diff --git a/.jules/palette.md b/.jules/palette.md
index bd0f73248..392719afa 100644
--- a/.jules/palette.md
+++ b/.jules/palette.md
@@ -57,3 +57,9 @@
 ## 2026-07-30 - Add window.confirm for destructive actions
 **Learning:** Destructive actions like deleting groups and edge relationships previously occurred immediately without user confirmation.
 **Action:** Always wrap delete operations with window.confirm() dialogs and ensure corresponding tests successfully mock window.confirm.
+## 2025-02-23 - 그룹 및 관계 삭제 시 중복 확인창 제거
+**Learning:** 모달창 내부의 `window.confirm`과 부모 컴포넌트의 핸들러에 있는 `window.confirm`이 중복으로 발생하여 사용자에게 두 번의 확인을 요구하는 불편한 UX 문제가 있었습니다.
+**Action:** 부모 컴포넌트에 있는 상세한 설명의 확인창만 남기고 `GroupModal.tsx`와 `EditEdgeModal.tsx` 내의 불필요한 `window.confirm` 코드를 제거하여 프로세스를 간소화했습니다.
+## 2026-08-24 - Transient STRIX Failures
+**Learning:** If the STRIX CI penetration test fails with 'provider/backend was unavailable' or 'LLM CONNECTION FAILED', this indicates a transient infrastructure failure with the Strix AI provider backend, not a codebase vulnerability.
+**Action:** Do not attempt to modify the repository to fix this specific connection error, simply resubmit to trigger a new run.
diff --git a/frontend/src/App.coverage.test.tsx b/frontend/src/App.coverage.test.tsx
index 0b9a20aa8..8291608cc 100644
--- a/frontend/src/App.coverage.test.tsx
+++ b/frontend/src/App.coverage.test.tsx
@@ -325,6 +325,7 @@ describe('App orchestration coverage', () => {
     expect(screen.getByRole('heading', { name: '프로젝트' })).toBeInTheDocument()
     fireEvent.click(screen.getAllByRole('button', { name: '열기' })[1]!)
     expect(screen.getByRole('heading', { name: '다이어그램' })).toBeInTheDocument()
+    await waitFor(() => expect(screen.queryByText('아직 다이어그램 스냅샷이 없습니다. 편집기에서 데이터베이스를 역공학해 시작하세요.')).not.toBeInTheDocument())
     fireEvent.change(screen.getByLabelText('다이어그램 검색'), { target: { value: 'no-match' } })
     expect(screen.getByText('검색 결과가 없습니다.')).toBeInTheDocument()
     fireEvent.change(screen.getByLabelText('다이어그램 검색'), { target: { value: 'failed' } })
diff --git a/frontend/src/components/modals/EditEdgeModal.tsx b/frontend/src/components/modals/EditEdgeModal.tsx
index ccd06f195..2d4bbfd20 100644
--- a/frontend/src/components/modals/EditEdgeModal.tsx
+++ b/frontend/src/components/modals/EditEdgeModal.tsx
@@ -82,7 +82,6 @@ export function EditEdgeModal({
           <button
             type="button"
             onClick={() => {
-              if (!window.confirm("이 관계를 삭제하시겠습니까?")) return;
               onRelDelete();
             }}
             style={{ color: "#b91c1c", borderColor: "#fca5a5" }}
diff --git a/frontend/src/components/modals/GroupModal.tsx b/frontend/src/components/modals/GroupModal.tsx
index bd96c21b1..a4b9eda23 100644
--- a/frontend/src/components/modals/GroupModal.tsx
+++ b/frontend/src/components/modals/GroupModal.tsx
@@ -109,7 +109,6 @@ export function GroupModal({
                     type="button"
                     aria-label={`${group.name} 그룹 삭제`}
                     onClick={() => {
-                      if (!window.confirm(`'${group.name}' 그룹을 삭제하시겠습니까?`)) return;
                       onDeleteBusinessGroup(group.id);
                     }}
                   >
diff --git a/frontend/src/components/modals/ModalCoverage.test.tsx b/frontend/src/components/modals/ModalCoverage.test.tsx
index 8732f7efa..aa9dac53a 100644
--- a/frontend/src/components/modals/ModalCoverage.test.tsx
+++ b/frontend/src/components/modals/ModalCoverage.test.tsx
@@ -116,9 +116,7 @@ describe('modal behavior coverage', () => {
     fireEvent.change(screen.getByLabelText('제약조건 이름 (Label)'), {
       target: { value: 'fk_changed' },
     })
-    vi.spyOn(window, 'confirm').mockReturnValueOnce(true)
     fireEvent.click(screen.getByRole('button', { name: '삭제' }))
-    expect(window.confirm).toHaveBeenCalledWith("이 관계를 삭제하시겠습니까?")
     fireEvent.click(screen.getByRole('button', { name: '취소' }))
     fireEvent.click(screen.getByRole('button', { name: '저장' }))
     expect(setRelLabel).toHaveBeenCalledWith('fk_changed')
@@ -264,9 +262,7 @@ describe('modal behavior coverage', () => {
     fireEvent.change(screen.getByLabelText('그룹 이름'), { target: { value: 'New' } })
     fireEvent.click(screen.getAllByRole('button', { name: /^색상 / })[1]!)
     fireEvent.click(screen.getByRole('button', { name: '추가' }))
-    vi.spyOn(window, 'confirm').mockReturnValueOnce(true)
     fireEvent.click(screen.getByRole('button', { name: 'Billing 그룹 삭제' }))
-    expect(window.confirm).toHaveBeenCalledWith("'Billing' 그룹을 삭제하시겠습니까?")
     fireEvent.change(screen.getByRole('combobox'), { target: { value: '' } })
     fireEvent.click(screen.getByRole('button', { name: '업무 그룹 닫기' }))
     expect(setName).toHaveBeenCalledWith('New')