diff --git a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/facade/ProjectionSecurityRuntimePermissionFacade.java b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/facade/ProjectionSecurityRuntimePermissionFacade.java
index 6375a801..5d08867d 100644
--- a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/facade/ProjectionSecurityRuntimePermissionFacade.java
+++ b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/application/muse/facade/ProjectionSecurityRuntimePermissionFacade.java
@@ -56,8 +56,7 @@ public class ProjectionSecurityRuntimePermissionFacade implements SecurityRuntim
         requireCompleteRequest(request);
         Long tenantId = TenantContextHolder.getRequiredTenantId();
         MuseToolGrantDO grant = toolGrantMapper.selectRuntimeApprovedGrant(tenantId, request.operationId(),
-                request.targetType(), request.targetId(), request.targetKey(), request.sourceSnapshotId(),
-                request.agentId());
+                request.targetType(), request.targetId(), request.targetKey(), request.agentId());
         if (!isApprovedSecurityProjection(grant)) {
             // Security projection 不存在或不是 approved/active/security 时，AI runtime 只能拒绝执行。
             throw new ServiceException(AI_RUNTIME_PERMISSION_DENIED);
@@ -113,7 +112,8 @@ public class ProjectionSecurityRuntimePermissionFacade implements SecurityRuntim
         requireTextEquals(scope, "operationId", request.operationId());
         requireTextEquals(scope, "targetType", request.targetType());
         requireMatchingTargetFields(scope, request);
-        requireTextEquals(scope, "sourceSnapshotId", request.sourceSnapshotId());
+        // sourceSnapshotId 是单次执行的运行时证据(随机生成)，按设计不参与能力授权命中(详见 MuseToolGrantMapper 注释)，
+        // 仅由 summary() 记入 envelope 作事后审计；requireCompleteRequest 仍要求其非空(执行证据必须存在)。
         requireTextEquals(scope, "agentId", String.valueOf(request.agentId()));
 
         List<Map<String, String>> resourceRefs = resourceRefs(scope.get("resourceRefs"));
diff --git a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/dal/mysql/muse/MuseToolGrantMapper.java b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/dal/mysql/muse/MuseToolGrantMapper.java
index 34e481a0..b082c086 100644
--- a/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/dal/mysql/muse/MuseToolGrantMapper.java
+++ b/muse-cloud/muse-module-ai/muse-module-ai-server/src/main/java/cn/iocoder/muse/module/ai/dal/mysql/muse/MuseToolGrantMapper.java
@@ -27,6 +27,11 @@ public interface MuseToolGrantMapper extends BaseMapperX<MuseToolGrantDO> {
      * <p>P1R-4 还没有接入 Security 主流程 RPC，只能消费已落库的 ToolGrant 投影。查询必须固定
      * security owner、approved、active 三个条件；scope 必须显式携带本次 runtime 可消费的资源引用，避免 AI
      * 模块把普通审批号或缺字段投影当成 runtime envelope。</p>
+     *
+     * <p>命中按「能力授权」粒度匹配 operationId/targetType/targetId·targetKey/agentId/resourceRefs——均为可预登记的稳定标识。
+     * sourceSnapshotId 是单次执行的运行时证据(每次随机 "src-"+UUID 生成)，属事后审计字段而非授权条件：若纳入命中，
+     * 等于要求预登记 grant 预知未来随机值，逻辑无解(任何 AI 执行都永远 fail-closed)。故剥离出命中条件，
+     * 仅由 runtime envelope summary 记录追溯(见 ProjectionSecurityRuntimePermissionFacade)。</p>
      */
     @Select("""
             <script>
@@ -47,7 +52,6 @@ public interface MuseToolGrantMapper extends BaseMapperX<MuseToolGrantDO> {
                AND scope ->> 'ownerType' IN ('system', 'user', 'work', 'knowledge', 'market')
                AND scope ->> 'operationId' = #{operationId}
                AND scope ->> 'targetType' = #{targetType}
-               AND scope ->> 'sourceSnapshotId' = #{sourceSnapshotId}
                AND scope ->> 'agentId' = #{agentIdText}
                AND jsonb_typeof(scope -> 'resourceRefs') = 'array'
                AND jsonb_array_length(scope -> 'resourceRefs') > 0
@@ -85,21 +89,19 @@ public interface MuseToolGrantMapper extends BaseMapperX<MuseToolGrantDO> {
                                                @Param("targetId") Long targetId,
                                                @Param("targetIdText") String targetIdText,
                                                @Param("targetKey") String targetKey,
-                                               @Param("sourceSnapshotId") String sourceSnapshotId,
                                                @Param("agentId") Long agentId,
                                                @Param("agentIdText") String agentIdText);
 
