Docs

https://docs.llamaindex.ai/en/stable/examples/agent/custom_agent/

But also tbh, i would just skip the agent worker/runner and just use a workflow

If you haven't seen workflows
https://docs.llamaindex.ai/en/stable/module_guides/workflow/#workflows

Theres an example of a react agent and function calling agent there.

I also have my own custom agent here that uses contextual system prompts and async streaming
https://colab.research.google.com/drive/1wVCkvX7oQu1ZwrMSAyaJ8QyzHyfR0D_j?usp=sharing

Thanks Logan. Will go through it