List Prolog Ideas

DCG trace
Number straight to codes, not via atom
Interpret numbers and words with DCGs not just their characters
Prefilled read line
Press return to return from Vi and other editors' one-line reading of input*
Save and exit Vi with one keystroke*
Swish Prolog file input and output
Control of screen coordinates, Deletion of text
MacVim compatibility*
Grammarly needs to save files on exit rather than do nothing after being run as the editor*
A better way to use other editors - The user may have trouble loading the SWI-Edit library, and the user would not use set_prolog_flag(editor..., edit_command and edit_source.

* - External

The SWI-Prolog manual is technical on second glance and perhaps needs more examples.

The user would be delighted to combine split string and read line for the desired effect (for example, inputting three comma-delimited numbers).

As an aside, I would like to suggest cloud or supported access to a similarity checker, an (international) dictionary, thesaurus, parts of speech, emphasis and other phonetic properties, n-grams, with ability to search for ones at start and end of sentences (machine learning) and reaching the defunct but necessary Google exact phrase search feature.  The user may try back-translation for stronger correctness and may like to access cloud translate (perhaps with readable grammars and vocabulary).