Merge pull request #11874 from misskey-dev/develop

Release: 2023.9.0

58 files changed, 391 insertions, 18 deletions

diff --git a/packages/backend/src/misc/acct.ts b/packages/backend/src/misc/acct.ts
index fb3b657cf7..5db72746c0 100644
--- a/packages/backend/src/misc/acct.ts
+++ b/packages/backend/src/misc/acct.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export type Acct = {
 	username: string;
 	host: string | null;
diff --git a/packages/backend/src/misc/api-permissions.ts b/packages/backend/src/misc/api-permissions.ts
index 160cdf9fd6..57c9308844 100644
--- a/packages/backend/src/misc/api-permissions.ts
+++ b/packages/backend/src/misc/api-permissions.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export const kinds = [
 	'read:account',
 	'write:account',
diff --git a/packages/backend/src/misc/cache.ts b/packages/backend/src/misc/cache.ts
index e825d51371..c235871931 100644
--- a/packages/backend/src/misc/cache.ts
+++ b/packages/backend/src/misc/cache.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import * as Redis from 'ioredis';
 import { bindThis } from '@/decorators.js';
 
@@ -188,7 +193,7 @@ function nothingToDo<T, V = T>(value: T): V {
 export class MemoryKVCache<T, V = T> {
 	public cache: Map<string, { date: number; value: V; }>;
 	private lifetime: number;
-	private gcIntervalHandle: NodeJS.Timer;
+	private gcIntervalHandle: NodeJS.Timeout;
 	private toMapConverter: (value: T) => V;
 	private fromMapConverter: (cached: V) => T | undefined;
 
diff --git a/packages/backend/src/misc/check-https.ts b/packages/backend/src/misc/check-https.ts
index 612032fe97..0b13ccabdd 100644
--- a/packages/backend/src/misc/check-https.ts
+++ b/packages/backend/src/misc/check-https.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export function checkHttps(url: string): boolean {
 	return url.startsWith('https://') ||
 		(url.startsWith('http://') && process.env.NODE_ENV !== 'production');
diff --git a/packages/backend/src/misc/check-word-mute.ts b/packages/backend/src/misc/check-word-mute.ts
index 910bebfcfe..cef5595451 100644
--- a/packages/backend/src/misc/check-word-mute.ts
+++ b/packages/backend/src/misc/check-word-mute.ts
@@ -1,16 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { AhoCorasick } from 'slacc';
 import RE2 from 're2';
-import type { Note } from '@/models/entities/Note.js';
-import type { User } from '@/models/entities/User.js';
+import type { MiNote } from '@/models/Note.js';
+import type { MiUser } from '@/models/User.js';
 
 type NoteLike = {
-	userId: Note['userId'];
-	text: Note['text'];
-	cw?: Note['cw'];
+	userId: MiNote['userId'];
+	text: MiNote['text'];
+	cw?: MiNote['cw'];
 };
 
 type UserLike = {
-	id: User['id'];
+	id: MiUser['id'];
 };
 
 const acCache = new Map<string, AhoCorasick>();
diff --git a/packages/backend/src/misc/clone.ts b/packages/backend/src/misc/clone.ts
index 16fad24129..9d20deac3b 100644
--- a/packages/backend/src/misc/clone.ts
+++ b/packages/backend/src/misc/clone.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 // structredCloneが遅いため
 // SEE: http://var.blog.jp/archives/86038606.html
 
diff --git a/packages/backend/src/misc/content-disposition.ts b/packages/backend/src/misc/content-disposition.ts
index b2aec471d5..1ac8c88d21 100644
--- a/packages/backend/src/misc/content-disposition.ts
+++ b/packages/backend/src/misc/content-disposition.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import cd from 'content-disposition';
 
 export function contentDisposition(type: 'inline' | 'attachment', filename: string): string {
diff --git a/packages/backend/src/misc/correct-filename.ts b/packages/backend/src/misc/correct-filename.ts
index 23a0699f39..9130af44c3 100644
--- a/packages/backend/src/misc/correct-filename.ts
+++ b/packages/backend/src/misc/correct-filename.ts
@@ -1,15 +1,58 @@
-// 与えられた拡張子とファイル名が一致しているかどうかを確認し、
-// 一致していない場合は拡張子を付与して返す
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+/**
+ * Array.includes()よりSet.has()の方が高速
+ */
+const targetExtsToSkip = new Set([
+	'.gz',
+	'.tar',
+	'.tgz',
+	'.bz2',
+	'.xz',
+	'.zip',
+	'.7z',
+]);
+
+const extRegExp = /\.[0-9a-zA-Z]+$/i;
+
+/**
+ * 与えられた拡張子とファイル名が一致しているかどうかを確認し、
+ * 一致していない場合は拡張子を付与して返す
+ * 
+ * extはfile-typeのextを想定
+ */
 export function correctFilename(filename: string, ext: string | null) {
-	const dotExt = ext ? ext.startsWith('.') ? ext : `.${ext}` : '.unknown';
-	if (filename.endsWith(dotExt)) {
-		return filename;
-	}
-	if (ext === 'jpg' && filename.endsWith('.jpeg')) {
-		return filename;
+	const dotExt = ext ? ext[0] === '.' ? ext : `.${ext}` : '.unknown';
+
+	const match = extRegExp.exec(filename);
+	if (!match || !match[0]) {
+		// filenameが拡張子を持っていない場合は拡張子をつける
+		return `${filename}${dotExt}`;
 	}
-	if (ext === 'tif' && filename.endsWith('.tiff')) {
+
+	const filenameExt = match[0].toLowerCase();
+	if (
+		// 未知のファイル形式かつ拡張子がある場合は何もしない
+		ext === null ||
+		// 拡張子が一致している場合は何もしない
+		filenameExt === dotExt ||
+
+		// jpeg, tiffを同一視
+		dotExt === '.jpg' && filenameExt === '.jpeg' ||
+		dotExt === '.tif' && filenameExt === '.tiff' ||
+		// dllもexeもportable executableなので判定が正しく行われない
+		dotExt === '.exe' && filenameExt === '.dll' ||
+
+		// 圧縮形式っぽければ下手に拡張子を変えない
+		// https://github.com/misskey-dev/misskey/issues/11482
+		targetExtsToSkip.has(dotExt)
+	) {
 		return filename;
 	}
+
+	// 拡張子があるが一致していないなどの場合は拡張子を付け足す
 	return `${filename}${dotExt}`;
 }
diff --git a/packages/backend/src/misc/create-temp.ts b/packages/backend/src/misc/create-temp.ts
index 7b8942e308..2bb0e88489 100644
--- a/packages/backend/src/misc/create-temp.ts
+++ b/packages/backend/src/misc/create-temp.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import * as tmp from 'tmp';
 
