diff --git a/internal/app/instance_duty_adapter_test.go b/internal/app/instance_duty_adapter_test.go
new file mode 100644
index 00000000..5d7a7a22
--- /dev/null
+++ b/internal/app/instance_duty_adapter_test.go
@@ -0,0 +1,96 @@
+package app
+
+import (
+	"context"
+	"sync"
+	"testing"
+
+	"chat-agent-system/internal/projectinstance"
+
+	"github.com/jackc/pgx/v5"
+)
+
+type stubAuthorOnlyPolicy struct {
+	allowed  bool
+	revision int64
+}
+
+func (s *stubAuthorOnlyPolicy) GetAuthorOnlyApprovalPolicy(_ context.Context) (projectinstance.AuthorOnlyPolicySnapshot, error) {
+	return projectinstance.AuthorOnlyPolicySnapshot{Allowed: s.allowed, Revision: s.revision}, nil
+}
+
+func (s *stubAuthorOnlyPolicy) LockAuthorOnlyApprovalPolicy(ctx context.Context, _ pgx.Tx) (projectinstance.AuthorOnlyPolicySnapshot, error) {
+	return s.GetAuthorOnlyApprovalPolicy(ctx)
+}
+
+type stubMemberLookup struct {
+	mu  sync.Mutex
+	ids map[int64]struct{}
+}
+
+func (s *stubMemberLookup) ActiveMemberIDs(_ context.Context, _ int64) (map[int64]struct{}, error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	out := make(map[int64]struct{}, len(s.ids))
+	for id := range s.ids {
+		out[id] = struct{}{}
+	}
+	return out, nil
+}
+
+func TestProjectInstanceDutyAdapter_AuthorOnlyLive(t *testing.T) {
+	ctx := context.Background()
+	store := projectinstance.NewMemoryStore()
+	_ = projectinstance.SeedProjectMeta(store, 501, projectinstance.LifecyclePlanning, "", 1, 0)
+	svc := projectinstance.NewService(store, projectinstance.TestResolver(), nil, nil)
+	svc.SetAuthorOnlyPolicySource(&stubAuthorOnlyPolicy{allowed: true, revision: 1})
+	svc.SetActiveMemberLookup(&stubMemberLookup{ids: map[int64]struct{}{7: {}}})
+
+	plan := projectinstance.ValidTestPlan()
+	plan.Stages[0].DocTasks[0].DutyPolicy = projectinstance.DutyPolicyAuthorOnly
+	plan.Stages[0].DocTasks[0].Duties = projectinstance.DocDuty{AuthorUserID: 7}
+
+	if _, err := svc.SaveWorkflowPlan(ctx, 501, 1, true, projectinstance.SavePlanInput{
+		Plan: plan, ExpectedPlanRevision: 0, ExpectedSelectionVersion: 1,
+	}); err != nil {
+		t.Fatalf("save: %v", err)
+	}
+	preview, err := svc.ActivationPreview(ctx, 501, 1, true)
+	if err != nil {
+		t.Fatalf("preview: %v", err)
+	}
+	if _, err := svc.Activate(ctx, 501, 1, true, projectinstance.ActivateInput{
+		ConfirmationToken:      preview.ConfirmationToken,
+		ExpectedProjectVersion: preview.ExpectedProjectVersion,
+		ExpectedPlanRevision:   preview.ExpectedPlanRevision,
+	}); err != nil {
+		t.Fatalf("activate: %v", err)
+	}
+
+	adapter := &projectInstanceDutyAdapter{inst: svc}
+	author, reviewer, approver, policy, governed, err := adapter.ResolveGovernedDuty(ctx, 501, "intake")
+	if err != nil {
+		t.Fatalf("resolve: %v", err)
+	}
+	if !governed || policy != projectinstance.DutyPolicyAuthorOnly {
+		t.Fatalf("governed=%v policy=%q", governed, policy)
+	}
+	if author != 7 || reviewer != 7 || approver != 7 {
+		t.Fatalf("want 7/7/7 got %d/%d/%d", author, reviewer, approver)
+	}
+}
+
+func TestProjectInstanceDutyAdapter_NoLiveInstance(t *testing.T) {
+	ctx := context.Background()
