This is a working cookbook of n8n + Posta workflow patterns for social-media automation. The first four are ready-to-fork templates — open the workflow page, grab the JSON, swap your credentials in. The next eight are buildable patterns: the trigger, the LLM step (if any), and the Posta node shape you'd wire up. Each one is short on purpose; the actual templates are linked where they exist, and the rest are deliberately simple enough to build in an afternoon.
Four templates ready to fork
1. Blog post → social media
Trigger: RSS feed of your blog. LLM step: draft a caption per platform. Posta node: Create Post (multi-account, scheduled). Use case: the canonical "auto-promote every post." Open the template →
2. Blog post → LinkedIn carousel
Trigger: manual or RSS. LLM step: summarise the article into slide copy. Posta node: generate LinkedIn carousel (Posta composites the PDF and ships it to LinkedIn's document API). Use case: long-form articles deserve more than a single LinkedIn post. Open the template →
3. Product launch → 5-day multi-platform campaign
Trigger: manual. LLM step: draft per-platform copy for each day. Posta node: schedule the whole sequence (5 days × N platforms). Use case: turning one launch into a sustained campaign without manual scheduling. Open the template →
4. YouTube video → multi-platform promo
Trigger: YouTube channel feed. LLM step: draft a promo caption per platform. Posta node: Create Post per network, all scheduled. Use case: the cross-poster every YouTuber wishes they'd set up earlier. Open the template →
Eight patterns you can build today
5. Podcast episode → multi-platform repurpose
Trigger: podcast RSS feed. Steps: Whisper (or your transcription provider) → LLM to pick a highlight quote → image generator for the quote card → Posta Create Post. The interesting variant: ask the LLM for three different highlights, then schedule each one for a different day.
6. GitHub release → changelog posts
Trigger: GitHub webhook on release published. Steps: LLM reads the release notes → drafts an engineering-tone post for LinkedIn and a punchier one for Bluesky → Posta Create Post on both. Bonus: only post if the release tag isn't a pre-release.
7. Customer testimonial → social proof posts
Trigger: Typeform / Tally form submission, or a new row in a customer-feedback table. Steps: LLM reformats the quote with attribution → image generator drops it on a branded background → Posta Create Post (draft, so you can review for sensitivity before publishing).
8. Webhook → auto-comment-reply pipeline
Trigger: Posta outbound webhook (post.published). Steps: Posta returns the platform post URL → fetch comments via the Posta comments API → LLM drafts a reply for any new comment matching a pattern → Posta Create Comment Reply (LinkedIn / TikTok). Closes the loop on your own posts. Pattern walked through in webhook-driven social media agent loops.
9. Slack message → social broadcast
Trigger: Slack reaction on a message (e.g. :megaphone:). Steps: LLM rewrites the Slack content in social voice → Posta Create Post on the team's connected accounts. Good for "we shipped this" announcements without leaving Slack.
10. Calendar event → live-tweet thread
Trigger: Calendar event (Google Calendar trigger node). Steps: at event start, LLM drafts the opening of a thread → at event mid-point and end, LLM drafts continuation posts → Posta Create Post each time. Works for product launches, demo days, and live streams.
11. Daily digest → multi-platform morning post
Trigger: n8n Schedule (cron). Steps: fetch top stories from your RSS bundle or news API → LLM picks one and writes a thoughtful comment → Posta Create Post scheduled for your audience's peak hour. The "you have an opinion about today's news" workflow.
12. Stripe payment → "look who joined" social proof
Trigger: Stripe webhook on customer.subscription.created. Steps: LLM drafts a (consented, anonymised) "another team chose us" post → Posta Create Post as a draft (so you can review). The privacy-first version: aggregate weekly and post a "10 teams joined this week" digest.
What every pattern shares
Notice the shape — every workflow is some variation on trigger → context → LLM → Posta. The Posta node is always the last step, and it's always one node regardless of how many platforms you fan out to. That's what makes n8n + Posta cheap to operate vs. per-task pricing models: see replace Zapier social media with n8n + Posta for the cost math.
Where to go from here
Fork one of the four templates from the workflow gallery, then bookmark this page as a buildable list for the rest. For the agent-driven version of these patterns (LLM in the orchestration seat, not just one step), see agentic social media workflows. 14-day free Posta trial, no credit card.