diff --git a/web/src/lib/projectSettingsDuties.ts b/web/src/lib/projectSettingsDuties.ts
index b7eb24c1..98ed3a9c 100644
--- a/web/src/lib/projectSettingsDuties.ts
+++ b/web/src/lib/projectSettingsDuties.ts
@@ -12,17 +12,62 @@ export function classifyClientDuty(duty?: DocDuty): ClientDutyMode {
   return 'partial';
 }
 
+/** 对齐 Go ResolveDocTaskDuty：author_only 仅要求编制人，有效三职派生为 A/A/A。 */
+export function resolveClientDocTaskDuty(task: DocTaskPlan): {
+  mode: ClientDutyMode;
+  effective: DocDuty;
+  isAuthorOnly: boolean;
+} {
+  if (!task.enabled) {
+    return { mode: 'none', effective: {}, isAuthorOnly: false };
+  }
+  const policy = (task.duty_policy || '').trim();
+  if (policy === 'author_only') {
+    const author = task.duties?.author_user_id ?? 0;
+    if (author <= 0) {
+      return { mode: 'partial', effective: {}, isAuthorOnly: true };
+    }
+    return {
+      mode: 'full',
+      effective: {
+        author_user_id: author,
+        reviewer_user_id: author,
+        approver_user_id: author,
+      },
+      isAuthorOnly: true,
+    };
+  }
+  if (policy && policy !== 'separated') {
+    return { mode: 'partial', effective: {}, isAuthorOnly: false };
+  }
+  const mode = classifyClientDuty(task.duties);
+  return { mode, effective: { ...(task.duties || {}) }, isAuthorOnly: false };
+}
+
 export function canToggleHumanApproval(task: Pick<DocTaskPlan, 'approval_configurable'>, planning: boolean): boolean {
   return planning && Boolean(task.approval_configurable);
 }
 
 export function toggleHumanApproval(task: DocTaskPlan, managed: boolean): DocTaskPlan {
   if (!managed) {
-    return { ...task, duties: {} };
+    return { ...task, duty_policy: '', duties: {} };
   }
   return { ...task };
 }
 
+/** 切换兼任模式：开启时只保留编制人并清空审核/批准；关闭时清除 duty_policy。 */
+export function toggleAuthorOnly(task: DocTaskPlan, enabled: boolean): DocTaskPlan {
+  if (!enabled) {
+    return { ...task, duty_policy: '' };
+  }
+  const author = task.duties?.author_user_id;
+  return {
+    ...task,
+    duty_policy: 'author_only',
+    duties: author ? { author_user_id: author } : {},
+  };
+}
+
 export function clientDutyIssues(
   plan: WorkflowPlan,
   members: Array<{ userId: number }>,
@@ -35,9 +80,50 @@ export function clientDutyIssues(
     .flatMap((stage) => stage.doc_tasks.filter((task) => task.enabled));
 
   for (const task of enabled) {
-    const mode = classifyClientDuty(task.duties);
     const field = `${task.task_key}.duties`;
     const label = task.task_title || task.task_key;
+    const policy = (task.duty_policy || '').trim();
+
+    if (policy && policy !== 'separated' && policy !== 'author_only') {
+      issues.push({
+        code: 'UNKNOWN_DUTY_POLICY',
+        field: `${task.task_key}.duty_policy`,
+        message: `文档「${label}」的职责模式无效`,
+      });
+      continue;
+    }
+
+    if (policy === 'author_only') {
+      const author = task.duties?.author_user_id ?? 0;
+      if (author <= 0) {
+        issues.push({
+          code: 'AUTHOR_ONLY_AUTHOR_REQUIRED',
+          field,
+          message: `文档「${label}」兼任模式必须指定编制人`,
+        });
+        continue;
+      }
+      const reviewer = task.duties?.reviewer_user_id ?? 0;
+      const approver = task.duties?.approver_user_id ?? 0;
+      if ((reviewer > 0 && reviewer !== author) || (approver > 0 && approver !== author)) {
+        issues.push({
+          code: 'AUTHOR_ONLY_DUTY_CONFLICT',
+          field,
+          message: `文档「${label}」兼任模式不能指定与编制人不同的审核人或批准人`,
+        });
+        continue;
+      }
+      if (!memberIDs.has(author)) {
+        issues.push({
+          code: 'DUTY_ASSIGNEE_NOT_ACTIVE_MEMBER',
+          field: `${task.task_key}.author`,
+          message: `文档「${label}」的负责人不是当前成员`,
+        });
+      }
+      continue;
+    }
+
+    const { mode, effective } = resolveClientDocTaskDuty(task);
     if (mode === 'partial') {
       issues.push({
         code: 'DUTY_PARTIAL_ASSIGNMENT',
@@ -55,7 +141,7 @@ export function clientDutyIssues(
       continue;
     }
     if (mode === 'full') {
-      const ids = [task.duties.author_user_id, task.duties.reviewer_user_id, task.duties.approver_user_id];
+      const ids = [effective.author_user_id, effective.reviewer_user_id, effective.approver_user_id];
       if (new Set(ids).size !== ids.length) {
         issues.push({
           code: 'SEPARATION_OF_DUTY_VIOLATION',
@@ -64,9 +150,9 @@ export function clientDutyIssues(
         });
       }
       for (const [role, id] of [
-        ['author', task.duties.author_user_id],
-        ['reviewer', task.duties.reviewer_user_id],
-        ['approver', task.duties.approver_user_id],
+        ['author', effective.author_user_id],
+        ['reviewer', effective.reviewer_user_id],
+        ['approver', effective.approver_user_id],
       ] as const) {
         if (id && !memberIDs.has(id)) {
           issues.push({
@@ -82,13 +168,16 @@ export function clientDutyIssues(
 }
 
