There are so many! Personally, I’ve been able to get remarkably far with the built-in filesystem tools (courtesy of DeepAgents) paired with a web search MCP (Kagi is great!). Were there any particular workflows you had in mind?
Other than that, I like to insert agents into deterministic workflows, so some way to easily have deterministic steps (calling a script rather than delegating to an agent, but determined by the workflow rather than the agent). However this second one is likely out of scope for a while, since it is the inverse of the typical agent workflow. I could probably work this out clunkily by polling the cli from an external master script, but it would be cool to have it all inside the box.