 export function createTemp(): Promise<[string, () => void]> {
diff --git a/packages/backend/src/misc/dev-null.ts b/packages/backend/src/misc/dev-null.ts
index 6706af5e52..f510177c0b 100644
--- a/packages/backend/src/misc/dev-null.ts
+++ b/packages/backend/src/misc/dev-null.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { Writable, WritableOptions } from 'node:stream';
 
 export class DevNull extends Writable implements NodeJS.WritableStream {
diff --git a/packages/backend/src/misc/emoji-regex.ts b/packages/backend/src/misc/emoji-regex.ts
index 1c6f5776db..24e4092aeb 100644
--- a/packages/backend/src/misc/emoji-regex.ts
+++ b/packages/backend/src/misc/emoji-regex.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 // taken from twemoji-parser/dist/lib/regex.js
 const twemojiRegex = /(?:\ud83d\udc68\ud83c\udffb\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc68\ud83c\udffc\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc68\ud83c\udffd\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc68\ud83c\udffe\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc68\ud83c\udfff\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffb\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffb\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffc\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffc\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffd\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffd\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffe\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffe\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udfff\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udfff\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83e\uddd1\ud83c\udffb\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83e\uddd1\ud83c[\udffc-\udfff]|\ud83e\uddd1\ud83c\udffc\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83e\uddd1\ud83c[\udffb\udffd-\udfff]|\ud83e\uddd1\ud83c\udffd\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83e\uddd1\ud83c[\udffb\udffc\udffe\udfff]|\ud83e\uddd1\ud83c\udffe\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83e\uddd1\ud83c[\udffb-\udffd\udfff]|\ud83e\uddd1\ud83c\udfff\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83e\uddd1\ud83c[\udffb-\udffe]|\ud83d\udc68\ud83c\udffb\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc68\ud83c\udffb\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffc-\udfff]|\ud83d\udc68\ud83c\udffc\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc68\ud83c\udffc\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffb\udffd-\udfff]|\ud83d\udc68\ud83c\udffd\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc68\ud83c\udffd\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffb\udffc\udffe\udfff]|\ud83d\udc68\ud83c\udffe\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc68\ud83c\udffe\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffb-\udffd\udfff]|\ud83d\udc68\ud83c\udfff\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc68\ud83c\udfff\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffb-\udffe]|\ud83d\udc69\ud83c\udffb\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffb\u200d\u2764\ufe0f\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffb\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffc-\udfff]|\ud83d\udc69\ud83c\udffb\u200d\ud83e\udd1d\u200d\ud83d\udc69\ud83c[\udffc-\udfff]|\ud83d\udc69\ud83c\udffc\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffc\u200d\u2764\ufe0f\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffc\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffb\udffd-\udfff]|\ud83d\udc69\ud83c\udffc\u200d\ud83e\udd1d\u200d\ud83d\udc69\ud83c[\udffb\udffd-\udfff]|\ud83d\udc69\ud83c\udffd\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffd\u200d\u2764\ufe0f\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffd\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffb\udffc\udffe\udfff]|\ud83d\udc69\ud83c\udffd\u200d\ud83e\udd1d\u200d\ud83d\udc69\ud83c[\udffb\udffc\udffe\udfff]|\ud83d\udc69\ud83c\udffe\