New Feature: TOON Integration

[Trikos]

---

name: Feature request
about: Suggest an idea for this project

---

Hello Microsoft :)

I’d like to suggest evaluating support for TOON (Token-Oriented Object Notation) as an optional structured format in Semantic Kernel .NET.

TOON is a compact, human-readable, lossless representation of JSON designed for LLM input, and it seems potentially useful for scenarios where SK currently serializes structured data into prompts using JSON.

A possible approach could be to expose a pluggable formatter/serializer for structured prompt data, so developers can choose between JSON, TOON, or custom formats depending on the use case.

This could be helpful for:

• prompt rendering of structured variables
• tool/function arguments
• intermediate planner data
• reducing prompt size for structured inputs
• be able to call more functions tool

If core support feels too early, an experimental extension package could also make sense.

Would the team be open to this kind of integration or extension point?

Thanks.