     default MuseToolGrantDO selectRuntimeApprovedGrant(Long tenantId, String operationId, String targetType,
-                                                       Long targetId, String targetKey, String sourceSnapshotId) {
+                                                       Long targetId, String targetKey) {
         return selectRuntimeApprovedGrant(tenantId, operationId, targetType, targetId,
-                targetId == null ? null : String.valueOf(targetId), targetKey, sourceSnapshotId, null, null);
+                targetId == null ? null : String.valueOf(targetId), targetKey, null, null);
     }
 
     default MuseToolGrantDO selectRuntimeApprovedGrant(Long tenantId, String operationId, String targetType,
-                                                       Long targetId, String targetKey, String sourceSnapshotId,
-                                                       Long agentId) {
+                                                       Long targetId, String targetKey, Long agentId) {
         return selectRuntimeApprovedGrant(tenantId, operationId, targetType, targetId,
-                targetId == null ? null : String.valueOf(targetId), targetKey, sourceSnapshotId, agentId,
+                targetId == null ? null : String.valueOf(targetId), targetKey, agentId,
                 agentId == null ? null : String.valueOf(agentId));
     }
 
diff --git a/muse-cloud/muse-module-ai/muse-module-ai-server/src/test/java/cn/iocoder/muse/module/ai/application/muse/MuseAiTaskServiceTest.java b/muse-cloud/muse-module-ai/muse-module-ai-server/src/test/java/cn/iocoder/muse/module/ai/application/muse/MuseAiTaskServiceTest.java
index 3b11287b..ff9f21d9 100644
--- a/muse-cloud/muse-module-ai/muse-module-ai-server/src/test/java/cn/iocoder/muse/module/ai/application/muse/MuseAiTaskServiceTest.java
+++ b/muse-cloud/muse-module-ai/muse-module-ai-server/src/test/java/cn/iocoder/muse/module/ai/application/muse/MuseAiTaskServiceTest.java
@@ -1161,7 +1161,7 @@ class MuseAiTaskServiceTest extends BaseMockitoUnitTest {
         when(contentWorkOwnerFacade.buildSourceSnapshot(any()))
                 .thenReturn(sourceSnapshot("src-projection", 9001L, null, 7001L, 8, List.of()));
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-projection", 10L)).thenReturn(toolGrant(301L, 10L, "approved",
+                "work:9001", 10L)).thenReturn(toolGrant(301L, 10L, "approved",
                 "active", "security"));
         when(agentMapper.selectById(10L)).thenReturn(agent(10L, "system", null));
         when(agentVersionMapper.selectByAgentIdAndVersion(10L, "2")).thenReturn(agentVersion(100L, 10L, "2"));
diff --git a/muse-cloud/muse-module-ai/muse-module-ai-server/src/test/java/cn/iocoder/muse/module/ai/application/muse/facade/ProjectionSecurityRuntimePermissionFacadeTest.java b/muse-cloud/muse-module-ai/muse-module-ai-server/src/test/java/cn/iocoder/muse/module/ai/application/muse/facade/ProjectionSecurityRuntimePermissionFacadeTest.java
index d2e9c402..d3588b59 100644
--- a/muse-cloud/muse-module-ai/muse-module-ai-server/src/test/java/cn/iocoder/muse/module/ai/application/muse/facade/ProjectionSecurityRuntimePermissionFacadeTest.java
+++ b/muse-cloud/muse-module-ai/muse-module-ai-server/src/test/java/cn/iocoder/muse/module/ai/application/muse/facade/ProjectionSecurityRuntimePermissionFacadeTest.java
@@ -43,7 +43,7 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
                 new SecurityRuntimePermissionFacade.RuntimePermissionRequest("createAiTask", 1001L, 1001L,
                         "aiTask", 9001L, "work:9001", "src-approved", 10L, 100L);
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-approved", 10L)).thenReturn(approvedGrant());
+                "work:9001", 10L)).thenReturn(approvedGrant());
 
