Spelling, dictionary, translation, and Apple Intelligence Writing Tools are the Mac's own language stack. Accepted edits land on the Moment path as writer changes.
threshold
The point that must be exceeded for a bid to require an open process. Installed system dictionary. Nothing is sent to a Roono server.
limit · cutoff · minimum
Spelling, Grammar & Dictionary
Live spelling, grammar, automatic correction, word completion, smart quotes, and system text replacements work in the ordinary editor, continuous flow, and Focus Mode.
Language opens installed Dictionary and Thesaurus sources, spelling alternatives, completions, learned words, and Apple Translation for the selection or the word at the caret. Roono bundles no dictionary and sends no prose to a Roono server.
Apple Intelligence Writing Tools
When Writing Tools are available on the Mac, manuscript editors use the system Writing Tools experience. Language also exposes Writing Tools. Vault fields and non-manuscript fields opt out.
Writing Tools replace text only after you accept the system result. That acceptance is a writer edit, not an agent proposal.
Edits on the Moment Path
Dictionary replacements, translations, and accepted Writing Tools results save like any other keystroke: they become Moments and can be branched or recovered. They never arrive on an agent/ branch.