Utf8JsonReader How to partial skip across buffers

Hi, I've been meaning to write a high performance low alloc way of reading an OpenAI chat/completions request body to scan for the

model

model

property. In many cases it appears at the start of a request body, before any prompts. So there is no point in reading the entire json document as prompts can have up to 1 million chars.

I came up with this: https://gist.github.com/bbartels/b37008a1bb6b2e0f6b462920b2c85140

And while it works, it only does if the document fits into the buffer. I waote a test where a property had a significant amount of data, and

.Skip

.Skip

would throw.

I've attempted to use

TrySkip

TrySkip

, but when that fails it resets the state of the reader back to before the skip. Is there a way to attempt a skip, but keep the reader state. Such that you can continue on the next chunk of the buffer?

Gist

OpenAIRequestInspector.cs

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