diff --git a/src/main/java/com/yunhai/formcenter/controller/api/FormResolveController.java b/src/main/java/com/yunhai/formcenter/controller/api/FormResolveController.java
index f580759..37c2efd 100644
--- a/src/main/java/com/yunhai/formcenter/controller/api/FormResolveController.java
+++ b/src/main/java/com/yunhai/formcenter/controller/api/FormResolveController.java
@@ -1,9 +1,8 @@
 package com.yunhai.formcenter.controller.api;
 
 import com.yunhai.formcenter.model.FormModels;
+import com.yunhai.formcenter.service.FormAccessPolicy;
 import com.yunhai.formcenter.service.FormDefService;
-import com.yunhai.platform.apistd.BizException;
-import com.yunhai.platform.utils.exception.ErrorCode;
 import com.yunhai.platform.utils.model.BoaUser;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -43,18 +42,7 @@ public class FormResolveController {
     public FormModels.ResolvedFormView resolve(BoaUser user,
                                                @RequestParam("code") String code,
                                                @RequestParam(value = "appCode", required = false) String appCode) {
-        return defService.resolve(requireSessionSchId(user),
+        return defService.resolve(FormAccessPolicy.requireSessionSchId(user, "当前身份无学校归属，无法解析表单"),
                 appCode == null || appCode.trim().isEmpty() ? DEFAULT_APP_CODE : appCode.trim(), code);
     }
-
-    /** 会话校（无学校归属的身份不能寻址表单——区域组/根直属用户不是填报主体） */
-    private Long requireSessionSchId(BoaUser user) {
-        if (user == null || user.getId() == null) {
-            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
-        }
-        if (user.getCurrentRole() == null || user.getCurrentRole().getSchId() == null) {
-            throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属，无法解析表单");
-        }
-        return Long.valueOf(user.getCurrentRole().getSchId());
-    }
 }
diff --git a/src/main/java/com/yunhai/formcenter/service/AnswerReadService.java b/src/main/java/com/yunhai/formcenter/service/AnswerReadService.java
index 73a1d4e..8727f3c 100644
--- a/src/main/java/com/yunhai/formcenter/service/AnswerReadService.java
+++ b/src/main/java/com/yunhai/formcenter/service/AnswerReadService.java
@@ -85,7 +85,7 @@ public class AnswerReadService {
         query.setScopes(scopeService.resolve(user, form));
         query.setUserId(user == null ? null : user.getId());
         // T10 方案 §5.1：SCHOOL 范围的谓词基准=会话学校（不是查询域，两者同源于会话校但语义不同）
-        query.setViewerSchId(user == null ? null : sessionSchId(user));
+        query.setViewerSchId(FormAccessPolicy.sessionSchId(user));
         query.setStatus(req == null ? null : trimToNull(req.getStatus()));
         query.setFilters(resolveFilters(form, req == null ? null : req.getFilters()));
         return query;
@@ -283,13 +283,7 @@ public class AnswerReadService {
      * 普通用户只能看自己的答卷（submitter_id=会话用户），无数据管理权。
      */
     public List<ReadModels.RowView> listBySubmitter(BoaUser user, String formCode, String appCode) {
-        if (user == null || user.getId() == null) {
-            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
-        }
-        Long schId = sessionSchId(user);
-        if (schId == null) {
-            throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属");
-        }
+        Long schId = FormAccessPolicy.requireSessionSchId(user, "当前身份无学校归属");
         String app = (appCode == null || appCode.trim().isEmpty()) ? "form-center" : appCode.trim();
         // 与填报页加载同一条解析（契约 §1 resolve 是读接口唯一入口）：不存在=PARAM_ERROR、未发布/停用=CUSTOM
         Form form = defService.resolvePublished(schId, app, formCode).form();
@@ -313,13 +307,7 @@ public class AnswerReadService {
      */
     @Transactional
     public void softDeleteBySubmitter(BoaUser user, String answerId) {
-        if (user == null || user.getId() == null) {
-            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