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffe\u200d\u2764\ufe0f\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udffe\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffb-\udffd\udfff]|\ud83d\udc69\ud83c\udffe\u200d\ud83e\udd1d\u200d\ud83d\udc69\ud83c[\udffb-\udffd\udfff]|\ud83d\udc69\ud83c\udfff\u200d\u2764\ufe0f\u200d\ud83d\udc68\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udfff\u200d\u2764\ufe0f\u200d\ud83d\udc69\ud83c[\udffb-\udfff]|\ud83d\udc69\ud83c\udfff\u200d\ud83e\udd1d\u200d\ud83d\udc68\ud83c[\udffb-\udffe]|\ud83d\udc69\ud83c\udfff\u200d\ud83e\udd1d\u200d\ud83d\udc69\ud83c[\udffb-\udffe]|\ud83e\uddd1\ud83c\udffb\u200d\u2764\ufe0f\u200d\ud83e\uddd1\ud83c[\udffc-\udfff]|\ud83e\uddd1\ud83c\udffb\u200d\ud83e\udd1d\u200d\ud83e\uddd1\ud83c[\udffb-\udfff]|\ud83e\uddd1\ud83c\udffc\u200d\u2764\ufe0f\u200d\ud83e\uddd1\ud83c[\udffb\udffd-\udfff]|\ud83e\uddd1\ud83c\udffc\u200d\ud83e\udd1d\u200d\ud83e\uddd1\ud83c[\udffb-\udfff]|\ud83e\uddd1\ud83c\udffd\u200d\u2764\ufe0f\u200d\ud83e\uddd1\ud83c[\udffb\udffc\udffe\udfff]|\ud83e\uddd1\ud83c\udffd\u200d\ud83e\udd1d\u200d\ud83e\uddd1\ud83c[\udffb-\udfff]|\ud83e\uddd1\ud83c\udffe\u200d\u2764\ufe0f\u200d\ud83e\uddd1\ud83c[\udffb-\udffd\udfff]|\ud83e\uddd1\ud83c\udffe\u200d\ud83e\udd1d\u200d\ud83e\uddd1\ud83c[\udffb-\udfff]|\ud83e\uddd1\ud83c\udfff\u200d\u2764\ufe0f\u200d\ud83e\uddd1\ud83c[\udffb-\udffe]|\ud83e\uddd1\ud83c\udfff\u200d\ud83e\udd1d\u200d\ud83e\uddd1\ud83c[\udffb-\udfff]|\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d[\udc68\udc69]|\ud83e\udef1\ud83c\udffb\u200d\ud83e\udef2\ud83c[\udffc-\udfff]|\ud83e\udef1\ud83c\udffc\u200d\ud83e\udef2\ud83c[\udffb\udffd-\udfff]|\ud83e\udef1\ud83c\udffd\u200d\ud83e\udef2\ud83c[\udffb\udffc\udffe\udfff]|\ud83e\udef1\ud83c\udffe\u200d\ud83e\udef2\ud83c[\udffb-\udffd\udfff]|\ud83e\udef1\ud83c\udfff\u200d\ud83e\udef2\ud83c[\udffb-\udffe]|\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc68|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d[\udc68\udc69]|\ud83e\uddd1\u200d\ud83e\udd1d\u200d\ud83e\uddd1|\ud83d\udc6b\ud83c[\udffb-\udfff]|\ud83d\udc6c\ud83c[\udffb-\udfff]|\ud83d\udc6d\ud83c[\udffb-\udfff]|\ud83d\udc8f\ud83c[\udffb-\udfff]|\ud83d\udc91\ud83c[\udffb-\udfff]|\ud83e\udd1d\ud83c[\udffb-\udfff]|\ud83d[\udc6b-\udc6d\udc8f\udc91]|\ud83e\udd1d)|(?:\ud83d[\udc68\udc69]|\ud83e\uddd1)(?:\ud83c[\udffb-\udfff])?\u200d(?:\u2695\ufe0f|\u2696\ufe0f|\u2708\ufe0f|\ud83c[\udf3e\udf73\udf7c\udf84\udf93\udfa4\udfa8\udfeb\udfed]|\ud83d[\udcbb\udcbc\udd27\udd2c\ude80\ude92]|\ud83e[\uddaf-\uddb3\uddbc\uddbd])|(?:\ud83c[\udfcb\udfcc]|\ud83d[\udd74\udd75]|\u26f9)((?:\ud83c[\udffb-\udfff]|\ufe0f)\u200d[\u2640\u2642]\ufe0f)|(?:\ud83c[\udfc3\udfc4\udfca]|\ud83d[\udc6e\udc70\udc71\udc73\udc77\udc81\udc82\udc86\udc87\ude45-\ude47\ude4b\ude4d\ude4e\udea3\udeb4-\udeb6]|\ud83e[\udd26\udd35\udd37-\udd39\udd3d\udd3e\uddb8\uddb9\uddcd-\uddcf\uddd4\uddd6-\udddd])(?:\ud83c[\udffb-\udfff])?\u200d[\u2640\u2642]\ufe0f|(?:\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83c\udff3\ufe0f\u200d\u26a7\ufe0f|\ud83c\udff3\ufe0f\u200d\ud83c\udf08|\ud83d\ude36\u200d\ud83c\udf2b\ufe0f|\u2764\ufe0f\u200d\ud83d\udd25|\u2764\ufe0f\u200d\ud83e\ude79|\ud83c\udff4\u200d\u2620\ufe0f|\ud83d\udc15\u200d\ud83e\uddba|\ud83d\udc3b\u200d\u2744\ufe0f|\ud83d\udc41\u200d\ud83d\udde8|\ud83d\udc68\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc6f\u200d\u2640\ufe0f|\ud83d\udc6f\u200d\u2642\ufe0f|\ud83d\ude2e\u200d\ud83d\udca8|\ud83d\ude35\u200d\ud83d\udcab|\ud83e\udd3c\u200d\u2640\ufe0f|\ud83e\udd3c\u200d\u2642\ufe0f|\ud83e\uddde\u200d\u2640\ufe0f|\ud83e\uddde\u200d\u2642\ufe0f|\ud83e\udddf\u200d\u2640\ufe0f|\ud83e\udddf\u200d\u2642\ufe0f|\ud83d\udc08\u200d\u2b1b)|[#*0-9]\ufe0f?