diff --git a/packages/frontend/src/components/MkPagingButtons.vue b/packages/frontend/src/components/MkPagingButtons.vue
index 80fabacb19..bd8dbdccd8 100644
--- a/packages/frontend/src/components/MkPagingButtons.vue
+++ b/packages/frontend/src/components/MkPagingButtons.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <div :class="$style.root">
 	<MkButton primary :disabled="min === current" @click="onToPrevButtonClicked">&lt;</MkButton>
diff --git a/packages/frontend/src/components/MkRoleSelectDialog.vue b/packages/frontend/src/components/MkRoleSelectDialog.vue
index b5fffe1964..8b0c1b9d3e 100644
--- a/packages/frontend/src/components/MkRoleSelectDialog.vue
+++ b/packages/frontend/src/components/MkRoleSelectDialog.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <MkModalWindow
 	ref="windowEl"
diff --git a/packages/frontend/src/components/MkTagItem.vue b/packages/frontend/src/components/MkTagItem.vue
index da2152b959..93c20a2d6e 100644
--- a/packages/frontend/src/components/MkTagItem.vue
+++ b/packages/frontend/src/components/MkTagItem.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <div :class="$style.root" @click="(ev) => emit('click', ev)">
 	<span v-if="iconClass" :class="[$style.icon, iconClass]"/>
diff --git a/packages/frontend/src/components/grid/MkDataCell.vue b/packages/frontend/src/components/grid/MkDataCell.vue
index 1c5690a04f..3cde0c560a 100644
--- a/packages/frontend/src/components/grid/MkDataCell.vue
+++ b/packages/frontend/src/components/grid/MkDataCell.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <td
 	ref="rootEl"
diff --git a/packages/frontend/src/components/grid/MkDataRow.vue b/packages/frontend/src/components/grid/MkDataRow.vue
index 9605930d45..bbb54b9cef 100644
--- a/packages/frontend/src/components/grid/MkDataRow.vue
+++ b/packages/frontend/src/components/grid/MkDataRow.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <tr
 	:class="[
diff --git a/packages/frontend/src/components/grid/MkGrid.vue b/packages/frontend/src/components/grid/MkGrid.vue
index f1b50d47c3..9ae04d7c2c 100644
--- a/packages/frontend/src/components/grid/MkGrid.vue
+++ b/packages/frontend/src/components/grid/MkGrid.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <table
 	ref="rootEl"
diff --git a/packages/frontend/src/components/grid/MkHeaderCell.vue b/packages/frontend/src/components/grid/MkHeaderCell.vue
index 17407b7c4e..227e532fc6 100644
--- a/packages/frontend/src/components/grid/MkHeaderCell.vue
+++ b/packages/frontend/src/components/grid/MkHeaderCell.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <th
 	ref="rootEl"
diff --git a/packages/frontend/src/components/grid/MkHeaderRow.vue b/packages/frontend/src/components/grid/MkHeaderRow.vue
index c7a6321370..ee1c2ef535 100644
--- a/packages/frontend/src/components/grid/MkHeaderRow.vue
+++ b/packages/frontend/src/components/grid/MkHeaderRow.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <tr :class="$style.header">
 	<MkNumberCell
diff --git a/packages/frontend/src/components/grid/MkNumberCell.vue b/packages/frontend/src/components/grid/MkNumberCell.vue
index 46a9037c13..c234391396 100644
--- a/packages/frontend/src/components/grid/MkNumberCell.vue
+++ b/packages/frontend/src/components/grid/MkNumberCell.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <th :class="[$style.cell]" tabindex="-1">
 	<div :class="[$style.root]">
diff --git a/packages/frontend/src/components/grid/cell-validators.ts b/packages/frontend/src/components/grid/cell-validators.ts
index d6d01a5513..f0f6af31fc 100644
--- a/packages/frontend/src/components/grid/cell-validators.ts
