feat: integrate support for multi step auth flows for providers that require additional questions (#18035)

packages/opencode/src/cli/cmd/providers.ts

@@ -46,9 +46,13 @@ async function handlePluginAuth(plugin: { auth: PluginAuth }, provider: string,
   const inputs: Record<string, string> = {}
   if (method.prompts) {
     for (const prompt of method.prompts) {
-      if (prompt.condition && !prompt.condition(inputs)) {
-        continue
+      if (prompt.when) {
+        const value = inputs[prompt.when.key]
+        if (value === undefined) continue
+        const matches = prompt.when.op === "eq" ? value === prompt.when.value : value !== prompt.when.value
+        if (!matches) continue
       }
+      if (prompt.condition && !prompt.condition(inputs)) continue
       if (prompt.type === "select") {
         const value = await prompts.select({
           message: prompt.message,