Build a discord/Slack bot to answer questions with your docs and GPT4
It works on top of the open-source workflow engine windmill [1] that you can easily self-host on a tiny server or a large k8s cluster. You will also need pgvector (here hosted on supabase) and of course a GPT4 api key. It showcases an approval step so that you only provide answers you are confident giving to your users, which feels less robotic. All the building blocks are scripts that you can reuse outside of windmill and you could build this in any other workflow engines (although less conveniently). We use it for our own needs on discord [2] and thoughts this was a common need for any…
Build a discord/Slack bot to answer questions with your docs and GPT4 launched on June 29, 2023 with 144 votes, #289 of 4,655 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
This is a Discord and Slack bot template that answers user questions based on documentation using GPT-4. Built on the open-source Windmill workflow engine, it can be self-hosted on minimal or large infrastructure and requires pgvector and a GPT-4 API key. The bot includes an approval step so answers can be reviewed before sending, making responses feel less automated. All components are reusable scripts that can work in other workflow engines.
written from the facts on this page · September 2026
From the sources
Empower your support team with a bot that answers questions about technical documentation using Windmill, OpenAI, and Supabase. "Replace a SaaS" is a cheeky title for a blog series. We believe you don't always need a dedicated SaaS to solve a problem. You can often build your own minimal but tailored-to-your-needs solution on your own, and stop accumulating subscriptions. Today, we will create a bot that answers questions about technical documentation leveraging Windmill, OpenAI, and Supabase, with an approval step . To directly setup your own bot on Windmill (Self-hosted or cloud) or rather watch a video tutorial of the actual set-up, you can skip the following sections and go directly to…from windmill.dev
In the maker’s words, at launch
It works on top of the open-source workflow engine windmill [1] that you can easily self-host on a tiny server or a large k8s cluster. You will also need pgvector (here hosted on supabase) and of course a GPT4 api key. It showcases an approval step so that you only provide answers you are confident giving to your…
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