+	store := projectinstance.NewMemoryStore()
+	_ = projectinstance.SeedProjectMeta(store, 502, projectinstance.LifecyclePlanning, "", 1, 0)
+	svc := projectinstance.NewService(store, projectinstance.TestResolver(), nil, nil)
+	adapter := &projectInstanceDutyAdapter{inst: svc}
+	_, _, _, policy, governed, err := adapter.ResolveGovernedDuty(ctx, 502, "intake")
+	if err != nil {
+		t.Fatalf("resolve: %v", err)
+	}
+	if governed || policy != "" {
+		t.Fatalf("want ungoverned, got governed=%v policy=%q", governed, policy)
+	}
+}
diff --git a/internal/bizdev/document_duty_resolve_test.go b/internal/bizdev/document_duty_resolve_test.go
index e519fc78..723f3325 100644
--- a/internal/bizdev/document_duty_resolve_test.go
+++ b/internal/bizdev/document_duty_resolve_test.go
@@ -5,14 +5,28 @@ import (
 	"testing"
 
 	"chat-agent-system/internal/docduty"
+	"chat-agent-system/internal/docgov"
 )
 
+type fakeInstanceDuty struct {
+	author, reviewer, approver int64
+	policy                     string
+	governed                   bool
+	err                        error
+	called                     bool
+}
+
+func (f *fakeInstanceDuty) ResolveGovernedDuty(_ context.Context, _ int64, _ string) (int64, int64, int64, string, bool, error) {
+	f.called = true
+	return f.author, f.reviewer, f.approver, f.policy, f.governed, f.err
+}
+
 func TestResolveTaskDocumentDuties_UsesCreatorNotHardcodedReviewer(t *testing.T) {
 	req := TaskRunRequest{
 		UserID: 170, ProjectID: 6145,
 		AuthorName: "编制人A",
 	}
-	got := resolveTaskDocumentDuties(context.Background(), nil, req)
+	got, _, _ := resolveTaskDocumentDuties(context.Background(), nil, req, nil)
 	if got.Author.UserID != 170 {
 		t.Fatalf("author want 170 got %+v", got.Author)
 	}
@@ -28,13 +42,87 @@ func TestResolveTaskDocumentDuties_IgnoresNonMemberRequestReviewer(t *testing.T)
 	req := TaskRunRequest{
 		UserID: 170, ReviewerID: 2, ReviewerName: "审核负责人",
 	}
-	got := resolveTaskDocumentDuties(context.Background(), nil, req)
+	got, _, _ := resolveTaskDocumentDuties(context.Background(), nil, req, nil)
 	if got.Reviewer.UserID != 0 {
 		t.Fatalf("request reviewer 2 is not a member: %+v", got.Reviewer)
 	}
 }
 
+func TestResolveTaskDocumentDuties_GovernedUsesInstance(t *testing.T) {
+	src := &fakeInstanceDuty{
+		author: 9, reviewer: 9, approver: 9,
+		policy: "author_only", governed: true,
+	}
+	req := TaskRunRequest{
+		UserID: 170, ProjectID: 42, TaskKey: "intake",
+		AuthorName: "编制人A", ReviewerID: 2,
+	}
+	got, policy, governed := resolveTaskDocumentDuties(context.Background(), nil, req, src)
+	if !governed || policy != "author_only" {
+		t.Fatalf("governed=%v policy=%q", governed, policy)
+	}
+	if got.Author.UserID != 9 || got.Reviewer.UserID != 9 || got.Approver.UserID != 9 {
+		t.Fatalf("want A/A/A=9, got %+v", got)
+	}
+	if !src.called {
+		t.Fatal("expected ResolveGovernedDuty called")
+	}
+}
+
+func TestResolveTaskDocumentDuties_UngovernedFallsBack(t *testing.T) {
+	src := &fakeInstanceDuty{governed: false}
+	req := TaskRunRequest{
+		UserID: 170, ProjectID: 42, TaskKey: "intake",
+		AuthorName: "编制人A",
+	}
