Elixir GPT Slack Bot

Slackbot written in Elixir or act on the content of slack messages with ChatGPT

Originally written to summarize the content of a slack thread: Invite it to a channel, then mention it (in a thread) and it will generate a summary of what has been said

See "Other fun things you can do" for inspiration

Installation

Create a new slack app, go to manifests and paste this manifest:

{
    "display_information": {
        "name": "Thread Summarizer",
        "description": "Hi, I can summarize threads for you!",
        "background_color": "#1a3891",
        "long_description": "Mention me in a thread, and I will try to give you a concise summary of what has been said. I may not always be correct, but I hope I can help you anyway!\r\n\r\nUsage:\r\n- Invite me to a channel\r\n- In a thread, @Thread Summarizer mention me"
    },
    "features": {
        "bot_user": {
            "display_name": "Thread Summarizer",
            "always_online": true
        }
    },
    "oauth_config": {
        "scopes": {
            "user": [
                "channels:history"
            ],
            "bot": [
                "app_mentions:read",
                "channels:history",
                "channels:join",
                "chat:write",
                "chat:write.customize",
                "chat:write.public",
                "commands",
                "groups:history",
                "reactions:read",
                "reactions:write",
                "users:read"
            ]
        }
    },
    "settings": {
        "event_subscriptions": {
            "bot_events": [
                "app_mention",
                "message.channels",
                "reaction_added"
            ]
        },
        "interactivity": {
            "is_enabled": true
        },
        "org_deploy_enabled": false,
        "socket_mode_enabled": true,
        "token_rotation_enabled": false
    }
}

Next, click on "Basic Information", scroll down to "App-Level Tokens". This is your slack_app_token.

Click on "OAuth & Permission", install the app into your workspace, then copy the "Bot User OAuth Token". This is your slack_web_token

runtime.exs is setup to read those from the environment, so set the following env keys:

config :summarizer,
  slack_app_token: System.get_env("SLACK_APP_TOKEN"),
  slack_web_token: System.get_env("SLACK_WEB_TOKEN")

config :ex_openai,
  api_key: System.get_env("OPENAI_API_KEY"),
  organization_key: System.get_env("OPENAI_ORGANIZATION_KEY"),
  http_options: [recv_timeout: 50_000]

In config.exs, you have the option to change the prompt used, or to enable whether to also respond to normal @mentions outside of threads.

That's it!

Usage

Start it with mix

Tweaking

Tweak the prompt in config.exs
To make the bot more random, go into chatgpt.ex and change the temperature setting: temperature: 0.6. A higher temperature is more randomness, a lower temperature is more predictable

Deploy to fly.io

Included is a simple fly.toml file that lets you deploy the bot to https://fly.io

Change app = "mybot" in fly.toml
Run fly launch
Set env variables with fly secrets set XXX=YYY

Other fun things you can do

Change the prompt and enable enable_normal_mentions to create a sassy snark chatbot, fun for the whole family

alessiomaffeis / gpt-slack-bot