diff --git a/src/main/java/com/yunhai/platform/gateway/filter/SignVerifyFilter.java b/src/main/java/com/yunhai/platform/gateway/filter/SignVerifyFilter.java
new file mode 100644
index 0000000..d6c8360
--- /dev/null
+++ b/src/main/java/com/yunhai/platform/gateway/filter/SignVerifyFilter.java
@@ -0,0 +1,159 @@
+package com.yunhai.platform.gateway.filter;
+
+import com.yunhai.platform.gateway.auth.GatewayKeyService;
+import com.yunhai.platform.gateway.envelope.EnvelopeWriter;
+import com.yunhai.platform.gateway.route.GatewayProperties;
+import com.yunhai.platform.utils.crypto.SignUtil;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * v1 验签过滤器（T1.2，共享向量）：canonical 与 starter
+ * {@code AppAuthFilter.buildSignedTarget + SignCanonical} 逐字节一致——
+ * {@code METHOD\n剥掉 target 首段后的 path[?解码排序query]\ntimestamp}，HmacSHA256-Base64（F1），
+ * 与客户端"剥 basePath 后签名"严格对齐；比对复用 starter 侧同一 {@link SignUtil}（不重写算法），
+ * 时间窗 ±5min（F2，不得更宽）。
+ * <p>
+ * 头缺失 / appKey 未知或禁用（{@link GatewayKeyService} null = fail-closed）/ 验签失败 /
+ * 时间窗超出 → 判定 FAIL：observe=true 只记台账（verdict=FAIL_OBSERVED）放行（R4），
+ * observe=false 裸 <b>401</b>（F5 契约）。判定结果经 request attribute 传递
+ * （{@link #ATTR_VERDICT} / {@link #ATTR_AUTH_APPKEY}），供 T1.4 身份注入与 T1.5 台账消费。
+ * <p>
+ * 链序第 3 环（T1.6 定型）：Sanitize(1) → 路由判定(2) → 本过滤器(3) → 身份注入(4) → 转发(5)。
+ */
+@Component
+@Order(3)
+public class SignVerifyFilter implements Filter {
+
+    /** 判定结果 attribute（T1.5/T1.6 台账 verdict） */
+    public static final String ATTR_VERDICT = "yh.gateway.verdict";
+    /** 验签通过的 appKey（T1.4 身份注入唯一合法来源） */
+    public static final String ATTR_AUTH_APPKEY = "yh.gateway.auth.appKey";
+
+    public static final String VERDICT_PASS = "PASS";
+    public static final String VERDICT_FAIL = "FAIL";
+    public static final String VERDICT_FAIL_OBSERVED = "FAIL_OBSERVED";
+    public static final String VERDICT_ANON = "ANON";
+
+    @Autowired
+    private GatewayKeyService keyService;
+
+    @Autowired
+    private GatewayProperties properties;
+
+    /** 测试/显式装配入口（同 TargetRouter.setProperties 惯例） */
+    void setKeyService(GatewayKeyService keyService) {
+        this.keyService = keyService;
+    }
+
+    void setProperties(GatewayProperties properties) {
+        this.properties = properties;
+    }
+
+    @Override
+    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
+            throws IOException, ServletException {
+        if (!(request instanceof HttpServletRequest) || !(response instanceof HttpServletResponse)) {
+            chain.doFilter(request, response);
+            return;
+        }
+        HttpServletRequest req = (HttpServletRequest) request;
+        HttpServletResponse res = (HttpServletResponse) response;
+
+        boolean pass = false;
+        String appKey = req.getHeader("X-App-Key");
+        String timestamp = req.getHeader("X-Timestamp");
+        String signature = req.getHeader("X-Signature");
+        String strippedPath = (String) req.getAttribute(SanitizeFilter.ATTR_STRIPPED_PATH);
+        if (!isBlank(appKey) && !isBlank(timestamp) && !isBlank(signature) && strippedPath != null) {
+            String secret = keyService.getSecret(appKey); // null = 未知/禁用/异常，fail-closed
+            if (secret != null) {
+                String target = buildCanonicalTarget(strippedPath, req.getQueryString());
+                try {