+	got, policy, governed := resolveTaskDocumentDuties(context.Background(), nil, req, src)
+	if governed || policy != "" {
+		t.Fatalf("want ungoverned, got governed=%v policy=%q", governed, policy)
+	}
+	if got.Author.UserID != 170 {
+		t.Fatalf("author want 170 got %+v", got.Author)
+	}
+	if got.Reviewer.UserID != 0 {
+		t.Fatalf("no members → reviewer empty, got %+v", got.Reviewer)
+	}
+}
+
+func TestGovernedSkipsMemoryHealOverwrite(t *testing.T) {
+	doc := &docgov.DocumentRecord{
+		DocID: "doc_x", AuthorID: 9, AuthorName: "A",
+		ReviewerID: 9, ReviewerName: "A",
+		ApproverID: 9, ApproverName: "A",
+		DutyLocked: true, DutyPolicy: "author_only",
+	}
+	assigned := docduty.Binding{
+		Author:   docduty.Holder{UserID: 1, Name: "作者"},
+		Reviewer: docduty.Holder{UserID: 2, Name: "审核"},
+		Approver: docduty.Holder{UserID: 3, Name: "批准"},
+	}
+	memberIDs := map[int64]struct{}{1: {}, 2: {}, 3: {}, 9: {}}
+
+	governed := true
+	if !governed {
+		next, _ := docduty.HealBinding(bindingFromDoc(doc), assigned, memberIDs)
+		writeBindingToDoc(doc, next)
+	}
+	if doc.ReviewerID != 9 || doc.ApproverID != 9 {
+		t.Fatalf("governed must keep A/A/A, got R=%d Ap=%d", doc.ReviewerID, doc.ApproverID)
+	}
+
+	doc2 := &docgov.DocumentRecord{
+		DocID: "doc_y", AuthorID: 9, ReviewerID: 9, ApproverID: 9,
+	}
+	next, changed := docduty.HealBinding(bindingFromDoc(doc2), assigned, memberIDs)
+	if !changed {
+		t.Fatal("expected heal change for ungoverned path")
+	}
+	writeBindingToDoc(doc2, next)
+	if doc2.ReviewerID != 2 || doc2.ApproverID != 3 {
+		t.Fatalf("ungoverned heal want 2/3, got R=%d Ap=%d", doc2.ReviewerID, doc2.ApproverID)
+	}
+}
+
 func TestBindingFromDocRoundTrip(t *testing.T) {
-	// compile-time guard that helper stays aligned with Resolve slots
 	_ = docduty.Binding{}
 }
diff --git a/internal/docduty/duty_locked_filter_test.go b/internal/docduty/duty_locked_filter_test.go
new file mode 100644
index 00000000..a7d17773
--- /dev/null
+++ b/internal/docduty/duty_locked_filter_test.go
@@ -0,0 +1,18 @@
+package docduty
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestClearDutySlotSQL_SkipsLockedRows(t *testing.T) {
+	for _, duty := range []string{DutyReviewer, DutyApprover} {
+		sql, ok := clearDutySlotSQL(duty)
+		if !ok {
+			t.Fatalf("%s: expected sql", duty)
+		}
+		if !strings.Contains(sql, "NOT duty_locked") {
+			t.Fatalf("%s sql missing duty_locked filter:\n%s", duty, sql)
+		}
+	}
+}
diff --git a/internal/docduty/duty_locked_pg_test.go b/internal/docduty/duty_locked_pg_test.go
new file mode 100644
index 00000000..59a83306
--- /dev/null
+++ b/internal/docduty/duty_locked_pg_test.go
@@ -0,0 +1,124 @@
+package docduty
+
+import (
+	"context"
+	"fmt"
+	"testing"
+	"time"
+)
+
+func TestHealProjectDocuments_SkipsDutyLocked_PG(t *testing.T) {
+	ctx, _, pool := openDutyTestPool(t)
+	suffix := time.Now().UnixNano()
+	authorID := insertDutyUser(t, ctx, pool, suffix, "lk_author")
+	reviewerID := insertDutyUser(t, ctx, pool, suffix, "lk_reviewer")
+	approverID := insertDutyUser(t, ctx, pool, suffix, "lk_approver")
+
+	var projectID int64
+	if err := pool.QueryRow(ctx, `
