Crate os_spellcheck 

Native OS spell-check: NSSpellChecker on macOS, ISpellChecker on Windows.

Two operations, deliberately split:

• SpellChecker::check finds the misspelled spans in a string (each a UTF-8 byte range into it). This is cheap and local, so a host can run it on every edit.
• SpellChecker::suggestions returns replacement suggestions for a single word. On macOS this is a synchronous XPC call to the system spell service, so it’s kept separate and meant to run lazily — e.g. only when the user right-clicks a flagged word — never in a per-keystroke loop.

On a platform with no system speller (currently Linux) both are no-ops, so callers don’t need their own cfgs. Host-agnostic: plain &str and byte ranges in, no gpui dependency.

Structs

SpellChecker

A handle to the host OS spell-checking service.