+                    // 复用 starter 同一验签实现：签名比对 + 时间窗（默认 ±5min，F2）
+                    pass = SignUtil.verifyRequestWithExpire(req.getMethod(), target, timestamp, secret, signature);
+                } catch (RuntimeException e) {
+                    pass = false; // 意外异常同样落 FAIL（判定组件绝不 500）
+                }
+            }
+        }
+
+        if (pass) {
+            req.setAttribute(ATTR_VERDICT, VERDICT_PASS);
+            req.setAttribute(ATTR_AUTH_APPKEY, appKey);
+            chain.doFilter(request, response);
+            return;
+        }
+        if (properties.isObserve()) {
+            // R4：P1 只观察——记台账不拦（台账写入由 T1.5/T1.6 消费本 attribute）
+            req.setAttribute(ATTR_VERDICT, VERDICT_FAIL_OBSERVED);
+            chain.doFilter(request, response);
+        } else {
+            req.setAttribute(ATTR_VERDICT, VERDICT_FAIL);
+            EnvelopeWriter.writeBare(res, 401);
+        }
+    }
+
+    /**
+     * canonical 的 target 部分 = path + （有 query 时 {@code ?解码排序query}）——
+     * 与 starter {@code SignCanonical.buildTarget(sortRawQuery(...))} 同语义（共享向量钉死）。
+     */
+    static String buildCanonicalTarget(String pathAfterStrip, String rawQuery) {
+        String sorted = sortRawQuery(rawQuery);
+        return sorted.isEmpty() ? pathAfterStrip : pathAfterStrip + "?" + sorted;
+    }
+
+    /** 复刻 starter SignCanonical.sortRawQuery：逐对解码、{@code k=v} 字典序排序、& 连接 */
+    static String sortRawQuery(String rawQuery) {
+        if (rawQuery == null || rawQuery.isEmpty()) {
+            return "";
+        }
+        List<String> pairs = new ArrayList<>();
+        for (String part : rawQuery.split("&")) {
+            if (part.isEmpty()) {
+                continue;
+            }
+            int idx = part.indexOf('=');
+            String k = idx < 0 ? part : part.substring(0, idx);
+            String v = idx < 0 ? "" : part.substring(idx + 1);
+            pairs.add(urlDecode(k) + "=" + urlDecode(v));
+        }
+        Collections.sort(pairs);
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < pairs.size(); i++) {
+            if (i > 0) {
+                sb.append('&');
+            }
+            sb.append(pairs.get(i));
+        }
+        return sb.toString();
+    }
+
+    private static String urlDecode(String s) {
+        try {
+            return URLDecoder.decode(s, StandardCharsets.UTF_8.name());
+        } catch (UnsupportedEncodingException e) {
+            return s;
+        }
+    }
+
+    private static boolean isBlank(String s) {
+        return s == null || s.trim().isEmpty();
+    }
+}
diff --git a/src/test/java/com/yunhai/platform/gateway/filter/SignVerifyFilterTest.java b/src/test/java/com/yunhai/platform/gateway/filter/SignVerifyFilterTest.java
new file mode 100644
index 0000000..7ae15c4
--- /dev/null
+++ b/src/test/java/com/yunhai/platform/gateway/filter/SignVerifyFilterTest.java
@@ -0,0 +1,172 @@
+package com.yunhai.platform.gateway.filter;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.yunhai.platform.gateway.auth.GatewayKeyService;
+import com.yunhai.platform.gateway.route.GatewayProperties;
+import com.yunhai.platform.utils.crypto.SignUtil;
+import org.junit.jupiter.api.Test;
+import org.springframework.mock.web.MockFilterChain;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+
