Slack ChatGPT Bot

This document was written by ChatGPT and directed by Aaron Ng (@localghost).

Introduction

This script creates a Slack bot that uses ChatGPT to respond to direct messages and mentions in a Slack workspace. It functions as a general question-answering bot for your company.

Environment Variables

Required:

1. OPENAI_API_KEY: Your OpenAI API key, which starts with "sk-".
2. SLACK_APP_TOKEN: Your Slack App Token, which starts with "xapp-".
3. SLACK_BOT_TOKEN: Your Slack Bot Token, which starts with "xoxb-".

Optional:

1. MODEL: The OpenAI model to use. Can be "gpt-3.5-turbo" or "gpt-4". Default is "gpt-3.5-turbo".
2. PROMPT: A custom prompt for the bot. Default is a predefined prompt for a friendly company assistant.

Setup

1. Go to https://api.slack.com/apps?new_app=1.
2. Click "Create New App".
3. Click "Basic", then name your Slack bot and select a workspace.

Configuration

1. In "Settings" → "Socket Mode", enable both Socket Mode and Event Subscriptions.
2. In "Settings" → "Basic Information", install your app to the workspace by following the instructions.
3. In "Settings" → "Basic Information", scroll to "App-Level Tokens" and create one with the permission connections:write. Set the resulting token that starts with xapp- as your SLACK_APP_TOKEN.
4. In "Features" → "OAuth and Permissions", copy the "Bot User OAuth Token" and set it as the SLACK_BOT_TOKEN in your environment.
5. In "Features" → "OAuth and Permissions" → "Scopes", add the following permissions: app_mentions:read, channels:history, channels:read, chat:write, chat:write.public, groups:history, groups:read, im:history, im:read, mpim:history, mpim:read, users:read.
6. In "Features" → "Event Subscriptions" → "Subscribe to Bot Events", add the following bot user events: app_mentions:read, message.im.
7. In "Features" → "App Home", turn on the "Messages Tab" switch, and enable the Allow users to send Slash commands and messages from the messages tab feature.

Now your Slack bot should be ready to use!

Deployment

Cloud Deployment:

1. If deploying to a cloud service, check out and reconfigure setup.sh and start.sh.

Local Deployment:

1. If running locally, install dependencies with poetry.
2. Comment out these two lines in the script:

# from dotenv import load_dotenv
# load_dotenv()

Start the bot and enjoy using it in your Slack workspace.