-        }
-        Long schId = sessionSchId(user);
-        if (schId == null) {
-            throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属");
-        }
+        Long schId = FormAccessPolicy.requireSessionSchId(user, "当前身份无学校归属");
         Answer answer = requireLiveAnswer(schId, answerId);
         if (!answer.getSubmitterId().equals(user.getId())) {
             throw new BizException(ErrorCode.FORBIDDEN, "只能删除自己提交的答卷");
@@ -341,13 +329,7 @@ public class AnswerReadService {
      */
     @Transactional
     public ReadModels.RowView editBySubmitter(BoaUser user, String answerId, JsonNode values, String summary) {
-        if (user == null || user.getId() == null) {
-            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
-        }
-        Long schId = sessionSchId(user);
-        if (schId == null) {
-            throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属");
-        }
+        Long schId = FormAccessPolicy.requireSessionSchId(user, "当前身份无学校归属");
         Answer answer = requireLiveAnswer(schId, answerId);
         if (!answer.getSubmitterId().equals(user.getId())) {
             throw new BizException(ErrorCode.FORBIDDEN, "只能编辑自己提交的答卷");
@@ -395,13 +377,7 @@ public class AnswerReadService {
      * 所以填表人（学生）不授权任何管理模块行也能用自己的两视图。</p>
      */
     public List<MyModels.ItemView> listMine(BoaUser user, boolean bySubject) {
-        if (user == null || user.getId() == null) {
-            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
-        }
-        Long schId = sessionSchId(user);
-        if (schId == null) {
-            throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属");
-        }
+        Long schId = FormAccessPolicy.requireSessionSchId(user, "当前身份无学校归属");
         List<Answer> answers = bySubject
                 ? answerRepository.findBySchIdAndSubjectIdOrderByIdDesc(schId, user.getId())
                 : answerRepository.findBySchIdAndSubmitterIdOrderByIdDesc(schId, user.getId());
@@ -427,13 +403,7 @@ public class AnswerReadService {
      * 改状态在这一面压根没有入口——V14/V29。
      */
     public ReadModels.DetailView myDetail(BoaUser user, String answerId) {
-        if (user == null || user.getId() == null) {
-            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
-        }
-        Long schId = sessionSchId(user);
-        if (schId == null) {
-            throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属");
-        }
+        Long schId = FormAccessPolicy.requireSessionSchId(user, "当前身份无学校归属");
         Answer answer = requireLiveAnswer(schId, answerId);
         boolean mine = user.getId().equals(answer.getSubmitterId()) || user.getId().equals(answer.getSubjectId());
         if (!mine) {
@@ -468,12 +438,6 @@ public class AnswerReadService {
         return item;
     }
 
-    /** 会话校（Integer→Long 换算走已有字段，契约 §7 身份行：外部不传） */
-    private static Long sessionSchId(BoaUser user) {
-        Integer schId = user.getCurrentRole() == null ? null : user.getCurrentRole().getSchId();
-        return schId == null ? null : Long.valueOf(schId);
-    }
-
     /** 表单头表静默取数：答卷归属的表单理论上一定在（P32 连软删的都还在），取不到就让表名列降级为空 */
     private Form findFormQuietly(Long schId, String formUuid) {
         try {
diff --git a/src/main/java/com/yunhai/formcenter/service/AnswerService.java b/src/main/java/com/yunhai/formcenter/service/AnswerService.java
index 1c7578a..f0c6026 100644
--- a/src/main/java/com/yunhai/formcenter/service/AnswerService.java
+++ b/src/main/java/com/yunhai/formcenter/service/AnswerService.java
@@ -138,7 +138,7 @@ public class AnswerService {
     }
 
     private AnswerModels.SubmitView doSubmit(BoaUser user, AnswerModels.SubmitRequest req, String idempotencyKey) {
-        Long schId = requireSessionSchId(user);
+        Long schId = FormAccessPolicy.requireSessionSchId(user, "当前身份无学校归属，不能提交答卷");
