core: make account login upgrades safe while adding multi-account workspace auth (#15487)

Co-authored-by: Kit Langton <kit.langton@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/opencode/src/cli/effect/prompt.ts

@@ -0,0 +1,25 @@
+import * as prompts from "@clack/prompts"
+import { Effect, Option } from "effect"
+
+export const intro = (msg: string) => Effect.sync(() => prompts.intro(msg))
+export const outro = (msg: string) => Effect.sync(() => prompts.outro(msg))
+
+export const log = {
+  info: (msg: string) => Effect.sync(() => prompts.log.info(msg)),
+}
+
+export const select = <Value>(opts: Parameters<typeof prompts.select<Value>>[0]) =>
+  Effect.tryPromise(() => prompts.select(opts)).pipe(
+    Effect.map((result) => {
+      if (prompts.isCancel(result)) return Option.none<Value>()
+      return Option.some(result)
+    }),
+  )
+
+export const spinner = () => {
+  const s = prompts.spinner()
+  return {
+    start: (msg: string) => Effect.sync(() => s.start(msg)),
+    stop: (msg: string, code?: number) => Effect.sync(() => s.stop(msg, code)),
+  }
+}