diff --git a/backend-java/src/test/java/com/nanri/aiimage/config/PythonContractFixtureTest.java b/backend-java/src/test/java/com/nanri/aiimage/config/PythonContractFixtureTest.java
new file mode 100644
index 00000000..53d724cc
--- /dev/null
+++ b/backend-java/src/test/java/com/nanri/aiimage/config/PythonContractFixtureTest.java
@@ -0,0 +1,115 @@
+package com.nanri.aiimage.config;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * task-202：Python-contract 夹具准备契约。
+ * 校验 python-contract/*.json 存在、为合法 JSON、顶层字段与真实 DTO 对齐、已脱敏（无真实凭据）、
+ * 可复现；字段来源与脱敏口径见同目录 README.md。
+ */
+class PythonContractFixtureTest {
+
+    private static final Path DIR = Path.of(System.getProperty("user.dir"),
+            "src/test/resources/python-contract");
+    private static final ObjectMapper MAPPER = new ObjectMapper();
+
+    private JsonNode json(String name) throws IOException {
+        return MAPPER.readTree(Files.readAllBytes(DIR.resolve(name)));
+    }
+
+    private static Set<String> keys(JsonNode node) {
+        List<String> names = new ArrayList<>();
+        node.fieldNames().forEachRemaining(names::add);
+        return Set.copyOf(names);
+    }
+
+    @Test
+    void fixtureResultRequestExists() throws IOException {
+        JsonNode n = json("result.request.json");
+        assertEquals("sim-20260905-0001", n.path("submissionId").asText());
+    }
+
+    @Test
+    void fixtureItemsExists() throws IOException {
+        JsonNode n = json("items.response.json");
+        assertTrue(n.path("items").isArray() && n.path("items").size() >= 1);
+    }
+
+    @Test
+    void fixtureParsedPayloadExists() throws IOException {
+        JsonNode n = json("parsed_payload.response.json");
+        assertTrue(n.has("allItems") && n.has("groups") && n.has("items"));
+    }
+
+    @Test
+    void fixtureHeartbeatExists() throws IOException {
+        JsonNode req = json("heartbeat.request.json");
+        JsonNode resp = json("heartbeat.response.json");
+        assertTrue(req.has("moduleType") && req.has("phase"));
+        assertTrue(resp.has("alive") && resp.has("status"));
+    }
+
+    @Test
+    void fixtureSanitizedNoRealCredentials() throws IOException {
+        String all = String.join("\n", List.of(
+                Files.readString(DIR.resolve("parsed_payload.response.json")),
+                Files.readString(DIR.resolve("result.request.json"))));
+        assertFalse(all.contains("WTFrb"), "不得出现真实 DB/内部凭据");
+        assertFalse(all.toLowerCase().contains("bearer "), "不得出现真实 token");
+        JsonNode parsed = json("parsed_payload.response.json");
+        assertEquals("<redacted>", parsed.path("apiKey").asText(), "apiKey 必须占位");
+        assertFalse(parsed.path("aiPrompt").asText().toLowerCase().contains("真实"),
+                "aiPrompt 不得含真实内容");
+    }
+
+    @Test
+    void fixtureShapeValidJson() throws IOException {
+        for (String name : List.of("heartbeat.request.json", "heartbeat.response.json",
+                "items.response.json", "result.request.json", "parsed_payload.response.json")) {
+            JsonNode n = json(name);
+            assertTrue(n.isContainerNode(), name + " 应为 JSON 对象/数组");
+        }
+    }
+
+    @Test
+    void fixtureFieldsDocumentedByReadme() throws IOException {
+        String readme = Files.readString(DIR.resolve("README.md"));
+        assertTrue(readme.contains("TaskHeartbeatRequest") && readme.contains("CollectDataItemsPageVo")
+                && readme.contains("SimilarAsinSubmitResultRequest")
+                && readme.contains("SimilarAsinParsedPayloadDto"), "README 应说明字段来源");
+        assertTrue(readme.contains("脱敏"), "README 应说明脱敏");
+    }
+
+    @Test
+    void fixtureHeartbeatTopKeysMatchDto() throws IOException {
+        assertEquals(Set.of("moduleType", "phase", "current", "total", "collectStage",
+                        "currentKeyword", "searchCurrentPage", "searchTotalPages",
+                        "detailProcessedAsins", "detailTotalAsins"),
+                keys(json("heartbeat.request.json")), "心跳请求顶层字段应与 TaskHeartbeatRequest 对齐");
+        assertEquals(Set.of("alive", "status", "moduleType", "message"),
+                keys(json("heartbeat.response.json")), "心跳响应应与 TaskHeartbeatVo 对齐");
+    }
+
+    @Test
+    void fixtureReproducibleStable() throws IOException {
+        for (String name : List.of("heartbeat.request.json", "items.response.json",
+                "result.request.json", "parsed_payload.response.json")) {
+            String a = Files.readString(DIR.resolve(name));
+            String b = Files.readString(DIR.resolve(name));
+            assertEquals(a, b, name + " 应可复现");
+        }
+    }
+}