         Integer submitterId = user.getId();
         String appCode = req.getAppCode() == null || req.getAppCode().trim().isEmpty()
                 ? DEFAULT_APP_CODE : req.getAppCode().trim();
@@ -359,21 +359,11 @@ public class AnswerService {
         return clean;
     }
 
-    private Long requireSessionSchId(BoaUser user) {
-        if (user == null || user.getId() == null) {
-            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
-        }
-        if (user.getCurrentRole() == null || user.getCurrentRole().getSchId() == null) {
-            throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属，不能提交答卷");
-        }
-        return Long.valueOf(user.getCurrentRole().getSchId());
-    }
-
     private boolean belongsToCaller(Answer answer, BoaUser user) {
         // 会话校 + 提交人共同界定"这条幂等记录是不是你的"（uk 是库级的，跨账号命中不能放行）
+        Long sessionSch = FormAccessPolicy.sessionSchId(user);
         return answer.getSubmitterId() != null && answer.getSubmitterId().equals(user.getId())
-                && user.getCurrentRole() != null && user.getCurrentRole().getSchId() != null
-                && answer.getSchId() != null && answer.getSchId().longValue() == user.getCurrentRole().getSchId();
+                && sessionSch != null && answer.getSchId() != null && answer.getSchId().equals(sessionSch);
     }
 
     private static String newUuid() {
diff --git a/src/main/java/com/yunhai/formcenter/service/DataScopeService.java b/src/main/java/com/yunhai/formcenter/service/DataScopeService.java
index 1c972f2..c23b9b0 100644
--- a/src/main/java/com/yunhai/formcenter/service/DataScopeService.java
+++ b/src/main/java/com/yunhai/formcenter/service/DataScopeService.java
@@ -10,8 +10,6 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 
-import java.util.ArrayList;
-import java.util.Collections;
 import java.util.EnumSet;
 import java.util.LinkedHashSet;
 import java.util.List;
@@ -53,14 +51,6 @@ import java.util.Set;
 @RequiredArgsConstructor
 public class DataScopeService {
 
-    /** 超管用户类型（同 FormAdminGuard：不是 roleId，是 UserBase 的用户类型） */
-    private static final int SUPER_ADMIN_TYPE = 1;
-
-    private static final int ROLE_TEACHER = 1;
-    private static final int ROLE_SCHOOL_LEADER = 2;
-    private static final int ROLE_STUDENT = 3;
-    private static final int ROLE_ADMIN = 7;
-
     private final List<AnswerScopeImplementor> implementors;
     private final AdminScopeSource adminScopeSource;
 
@@ -74,7 +64,7 @@ public class DataScopeService {
         if (user == null || user.getId() == null) {
             throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
         }
-        if (user.getType() != null && user.getType() == SUPER_ADMIN_TYPE) {
+        if (FormAccessPolicy.isSuperAdmin(user)) {
             return EnumSet.of(DataScope.ALL);
         }
         Set<DataScope> scopes = new LinkedHashSet<>();
@@ -86,7 +76,7 @@ public class DataScopeService {
         // 2) 身份默认矩阵，roleId 逐个取默认后并起来（多来源取最宽）
         int audience = form == null || form.getAudience() == null
                 ? FormEnums.Audience.STUDENT.getCode() : form.getAudience();
-        for (Integer roleId : identityRoleIds(user)) {
+        for (Integer roleId : FormAccessPolicy.identityRoleIds(user)) {
             scopes.add(defaultScope(roleId, audience));
         }
         if (scopes.isEmpty()) {
@@ -133,7 +123,7 @@ public class DataScopeService {
         if (form == null || form.getSchId() == null) {
             return null;
         }
-        Long ownSch = sessionSchId(user);
+        Long ownSch = FormAccessPolicy.sessionSchId(user);
         if (ownSch == null) {
             // 会话给不出学校：既没有"本校表单"可认，SCHOOL 也没有比对基准——不给任何升级
             return null;
@@ -153,32 +143,16 @@ public class DataScopeService {
         return null;
     }
 
-    /**