+import java.io.InputStream;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * SignVerifyFilter v1 判定用例（T1.2 TDD）：canonical 与 starter 逐字节一致
+ * （剥 target 首段后的 path + 解码排序 query + timestamp，{@code shared-sign-vectors/v1.json} 同源对拍）；
+ * observe=true 只记不拦（verdict=FAIL_OBSERVED 放行），observe=false 坏签名裸 401；
+ * 时间窗 ±5min（F2，不得更宽）。
+ */
+class SignVerifyFilterTest {
+
+    private static final String SECRET = "sec-alpha-0123456789abcdef";
+
+    private SignVerifyFilter filter(boolean observe) {
+        SignVerifyFilter f = new SignVerifyFilter();
+        GatewayKeyService keyService = mock(GatewayKeyService.class);
+        when(keyService.getSecret("app1")).thenReturn(SECRET);
+        GatewayProperties props = new GatewayProperties();
+        props.setObserve(observe);
+        f.setKeyService(keyService);
+        f.setProperties(props);
+        return f;
+    }
+
+    /** 模拟已过 SanitizeFilter 的网关请求：attribute 契约 + 三签名头 */
+    private MockHttpServletRequest request(String method, String strippedPath, String query,
+                                           String appKey, String ts, String sign) {
+        MockHttpServletRequest req = new MockHttpServletRequest(method, "/userbase" + strippedPath);
+        if (query != null) {
+            req.setQueryString(query);
+        }
+        req.setAttribute(SanitizeFilter.ATTR_STRIPPED_PATH, strippedPath);
+        if (appKey != null) {
+            req.addHeader("X-App-Key", appKey);
+        }
+        if (ts != null) {
+            req.addHeader("X-Timestamp", ts);
+        }
+        if (sign != null) {
+            req.addHeader("X-Signature", sign);
+        }
+        return req;
+    }
+
+    private MockHttpServletResponse run(SignVerifyFilter f, MockHttpServletRequest req,
+                                        MockFilterChain chain) throws Exception {
+        MockHttpServletResponse res = new MockHttpServletResponse();
+        f.doFilter(req, res, chain);
+        return res;
+    }
+
+    @Test
+    void 合法签名判定PASS且放行() throws Exception {
+        String ts = String.valueOf(System.currentTimeMillis());
+        String sign = SignUtil.signRequest("GET", "/oapi/message/list", ts, SECRET);
+        MockFilterChain chain = new MockFilterChain();
+        MockHttpServletRequest req = request("GET", "/oapi/message/list", null, "app1", ts, sign);
+        MockHttpServletResponse res = run(filter(true), req, chain);
+        assertThat(res.getStatus()).isEqualTo(200);
+        assertThat(chain.getRequest()).as("链条继续").isNotNull();
+        assertThat(req.getAttribute(SignVerifyFilter.ATTR_VERDICT)).isEqualTo(SignVerifyFilter.VERDICT_PASS);
+        assertThat(req.getAttribute(SignVerifyFilter.ATTR_AUTH_APPKEY)).as("供 T1.4 身份注入").isEqualTo("app1");
+    }
+
+    @Test
+    void 合法签名含排序query判定PASS() throws Exception {
+        String ts = String.valueOf(System.currentTimeMillis());
+        // 客户端按解码排序后 query 签名（starter sortRawQuery 同语义）
+        String sign = SignUtil.signRequest("GET", "/oapi/user/byId?id=7&name=zhang san", ts, SECRET);
+        MockFilterChain chain = new MockFilterChain();
+        MockHttpServletRequest req = request("GET", "/oapi/user/byId", "name=zhang%20san&id=7", "app1", ts, sign);
+        MockHttpServletResponse res = run(filter(false), req, chain);
+        assertThat(res.getStatus()).as("乱序 query 经网关归一后仍 PASS").isEqualTo(200);
