn't
   leave X live without the LinkedIn version.
4. Failure handling: if the X post fails due to a rate limit but LinkedIn succeeds,
   should the recipe retry X alone, and how many times before alerting the content
   team via Slack or email.
5. One edge case specific to this exact workflow: a post published in a category
   tagged "internal" or "draft-notes" that should never go to social. Confirm the
   recipe checks category before posting, not just publish status.

Replace the workflow description and available tools with your own.