-     * 参与矩阵解析的身份：{@code roleIds}（用户全部正常态角色）并上会话 {@code currentRole.roleId}
-     * ——会话身份理论上必在 roleIds 内，并一次是防 UserBase 两侧不一致时漏掉当前身份那一格。
-     */
-    private List<Integer> identityRoleIds(BoaUser user) {
-        List<Integer> ids = new ArrayList<>();
-        if (user.getRoleIds() != null) {
-            ids.addAll(user.getRoleIds());
-        }
-        Integer current = user.getCurrentRole() == null ? null : user.getCurrentRole().getRoleId();
-        if (current != null && !ids.contains(current)) {
-            ids.add(current);
-        }
-        return ids.isEmpty() ? Collections.<Integer>emptyList() : ids;
-    }
-
     /** 矩阵取格（任教班级在一期落到"仅本人提交"，见类注释表格） */
     private DataScope defaultScope(Integer roleId, int audience) {
         boolean studentFacing = FormEnums.Audience.STUDENT.getCode() == audience;
         if (roleId == null) {
             return DataScope.SELF_SUBMITTED;
         }
-        if (roleId == ROLE_ADMIN || roleId == ROLE_SCHOOL_LEADER) {
+        if (roleId == FormAccessPolicy.ROLE_ADMIN || roleId == FormAccessPolicy.ROLE_SCHOOL_LEADER) {
             return DataScope.ALL;
         }
-        if (roleId == ROLE_TEACHER) {
+        if (roleId == FormAccessPolicy.ROLE_TEACHER) {
             if (!studentFacing) {
                 return DataScope.SELF_SUBMITTED;
             }
@@ -186,16 +160,10 @@ public class DataScopeService {
             log.debug("[数据范围] 教师×面向学生：任教班级一期未开放，按矩阵注记生效为仅本人提交");
             return DataScope.SELF_SUBMITTED;
         }
-        if (roleId == ROLE_STUDENT && studentFacing) {
+        if (roleId == FormAccessPolicy.ROLE_STUDENT && studentFacing) {
             return DataScope.ABOUT_ME;
         }
         // 学生×面向教师、家长(4)/工作号(6)/局领导(5)、以及未知角色：兜底
         return DataScope.SELF_SUBMITTED;
     }
-
-    /** 会话校（Integer→Long 换算；无当前身份或无学校归属=null，两表升级不参与） */
-    private static Long sessionSchId(BoaUser user) {
-        Integer schId = user.getCurrentRole() == null ? null : user.getCurrentRole().getSchId();
-        return schId == null ? null : Long.valueOf(schId);
-    }
 }
diff --git a/src/main/java/com/yunhai/formcenter/service/FillAccessService.java b/src/main/java/com/yunhai/formcenter/service/FillAccessService.java
index f536a1e..f5324ae 100644
--- a/src/main/java/com/yunhai/formcenter/service/FillAccessService.java
+++ b/src/main/java/com/yunhai/formcenter/service/FillAccessService.java
@@ -8,8 +8,6 @@ import com.yunhai.platform.utils.model.BoaUser;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
-import java.util.ArrayList;
-import java.util.Collections;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.Set;
@@ -50,14 +48,6 @@ import java.util.Set;
 @RequiredArgsConstructor
 public class FillAccessService {
 
-    /** 超管用户类型（同 {@link FormAdminGuard}/{@link DataScopeService}：不是 roleId，是 UserBase 的用户类型） */
-    private static final int SUPER_ADMIN_TYPE = 1;
-
-    private static final int ROLE_TEACHER = 1;
-    private static final int ROLE_SCHOOL_LEADER = 2;
-    private static final int ROLE_STUDENT = 3;
-    private static final int ROLE_ADMIN = 7;
-
     private final AdminScopeSource adminScopeSource;
 
     /** 填报入口层（{@link #resolve} 的元素；未命中任何层=空集，语义即任务书里的 NONE） */
@@ -83,17 +73,18 @@ public class FillAccessService {
             throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
         }
         Set<Tier> tiers = EnumSet.noneOf(Tier.class);
-        List<Integer> roleIds = identityRoleIds(user);
-        if (isSuperAdmin(user) || grantedByAdminTables(user, form) || holdsAdminRole(roleIds)) {
+        List<Integer> roleIds = FormAccessPolicy.identityRoleIds(user);
+        if (FormAccessPolicy.isSuperAdmin(user) || grantedByAdminTables(user, form) || holdsAdminRole(roleIds)) {
             tiers.add(Tier.ADMIN);
         }
         boolean studentFacing = FormEnums.Audience.STUDENT.getCode()