+        assertThat(req.getAttribute(SignVerifyFilter.ATTR_VERDICT)).isEqualTo(SignVerifyFilter.VERDICT_PASS);
+    }
+
+    @Test
+    void 坏签名observe下放行且记FAIL() throws Exception {
+        String ts = String.valueOf(System.currentTimeMillis());
+        MockFilterChain chain = new MockFilterChain();
+        MockHttpServletRequest req = request("GET", "/oapi/message/list", null, "app1", ts, "deadbeef");
+        MockHttpServletResponse res = run(filter(true), req, chain);
+        assertThat(res.getStatus()).as("观察模式不拦").isEqualTo(200);
+        assertThat(chain.getRequest()).isNotNull();
+        assertThat(req.getAttribute(SignVerifyFilter.ATTR_VERDICT))
+                .as("台账 verdict=FAIL（观察形态）").isEqualTo(SignVerifyFilter.VERDICT_FAIL_OBSERVED);
+    }
+
+    @Test
+    void 坏签名非observe下裸401() throws Exception {
+        String ts = String.valueOf(System.currentTimeMillis());
+        MockFilterChain chain = new MockFilterChain();
+        MockHttpServletRequest req = request("GET", "/oapi/message/list", null, "app1", ts, "deadbeef");
+        MockHttpServletResponse res = run(filter(false), req, chain);
+        assertThat(res.getStatus()).isEqualTo(401);
+        assertThat(res.getContentAsByteArray()).as("裸码无信封").isEmpty();
+        assertThat(chain.getRequest()).as("链条中断").isNull();
+        assertThat(req.getAttribute(SignVerifyFilter.ATTR_VERDICT)).isEqualTo(SignVerifyFilter.VERDICT_FAIL);
+    }
+
+    @Test
+    void 头缺失判定FAIL() throws Exception {
+        MockFilterChain chain = new MockFilterChain();
+        MockHttpServletRequest req = request("GET", "/oapi/message/list", null, null, null, null);
+        MockHttpServletResponse res = run(filter(false), req, chain);
+        assertThat(res.getStatus()).as("三头缺失 = FAIL 裸 401").isEqualTo(401);
+        assertThat(req.getAttribute(SignVerifyFilter.ATTR_VERDICT)).isEqualTo(SignVerifyFilter.VERDICT_FAIL);
+    }
+
+    @Test
+    void 未知appKey判定FAIL() throws Exception {
+        String ts = String.valueOf(System.currentTimeMillis());
+        String sign = SignUtil.signRequest("GET", "/oapi/message/list", ts, SECRET);
+        MockFilterChain chain = new MockFilterChain();
+        // appKey=ghost：mock 的 getSecret 返回 null（未知/禁用 fail-closed）
+        MockHttpServletRequest req = request("GET", "/oapi/message/list", null, "ghost", ts, sign);
+        MockHttpServletResponse res = run(filter(false), req, chain);
+        assertThat(res.getStatus()).isEqualTo(401);
+    }
+
+    @Test
+    void 时间窗超出判定FAIL() throws Exception {
+        // ±5min（F2）：6min 前签名 + 正确算法也必须 FAIL
+        String ts = String.valueOf(System.currentTimeMillis() - 6 * 60 * 1000L);
+        String sign = SignUtil.signRequest("GET", "/oapi/message/list", ts, SECRET);
+        MockFilterChain chain = new MockFilterChain();
+        MockHttpServletRequest req = request("GET", "/oapi/message/list", null, "app1", ts, sign);
+        MockHttpServletResponse res = run(filter(false), req, chain);
+        assertThat(res.getStatus()).as("时间窗超出 = FAIL 裸 401").isEqualTo(401);
+        assertThat(req.getAttribute(SignVerifyFilter.ATTR_VERDICT)).isEqualTo(SignVerifyFilter.VERDICT_FAIL);
+    }
+
+    @Test
+    void 共享向量与starter逐字节一致() throws Exception {
+        ObjectMapper mapper = new ObjectMapper();
+        JsonNode root;
+        try (InputStream in = getClass().getResourceAsStream("/shared-sign-vectors/v1.json")) {
