Add max iterations

internal/service/service.go

@@ -446,6 +446,8 @@ type Request struct {
 	Model string `json:"model,omitempty"`
 	// SystemMessage overrides the configured system message for this request.
 	SystemMessage string `json:"system_message,omitempty"`
+	// MaxIterations caps the number of agent loop turns (0 = unlimited).
+	MaxIterations int `json:"max_iterations,omitempty"`
 }
 
 // Response is the response format for chat and voice endpoints.
@@ -541,7 +543,7 @@ func (svc *Service) chat(w http.ResponseWriter, r *http.Request) {
 	}
 
 	res, err := llmc.Completions(
-		ctx, model, req.SystemMessage, 0, req.Messages,
+		ctx, model, req.SystemMessage, req.MaxIterations, req.Messages,
 	)
 	if err != nil {
 		log.ErrorContext(
@@ -713,7 +715,7 @@ func (svc *Service) chatStream(w http.ResponseWriter, r *http.Request) {
 	)
 	go func() {
 		errs <- llmc.CompletionsStream(
-			ctx, model, req.SystemMessage, 0, req.Messages, events,
+			ctx, model, req.SystemMessage, req.MaxIterations, req.Messages, events,
 		)
 		close(errs)
 	}()