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2.6.3 Completion UI s

SLY works with most Emacs "completion UIs" out of the box, providing completion in source files and inputting Common Lisp symbol names from the minibuffer.

• Company,
• Emacs 27’s Fido-mode, and
• Helm are well-supported, as is
• "vanilla" completion.
• For consistency, SLY defaults to its own UI, sly-symbol-completion-mode, useful if you don’t have or like any of those. You can turn it off.
• Also, if you use Helm and wish to have even more Helm-based fanciness, you can use helm-sly.