                 == (form == null || form.getAudience() == null
                         ? FormEnums.Audience.STUDENT.getCode() : form.getAudience());
-        if (studentFacing && roleIds.contains(ROLE_TEACHER)) {
+        if (studentFacing && roleIds.contains(FormAccessPolicy.ROLE_TEACHER)) {
             tiers.add(Tier.MANAGE);
         }
-        if (studentFacing ? roleIds.contains(ROLE_STUDENT) : roleIds.contains(ROLE_TEACHER)) {
+        if (studentFacing ? roleIds.contains(FormAccessPolicy.ROLE_STUDENT)
+                : roleIds.contains(FormAccessPolicy.ROLE_TEACHER)) {
             tiers.add(Tier.FILL);
         }
         return tiers;
@@ -137,37 +128,20 @@ public class FillAccessService {
      * 基础表单的管理员同样是管理员；校域不变式（{@code answer.sch_id}=会话校）也不因代填而变。</p>
      */
     private boolean grantedByAdminTables(BoaUser user, Form form) {
-        Long ownSch = sessionSchId(user);
+        Long ownSch = FormAccessPolicy.sessionSchId(user);
         if (ownSch != null && adminScopeSource.isSchoolAdmin(ownSch, user.getId())) {
             return true;
         }
         return form != null && adminScopeSource.isFormAdmin(form.getUuid(), user.getId());
     }
 
-    /** 校领导(2)/管理员(7)：平台标准角色里的管理身份（契约 §8 矩阵那两行同一个因子） */
+    /** 校领导(2)/管理员(7)：平台标准角色里的管理身份（清单单点在 {@link FormAccessPolicy#SCHOOL_LEADER_ROLES}） */
     private static boolean holdsAdminRole(List<Integer> roleIds) {
-        return roleIds.contains(ROLE_ADMIN) || roleIds.contains(ROLE_SCHOOL_LEADER);
-    }
-
-    /** 参与解析的身份：{@code roleIds}（全部正常态角色）并上会话 {@code currentRole.roleId}（同 DataScopeService） */
-    private static List<Integer> identityRoleIds(BoaUser user) {
-        List<Integer> ids = new ArrayList<>();
-        if (user.getRoleIds() != null) {
-            ids.addAll(user.getRoleIds());
+        for (Integer roleId : roleIds) {
+            if (roleId != null && FormAccessPolicy.SCHOOL_LEADER_ROLES.contains(roleId)) {
+                return true;
+            }
         }
-        Integer current = user.getCurrentRole() == null ? null : user.getCurrentRole().getRoleId();
-        if (current != null && !ids.contains(current)) {
-            ids.add(current);
-        }
-        return ids.isEmpty() ? Collections.<Integer>emptyList() : ids;
-    }
-
-    private static boolean isSuperAdmin(BoaUser user) {
-        return user.getType() != null && user.getType() == SUPER_ADMIN_TYPE;
-    }
-
-    private static Long sessionSchId(BoaUser user) {
-        Integer schId = user.getCurrentRole() == null ? null : user.getCurrentRole().getSchId();
-        return schId == null ? null : Long.valueOf(schId);
+        return false;
     }
 }
diff --git a/src/main/java/com/yunhai/formcenter/service/FillableFormService.java b/src/main/java/com/yunhai/formcenter/service/FillableFormService.java
index 680c15f..ac6f516 100644
--- a/src/main/java/com/yunhai/formcenter/service/FillableFormService.java
+++ b/src/main/java/com/yunhai/formcenter/service/FillableFormService.java
@@ -3,8 +3,6 @@ package com.yunhai.formcenter.service;
 import com.yunhai.formcenter.entity.Form;
 import com.yunhai.formcenter.model.MyModels;
 import com.yunhai.formcenter.repository.FormRepository;
-import com.yunhai.platform.apistd.BizException;
-import com.yunhai.platform.utils.exception.ErrorCode;
 import com.yunhai.platform.utils.model.BoaUser;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -60,7 +58,7 @@ public class FillableFormService {
      * @return 已按 deadline/code 排好序的行集；无权限的人拿到的是空集而不是异常
      */
     public List<MyModels.FillableRow> listFillable(BoaUser user, String appCode) {
-        Long schId = requireSessionSchId(user);
+        Long schId = FormAccessPolicy.requireSessionSchId(user, "当前身份无学校归属");
         String cleanApp = appCode == null ? "" : appCode.trim();
         List<Long> domain = Form.PLATFORM_SCH_ID == schId
                 ? Collections.singletonList(Form.PLATFORM_SCH_ID)