\u20e3|(?:[©®\u2122\u265f]\ufe0f)|(?:\ud83c[\udc04\udd70\udd71\udd7e\udd7f\ude02\ude1a\ude2f\ude37\udf21\udf24-\udf2c\udf36\udf7d\udf96\udf97\udf99-\udf9b\udf9e\udf9f\udfcd\udfce\udfd4-\udfdf\udff3\udff5\udff7]|\ud83d[\udc3f\udc41\udcfd\udd49\udd4a\udd6f\udd70\udd73\udd76-\udd79\udd87\udd8a-\udd8d\udda5\udda8\uddb1\uddb2\uddbc\uddc2-\uddc4\uddd1-\uddd3\udddc-\uddde\udde1\udde3\udde8\uddef\uddf3\uddfa\udecb\udecd-\udecf\udee0-\udee5\udee9\udef0\udef3]|[\u203c\u2049\u2139\u2194-\u2199\u21a9\u21aa\u231a\u231b\u2328\u23cf\u23ed-\u23ef\u23f1\u23f2\u23f8-\u23fa\u24c2\u25aa\u25ab\u25b6\u25c0\u25fb-\u25fe\u2600-\u2604\u260e\u2611\u2614\u2615\u2618\u2620\u2622\u2623\u2626\u262a\u262e\u262f\u2638-\u263a\u2640\u2642\u2648-\u2653\u2660\u2663\u2665\u2666\u2668\u267b\u267f\u2692-\u2697\u2699\u269b\u269c\u26a0\u26a1\u26a7\u26aa\u26ab\u26b0\u26b1\u26bd\u26be\u26c4\u26c5\u26c8\u26cf\u26d1\u26d3\u26d4\u26e9\u26ea\u26f0-\u26f5\u26f8\u26fa\u26fd\u2702\u2708\u2709\u270f\u2712\u2714\u2716\u271d\u2721\u2733\u2734\u2744\u2747\u2757\u2763\u2764\u27a1\u2934\u2935\u2b05-\u2b07\u2b1b\u2b1c\u2b50\u2b55\u3030\u303d\u3297\u3299])(?:\ufe0f|(?!\ufe0e))|(?:(?:\ud83c[\udfcb\udfcc]|\ud83d[\udd74\udd75\udd90]|[\u261d\u26f7\u26f9\u270c\u270d])(?:\ufe0f|(?!\ufe0e))|(?:\ud83c[\udf85\udfc2-\udfc4\udfc7\udfca]|\ud83d[\udc42\udc43\udc46-\udc50\udc66-\udc69\udc6e\udc70-\udc78\udc7c\udc81-\udc83\udc85-\udc87\udcaa\udd7a\udd95\udd96\ude45-\ude47\ude4b-\ude4f\udea3\udeb4-\udeb6\udec0\udecc]|\ud83e[\udd0c\udd0f\udd18-\udd1c\udd1e\udd1f\udd26\udd30-\udd39\udd3d\udd3e\udd77\uddb5\uddb6\uddb8\uddb9\uddbb\uddcd-\uddcf\uddd1-\udddd\udec3-\udec5\udef0-\udef6]|[\u270a\u270b]))(?:\ud83c[\udffb-\udfff])?|(?:\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc65\udb40\udc6e\udb40\udc67\udb40\udc7f|\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc73\udb40\udc63\udb40\udc74\udb40\udc7f|\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc77\udb40\udc6c\udb40\udc73\udb40\udc7f|\ud83c\udde6\ud83c[\udde8-\uddec\uddee\uddf1\uddf2\uddf4\uddf6-\uddfa\uddfc\uddfd\uddff]|\ud83c\udde7\ud83c[\udde6\udde7\udde9-\uddef\uddf1-\uddf4\uddf6-\uddf9\uddfb\uddfc\uddfe\uddff]|\ud83c\udde8\ud83c[\udde6\udde8\udde9\uddeb-\uddee\uddf0-\uddf5\uddf7\uddfa-\uddff]|\ud83c\udde9\ud83c[\uddea\uddec\uddef\uddf0\uddf2\uddf4\uddff]|\ud83c\uddea\ud83c[\udde6\udde8\uddea\uddec\udded\uddf7-\uddfa]|\ud83c\uddeb\ud83c[\uddee-\uddf0\uddf2\uddf4\uddf7]|\ud83c\uddec\ud83c[\udde6\udde7\udde9-\uddee\uddf1-\uddf3\uddf5-\uddfa\uddfc\uddfe]|\ud83c\udded\ud83c[\uddf0\uddf2\uddf3\uddf7\uddf9\uddfa]|\ud83c\uddee\ud83c[\udde8-\uddea\uddf1-\uddf4\uddf6-\uddf9]|\ud83c\uddef\ud83c[\uddea\uddf2\uddf4\uddf5]|\ud83c\uddf0\ud83c[\uddea\uddec-\uddee\uddf2\uddf3\uddf5\uddf7\uddfc\uddfe\uddff]|\ud83c\uddf1\ud83c[\udde6-\udde8\uddee\uddf0\uddf7-\uddfb\uddfe]|\ud83c\uddf2\ud83c[\udde6\udde8-\udded\uddf0-\uddff]|\ud83c\uddf3\ud83c[\udde6\udde8\uddea-\uddec\uddee\uddf1\uddf4\uddf5\uddf7\uddfa\uddff]|\ud83c\uddf4\ud83c\uddf2|\ud83c\uddf5\ud83c[\udde6\uddea-\udded\uddf0-\uddf3\uddf7-\uddf9\uddfc\uddfe]|\ud83c\uddf6\ud83c\udde6|\ud83c\uddf7\ud83c[\uddea\uddf4\uddf8\uddfa\uddfc]|\ud83c\uddf8\ud83c[\udde6-\uddea\uddec-\uddf4\uddf7-\uddf9\uddfb\uddfd-\uddff]|\ud83c\uddf9\ud83c[\udde6\udde8\udde9\uddeb-\udded\uddef-\uddf4\uddf7\uddf9\uddfb\uddfc\uddff]|\ud83c\uddfa\ud83c[\udde6\uddec\uddf2\uddf3\uddf8\uddfe\uddff]|\ud83c\uddfb\ud83c[\udde6\udde8\uddea\uddec\uddee\uddf3\uddfa]|\ud83c\uddfc\ud83c[\uddeb\uddf8]|\ud83c\uddfd\ud83c\uddf0|\ud83c\uddfe\ud83c[\uddea\uddf9]|\ud83c\uddff\ud83c[\udde6\uddf2\uddfc]|\ud83c[\udccf\udd8e\udd91-\udd9a\udde6-\uddff\ude01\ude32-\ude36\ude38-\ude3a\ude50\ude51\udf00-\udf20\udf2d-\udf35\udf37-\udf7c\udf7e-\udf84\udf86-\udf93\udfa0-\udfc1\udfc5\udfc6\udfc8\udfc9\udfcf-\udfd3\udfe0-\udff0\udff4\udff8-\udfff]|\ud83d[\udc00-\udc3e\udc40\udc44\udc45\udc51-\udc65\udc6a\udc6f\udc79-\udc7b\udc7d-\udc80\udc84\udc88-\udc8e\udc90\udc92-\udca9\udcab-\udcfc\udcff-\udd3d\udd4b-\udd4e\udd50-\udd67\udda4\uddfb-\ude44\ude48-\ude4a\ude80-\udea2\udea4-\udeb3\udeb7-\udebf\udec1-\udec5\uded0-\uded2\uded5-\uded7\udedd-\udedf\udeeb\udeec\udef4-\udefc\udfe0-\udfeb\udff0]|\ud83e[\udd0d\udd0e\udd10-\udd17\udd20-\udd25\udd27-\udd2f\udd3a\udd3c\udd3f-\udd45\udd47-\udd76\udd78-\uddb4\uddb7\uddba\uddbc-\uddcc\uddd0\uddde-\uddff\ude70-\ude74\ude78-\ude7c\ude80-\ude86\ude90-\udeac\udeb0-\udeba\udec0-\udec2\uded0-\uded9\udee0-\udee7]|[\u23e9-\u23ec\u23f0\u23f3\u267e\u26ce\u2705\u2728\u274c\u274e\u2753-\u2755\u2795-\u2797\u27b0\u27bf\ue50a])|\ufe0f/g;
 
