diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index e394f9ef..3232a5f1 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -99,7 +99,7 @@ export namespace ProviderTransform {
       if (providerID === "opencode") {
         result["promptCacheKey"] = sessionID
         result["include"] = ["reasoning.encrypted_content"]
-        result["reasoningSummary"] = "auto"
+        result["reasoningSummary"] = "detailed"
       }
     }
     return result