         SecurityRuntimePermissionFacade.RuntimePermissionEnvelopeIssue issue = facade.issue(request);
 
@@ -71,7 +71,7 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
                 new SecurityRuntimePermissionFacade.RuntimePermissionRequest("createAiTask", 1001L, 1001L,
                         "aiTask", 9001L, "work:9001", "src-missing", 10L, 100L);
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-missing", 10L)).thenReturn(null);
+                "work:9001", 10L)).thenReturn(null);
 
         ServiceException exception = assertThrows(ServiceException.class, () -> facade.issue(request));
 
@@ -85,7 +85,7 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
                 new SecurityRuntimePermissionFacade.RuntimePermissionRequest("createAiTask", 1001L, 1001L,
                         "aiTask", 9999L, "work:9999", "src-approved", 10L, 100L);
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9999L,
-                "work:9999", "src-approved", 10L)).thenReturn(approvedGrant());
+                "work:9999", 10L)).thenReturn(approvedGrant());
 
         ServiceException exception = assertThrows(ServiceException.class, () -> facade.issue(request));
 
@@ -99,13 +99,13 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
                 new SecurityRuntimePermissionFacade.RuntimePermissionRequest("createAiTask", 1001L, 1001L,
                         "aiTask", 9001L, "work:9001", "src-approved", 10L, 100L);
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-approved", 10L)).thenReturn(approvedGrantWithScope(null));
+                "work:9001", 10L)).thenReturn(approvedGrantWithScope(null));
 
         ServiceException missingScope = assertThrows(ServiceException.class, () -> facade.issue(request));
         assertEquals(AI_RUNTIME_PERMISSION_DENIED.getCode(), missingScope.getCode());
 
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-approved", 10L)).thenReturn(approvedGrantWithScope("{}"));
+                "work:9001", 10L)).thenReturn(approvedGrantWithScope("{}"));
 
         ServiceException emptyScope = assertThrows(ServiceException.class, () -> facade.issue(request));
         assertEquals(AI_RUNTIME_PERMISSION_DENIED.getCode(), emptyScope.getCode());
@@ -118,7 +118,7 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
                 new SecurityRuntimePermissionFacade.RuntimePermissionRequest("createAiTask", 1001L, 1001L,
                         "aiTask", 9001L, "work:9001", "src-approved", 10L, 100L);
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-approved", 10L)).thenReturn(approvedGrant(Map.of("operationId", "testAgent")));
+                "work:9001", 10L)).thenReturn(approvedGrant(Map.of("operationId", "testAgent")));
 
         ServiceException exception = assertThrows(ServiceException.class, () -> facade.issue(request));
 
@@ -132,7 +132,7 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
                 new SecurityRuntimePermissionFacade.RuntimePermissionRequest("createAiTask", 1001L, 1001L,
                         "aiTask", 9001L, "work:9001", "src-approved", 10L, 100L);
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-approved", 10L)).thenReturn(approvedGrant(Map.of("crossWorkAllowed", true)));
+                "work:9001", 10L)).thenReturn(approvedGrant(Map.of("crossWorkAllowed", true)));
 
         SecurityRuntimePermissionFacade.RuntimePermissionEnvelopeIssue issue = facade.issue(request);
 
@@ -157,8 +157,18 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
     }
 
     @Test
-    void should_failClosedWhenSourceSnapshotIdMissing() {
-        assertDeniedForScope(missingScopeField("sourceSnapshotId"));
+    void should_issueWhenScopeOmitsSourceSnapshotId() {
+        // 修正后 sourceSnapshotId 不再是命中条件：grant scope 不带它也应成功签发(能力授权粒度)，
+        // sourceSnapshotId 仍从 request 记入 envelope summary 作审计。
+        TenantContextHolder.setTenantId(100L);
+        SecurityRuntimePermissionFacade.RuntimePermissionRequest request = approvedRequest();
+        when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
+                "work:9001", 10L)).thenReturn(approvedGrant(missingScopeField("sourceSnapshotId")));
+
+        SecurityRuntimePermissionFacade.RuntimePermissionEnvelopeIssue issue = facade.issue(request);
+
+        assertTrue(issue.runtimePermissionEnvelopeId().startsWith("rpe-local-"));
+        assertEquals("src-approved", issue.summary().get("sourceSnapshotId"));
     }
 
