# Review GitHub pull requests with Slack: n8n workflow template

> Started by an event in a connected app, and works across Postgres. 10 steps, 1 branch: a working afternoon to understand properly.

Source: https://millionrounds.com/workflow/review-github-pull-requests-with-slack (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Content](https://millionrounds.com/workflows?category=Content#library)

# Review GitHub pull requests with Slack

Started by an event in a connected app, and works across Postgres. 10 steps, 1 branch: a working afternoon to understand properly.

Medium

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Freview-github-pull-requests-with-slack)

**10 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**1** Service it connects to

## The flow

Starts it 1 Logic 5 Service 4

The steps in the order they run, from what starts it.

- 1 **GitHub Webhook - PR Events** Github trigger *Starts it*
- 2 **Fetch Changed Files in PR** Http Request *Service*
- 3 **Merge PR Details and Files** Merge *Logic*
- 4 **Extract Code Diffs** Code *Logic*
- 5 **Score Review & Categorize Issues** Code *Logic*
- 6 **Route by Review Severity** Switch *Logic*
- 7 **Post Review to GitHub PR** Http Request *Service*
- 8 **Store Review Results in PostgreSQL** Postgres *Service*
- 9 **Send Summary to Slack** Http Request *Service*
- 10 **Log Review Completion** Code *Logic*

## How it's built

- **Starts on:** An event in a connected app
- **Steps:** 10, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Postgres
- **Model:** None. This is plumbing, not judgement

## Questions

What does it need to run?

An n8n account, plus your own Postgres account. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an event in a connected app.

Does it use AI?

No. Every step is fixed logic or a call to a service, so it does the same thing every time.

How long does it take to set up?

Plan an afternoon. 10 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 10 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Freview-github-pull-requests-with-slack)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Postgres](https://millionrounds.com/workflows?service=Postgres#library)

## Workflows like it

Also content, with the same services where possible, closest in size first.

- [**Breaking news aggregator with SendGrid and PostgreSQL** 10 steps · Postgres, SendGrid](https://millionrounds.com/workflow/breaking-news-aggregator-with-sendgrid-and-postgresql)
- [**Recover abandoned onboarding users with Postgres and Gmail** 10 steps · Gmail, Postgres](https://millionrounds.com/workflow/recover-abandoned-onboarding-users-with-postgres-and-gmail)
- [**Export AI agent conversation logs from Postgres to Google Sheets** 11 steps · Google Sheets, Postgres](https://millionrounds.com/workflow/export-ai-agent-conversation-logs-from-postgres-to-google-sh)
- [**Ingredient price trend analysis & buying recommendations** 11 steps · Email, Postgres](https://millionrounds.com/workflow/ingredient-price-trend-analysis-and-buying-recommendations)
- [**Prevent duplicate webhook processing with Postgres** 9 steps · Postgres](https://millionrounds.com/workflow/prevent-duplicate-webhook-processing-with-postgres)
- [**Build a personalized birthday AI companion with OpenAI** 9 steps · calls a model · Postgres](https://millionrounds.com/workflow/build-a-personalized-birthday-ai-companion-with-openai)