Expand/restart completion when input shortened beyond original

[toy]

I'm wondering if it is possible to make fzf-tab to restart completion if I shorten the input beyond the input after which I triggered completion?

For example if I type gr<TAB>, I get list of commands/variables/functions/… starting with gr, I can filter this list by typing more, but if I reduce it to g, I still see only the list starting with gr. So I would like it to behave as if I cancelled the completion, removed last character and triggered the completion again.

[cookesan]

There is no built-in mode for "rerun completion when the fzf query becomes shorter than the original completion prefix."

The reason is that fzf-tab first asks zsh's normal completion system for candidates, then passes that fixed candidate list to fzf. So after gr<Tab>, the candidate set is already the gr... set. Deleting fzf's query down to g only filters that existing set; it does not ask zsh for a new g... completion set.

There is a continuous-trigger feature, default /, but that is an explicit trigger for continuing completion, mostly useful for path completion. It is not a general reload-on-backspace mechanism.

So the reliable workflow is still: cancel fzf, edit the buffer from gr to g, then trigger completion again. Automatic reload would need new fzf-tab logic that re-enters zsh completion with the shortened prefix, not just an fzf option.