Engineering benefits of JSON-only ReAct action format

[pleasenopressure]

Thanks for the great Agent tutorial
I've been implementing a ReAct - Style agent service recently and want to share an engineering observation for discussion.
In many ReAct example ,the model outputs actions in free-text formats like :
Thought: ...
Action: search
Action Input: ...
This is good for learning ,but I found some inconvenience when something is wrong and I am trying to debug.
So In my implementation, I enforce a JSON-only fomats which can be logged,traced and replayed easily.
Of course, this also introduces stricter constraints on the model, and requires stronger prompt discipline.
Happy to contribute a short note or example if it’s useful.

Thanks again for the project!