CSV and similar files, option to only include N lines

[danielfrg]

Sometimes its useful to pass a couple of lines of a CSV file to LLMs so they know the format, but longer CSVs takes a lot of context. Is there a way to do this already?
If not it might be something I might take a look on adding if it makes sense!

[yamadashy]

Currently this feature doesn't exist, but it would indeed be useful!

While it's possible to exclude files by setting maxFileSize in the input, there's no truncation feature available.

We would need to consider how to implement this distinctly from the existing maxFileSize setting.