@@ -121,15 +119,4 @@ public class FillableFormService {
         }
         return rows;
     }
-
-    /** 会话校（同 {@code AnswerService} 的口径：未登录与无学校归属两段分开拒，文案与 my 面其余端点一致） */
-    private static Long requireSessionSchId(BoaUser user) {
-        if (user == null || user.getId() == null) {
-            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
-        }
-        if (user.getCurrentRole() == null || user.getCurrentRole().getSchId() == null) {
-            throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属");
-        }
-        return Long.valueOf(user.getCurrentRole().getSchId());
-    }
 }
diff --git a/src/main/java/com/yunhai/formcenter/service/FormAccessPolicy.java b/src/main/java/com/yunhai/formcenter/service/FormAccessPolicy.java
new file mode 100644
index 0000000..0c231b2
--- /dev/null
+++ b/src/main/java/com/yunhai/formcenter/service/FormAccessPolicy.java
@@ -0,0 +1,151 @@
+package com.yunhai.formcenter.service;
+
+import com.yunhai.formcenter.enums.FormEnums;
+import com.yunhai.platform.apistd.BizException;
+import com.yunhai.platform.utils.exception.ErrorCode;
+import com.yunhai.platform.utils.model.BoaUser;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.EnumSet;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * 会话身份推导的<b>唯一出口</b>（契约 v2 §2.5 / T12）：把"这个会话是谁、属于哪个校、算哪几种身份"
+ * 从原先六处各自抄一遍的私有实现收编成一处，角色魔法数字同样单点定义（B3/B5）。
+ *
+ * <p><b>本批次（T12）只做收编，不做语义</b>：判定逻辑、拒绝文案与各调用点原有实现逐字等价，
+ * 语义切换（两档范围、audience 门、校管理员判定）在 T13 于本门面之上进行。</p>
+ *
+ * <p><b>形态说明</b>：会话/身份推导是<b>静态</b>单点方法——原实现本就是各调用类的 private static
+ * （纯字段换算，无协作者），做成实例方法要给每个消费方加构造器入参，会连带改动 T1~T11 期间
+ * 直接 new 这些服务的单测，与"零语义变化"批次的判据冲突。需要协作者（两表）的
+ * {@link #isSchoolAdmin(BoaUser)} 保持实例方法，由 Spring 装配消费方注入。</p>
+ *
+ * <p><b>红线（V58）</b>：全库只允许本类持有角色数字常量与校领导清单；新守卫一律调本门面，
+ * 不许再抄 {@code type==1} / {@code roleIds.contains(2)} 这类字面量。</p>
+ */
+@Component
+@RequiredArgsConstructor
+public class FormAccessPolicy {
+
+    /** 超管用户类型（UserBase {@code UserTypeEnum.SUPER_ADMIN}；不是 roleId） */
+    public static final int SUPER_ADMIN_TYPE = 1;
+
+    /** 平台标准角色：教师 */
+    public static final int ROLE_TEACHER = 1;
+    /** 平台标准角色：校领导 */
+    public static final int ROLE_SCHOOL_LEADER = 2;
+    /** 平台标准角色：学生 */
+    public static final int ROLE_STUDENT = 3;
+    /** 平台标准角色：管理员 */
+    public static final int ROLE_ADMIN = 7;
+
+    /**
+     * 校领导角色清单——<b>临时值</b>，P-B 待 UserBase 正名（G2 裁决：现网三处既用值升格为单点常量，
+     * 正名后只改这一处，调用面与语义零变化）。
+     */
+    public static final Set<Integer> SCHOOL_LEADER_ROLES =
+            Collections.unmodifiableSet(new HashSet<>(Arrays.asList(ROLE_SCHOOL_LEADER, ROLE_ADMIN)));
+
+    private final AdminScopeSource adminScopeSource;
+
+    /** 会话学校；无当前身份、无学校归属或会话为空 → null（调用侧自行决定拒绝口径） */
+    public static Long sessionSchId(BoaUser user) {
+        Integer schId = user == null || user.getCurrentRole() == null ? null : user.getCurrentRole().getSchId();
+        return schId == null ? null : Long.valueOf(schId);
+    }
+
+    /**
+     * 会话学校（必须给得出的形态）：未登录 {@code UNAUTHORIZED}，无学校归属 {@code FORBIDDEN}。
+     *
+     * @param noSchoolMessage 各调用面原有文案（T12 统一文案未开始，逐点沿用）
+     */
+    public static Long requireSessionSchId(BoaUser user, String noSchoolMessage) {
+        if (user == null || user.getId() == null) {
+            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
+        }
+        Long schId = sessionSchId(user);
+        if (schId == null) {
+            throw new BizException(ErrorCode.FORBIDDEN, noSchoolMessage);
+        }
+        return schId;
+    }
+
+    /** 会话用户 id（平台全局身份，非本库自增主键）；未登录为 null */
+    public static Integer uid(BoaUser user) {
+        return user == null ? null : user.getId();
+    }
+
+    /** 超管（UserBase 用户类型判定；不是 roleId） */
+    public static boolean isSuperAdmin(BoaUser user) {
+        return user != null && user.getType() != null && user.getType() == SUPER_ADMIN_TYPE;
