Slack AI ChatBot : Context-Aware, Replies to Mentions AND also DMs

Description

Click here to access this Workflow for free.

Get your own custom ChatGPT inside your Slack Workspace

Description
This n8n workflow enables a fully autonomous AI assistant within your Slack Workspace. It listens for both public mentions and direct messages (DMs), and replies in real-time using a large language model (OpenAI's GPT-4o by default). The assistant can dynamically fetch previous messages for better context, providing smart, coherent, and personalized responses.

🔧 Key Features

Dual Trigger**: Reacts to both public bot mentions and private DMs.
Context-Aware AI**: Dynamically fetches the last 20 messages from either public or private conversations.
Smart Routing**: Replies either in the original public channel or via DM, depending on where the message came from.
Custom Prompting**: Easily modify the system prompt to define the AI’s tone, behavior, and personality.
Fully Autonomous**: No manual intervention required — the bot always replies instantly.

✅ Requirements

An operational n8n instance.
A Slack workspace (you can create one for free here)
A Slack account with Admin or Owner privileges (required to install apps)

🧰 Setup Instructions

Slack Bot Setup
Create a Slack App with the necessary permissions and configurations
> You will find in the next step a complete tutorial to craft your own bot with the right confirguration and permissions for this workflow to work
Set your Slack bot token in n8n's credential manager.

🤖 How It Works

When a public mention is detected, the bot replies directly in the channel, referencing the original message.
When a DM is received, it responds privately.
The AI uses a tool to read the latest 20 public or private messages to build accurate context before replying.

🛠 Customization Options

Change LLM**: Swap out OpenAI with any LLM that has an API.
Edit Prompt Behavior**: Modify the system prompt to control tone and personality.

If you just need a tutorial on setting up your Slack bot, be my guest ➡️ Here

And if you need any help, or have any question, feel free to come discuss about it on Telegram