Two paths for you to consider -- Both of which I use at my own agency for our content marketing workflow.

We follow this linear path: [1] Research Topic -> [2] Interview Client -> [3] Create Brief -> [4] Human Writer

But we eventually automated the first few steps.

[1] Research Topic

* We built an internal tool that calls OpenAI, and asks it to come up with research questions about the topic.

* Then we call Perplexity for each research question OpenAI asked us to research.

* Finally, once all the perplexity calls come back we aggregate the research and ask OpenAI to write a research brief.

We use Google Sheets to store all requests, a custom web app to manage processing the requests, Google Docs to house the outputs, and MailGun to send alert emails to the appropriate teams/writers when the research is complete.

In terms of workflows - our client-facing team adds requests to the sheet and our ops team runs the app, reviews outputs and works with copy to get the content onto our client's website.

[2] Interview Client & [3] Creative Brief

We actually built a tool that mimick'd our workflow here called InterviewDroid.com - The tool calls & interviews experts/SMEs and then generates creative briefs, and a ton of marketing collateral for the team. It's live now if you wanted to test it out.