diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java
index dce70497..6a340dde 100644
--- a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java
@@ -1906,7 +1906,9 @@ public class AihrPracticeSeedService {
         String scenarioId = firstNonBlank(request == null ? null : request.scenarioId(), "fee-parking");
         ScenarioSeed scenario = resolveScenario(scenarioId, null);
         String traineeName = firstNonBlank(request == null ? null : request.traineeName(), extPartyId);
-        String source = firstNonBlank(request == null ? null : request.source(), "manual");
+        // Assignment source is a server-owned classification. Client supplied values
+        // must not turn a manual supervisor assignment into a daily/retry/camp record.
+        String source = "manual";
         String reason = firstNonBlank(request == null ? null : request.reason(), "主管派发专项训练");
         Timestamp createdAt = Timestamp.valueOf(now);
         jdbcTemplate.update("""
diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java
index 04010c5e..b89b21e3 100644
--- a/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java
@@ -109,6 +109,17 @@ public class AihrPracticeSeedServiceTest {
         assertEquals("缺少员工ID，无法派发专项训练", error.getMessage());
     }
 
+    @Test
+    public void supervisorAssignmentSourceIsServerOwned() throws Exception {
+        String source = Files.readString(Path.of("src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java"));
+        int methodStart = source.indexOf("public PracticeAssignmentResponse createAssignment(PracticeAssignmentRequest request)");
+        int methodEnd = source.indexOf("public PracticeAssignmentResponse createAssignment(PracticeAssignmentRequest request, String supervisorExtPartyId)", methodStart);
+        String method = source.substring(methodStart, methodEnd);
+
+        assertTrue(method.contains("String source = \"manual\""));
+        assertFalse(method.contains("request.source()"));
+    }
+
     @Test
     public void newHireWindowUsesInclusiveThreeMonthBoundary() {
         LocalDate asOf = LocalDate.of(2026, 7, 14);
diff --git a/docs/BRD_IMPLEMENTATION_AUDIT.md b/docs/BRD_IMPLEMENTATION_AUDIT.md
index 606c5def..767f8f60 100644
--- a/docs/BRD_IMPLEMENTATION_AUDIT.md
+++ b/docs/BRD_IMPLEMENTATION_AUDIT.md
@@ -269,3 +269,4 @@
 - 2026-07-14 BRD 6.3 SOP 来源标识修复：SOP 检索成功时前端原先忽略 API 返回的 `records`，后端返回的内置记录也没有来源字段，可能把演示文档显示成真实知识库；现 API 成功态只使用响应记录，内置记录明确标记 `source=demo`，失败/未检索态继续保留已有回退提示。未修改知识库数据或生产环境。
 - 2026-07-14 当前线上资源复核：生产根站、`/h5/` 和 `/prod-api/auth/tenant/list` 均返回 `200`；线上管理端 `index-CJZ3Ax3Z.js` SHA-256 为 `8b9278a26ccb760abce489b12a20b221748c64d4c4153613d2511777bb9677bc`，当前分支构建 `index-B3bSjqdi.js` SHA-256 为 `2ff13b11307631f9cd672247d6d08e395fb674ac5b9c6f7c4fb27832eacdf075`；线上 H5 `index-D4-NrEpb.js` SHA-256 为 `ab15bfd17cabe58e2f34b0ac61ee198a837128ed85dc6bb0ddf77bc3e22dcd9c`，当前分支构建 `index-8gZKJTho.js` SHA-256 为 `c6b01faeba4198cb7ff9f5c2ffa88f1cc97c8ecdf20be86f432ca7a1d673f3e1`。本轮只读核验，未执行生产静态资源同步、后端重启或业务数据写入。
 - 2026-07-14 BRD 4.4 场景派发覆盖复核：数据库已有 12 个生活顾问场景，但移动端主管“指派专项”和“复盘后再练”此前只提供 3 个静态场景，导致其余已启用场景无法从主管入口使用；现改为 API 优先加载已启用场景，失败时保留 3 个本地兜底。BRD 所称 7–14 天专项训练营目前仍只有 `source='camp'` 标签，没有训练营计划、天数、每日任务、进度和完成规则，需 HR 确认内容与运营口径后再实现，不以标签冒充训练营闭环。
+- 2026-07-14 BRD G3/M5 派发来源完整性复核：主管派发接口此前信任客户端 `source`，理论上可把手工派发伪装成 `daily`、`retry` 或 `camp`，污染每日题、低分再练和训练营统计；现将主管创建任务的来源固定为服务端 `manual`，`daily/retry` 仍只由各自系统路径生成。新增服务源码回归测试与 `demo-check` marker，未修改生产数据。
diff --git a/scripts/demo-check.sh b/scripts/demo-check.sh
index 2f1ddaff..d75909fc 100755
--- a/scripts/demo-check.sh
+++ b/scripts/demo-check.sh
@@ -517,6 +517,7 @@ contains mobile-uni/src/pages/supervisor/review/index.vue "人工贡献分"
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/controller/AihrMobileController.java "/practice/reviews/{id}/reviewed"
 contains mobile-uni/src/pages/supervisor/review/index.vue "标记已复盘"
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java "source = 'retry'"
+contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java 'String source = "manual"'
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java "isWithinNewHireWindow"
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java "allow-legacy-daily-drill-fallback"
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java "isLegacyDailyDrillFallbackEnabled"