 export function needsThreeMembersForDuties(plan: WorkflowPlan, requireApprovalKeys: string[] = []): boolean {
-  return plan.stages.some((stage) =>
-    stage.enabled &&
-    stage.doc_tasks.some((task) => {
-      if (!task.enabled) return false;
-      if (!task.approval_configurable || requireApprovalKeys.includes(task.task_key)) return true;
-      return classifyClientDuty(task.duties) === 'full';
-    }),
+  return plan.stages.some(
+    (stage) =>
+      stage.enabled &&
+      stage.doc_tasks.some((task) => {
+        if (!task.enabled) return false;
+        const { mode, isAuthorOnly } = resolveClientDocTaskDuty(task);
+        if (isAuthorOnly) return false;
+        if (!task.approval_configurable || requireApprovalKeys.includes(task.task_key)) return true;
+        return mode === 'full';
+      }),
   );
 }
 
diff --git a/web/src/types/projectSettings.ts b/web/src/types/projectSettings.ts
index f060febb..71246f5a 100644
--- a/web/src/types/projectSettings.ts
+++ b/web/src/types/projectSettings.ts
@@ -4,11 +4,15 @@ export interface DocDuty {
   approver_user_id?: number;
 }
 
+export type DutyPolicy = 'separated' | 'author_only';
+
 export interface DocTaskPlan {
   task_key: string;
   task_title?: string;
   enabled: boolean;
   approval_configurable?: boolean;
+  /** 逐文档职责模式；缺省/空值按 separated 解读。 */
+  duty_policy?: DutyPolicy | '';
   duties: DocDuty;
 }
 
@@ -48,6 +52,12 @@ export interface WorkflowEventSummary {
   created_at: string;
 }
 
+export interface GovernancePolicyCapability {
+  allowed: boolean;
+  revision: number;
+  blocked_reason?: string;
+}
+
 export interface ProjectSettings {
   project_id: number;
   lifecycle_status: string;
@@ -62,6 +72,7 @@ export interface ProjectSettings {
   live_instance?: { id: number; status: string; config_revision: number };
   published_workflows?: PublishedOption[];
   recent_workflow_events?: WorkflowEventSummary[];
+  author_only_policy?: GovernancePolicyCapability;
 }
 
 export interface TerminationPreview {
@@ -72,6 +83,12 @@ export interface TerminationPreview {
   impact?: string;
 }
 
+export interface PreviewDocRef {
+  task_key: string;
+  title: string;
+  author_user_id?: number;
+}
+
 export interface ActivationPreview {
   confirmation_token: string;
   plan_hash: string;
@@ -85,7 +102,9 @@ export interface ActivationPreview {
     governed_doc_tasks?: number;
     unmanaged_doc_tasks?: number;
     assigned_duties: number;
-    unmanaged_documents?: Array<{ task_key: string; title: string }>;
+    author_only_doc_tasks?: number;
+    unmanaged_documents?: PreviewDocRef[];
+    author_only_documents?: PreviewDocRef[];
     first_stage_key?: string;
     first_stage_name?: string;
   };