diff --git a/packages/backend/src/misc/extract-custom-emojis-from-mfm.ts b/packages/backend/src/misc/extract-custom-emojis-from-mfm.ts
index 14c25922ad..0b898d47e8 100644
--- a/packages/backend/src/misc/extract-custom-emojis-from-mfm.ts
+++ b/packages/backend/src/misc/extract-custom-emojis-from-mfm.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import * as mfm from 'mfm-js';
 import { unique } from '@/misc/prelude/array.js';
 
diff --git a/packages/backend/src/misc/extract-hashtags.ts b/packages/backend/src/misc/extract-hashtags.ts
index d293fd7f52..3bd56e98eb 100644
--- a/packages/backend/src/misc/extract-hashtags.ts
+++ b/packages/backend/src/misc/extract-hashtags.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import * as mfm from 'mfm-js';
 import { unique } from '@/misc/prelude/array.js';
 
diff --git a/packages/backend/src/misc/extract-mentions.ts b/packages/backend/src/misc/extract-mentions.ts
index c8762e797b..272eb92192 100644
--- a/packages/backend/src/misc/extract-mentions.ts
+++ b/packages/backend/src/misc/extract-mentions.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 // test is located in test/extract-mentions
 
 import * as mfm from 'mfm-js';
diff --git a/packages/backend/src/misc/fastify-reply-error.ts b/packages/backend/src/misc/fastify-reply-error.ts
index 4e987175e2..7c889bab7a 100644
--- a/packages/backend/src/misc/fastify-reply-error.ts
+++ b/packages/backend/src/misc/fastify-reply-error.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 // https://www.fastify.io/docs/latest/Reference/Reply/#async-await-and-promises
 export class FastifyReplyError extends Error {
 	public message: string;
diff --git a/packages/backend/src/misc/gen-identicon.ts b/packages/backend/src/misc/gen-identicon.ts
index b40745973e..c36b00af63 100644
--- a/packages/backend/src/misc/gen-identicon.ts
+++ b/packages/backend/src/misc/gen-identicon.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 /**
  * Identicon generator
  * https://en.wikipedia.org/wiki/Identicon
diff --git a/packages/backend/src/misc/gen-key-pair.ts b/packages/backend/src/misc/gen-key-pair.ts
index e2ad598501..c0815613e7 100644
--- a/packages/backend/src/misc/gen-key-pair.ts
+++ b/packages/backend/src/misc/gen-key-pair.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import * as crypto from 'node:crypto';
 import * as util from 'node:util';
 
diff --git a/packages/backend/src/misc/generate-invite-code.ts b/packages/backend/src/misc/generate-invite-code.ts
index 617b27361d..7c88561179 100644
--- a/packages/backend/src/misc/generate-invite-code.ts
+++ b/packages/backend/src/misc/generate-invite-code.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { secureRndstr } from './secure-rndstr.js';
 
 const CHARS = '23456789ABCDEFGHJKLMNPQRSTUVWXYZ'; // [0-9A-Z] w/o [01IO] (32 patterns)
diff --git a/packages/backend/src/misc/generate-native-user-token.ts b/packages/backend/src/misc/generate-native-user-token.ts
index 7292d765a8..094c625120 100644
--- a/packages/backend/src/misc/generate-native-user-token.ts
+++ b/packages/backend/src/misc/generate-native-user-token.ts
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { secureRndstr } from '@/misc/secure-rndstr.js';
 
+// eslint-disable-next-line import/no-default-export
 export default () => secureRndstr(16);
diff --git a/packages/backend/src/misc/get-ip-hash.ts b/packages/backend/src/misc/get-ip-hash.ts
index 1a86fb8814..3a01e4f578 100644
--- a/packages/backend/src/misc/get-ip-hash.ts
+++ b/packages/backend/src/misc/get-ip-hash.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import IPCIDR from 'ip-cidr';
 
 export function getIpHash(ip: string): string {
diff --git a/packages/backend/src/misc/get-note-summary.ts b/packages/backend/src/misc/get-note-summary.ts
index 964f20b25b..1bda5cdcf7 100644
--- a/packages/backend/src/misc/get-note-summary.ts
+++ b/packages/backend/src/misc/get-note-summary.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import type { Packed } from './json-schema.js';
 