+		INSERT INTO projects (code, name, status, creator_user_id)
+		VALUES ($1, $2, 'active', $3)
+		RETURNING id
+	`, fmt.Sprintf("duty-lock-%d", suffix), "locked heal", authorID).Scan(&projectID); err != nil {
+		t.Fatalf("insert project: %v", err)
+	}
+	t.Cleanup(func() {
+		_, _ = pool.Exec(context.Background(), `DELETE FROM document_records WHERE project_id = $1`, projectID)
+		_, _ = pool.Exec(context.Background(), `DELETE FROM project_members WHERE project_id = $1`, projectID)
+		_, _ = pool.Exec(context.Background(), `DELETE FROM projects WHERE id = $1`, projectID)
+		_, _ = pool.Exec(context.Background(), `DELETE FROM users WHERE id IN ($1,$2,$3)`, authorID, reviewerID, approverID)
+	})
+
+	if _, err := pool.Exec(ctx, `
+		INSERT INTO project_members (project_id, user_id, project_role, document_duty, status, joined_at, updated_at)
+		VALUES ($1, $2, 'owner', 'author', 'active', now(), now()),
+		       ($1, $3, 'member', 'reviewer', 'active', now(), now()),
+		       ($1, $4, 'member', 'approver', 'active', now(), now())
+	`, projectID, authorID, reviewerID, approverID); err != nil {
+		t.Fatalf("insert members: %v", err)
+	}
+
+	lockedDoc := fmt.Sprintf("doc_proj%d_intake", projectID)
+	openDoc := fmt.Sprintf("doc_proj%d_research", projectID)
+	// 锁定文档：A/A/A，与项目默认分离职责不同
+	insertDutyDoc(t, ctx, pool, projectID, lockedDoc, "intake", authorID, authorID, authorID)
+	if _, err := pool.Exec(ctx, `
+		UPDATE document_records
+		SET duty_locked = true, duty_policy = 'author_only'
+		WHERE doc_id = $1
+	`, lockedDoc); err != nil {
+		t.Fatalf("lock doc: %v", err)
+	}
+	// 未锁定文档：错误槽位，应被 heal 纠正
+	insertDutyDoc(t, ctx, pool, projectID, openDoc, "research", authorID, 0, 0)
+
+	_, n, err := HealProjectDocuments(ctx, pool, projectID)
+	if err != nil {
+		t.Fatalf("heal: %v", err)
+	}
+	if n == 0 {
+		t.Fatal("expected unlocked doc to be healed")
+	}
+
+	assertDocAuthorID(t, ctx, pool, lockedDoc, authorID)
+	assertDocReviewer(t, ctx, pool, lockedDoc, authorID)
+	assertDocApprover(t, ctx, pool, lockedDoc, authorID)
+	assertDocReviewer(t, ctx, pool, openDoc, reviewerID)
+	assertDocApprover(t, ctx, pool, openDoc, approverID)
+}
+
+func TestApplySlotRevocations_SkipsDutyLocked_PG(t *testing.T) {
+	ctx, _, pool := openDutyTestPool(t)
+	suffix := time.Now().UnixNano()
+	authorID := insertDutyUser(t, ctx, pool, suffix, "rv_author")
+	reviewerID := insertDutyUser(t, ctx, pool, suffix, "rv_reviewer")
+
+	var projectID int64
+	if err := pool.QueryRow(ctx, `
+		INSERT INTO projects (code, name, status, creator_user_id)
+		VALUES ($1, $2, 'active', $3)
+		RETURNING id
+	`, fmt.Sprintf("duty-revlock-%d", suffix), "locked revoke", authorID).Scan(&projectID); err != nil {
+		t.Fatalf("insert project: %v", err)
+	}
+	t.Cleanup(func() {
+		_, _ = pool.Exec(context.Background(), `DELETE FROM document_records WHERE project_id = $1`, projectID)
+		_, _ = pool.Exec(context.Background(), `DELETE FROM project_members WHERE project_id = $1`, projectID)
+		_, _ = pool.Exec(context.Background(), `DELETE FROM projects WHERE id = $1`, projectID)
+		_, _ = pool.Exec(context.Background(), `DELETE FROM users WHERE id IN ($1,$2)`, authorID, reviewerID)