+    }
+
+    /**
+     * 参与身份解析的角色集合：{@code roleIds}（全部正常态角色）并上会话 {@code currentRole.roleId}。
+     * 并一次是防 UserBase 两侧不一致时漏掉当前身份那一格（原 {@code DataScopeService} 口径）。
+     */
+    public static List<Integer> identityRoleIds(BoaUser user) {
+        if (user == null) {
+            return Collections.emptyList();
+        }
+        List<Integer> ids = new ArrayList<>();
+        if (user.getRoleIds() != null) {
+            ids.addAll(user.getRoleIds());
+        }
+        Integer current = user.getCurrentRole() == null ? null : user.getCurrentRole().getRoleId();
+        if (current != null && !ids.contains(current)) {
+            ids.add(current);
+        }
+        return ids;
+    }
+
+    /**
+     * 会话持有的<b>填报身份类型</b>（多身份取并集）：含学生角色(3)→{@code STUDENT}、含教师角色(1)→{@code TEACHER}。
+     *
+     * <p>返回值永不含 {@code ANONYMOUS}——匿名只对匿名通道生效，登录会话不可能持有它（C1）。
+     * 家长(4)/局领导(5)/工作号(6) 与未知角色不产生任何填报身份。</p>
+     */
+    public static Set<FormEnums.Audience> identityTypes(BoaUser user) {
+        Set<FormEnums.Audience> types = EnumSet.noneOf(FormEnums.Audience.class);
+        for (Integer roleId : identityRoleIds(user)) {
+            if (roleId == null) {
+                continue;
+            }
+            if (roleId == ROLE_STUDENT) {
+                types.add(FormEnums.Audience.STUDENT);
+            } else if (roleId == ROLE_TEACHER) {
+                types.add(FormEnums.Audience.TEACHER);
+            }
+        }
+        return types;
+    }
+
+    /**
+     * 是否<b>校管理员</b>（契约 v2 §2.2）：超管 ∪ 校领导角色清单命中 ∪ {@code school_admin} 表命中会话校。
+     *
+     * <p>T12 仅落定义，消费方在 T13 的两档范围解析与管理面守卫切换里接入；
+     * {@code school_admin} 表被删空时天然角色仍是兜底。</p>
+     */
+    public boolean isSchoolAdmin(BoaUser user) {
+        if (user == null) {
+            return false;
+        }
+        if (isSuperAdmin(user)) {
+            return true;
+        }
+        for (Integer roleId : identityRoleIds(user)) {
+            if (roleId != null && SCHOOL_LEADER_ROLES.contains(roleId)) {
+                return true;
+            }
+        }
+        Long schId = sessionSchId(user);
+        return schId != null && user.getId() != null && adminScopeSource.isSchoolAdmin(schId, user.getId());
+    }
+}
diff --git a/src/main/java/com/yunhai/formcenter/service/FormAdminGuard.java b/src/main/java/com/yunhai/formcenter/service/FormAdminGuard.java
index dbb009f..8921c6d 100644
--- a/src/main/java/com/yunhai/formcenter/service/FormAdminGuard.java
+++ b/src/main/java/com/yunhai/formcenter/service/FormAdminGuard.java
@@ -35,9 +35,6 @@ import java.util.Set;
 @RequiredArgsConstructor
 public class FormAdminGuard {
 
-    /** 超管用户类型（UserBase UserTypeEnum.SUPER_ADMIN） */
-    private static final int SUPER_ADMIN_TYPE = 1;
-
     /** 定义管理模块行 path（手册 §2.2：表单设计） */
     public static final String MODULE_FORM_DESIGN = "/admin/forms";
     /** 数据管理模块行 path */
@@ -63,17 +60,17 @@ public class FormAdminGuard {
         if (user == null || user.getId() == null) {
             throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
         }
-        if (isSuperAdmin(user)) {
+        if (FormAccessPolicy.isSuperAdmin(user)) {
             if (targetSchId != null) {
                 return targetSchId;
             }
-            Long current = currentSchId(user);
+            Long current = FormAccessPolicy.sessionSchId(user);
             if (current != null) {
                 return current;
             }
             throw new BizException(ErrorCode.PARAM_ERROR, "超管请显式指定 schId（当前身份无学校归属）");
         }
-        Long current = currentSchId(user);
+        Long current = FormAccessPolicy.sessionSchId(user);
         if (!hasModule(user, modulePath)) {
             throw new BizException(ErrorCode.FORBIDDEN, "无该模块权限：" + modulePath);
         }
@@ -105,10 +102,10 @@ public class FormAdminGuard {