+++ b/packages/frontend/src/components/grid/cell-validators.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { CellValue, GridCell } from '@/components/grid/cell.js';
 import { GridColumn } from '@/components/grid/column.js';
 import { GridRow } from '@/components/grid/row.js';
diff --git a/packages/frontend/src/components/grid/cell.ts b/packages/frontend/src/components/grid/cell.ts
index e76ff98c19..cb003f0dfd 100644
--- a/packages/frontend/src/components/grid/cell.ts
+++ b/packages/frontend/src/components/grid/cell.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { ValidateViolation } from '@/components/grid/cell-validators.js';
 import { Size } from '@/components/grid/grid.js';
 import { GridColumn } from '@/components/grid/column.js';
diff --git a/packages/frontend/src/components/grid/column.ts b/packages/frontend/src/components/grid/column.ts
index 360cf77fe3..2f505756fe 100644
--- a/packages/frontend/src/components/grid/column.ts
+++ b/packages/frontend/src/components/grid/column.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { GridCellValidator } from '@/components/grid/cell-validators.js';
 import { Size, SizeStyle } from '@/components/grid/grid.js';
 import { calcCellWidth } from '@/components/grid/grid-utils.js';
diff --git a/packages/frontend/src/components/grid/grid-event.ts b/packages/frontend/src/components/grid/grid-event.ts
index 6623d8c83a..074b72b956 100644
--- a/packages/frontend/src/components/grid/grid-event.ts
+++ b/packages/frontend/src/components/grid/grid-event.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { CellAddress, CellValue, GridCell } from '@/components/grid/cell.js';
 import { GridState } from '@/components/grid/grid.js';
 import { ValidateViolation } from '@/components/grid/cell-validators.js';
diff --git a/packages/frontend/src/components/grid/grid-utils.ts b/packages/frontend/src/components/grid/grid-utils.ts
index 39198b7819..4a8c840c48 100644
--- a/packages/frontend/src/components/grid/grid-utils.ts
+++ b/packages/frontend/src/components/grid/grid-utils.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { isRef, Ref } from 'vue';
 import { DataSource, SizeStyle } from '@/components/grid/grid.js';
 import { CELL_ADDRESS_NONE, CellAddress, CellValue, GridCell } from '@/components/grid/cell.js';
diff --git a/packages/frontend/src/components/grid/grid.ts b/packages/frontend/src/components/grid/grid.ts
index 708984f330..0cb3b6f28b 100644
--- a/packages/frontend/src/components/grid/grid.ts
+++ b/packages/frontend/src/components/grid/grid.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { EventEmitter } from 'eventemitter3';
 import { CellValue, GridCellSetting } from '@/components/grid/cell.js';
 import { GridColumnSetting } from '@/components/grid/column.js';
diff --git a/packages/frontend/src/components/grid/row.ts b/packages/frontend/src/components/grid/row.ts
index 8d557c6cba..e0a317c9d3 100644
--- a/packages/frontend/src/components/grid/row.ts
+++ b/packages/frontend/src/components/grid/row.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { AdditionalStyle } from '@/components/grid/grid.js';
 import { GridCell } from '@/components/grid/cell.js';
 import { GridColumn } from '@/components/grid/column.js';
diff --git a/packages/frontend/src/pages/admin/custom-emojis-manager.impl.ts b/packages/frontend/src/pages/admin/custom-emojis-manager.impl.ts
index 3bf0404a97..eed6304990 100644
--- a/packages/frontend/src/pages/admin/custom-emojis-manager.impl.ts
+++ b/packages/frontend/src/pages/admin/custom-emojis-manager.impl.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export type RequestLogItem = {
 	failed: boolean;
 	url: string;
