Jakmaroli/Slack-Agent-Builder ? reverse-engineered prompt

Build me a Slack bot that people can @mention in a channel and ask things like “why did we decide Postgres” or “has this come up before”. It should search our workspace history, find the most relevant old thread, and answer in a short helpful way with a clear citation back to the original message or thread so I can click through and check the source.

I want it to work in Slack without needing a public web URL, and it should be fine to run in a mock demo mode first so I can test it before connecting a real workspace. If you need to, look up the current Slack and Gemini docs online and make sure the setup is actually valid. Also add a simple Home tab or nice response card in Slack so the answer looks polished, not just plain text.