diff --git a/registry.json b/registry.json
index ea952a7..56c0474 100644
--- a/registry.json
+++ b/registry.json
@@ -1,4 +1,14 @@
 {
   "schema_version": 1,
-  "plugins": []
+  "plugins": [
+    {
+      "id": "request-trace",
+      "name": "上游请求追踪",
+      "version": "1.0.0",
+      "description": "为上游请求加入不含敏感信息的部署追踪标记，便于确认插件链和网关路由。",
+      "manifest_url": "https://git.9nn.cn/xiaodong/99code-plugins/raw/branch/main/request-trace/manifest.json",
+      "platforms": ["openai", "codex", "anthropic", "gemini", "antigravity", "grok", "xai", "kimi"],
+      "sha256": "20639523163a8253b8589dbf65ded5c1efe22c5534093e5ce729c9d181b08630"
+    }
+  ]
 }
diff --git a/request-trace/README.md b/request-trace/README.md
new file mode 100644
index 0000000..94aad41
--- /dev/null
+++ b/request-trace/README.md
@@ -0,0 +1,10 @@
+# 请求追踪插件
+
+这是 99code 插件商店的首个可安装生产插件。启用后，它会在上游请求中加入不含敏感信息的 `X-99Code-Plugin: request-trace/1.0.0` 标记，便于在反向代理、网关和上游抓包中确认插件链确实生效。
+
+可在插件中心配置：
+
+- `header_name`：必须以 `X-` 开头，最长 64 字符。
+- `header_value`：最长 128 字符，禁止换行。
+
+该插件不会读取、记录或上传账号凭据。
diff --git a/request-trace/manifest.json b/request-trace/manifest.json
new file mode 100644
index 0000000..a78f8da
--- /dev/null
+++ b/request-trace/manifest.json
@@ -0,0 +1,30 @@
+{
+  "schema_version": 1,
+  "id": "request-trace",
+  "name": "上游请求追踪",
+  "version": "1.0.0",
+  "description": "为上游请求加入不含敏感信息的部署追踪标记，便于确认插件链和网关路由。",
+  "entrypoint": "com.ninecode.plugins.RequestTracePlugin",
+  "platforms": [
+    "openai",
+    "codex",
+    "anthropic",
+    "gemini",
+    "antigravity",
+    "grok",
+    "xai",
+    "kimi"
+  ],
+  "artifact": {
+    "url": "https://git.9nn.cn/xiaodong/99code-plugins/raw/branch/main/request-trace/request-trace-1.0.0.jar",
+    "sha256": "20639523163a8253b8589dbf65ded5c1efe22c5534093e5ce729c9d181b08630",
+    "signature": "",
+    "key_id": "",
+    "size": 2457
+  },
+  "credential_sync": null,
+  "metadata": {
+    "category": "observability",
+    "homepage": "https://git.9nn.cn/xiaodong/99code-plugins"
+  }
+}
diff --git a/request-trace/request-trace-1.0.0.jar b/request-trace/request-trace-1.0.0.jar
new file mode 100644
index 0000000..8338d27
Binary files /dev/null and b/request-trace/request-trace-1.0.0.jar differ
diff --git a/request-trace/src/main/java/com/ninecode/plugins/RequestTracePlugin.java b/request-trace/src/main/java/com/ninecode/plugins/RequestTracePlugin.java
new file mode 100644
index 0000000..828b55c
--- /dev/null
+++ b/request-trace/src/main/java/com/ninecode/plugins/RequestTracePlugin.java
@@ -0,0 +1,63 @@
+package com.ninecode.plugins;
+
+import com.ninecode.app.plugin.PluginRelayExchange;
+import com.ninecode.app.plugin.ProviderPlugin;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Set;
+
+/** Adds a non-sensitive deployment marker to outbound provider requests. */
+public final class RequestTracePlugin implements ProviderPlugin {
+    private static final Set<String> SUPPORTED_PLATFORMS = Set.of(
+            "openai", "codex", "anthropic", "gemini", "antigravity", "grok", "xai", "kimi"
+    );
+    private String headerName = "X-99Code-Plugin";
+    private String headerValue = "request-trace/1.0.0";
+
+    @Override
+    public String id() {
+        return "request-trace";
+    }
+
+    @Override
+    public Set<String> platforms() {
+        return SUPPORTED_PLATFORMS;
+    }
+
+    @Override
+    public void start(Map<String, Object> configuration) {
+        String configuredName = text(configuration, "header_name");
+        String configuredValue = text(configuration, "header_value");
+        if (!configuredName.isBlank()) {
+            if (!configuredName.toLowerCase(Locale.ROOT).startsWith("x-") || configuredName.length() > 64) {
+                throw new IllegalArgumentException("header_name 必须是长度不超过 64 的 X- 自定义请求头");
+            }
+            headerName = configuredName;
+        }
+        if (!configuredValue.isBlank()) {
+            if (configuredValue.length() > 128 || configuredValue.contains("\r") || configuredValue.contains("\n")) {
+                throw new IllegalArgumentException("header_value 不能为空、换行或超过 128 个字符");
+            }
+            headerValue = configuredValue;
+        }
+    }
+
+    @Override
+    public PluginRelayExchange beforeRequest(PluginRelayExchange exchange) {
+        Map<String, List<String>> headers = new LinkedHashMap<>(exchange.headers());
+        headers.putIfAbsent(headerName, List.of(headerValue));
+        return new PluginRelayExchange(
+                exchange.pluginId(), exchange.platform(), exchange.accountId(), exchange.model(), exchange.method(),
+                exchange.uri(), headers, exchange.body(), exchange.statusCode()
+        );
+    }
+
+    private String text(Map<String, Object> configuration, String key) {
+        if (configuration == null || configuration.get(key) == null) {
+            return "";
+        }
+        return String.valueOf(configuration.get(key)).trim();
+    }
+}