         if (user == null || user.getId() == null) {
             return false;
         }
-        if (isSuperAdmin(user)) {
+        if (FormAccessPolicy.isSuperAdmin(user)) {
             return true;
         }
-        if (currentSchId(user) == null) {
+        if (FormAccessPolicy.sessionSchId(user) == null) {
             return false;
         }
         Set<String> paths = authorizedPaths(user);
@@ -128,7 +125,7 @@ public class FormAdminGuard {
         if (modulePaths == null || modulePaths.length == 0) {
             throw new BizException(ErrorCode.INTERNAL_SERVER_ERROR, "模块行清单为空（调用方写错了）");
         }
-        if (isSuperAdmin(user)) {
+        if (FormAccessPolicy.isSuperAdmin(user)) {
             return requireAdmin(user, targetSchId, modulePaths[0]);
         }
         Set<String> held = authorizedPaths(user);
@@ -162,7 +159,7 @@ public class FormAdminGuard {
         if (user == null || user.getId() == null) {
             throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
         }
-        if (isSuperAdmin(user)) {
+        if (FormAccessPolicy.isSuperAdmin(user)) {
             // 超管的域语义原样交给 requireAdmin：显式目标域（含 0=平台级）优先，不在这里换默认值
             return requireAdmin(user, targetSchId, MODULE_DATA_MANAGE);
         }
@@ -170,7 +167,7 @@ public class FormAdminGuard {
             // 取不到表单与"不是你域内的表单"同一口径：存在性本身就是探测面（契约 §1 uuid 不可枚举）
             throw new BizException(ErrorCode.PARAM_ERROR, "表单不存在");
         }
-        Long current = currentSchId(user);
+        Long current = FormAccessPolicy.sessionSchId(user);
         if (current == null) {
             throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属，不能确定查询域");
         }
@@ -189,17 +186,6 @@ public class FormAdminGuard {
 
     /** 是否被授权某个模块行（path 精确匹配；超管直接放行） */
     private boolean hasModule(BoaUser user, String modulePath) {
-        return isSuperAdmin(user) || authorizedPaths(user).contains(modulePath);
-    }
-
-    private boolean isSuperAdmin(BoaUser user) {
-        return user.getType() != null && user.getType() == SUPER_ADMIN_TYPE;
-    }
-
-    private Long currentSchId(BoaUser user) {
-        if (user.getCurrentRole() == null || user.getCurrentRole().getSchId() == null) {
-            return null;
-        }
-        return Long.valueOf(user.getCurrentRole().getSchId());
+        return FormAccessPolicy.isSuperAdmin(user) || authorizedPaths(user).contains(modulePath);
     }
 }
diff --git a/src/main/java/com/yunhai/formcenter/service/FormFileService.java b/src/main/java/com/yunhai/formcenter/service/FormFileService.java
index 1a24c0a..cbe5e07 100644
--- a/src/main/java/com/yunhai/formcenter/service/FormFileService.java
+++ b/src/main/java/com/yunhai/formcenter/service/FormFileService.java
@@ -103,7 +103,7 @@ public class FormFileService {
             throw new BizException(ErrorCode.PARAM_ERROR,
                     "单文件不得超过 50MB（当前 " + (file.getSize() / 1024 / 1024) + "MB）");
         }
-        Long schId = requireSessionSchId(user);
+        Long schId = FormAccessPolicy.requireSessionSchId(user, "当前身份无学校归属，不能上传附件");
         String original = sanitizeName(file.getOriginalFilename());
         String ext = requireSafeExt(original);
         String key = "form/" + LocalDate.now().format(YEAR) + "/" + LocalDate.now().format(MONTH)
@@ -197,14 +197,4 @@ public class FormFileService {
         }
         return sb.toString();
     }
-
-    private Long requireSessionSchId(BoaUser user) {
-        if (user == null || user.getId() == null) {
-            throw new BizException(ErrorCode.UNAUTHORIZED, "未登录");
-        }
-        if (user.getCurrentRole() == null || user.getCurrentRole().getSchId() == null) {
-            throw new BizException(ErrorCode.FORBIDDEN, "当前身份无学校归属，不能上传附件");
-        }
-        return Long.valueOf(user.getCurrentRole().getSchId());
-    }
 }