diff --git a/backend-java/src/test/resources/python-contract/README.md b/backend-java/src/test/resources/python-contract/README.md
new file mode 100644
index 00000000..0dfdd52d
--- /dev/null
+++ b/backend-java/src/test/resources/python-contract/README.md
@@ -0,0 +1,19 @@
+# Python-contract 夹具（task-202）
+
+> 目录：`src/test/resources/python-contract/`。用途：模块 13 的 /result、/items、parsed-payload、heartbeat 契约测试固定输入。
+
+## 内容与字段来源
+
+| 文件 | 对应 Worker 接口 | 字段来源（服务 DTO，非臆造） |
+|---|---|---|
+| heartbeat.request.json | POST /api/tasks/{taskId}/heartbeat | `TaskHeartbeatRequest`（moduleType/phase/current/total/collectStage/currentKeyword/search*Page*/detail*Asins） |
+| heartbeat.response.json | 同上响应 | `TaskHeartbeatVo`（alive/status/moduleType/message） |
+| items.response.json | GET /tasks/{taskId}/items（collectdata） | `CollectDataItemsPageVo`+`CollectDataItemVo`（分页字段 + items 行结构） |
+| result.request.json | 模块 submit-result（similarasin 示例） | `SimilarAsinSubmitResultRequest`（submissionId/chunkIndex/chunkTotal/done/error/groups） |
+| parsed_payload.response.json | GET /tasks/{taskId}/parsed-payload（similarasin） | `SimilarAsinParsedPayloadDto`（aiPrompt/apiKey/imgSwitch/…/items/allItems/groups） |
+
+## 说明
+
+- **脱敏**：所有值均为伪造（taskId/ASIN/文件名/关键词等）；敏感字段已置占位——`parsed_payload.response.json` 的 `apiKey="<redacted>"`、`aiPrompt="<redacted-prompt>"`，不含任何真实凭据。
+- **来源口径**：schema-fixture（字段取自本服务 DTO）；非录自 app_client/amazon 真实抓包。若后续在具备桌面端/爬虫运行环境时录制真实报文，可另存 `*.recorded.json` 增补，不替换本 schema-fixture。
+- **可复现**：纯静态 JSON，可重复用于契约测试。
diff --git a/backend-java/src/test/resources/python-contract/heartbeat.request.json b/backend-java/src/test/resources/python-contract/heartbeat.request.json
new file mode 100644
index 00000000..0ca768a4
--- /dev/null
+++ b/backend-java/src/test/resources/python-contract/heartbeat.request.json
@@ -0,0 +1,12 @@
+{
+  "moduleType": "similarasin",
+  "phase": "search",
+  "current": 3,
+  "total": 10,
+  "collectStage": "keyword-search",
+  "currentKeyword": "ring",
+  "searchCurrentPage": 1,
+  "searchTotalPages": 4,
+  "detailProcessedAsins": 12,
+  "detailTotalAsins": 120
+}
diff --git a/backend-java/src/test/resources/python-contract/heartbeat.response.json b/backend-java/src/test/resources/python-contract/heartbeat.response.json
new file mode 100644
index 00000000..6a51b9ab
--- /dev/null
+++ b/backend-java/src/test/resources/python-contract/heartbeat.response.json
@@ -0,0 +1,6 @@
+{
+  "alive": true,
+  "status": "RUNNING",
+  "moduleType": "similarasin",
+  "message": "ok"
+}
diff --git a/backend-java/src/test/resources/python-contract/items.response.json b/backend-java/src/test/resources/python-contract/items.response.json
new file mode 100644
index 00000000..c50af1e5
--- /dev/null
+++ b/backend-java/src/test/resources/python-contract/items.response.json
@@ -0,0 +1,25 @@
+{
+  "taskId": 7004,
+  "taskNo": "SA-20260905-7004",
+  "taskType": "collect-data",
+  "taskStatus": "RUNNING",
+  "page": 1,
+  "pageSize": 50,
+  "count": 1,
+  "total": 1,
+  "totalPages": 1,
+  "filters": {
+    "country": "US"
+  },
+  "items": [
+    {
+      "id": 1,
+      "rowIndex": 1,
+      "sourceFileKey": "in/example.xlsx",
+      "sourceFilename": "example.xlsx",
+      "keyword": "ring",
+      "statusValue": "PENDING",
+      "extra": {}
+    }
+  ]
+}
diff --git a/backend-java/src/test/resources/python-contract/parsed_payload.response.json b/backend-java/src/test/resources/python-contract/parsed_payload.response.json
new file mode 100644
index 00000000..e0e6c5ef
--- /dev/null
+++ b/backend-java/src/test/resources/python-contract/parsed_payload.response.json
@@ -0,0 +1,29 @@
+{
+  "aiPrompt": "<redacted-prompt>",
+  "apiKey": "<redacted>",
+  "imgSwitch": false,
+  "categorySwitch": false,
+  "sourceFiles": [],
+  "headers": [
+    "asin",
+    "keyword",
+    "title"
+  ],
+  "items": [
+    {
+      "rowIndex": 1,
+      "asin": "B0FAKETEST123",
+      "keyword": "ring",
+      "title": "example"
+    }
+  ],
+  "allItems": [
+    {
+      "rowIndex": 1,
+      "asin": "B0FAKETEST123",
+      "keyword": "ring",
+      "title": "example"
+    }
+  ],
+  "groups": []
+}
diff --git a/backend-java/src/test/resources/python-contract/result.request.json b/backend-java/src/test/resources/python-contract/result.request.json
new file mode 100644
index 00000000..63e3b37b
--- /dev/null
+++ b/backend-java/src/test/resources/python-contract/result.request.json
@@ -0,0 +1,20 @@
+{
+  "submissionId": "sim-20260905-0001",
+  "chunkIndex": 0,
+  "chunkTotal": 1,
+  "done": true,
+  "error": null,
+  "groups": [
+    {
+      "name": "group-1",
+      "items": [
+        {
+          "rowIndex": 1,
+          "keyword": "ring",
+          "asin": "B0FAKETEST123",
+          "status": "SUCCESS"
+        }
+      ]
+    }
+  ]
+}