 /**
diff --git a/packages/backend/src/misc/get-reaction-emoji.ts b/packages/backend/src/misc/get-reaction-emoji.ts
index c2e0b98582..80ef7ff7bc 100644
--- a/packages/backend/src/misc/get-reaction-emoji.ts
+++ b/packages/backend/src/misc/get-reaction-emoji.ts
@@ -1,3 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+// eslint-disable-next-line import/no-default-export
 export default function(reaction: string): string {
 	switch (reaction) {
 		case 'like': return '👍';
diff --git a/packages/backend/src/misc/i18n.ts b/packages/backend/src/misc/i18n.ts
index b1c727827d..4c9d1a08e3 100644
--- a/packages/backend/src/misc/i18n.ts
+++ b/packages/backend/src/misc/i18n.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export class I18n<T extends Record<string, any>> {
 	public locale: T;
 
diff --git a/packages/backend/src/misc/id/aid.ts b/packages/backend/src/misc/id/aid.ts
index f0cbc9900d..ec8aa849c9 100644
--- a/packages/backend/src/misc/id/aid.ts
+++ b/packages/backend/src/misc/id/aid.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 // AID
 // 長さ8の[2000年1月1日からの経過ミリ秒をbase36でエンコードしたもの] + 長さ2の[ノイズ文字列]
 
diff --git a/packages/backend/src/misc/id/aidx.ts b/packages/backend/src/misc/id/aidx.ts
new file mode 100644
index 0000000000..5b031ea4c0
--- /dev/null
+++ b/packages/backend/src/misc/id/aidx.ts
@@ -0,0 +1,44 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+// AIDX
+// 長さ8の[2000年1月1日からの経過ミリ秒をbase36でエンコードしたもの] + 長さ4の[個体ID] + 長さ4の[カウンタ]
+// (c) mei23
+// https://misskey.m544.net/notes/71899acdcc9859ec5708ac24
+
+import { customAlphabet } from 'nanoid';
+
+export const aidxRegExp = /^[0-9a-z]{16}$/;
+
+const TIME2000 = 946684800000;
+const TIME_LENGTH = 8;
+const NODE_LENGTH = 4;
+const NOISE_LENGTH = 4;
+
+const nodeId = customAlphabet('0123456789abcdefghijklmnopqrstuvwxyz', NODE_LENGTH)();
+let counter = 0;
+
+function getTime(time: number): string {
+	time = time - TIME2000;
+	if (time < 0) time = 0;
+
+	return time.toString(36).padStart(TIME_LENGTH, '0').slice(-TIME_LENGTH);
+}
+
+function getNoise(): string {
+	return counter.toString(36).padStart(NOISE_LENGTH, '0').slice(-NOISE_LENGTH);
+}
+
+export function genAidx(date: Date): string {
+	const t = date.getTime();
+	if (isNaN(t)) throw new Error('Failed to create AIDX: Invalid Date');
+	counter++;
+	return getTime(t) + nodeId + getNoise();
+}
+
+export function parseAidx(id: string): { date: Date; } {
+	const time = parseInt(id.slice(0, TIME_LENGTH), 36) + TIME2000;
+	return { date: new Date(time) };
+}
diff --git a/packages/backend/src/misc/id/meid.ts b/packages/backend/src/misc/id/meid.ts
index 337416b059..82cda37237 100644
--- a/packages/backend/src/misc/id/meid.ts
+++ b/packages/backend/src/misc/id/meid.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 const CHARS = '0123456789abcdef';
 
 // same as object-id
diff --git a/packages/backend/src/misc/id/meidg.ts b/packages/backend/src/misc/id/meidg.ts
index 19d0bc1fd2..fba7156718 100644
--- a/packages/backend/src/misc/id/meidg.ts
+++ b/packages/backend/src/misc/id/meidg.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 const CHARS = '0123456789abcdef';
 
 //  4bit Fixed hex value 'g'
diff --git a/packages/backend/src/misc/id/object-id.ts b/packages/backend/src/misc/id/object-id.ts
index aec3447bd7..e3b6e8e433 100644
--- a/packages/backend/src/misc/id/object-id.ts
+++ b/packages/backend/src/misc/id/object-id.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 const CHARS = '0123456789abcdef';
 
 // same as meid
diff --git a/packages/backend/src/misc/id/ulid.ts b/packages/backend/src/misc/id/ulid.ts
index bfbc363cf5..00dd67dafe 100644
--- a/packages/backend/src/misc/id/ulid.ts
+++ b/packages/backend/src/misc/id/ulid.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 // Crockford's Base32
 // https://github.com/ulid/spec#encoding
 const CHARS = '0123456789ABCDEFGHJKMNPQRSTVWXYZ';
diff --git a/packages/backend/src/misc/identifiable-error.ts b/packages/backend/src/misc/identifiable-error.ts
index e394123f1b..71a4773fac 100644
--- a/packages/backend/src/misc/identifiable-error.ts
+++ b/packages/backend/src/misc/identifiable-error.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 /**
  * ID付きエラー
  */
diff --git a/packages/backend/src/misc/is-duplicate-key-value-error.ts b/packages/backend/src/misc/is-duplicate-key-value-error.ts
index f5343d187c..91e0a6b93d 100644
--- a/packages/backend/src/misc/is-duplicate-key-value-error.ts
+++ b/packages/backend/src/misc/is-duplicate-key-value-error.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { QueryFailedError } from 'typeorm';
 
 export function isDuplicateKeyValueError(e: unknown | Error): boolean {
diff --git a/packages/backend/src/misc/is-instance-muted.ts b/packages/backend/src/misc/is-instance-muted.ts
index 73ad0b3b82..b231058a95 100644
--- a/packages/backend/src/misc/is-instance-muted.ts
+++ b/packages/backend/src/misc/is-instance-muted.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import type { Packed } from './json-schema.js';
 
