Uploaded plain text files are evidently consumed via a file_editor tool. This tool arbitrarily wraps long text lines, which makes it impossible to discuss source code by line number, which led to a very frustrating 30-minute session where the assistant INSISTED (and showed me) that line 112 began with what I knew to be the end of line 111.
PS: The alternative file reader, librarian is non-deterministic: it summarizes or condenses the uploaded file, so it's useless for manipulating or understanding source code.
The file_editor should preserve every aspect of the uploaded file without modifying it in any way, OR, if file_editor is intended (as its very name suggests), to allow editing an uploaded file, then please give the user a file_reader tool that is a read-only alternative to file_editor, and use THAT by default if the user is not obviously asking the assistant to modify the file.