+	})
+	if _, err := pool.Exec(ctx, `
+		INSERT INTO project_members (project_id, user_id, project_role, document_duty, status, joined_at, updated_at)
+		VALUES ($1, $2, 'owner', 'author', 'active', now(), now()),
+		       ($1, $3, 'member', 'reviewer', 'active', now(), now())
+	`, projectID, authorID, reviewerID); err != nil {
+		t.Fatalf("insert members: %v", err)
+	}
+
+	lockedDoc := fmt.Sprintf("doc_proj%d_intake", projectID)
+	openDoc := fmt.Sprintf("doc_proj%d_research", projectID)
+	insertDutyDoc(t, ctx, pool, projectID, lockedDoc, "intake", authorID, reviewerID, 0)
+	insertDutyDoc(t, ctx, pool, projectID, openDoc, "research", authorID, reviewerID, 0)
+	if _, err := pool.Exec(ctx, `
+		UPDATE document_records SET duty_locked = true, duty_policy = 'author_only' WHERE doc_id = $1
+	`, lockedDoc); err != nil {
+		t.Fatalf("lock: %v", err)
+	}
+
+	tx, err := pool.Begin(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := ApplySlotRevocations(ctx, tx, projectID, PlanSlotRevocations(MemberDutyChange{
+		UserID: reviewerID, PreviousDuty: DutyReviewer, NextDuty: DutyNone,
+	})); err != nil {
+		_ = tx.Rollback(ctx)
+		t.Fatal(err)
+	}
+	if err := tx.Commit(ctx); err != nil {
+		t.Fatal(err)
+	}
+
+	assertDocReviewer(t, ctx, pool, lockedDoc, reviewerID)
+	assertDocReviewer(t, ctx, pool, openDoc, 0)
+}
diff --git a/internal/docgov/duty_lock_test.go b/internal/docgov/duty_lock_test.go
new file mode 100644
index 00000000..16373e6a
--- /dev/null
+++ b/internal/docgov/duty_lock_test.go
@@ -0,0 +1,55 @@
+package docgov
+
+import (
+	"context"
+	"testing"
+)
+
+func TestLockDocumentDuty_Memory(t *testing.T) {
+	ctx := context.Background()
+	engine := NewGovernanceEngine(nil)
+	doc, err := engine.CreateOrGetDocument(
+		ctx, "doc_lock_mem", 9, "intake", "锁定测试",
+		"V0.5", "ws/lock",
+		1, "A", 1, "A", 1, "A",
+	)
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	if doc.DutyLocked || doc.DutyPolicy != "" {
+		t.Fatalf("defaults: locked=%v policy=%q", doc.DutyLocked, doc.DutyPolicy)
+	}
+	if err := engine.LockDocumentDuty(ctx, doc.DocID, "author_only"); err != nil {
+		t.Fatalf("lock: %v", err)
+	}
+	got, err := engine.GetDocument(ctx, doc.DocID)
+	if err != nil {
+		t.Fatalf("get: %v", err)
+	}
+	if !got.DutyLocked || got.DutyPolicy != "author_only" {
+		t.Fatalf("after lock: locked=%v policy=%q", got.DutyLocked, got.DutyPolicy)
+	}
+}
+
+func TestListWorkflowDocuments_IncludesDutyPolicy_Memory(t *testing.T) {
+	ctx := context.Background()
+	engine := NewGovernanceEngine(nil)
+	doc, err := engine.CreateOrGetDocument(
+		ctx, "doc_proj9_intake", 9, "intake", "投影测试",
+		"V0.5", "ws/proj",
+		7, "编制", 7, "编制", 7, "编制",
+	)
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	if err := engine.LockDocumentDuty(ctx, doc.DocID, "author_only"); err != nil {
+		t.Fatalf("lock: %v", err)
+	}
+	list, err := engine.ListWorkflowDocumentsByProject(ctx, 9)
+	if err != nil {
+		t.Fatalf("list: %v", err)
+	}
+	if len(list) != 1 || list[0].DutyPolicy != "author_only" {
+		t.Fatalf("want duty_policy=author_only, got %+v", list)
+	}
+}