 export function isInstanceMuted(note: Packed<'Note'>, mutedInstances: Set<string>): boolean {
diff --git a/packages/backend/src/misc/is-mime-image.ts b/packages/backend/src/misc/is-mime-image.ts
index 46a66efc0f..1a5a8cf0f4 100644
--- a/packages/backend/src/misc/is-mime-image.ts
+++ b/packages/backend/src/misc/is-mime-image.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { FILE_TYPE_BROWSERSAFE } from '@/const.js';
 
 const dictionary = {
diff --git a/packages/backend/src/misc/is-native-token.ts b/packages/backend/src/misc/is-native-token.ts
index 2833c570c8..618e60b7d8 100644
--- a/packages/backend/src/misc/is-native-token.ts
+++ b/packages/backend/src/misc/is-native-token.ts
@@ -1 +1,7 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+// eslint-disable-next-line import/no-default-export
 export default (token: string) => token.length === 16;
diff --git a/packages/backend/src/misc/is-not-null.ts b/packages/backend/src/misc/is-not-null.ts
index d89a1957be..153a9e51ef 100644
--- a/packages/backend/src/misc/is-not-null.ts
+++ b/packages/backend/src/misc/is-not-null.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 // we are using {} as "any non-nullish value" as expected
 // eslint-disable-next-line @typescript-eslint/ban-types
 export function isNotNull<T extends {}>(input: T | undefined | null): input is T {
diff --git a/packages/backend/src/misc/is-quote.ts b/packages/backend/src/misc/is-quote.ts
index 248b25a0bf..059f6a4b5f 100644
--- a/packages/backend/src/misc/is-quote.ts
+++ b/packages/backend/src/misc/is-quote.ts
@@ -1,5 +1,11 @@
-import type { Note } from '@/models/entities/Note.js';
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
 
-export default function(note: Note): boolean {
+import type { MiNote } from '@/models/Note.js';
+
+// eslint-disable-next-line import/no-default-export
+export default function(note: MiNote): boolean {
 	return note.renoteId != null && (note.text != null || note.hasPoll || (note.fileIds != null && note.fileIds.length > 0));
 }
diff --git a/packages/backend/src/misc/is-user-related.ts b/packages/backend/src/misc/is-user-related.ts
index e6bbdb5d35..edd65a3c1c 100644
--- a/packages/backend/src/misc/is-user-related.ts
+++ b/packages/backend/src/misc/is-user-related.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export function isUserRelated(note: any, userIds: Set<string>): boolean {
 	if (userIds.has(note.userId)) {
 		return true;
diff --git a/packages/backend/src/misc/json-schema.ts b/packages/backend/src/misc/json-schema.ts
index ec6bc4a5fb..80c1041c62 100644
--- a/packages/backend/src/misc/json-schema.ts
+++ b/packages/backend/src/misc/json-schema.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import {
 	packedUserLiteSchema,
 	packedUserDetailedNotMeOnlySchema,
@@ -30,6 +35,7 @@ import { packedQueueCountSchema } from '@/models/json-schema/queue.js';
 import { packedGalleryPostSchema } from '@/models/json-schema/gallery-post.js';
 import { packedEmojiDetailedSchema, packedEmojiSimpleSchema } from '@/models/json-schema/emoji.js';
 import { packedFlashSchema } from '@/models/json-schema/flash.js';
+import { packedAnnouncementSchema } from '@/models/json-schema/announcement.js';
 
 export const refs = {
 	UserLite: packedUserLiteSchema,
@@ -41,6 +47,7 @@ export const refs = {
 	User: packedUserSchema,
 
 	UserList: packedUserListSchema,
+	Announcement: packedAnnouncementSchema,
 	App: packedAppSchema,
 	Note: packedNoteSchema,
 	NoteReaction: packedNoteReactionSchema,
diff --git a/packages/backend/src/misc/langmap.ts b/packages/backend/src/misc/langmap.ts
index 5ee85e6c09..9e287677df 100644
--- a/packages/backend/src/misc/langmap.ts
+++ b/packages/backend/src/misc/langmap.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 // TODO: sharedに置いてフロントエンドのと統合したい
 export const langmap = {
 	'ach': {
diff --git a/packages/backend/src/misc/normalize-for-search.ts b/packages/backend/src/misc/normalize-for-search.ts
index 200540566e..9d96f4169d 100644
--- a/packages/backend/src/misc/normalize-for-search.ts
+++ b/packages/backend/src/misc/normalize-for-search.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export function normalizeForSearch(tag: string): string {
 	// ref.
 	// - https://analytics-note.xyz/programming/unicode-normalization-forms/
diff --git a/packages/backend/src/misc/nyaize.ts b/packages/backend/src/misc/nyaize.ts
index 350f8d2172..0ac77e1006 100644
--- a/packages/backend/src/misc/nyaize.ts
+++ b/packages/backend/src/misc/nyaize.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export function nyaize(text: string): string {
 	return text
 		// ja-JP
diff --git a/packages/backend/src/misc/prelude/array.ts b/packages/backend/src/misc/prelude/array.ts
index 2524eacfb3..b2f29bcecf 100644
--- a/packages/backend/src/misc/prelude/array.ts
+++ b/packages/backend/src/misc/prelude/array.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { EndoRelation, Predicate } from './relation.js';
 
