ChatGPT
ChatGPT, answering from what your team knows.
Your own records in the chat, not pasted in by hand.
ChatGPT is very good at the conversation in front of it and knows nothing about your work unless you paste it in. That is fine once and tedious every day after.
A gbrain workspace gives it a place to look things up: the mail thread, the meeting note, the page somebody wrote last quarter. It reads through the same MCP connection everything else here uses, with the tools you chose and a token you can take back.