     @Test
@@ -171,7 +181,7 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
         TenantContextHolder.setTenantId(100L);
         SecurityRuntimePermissionFacade.RuntimePermissionRequest request = approvedRequest();
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-approved", 10L)).thenReturn(approvedGrantWithScope(JsonUtils.toJsonString(Map.of(
+                "work:9001", 10L)).thenReturn(approvedGrantWithScope(JsonUtils.toJsonString(Map.of(
                         "scopeType", "work",
                         "ownerType", "user",
                         "resourceRefs", List.of(Map.of("resourceType", "work", "resourceId", "9001"))))));
@@ -186,7 +196,7 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
         TenantContextHolder.setTenantId(100L);
         SecurityRuntimePermissionFacade.RuntimePermissionRequest request = approvedRequest();
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-approved", 10L)).thenReturn(approvedGrant(Map.of("crossWorkAllowed", true,
+                "work:9001", 10L)).thenReturn(approvedGrant(Map.of("crossWorkAllowed", true,
                 "resourceRefs", List.of(Map.of("resourceType", "work", "resourceId", "9002")))));
 
         ServiceException exception = assertThrows(ServiceException.class, () -> facade.issue(request));
@@ -209,7 +219,7 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
     @Test
     void should_keepMapperSqlFailClosedForRuntimeScopeFields() throws Exception {
         Method method = MuseToolGrantMapper.class.getMethod("selectRuntimeApprovedGrant", Long.class, String.class,
-                String.class, Long.class, String.class, String.class, String.class, Long.class, String.class);
+                String.class, Long.class, String.class, String.class, Long.class, String.class);
         String sql = String.join("\n", method.getAnnotation(org.apache.ibatis.annotations.Select.class).value());
 
         assertTrue(sql.contains("NULLIF(#{agentIdText}, '') IS NOT NULL"));
@@ -217,8 +227,9 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
         assertTrue(sql.contains("scope ->> 'ownerType' IN"));
         assertTrue(sql.contains("scope ->> 'operationId' = #{operationId}"));
         assertTrue(sql.contains("scope ->> 'targetType' = #{targetType}"));
-        assertTrue(sql.contains("scope ->> 'sourceSnapshotId' = #{sourceSnapshotId}"));
         assertTrue(sql.contains("scope ->> 'agentId' = #{agentIdText}"));
+        // 修正：sourceSnapshotId 已从命中条件剥离，SQL 不应再出现该字段(执行证据不参与能力授权命中)。
+        assertEquals(-1, sql.indexOf("sourceSnapshotId"));
         assertTrue(sql.contains("(#{targetIdText} IS NOT NULL AND scope ->> 'targetId' = #{targetIdText})"));
         assertTrue(sql.contains("(#{targetKey} IS NOT NULL AND scope ->> 'targetKey' = #{targetKey})"));
         assertTrue(sql.contains("jsonb_array_length(scope -> 'resourceRefs') > 0"));
@@ -228,7 +239,6 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
         assertTrue(sql.contains("LIMIT 1"));
         assertEquals(-1, sql.indexOf("NOT jsonb_exists(scope, 'operationId')"));
         assertEquals(-1, sql.indexOf("NOT jsonb_exists(scope, 'targetType')"));
-        assertEquals(-1, sql.indexOf("NOT jsonb_exists(scope, 'sourceSnapshotId')"));
         assertEquals(-1, sql.indexOf("NOT jsonb_exists(scope, 'agentId')"));
     }
 
@@ -236,7 +246,7 @@ class ProjectionSecurityRuntimePermissionFacadeTest extends BaseMockitoUnitTest
         TenantContextHolder.setTenantId(100L);
         SecurityRuntimePermissionFacade.RuntimePermissionRequest request = approvedRequest();
         when(toolGrantMapper.selectRuntimeApprovedGrant(100L, "createAiTask", "aiTask", 9001L,
-                "work:9001", "src-approved", 10L)).thenReturn(approvedGrant(overrideScope));
+                "work:9001", 10L)).thenReturn(approvedGrant(overrideScope));
 
         ServiceException exception = assertThrows(ServiceException.class, () -> facade.issue(request));