+            assertThat(in).as("共享向量资源存在").isNotNull();
+            root = mapper.readTree(in);
+        }
+        for (JsonNode v : root.get("vectors")) {
+            String secret = v.get("secret").asText();
+            String method = v.get("method").asText();
+            String path = v.get("pathAfterStrip").asText();
+            String rawQuery = v.get("rawQuery").isNull() ? null : v.get("rawQuery").asText();
+            String ts = v.get("timestamp").asText();
+            String expectedTarget = v.get("canonicalTarget").asText();
+            String expectedSign = v.get("expectedSignature").asText();
+
+            String target = SignVerifyFilter.buildCanonicalTarget(path, rawQuery);
+            assertThat(target).as("canonical target 构造同源（%s %s）", method, rawQuery).isEqualTo(expectedTarget);
+            assertThat(SignUtil.signRequest(method, target, ts, secret))
+                    .as("期望签名逐字节一致（%s %s）", method, path)
+                    .isEqualTo(expectedSign);
+        }
+    }
+}
diff --git a/src/test/resources/shared-sign-vectors/v1.json b/src/test/resources/shared-sign-vectors/v1.json
new file mode 100644
index 0000000..eef79bd
--- /dev/null
+++ b/src/test/resources/shared-sign-vectors/v1.json
@@ -0,0 +1,52 @@
+{
+  "protocol": "v1",
+  "canonical": "METHOD\\npath[?decoded-sorted-query]\\ntimestamp -> HmacSHA256 -> Base64",
+  "source": "由 yh-app-auth-spring-boot-starter 真实代码（SignCanonical.sortRawQuery/buildTarget，反射调用）+ yh-utils-core SignUtil.signRequest 于 2026-09-21 执行生成（starter jar 1.0.0-SNAPSHOT，与 AppAuthFilter.buildSignedTarget 同一链路）；三方对拍基线（§9 A4）",
+  "vectors": [
+    {
+      "secret": "sec-alpha-0123456789abcdef",
+      "method": "GET",
+      "pathAfterStrip": "/oapi/message/list",
+      "rawQuery": null,
+      "timestamp": "1758441600000",
+      "canonicalTarget": "/oapi/message/list",
+      "expectedSignature": "Regw08O602Tp61nhH6oG/5VIvyfmU9ZbWs42P7OHzj4="
+    },
+    {
+      "secret": "sec-alpha-0123456789abcdef",
+      "method": "GET",
+      "pathAfterStrip": "/oapi/user/byId",
+      "rawQuery": "id=7&name=zhang%20san",
+      "timestamp": "1758441600001",
+      "canonicalTarget": "/oapi/user/byId?id=7&name=zhang san",
+      "expectedSignature": "PfmaaIf+D+S4qcbcstvOzvhfDYOR8IQJlqTtX2/LfvM="
+    },
+    {
+      "secret": "sec-bravo-9876543210fedcba",
+      "method": "POST",
+      "pathAfterStrip": "/oapi/msg/sendUserMsg",
+      "rawQuery": "b=2&a=1&a=0",
+      "timestamp": "1758441600002",
+      "canonicalTarget": "/oapi/msg/sendUserMsg?a=0&a=1&b=2",
+      "expectedSignature": "Z8psqh0LER3OKQLzuJM2aqUpjHoZCcg/Ru5N5zT0rc8="
+    },
+    {
+      "secret": "sec-bravo-9876543210fedcba",
+      "method": "DELETE",
+      "pathAfterStrip": "/oapi/group/delete",
+      "rawQuery": "gid=3",
+      "timestamp": "1758441600003",
+      "canonicalTarget": "/oapi/group/delete?gid=3",
+      "expectedSignature": "oGBfhZrmge5w3RSiVOjEvkhcTyz27G8W8yCfcBqTYJ0="
+    },
+    {
+      "secret": "sec-alpha-0123456789abcdef",
+      "method": "GET",
+      "pathAfterStrip": "/oapi/OAStu/list",
+      "rawQuery": "page=1&size=20",
+      "timestamp": "1758441600004",
+      "canonicalTarget": "/oapi/OAStu/list?page=1&size=20",
+      "expectedSignature": "e4063mlXWxa3aB/yyXV7Umzvsn8o0hUIIzxdgNuQ5I0="
+    }
+  ]
+}