diff --git a/packages/opencode/src/session/processor.ts b/packages/opencode/src/session/processor.ts
index 21d50abe9d..8b4faf0265 100644
--- a/packages/opencode/src/session/processor.ts
+++ b/packages/opencode/src/session/processor.ts
@@ -336,9 +336,10 @@ export namespace SessionProcessor {
                   continue
               }
             }
-          } catch (e) {
+          } catch (e: any) {
             log.error("process", {
               error: e,
+              stack: JSON.stringify(e.stack),
             })
             const error = MessageV2.fromError(e, { providerID: input.sessionID })
             const retry = SessionRetry.retryable(error)
diff --git a/packages/opencode/src/session/prompt.ts b/packages/opencode/src/session/prompt.ts
index 17981e4993..d82cbd718c 100644
--- a/packages/opencode/src/session/prompt.ts
+++ b/packages/opencode/src/session/prompt.ts
@@ -590,8 +590,8 @@ export namespace SessionPrompt {
             {
               async transformParams(args) {
                 if (args.type === "stream") {
-                  // @ts-expect-error
-                  args.params.prompt = ProviderTransform.message(args.params.prompt, model.providerID, model.info)
+                  // @ts-expect-error - prompt types are compatible at runtime
+                  args.params.prompt = ProviderTransform.message(args.params.prompt, model)
                 }
                 // Transform tool schemas for provider compatibility
                 if (args.params.tools && Array.isArray(args.params.tools)) {