refactor(provider): bring opencode, muse, pi, core and testing in line with Effect conventions (#17542)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
31b04e2ee9Julius Marminge committed on 10/9/2026, 4:42:40 PM· committed by GitHubparent784b562
64 files changedLine totals unavailable