Generate social posts from GitHub pushes to Twitter and LinkedIn

On each GitHub push , this workflow checks if the commit set includes README.md and CHANGELOG.md , fetches both files, lets an LLM generate a Twitter and LinkedIn post, then publishes to Twitter and LinkedIn (Person).

Apps & Nodes

• Trigger: Webhook
• Logic: IF, Merge, Aggregate
• GitHub: Get Repository File (×2)
• Files: Extract from File (text) (×2)
• AI: OpenAI Chat Model → LLM Chain (+ Structured Output Parser)
• Publish: Twitter, LinkedIn (Person)

Prerequisites

• GitHub: OAuth2 or PAT with repo read.
• OpenAI: API key.
• Twitter: OAuth2 app with Read and Write ; scopes tweet.read tweet.write users.read offline.access.
• LinkedIn (Person): OAuth2 credentials; required scope: w_member_social, openid.

Setup

1. GitHub Webhook: Repo → Settings → Webhooks

   • Payload URL: https://<your-n8n-domain>/webhook/github/push
   • Content type: application/json • Event: Push • Secret (optional) • Branches as needed.

2. Credentials: Connect GitHub, OpenAI, Twitter, and LinkedIn (Person).

How it Works

1. Webhook receives GitHub push payload.
2. IF checks that README and CHANGELOG appear in added/modified.
3. GitHub (Get Repository File) pulls README.md and CHANGELOG.md.
4. Extract from File (text) converts both binaries to text.
5. Merge & Aggregate combines into one item with both contents.
6. LLM (OpenAI + Parser) returns a JSON with twitter and linkedin.
7. Twitter posts the tweet.
8. LinkedIn (Person) posts the LinkedIn text.