Configure built-in retries across execution paths

types.go

@@ -138,6 +138,11 @@ type RunRequest struct {
 	// source or model work. Malformed values return an error matching
 	// ErrInvalidRequest.
 	AppendedMessages []RenderedMessage
+	// TransientRetries overrides the engine's built-in HTTP retry budget for
+	// this execution. Nil inherits the engine value; zero disables retries.
+	// Negative values are invalid for Prepare, PrepareExecution, and Run.
+	// Injected LLMClient implementations remain single-dispatch.
+	TransientRetries *int
 }
 
 // PreparedRun contains prepared prompt execution state returned by