diff --git a/packages/frontend/src/pages/admin/custom-emojis-manager.local.list.vue b/packages/frontend/src/pages/admin/custom-emojis-manager.local.list.vue
index adc581e499..e884ee8f6f 100644
--- a/packages/frontend/src/pages/admin/custom-emojis-manager.local.list.vue
+++ b/packages/frontend/src/pages/admin/custom-emojis-manager.local.list.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <div>
 	<div v-if="gridItems.length === 0" style="text-align: center">
diff --git a/packages/frontend/src/pages/admin/custom-emojis-manager.local.register.vue b/packages/frontend/src/pages/admin/custom-emojis-manager.local.register.vue
index a8fb290737..424d04d561 100644
--- a/packages/frontend/src/pages/admin/custom-emojis-manager.local.register.vue
+++ b/packages/frontend/src/pages/admin/custom-emojis-manager.local.register.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <div class="_gaps">
 	<MkFolder>
diff --git a/packages/frontend/src/pages/admin/custom-emojis-manager.local.vue b/packages/frontend/src/pages/admin/custom-emojis-manager.local.vue
index 3af386a060..74330ba29a 100644
--- a/packages/frontend/src/pages/admin/custom-emojis-manager.local.vue
+++ b/packages/frontend/src/pages/admin/custom-emojis-manager.local.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <div class="_gaps" :class="$style.root">
 	<MkTab v-model="modeTab" style="margin-bottom: var(--margin);">
diff --git a/packages/frontend/src/pages/admin/custom-emojis-manager.logs-folder.vue b/packages/frontend/src/pages/admin/custom-emojis-manager.logs-folder.vue
index 29937c1687..f75f6c0da5 100644
--- a/packages/frontend/src/pages/admin/custom-emojis-manager.logs-folder.vue
+++ b/packages/frontend/src/pages/admin/custom-emojis-manager.logs-folder.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <MkFolder>
 	<template #icon><i class="ti ti-notes"></i></template>
diff --git a/packages/frontend/src/pages/admin/custom-emojis-manager.remote.vue b/packages/frontend/src/pages/admin/custom-emojis-manager.remote.vue
index da2b67d412..3fc3fe9d2d 100644
--- a/packages/frontend/src/pages/admin/custom-emojis-manager.remote.vue
+++ b/packages/frontend/src/pages/admin/custom-emojis-manager.remote.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <div :class="$style.root">
 	<div class="_gaps">
diff --git a/packages/frontend/src/pages/admin/custom-emojis-manager.sort-order-folder.vue b/packages/frontend/src/pages/admin/custom-emojis-manager.sort-order-folder.vue
index 2c6eb62307..3040bd151c 100644
--- a/packages/frontend/src/pages/admin/custom-emojis-manager.sort-order-folder.vue
+++ b/packages/frontend/src/pages/admin/custom-emojis-manager.sort-order-folder.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <MkFolder :spacerMax="8" :spacerMin="8">
 	<template #icon><i class="ti ti-arrows-sort"></i></template>
diff --git a/packages/frontend/src/pages/admin/custom-emojis-manager2.vue b/packages/frontend/src/pages/admin/custom-emojis-manager2.vue
index fc3ff1491e..86167c3792 100644
--- a/packages/frontend/src/pages/admin/custom-emojis-manager2.vue
+++ b/packages/frontend/src/pages/admin/custom-emojis-manager2.vue
@@ -1,3 +1,8 @@
+<!--
+SPDX-FileCopyrightText: syuilo and other misskey contributors
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
 <template>
 <div>
 	<MkStickyContainer>
diff --git a/packages/frontend/src/scripts/key-event.ts b/packages/frontend/src/scripts/key-event.ts
index d1f6aa8e3b..a72776d48c 100644
--- a/packages/frontend/src/scripts/key-event.ts
+++ b/packages/frontend/src/scripts/key-event.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 /**
  * {@link KeyboardEvent.code} の値を表す文字列。不足分は適宜追加する
  * @see https://developer.mozilla.org/en-US/docs/Web/API/UI_Events/Keyboard_event_code_values