typecheck vs type-check vs type check

Was having this debate during a submission today. Do y'all have opinions?

My reasoning was to apply the same rationale as runtime vs run-time vs run time: `type check` when `type` is modifying the verb `check`, `type-check` when acting as a phrase modifying something else such as `type-checking algorithm`, and never `typecheck`.

Start by reviewing the issue's proposed usage of “type check,” “type-check,” and “typecheck” alongside the existing style guide rules. Done means reaching a maintainer decision and recording the chosen convention in the appropriate style guidance, but no file or entry point is identified here.

Written by the indexing model from the issue text.