From 91ce7a3f553e5cb021ba5c2ec8b411f8813e846c Mon Sep 17 00:00:00 2001
From: 014-code <2402143478@qq.com>
Date: Fri, 2 Oct 2026 12:22:54 +0000
Subject: [PATCH] fix(rest): format history length query parameter

This fixes #1197
---
 .../a2aproject/sdk/client/transport/rest/RestTransport.java    | 2 +-
 .../sdk/client/transport/rest/RestTransportTest.java           | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/client/transport/rest/src/main/java/org/a2aproject/sdk/client/transport/rest/RestTransport.java b/client/transport/rest/src/main/java/org/a2aproject/sdk/client/transport/rest/RestTransport.java
index a581f2260..b6bf941f4 100644
--- a/client/transport/rest/src/main/java/org/a2aproject/sdk/client/transport/rest/RestTransport.java
+++ b/client/transport/rest/src/main/java/org/a2aproject/sdk/client/transport/rest/RestTransport.java
@@ -141,7 +141,7 @@ public Task getTask(TaskQueryParams taskQueryParams, @Nullable ClientCallContext
         try {
             StringBuilder url = new StringBuilder(Utils.buildBaseUrl(agentInterface, taskQueryParams.tenant()));
             if (taskQueryParams.historyLength() != null && taskQueryParams.historyLength() > 0) {
-                url.append(String.format("/tasks/%1s?historyLength=%2d", taskQueryParams.id(), taskQueryParams.historyLength()));
+                url.append(String.format("/tasks/%s?historyLength=%d", taskQueryParams.id(), taskQueryParams.historyLength()));
             } else {
                 url.append(String.format("/tasks/%1s", taskQueryParams.id()));
             }
diff --git a/client/transport/rest/src/test/java/org/a2aproject/sdk/client/transport/rest/RestTransportTest.java b/client/transport/rest/src/test/java/org/a2aproject/sdk/client/transport/rest/RestTransportTest.java
index f106e4b98..02f3f55fa 100644
--- a/client/transport/rest/src/test/java/org/a2aproject/sdk/client/transport/rest/RestTransportTest.java
+++ b/client/transport/rest/src/test/java/org/a2aproject/sdk/client/transport/rest/RestTransportTest.java
@@ -189,6 +189,7 @@ public void testGetTask() throws Exception {
                 request()
                         .withMethod("GET")
                         .withPath("/tasks/de38c76d-d54c-436c-8b9f-4c2703648d64")
+                        .withQueryStringParameter("historyLength", "5")
         )
                 .respond(
                         response()
@@ -196,7 +197,7 @@ public void testGetTask() throws Exception {
                                 .withBody(GET_TASK_TEST_RESPONSE)
                 );
         ClientCallContext context = null;
-        TaskQueryParams request = new TaskQueryParams("de38c76d-d54c-436c-8b9f-4c2703648d64", 10);
+        TaskQueryParams request = new TaskQueryParams("de38c76d-d54c-436c-8b9f-4c2703648d64", 5);
         RestTransport instance = new RestTransport(CARD);
         Task task = instance.getTask(request, context);
         assertEquals("de38c76d-d54c-436c-8b9f-4c2703648d64", task.id());