 /**
diff --git a/packages/backend/src/misc/prelude/await-all.ts b/packages/backend/src/misc/prelude/await-all.ts
index fd9832d6f8..6b8a91f8a5 100644
--- a/packages/backend/src/misc/prelude/await-all.ts
+++ b/packages/backend/src/misc/prelude/await-all.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export type Promiseable<T> = {
 	[K in keyof T]: Promise<T[K]> | T[K];
 };
diff --git a/packages/backend/src/misc/prelude/math.ts b/packages/backend/src/misc/prelude/math.ts
index 07b94bec30..87b5017d09 100644
--- a/packages/backend/src/misc/prelude/math.ts
+++ b/packages/backend/src/misc/prelude/math.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export function gcd(a: number, b: number): number {
 	return b === 0 ? a : gcd(b, a % b);
 }
diff --git a/packages/backend/src/misc/prelude/maybe.ts b/packages/backend/src/misc/prelude/maybe.ts
index df7c4ed52a..17c100b80d 100644
--- a/packages/backend/src/misc/prelude/maybe.ts
+++ b/packages/backend/src/misc/prelude/maybe.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export interface IMaybe<T> {
 	isJust(): this is IJust<T>;
 }
diff --git a/packages/backend/src/misc/prelude/relation.ts b/packages/backend/src/misc/prelude/relation.ts
index 1f4703f52f..3456c1a0bc 100644
--- a/packages/backend/src/misc/prelude/relation.ts
+++ b/packages/backend/src/misc/prelude/relation.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export type Predicate<T> = (a: T) => boolean;
 
 export type Relation<T, U> = (a: T, b: U) => boolean;
diff --git a/packages/backend/src/misc/prelude/string.ts b/packages/backend/src/misc/prelude/string.ts
index b907e0a2e1..a727ab7f1d 100644
--- a/packages/backend/src/misc/prelude/string.ts
+++ b/packages/backend/src/misc/prelude/string.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export function concat(xs: string[]): string {
 	return xs.join('');
 }
diff --git a/packages/backend/src/misc/prelude/symbol.ts b/packages/backend/src/misc/prelude/symbol.ts
index 51e12f7450..91c058a845 100644
--- a/packages/backend/src/misc/prelude/symbol.ts
+++ b/packages/backend/src/misc/prelude/symbol.ts
@@ -1 +1,6 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export const fallback = Symbol('fallback');
diff --git a/packages/backend/src/misc/prelude/time.ts b/packages/backend/src/misc/prelude/time.ts
index b21978b186..4479db1081 100644
--- a/packages/backend/src/misc/prelude/time.ts
+++ b/packages/backend/src/misc/prelude/time.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 const dateTimeIntervals = {
 	'day': 86400000,
 	'hour': 3600000,
diff --git a/packages/backend/src/misc/prelude/url.ts b/packages/backend/src/misc/prelude/url.ts
index 5239678280..633eb98218 100644
--- a/packages/backend/src/misc/prelude/url.ts
+++ b/packages/backend/src/misc/prelude/url.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 /* objを検査して
  * 1. 配列に何も入っていない時はクエリを付けない
  * 2. プロパティがundefinedの時はクエリを付けない
diff --git a/packages/backend/src/misc/prelude/xml.ts b/packages/backend/src/misc/prelude/xml.ts
index b4469a1d8d..bca116a7ec 100644
--- a/packages/backend/src/misc/prelude/xml.ts
+++ b/packages/backend/src/misc/prelude/xml.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 const map: Record<string, string> = {
 	'&': '&amp;',
 	'<': '&lt;',
diff --git a/packages/backend/src/misc/reset-db.ts b/packages/backend/src/misc/reset-db.ts
index 835cd2ba28..a571460a59 100644
--- a/packages/backend/src/misc/reset-db.ts
+++ b/packages/backend/src/misc/reset-db.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import type { DataSource } from 'typeorm';
 
 export async function resetDb(db: DataSource) {
diff --git a/packages/backend/src/misc/safe-for-sql.ts b/packages/backend/src/misc/safe-for-sql.ts
index 02eb7f0a26..d7bdd0a81c 100644
--- a/packages/backend/src/misc/safe-for-sql.ts
+++ b/packages/backend/src/misc/safe-for-sql.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export function safeForSql(text: string): boolean {
 	return !/[\0\x08\x09\x1a\n\r"'\\\%]/g.test(text);
 }
diff --git a/packages/backend/src/misc/secure-rndstr.ts b/packages/backend/src/misc/secure-rndstr.ts
index cde64c8142..01368d808a 100644
--- a/packages/backend/src/misc/secure-rndstr.ts
+++ b/packages/backend/src/misc/secure-rndstr.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import * as crypto from 'node:crypto';
 
 export const L_CHARS = '0123456789abcdefghijklmnopqrstuvwxyz';
diff --git a/packages/backend/src/misc/show-machine-info.ts b/packages/backend/src/misc/show-machine-info.ts
index fa5a53e313..ed0fa651f1 100644
--- a/packages/backend/src/misc/show-machine-info.ts
+++ b/packages/backend/src/misc/show-machine-info.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import * as os from 'node:os';
 import sysUtils from 'systeminformation';
 import type Logger from '@/logger.js';
diff --git a/packages/backend/src/misc/sql-like-escape.ts b/packages/backend/src/misc/sql-like-escape.ts
index 8470dca3de..85cc7405e1 100644
--- a/packages/backend/src/misc/sql-like-escape.ts
+++ b/packages/backend/src/misc/sql-like-escape.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export function sqlLikeEscape(s: string) {
 	return s.replace(/([%_])/g, '\\$1');
 }
diff --git a/packages/backend/src/misc/status-error.ts b/packages/backend/src/misc/status-error.ts
index 0a33f8acaf..4285685d24 100644
--- a/packages/backend/src/misc/status-error.ts
+++ b/packages/backend/src/misc/status-error.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export class StatusError extends Error {
 	public statusCode: number;
 	public statusMessage?: string;
diff --git a/packages/backend/src/misc/truncate.ts b/packages/backend/src/misc/truncate.ts
index cb120331a1..b65202fbd4 100644
--- a/packages/backend/src/misc/truncate.ts
+++ b/packages/backend/src/misc/truncate.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { substring } from 'stringz';
 
 export function truncate(input: string, size: number): string;