Claude Code all the way although they are for two entirely different things. I use Claude Code to build the tthis and Claude Co-work to complete the task/workflow. For instance I'll use Claude Chat to toss ideas back and forth and then Opus will produce two briefs. One for co-work - I needed it to use the browser specifically to go through a few hundred links and pull relevant data on a new project I'm researching. I let it go for three hours while I was at work. It downloaded all the data necessary for the build, collated it into folders, and wrote manifests, logs, and structured findings and analysis in a handover for Fable (I have a co-work brief skill that Opus uses). And Claude Chat will also produce the design brief for Fable (I have another skill for this). Fable then can use all the research gathered by co-work for the build. Note that not all research will need to be done by co-work. Sometimes it's much cheaper to get fable to spin up cheap minions but if you need some reasoning and analysis to go into it then co-work is a good answer. Fable's brief specifies: - the human problem - my vision for what I'm trying to achieve - what done looks like - gives it some edge cases that need to be accounted for - reminds it that it is the architect and not the bricklayer so it can orchestrate and delegate tasks as necessary to the most suitable agent, with consideration to required output and token economy. And then I give it room to do what it does best, which is come up with the best solution to my problem and build it.