We have been doing something similar but it sounds like you have come further along this way of working. We (with help from Claude) have built a similar tool that you describe to interface with our task- and project management system, and use it together with the Gitlab and Github CLI tools to allow agents to read tickets, formulate a plan and create solutions and create MR/PR to the relevant repos. For most of our knowledge base we use Markdown but some of it is tied up in Confluence, that's why I have an interest in that part. And, some is even in workflows are in Google Docs which makes the OP tool interesting as well -- currently our tool output Markdown and we just "paste from markdown" into Gdocs. We might be able to revise and improve that too.
(Not OP, but have been looking into setting up a system for a similar use case)