linediff number-prefixed diff format

[dceluis]

Hi there,

Would a new diff format be of interest to the project?

I wanted to write a simple format that would allow me to simplify the line-matching logic. It took me a while to get it to work reliably on gpt-4o-mini (it's what I could extensively test with). More advanced models should be able to comply without such a huge system prompt.

Pros:

• Simple rules by leveraging LLMs recitation capabilities.
• Client-side: Simpler line matching logic.

Cons:

• More verbose, although a lot of that is the big system reminder I had to add so that 4o-mini followed the specification.

You can also have a look at https://github.com/dceluis/ln-diff for a deeper look into the decisions behind the format.

Benchmark for context:

I understand the implementation is nowhere near mergeable but I figured I might show it anyways for easier consideration.

Cheers!

[CLAassistant]

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