feat: ノートの下書き(draft of note) (#15298)

* WIp (backend)

* Remove unused

* 下書きbackend 続き

* fix(backedn): visibilityが下書きに反映されない

* Update packages/backend/src/postgres.ts

Co-authored-by: かっこかり <67428053+kakkokari-gtyih@users.noreply.github.com>

* Fix : import order

* fix(backend) : createでcwが効かない

* FIX FOREGIN KEY

* wip: frontend（既存の下書きを挿入）

まだ：チャンネル表示、下書きの作成、削除

* WIP: ノート選択ダイアログ
投稿時に下書きを削除

* Promiseに変更

* 連合なし、チャンネルも表示

* Hashtagの値抜け漏れ

* hasthagを0文字でも作成可能に

* 下書きの保存機構

* chore(misskey-js): build types

* localOnly抜け漏れ

* チャンネル情報の書き換え

* enhance(frontend): ヘッダ部の表示改善

* fix(frontend): ファイル添付できない

* fix: no file

* fix(frontend): 投票が反映されない

* ハッシュタグの展開（コメントアウト外し忘れ）

* fix: visibleUserIdsが反映されない

* enhance: APIの型を整備

* refactor: 型が整備できたのでasを削除

* Add userhost

* fix

* enhance: paginationを使う

* fix

* fix: 自分のアカウントでの投稿でしか下書きを利用できないように

完全に塞ぐことはできないが一応

* :art:

* APIのエラーIDを追加

* enhance: スタイル調整

* remove unused code

* :art:

* fix: ロールポリシーの型

* ロールの編集画面

* ダイアログの挙動改善

* 下書き機能が利用できない場合は表示しないように

* refactor

* fix: ダブルクリックが効かない問題を修正

* add comments

* fix

* fix: 保存時のエラーの種別にかかわらずmodalを閉じないように

* fix()backend: NoteDraftのreply, renoteの型が間違ってたので修正 (migtrationはあってた)

* fix: 投稿フォームを空白にして通常リノートできるやつは下書きとしては弾くように

* fix(backend): テキストが0文字でも下書きは保存できるように

* Fix(backend): replyIdの型定義がミスっているのを修正

* chore(misskey-js): update types

* Add CHANGELOG

* lint

* 常にサーバー下書きに保存し、上限を超えた場合のみ尋ねるように

* NoteDraftServiceにcreate, updateの処理を移譲

* Fix typeerror

* remove tooltip

* Remove Mkbutton:short and use iconOnly

* 不要なコメントの削除

* Remove Short Completely

* wip

* escキーまわりの挙動を改善

* 下書き選択時に下書き可能数と現在の量が分かるように

* cleanUp

* wip

* wi

* wip

* Update MkPostForm.vue

---------

Co-authored-by: かっこかり <67428053+kakkokari-gtyih@users.noreply.github.com>
Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

34 files changed, 2766 insertions, 56 deletions

diff --git a/packages/backend/migration/1736686850345-createNoteDraft.js b/packages/backend/migration/1736686850345-createNoteDraft.js
new file mode 100644
index 0000000000..3b525a7339
--- /dev/null
+++ b/packages/backend/migration/1736686850345-createNoteDraft.js
@@ -0,0 +1,91 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class CreateNoteDraft1736686850345 {
+    name = 'CreateNoteDraft1736686850345'
+
+    async up(queryRunner) {
+			await queryRunner.query(`
+				CREATE TABLE "note_draft" (
+					"id" varchar NOT NULL,
+					"replyId" varchar NULL,
+					"renoteId" varchar NULL,
+					"text" text NULL,
+					"cw" varchar(512) NULL,
+					"userId" varchar NOT NULL,
+					"localOnly" boolean DEFAULT false,
+					"reactionAcceptance" varchar(64) NULL,
+					"visibility" varchar NOT NULL,
+					"fileIds" varchar[] DEFAULT '{}',
+					"visibleUserIds" varchar[] DEFAULT '{}',
+					"hashtag" varchar(128) NULL,
+					"channelId" varchar NULL,
+					"hasPoll" boolean DEFAULT false,
+					"pollChoices" varchar(256)[] DEFAULT '{}',
+					"pollMultiple" boolean NULL,
+					"pollExpiresAt" TIMESTAMP WITH TIME ZONE NULL,
+					"pollExpiredAfter" bigint NULL,
+					PRIMARY KEY ("id")
+				)`);
+
+			await queryRunner.query(`
+				CREATE INDEX "IDX_NOTE_DRAFT_REPLY_ID" ON "note_draft" ("replyId")
+			`);
+
+			await queryRunner.query(`
+				CREATE INDEX "IDX_NOTE_DRAFT_RENOTE_ID" ON "note_draft" ("renoteId")
+			`);
+
+			await queryRunner.query(`
+				CREATE INDEX "IDX_NOTE_DRAFT_USER_ID" ON "note_draft" ("userId")
+			`);
+
+			await queryRunner.query(`
+				CREATE INDEX "IDX_NOTE_DRAFT_FILE_IDS" ON "note_draft" USING GIN ("fileIds")
+			`);
+
+			await queryRunner.query(`
+				CREATE INDEX "IDX_NOTE_DRAFT_VISIBLE_USER_IDS" ON "note_draft" USING GIN ("visibleUserIds")
+			`);
+
+			await queryRunner.query(`
+				CREATE INDEX "IDX_NOTE_DRAFT_CHANNEL_ID" ON "note_draft" ("channelId")
+			`);
+
+			await queryRunner.query(`
+				ALTER TABLE "note_draft"
+				ADD CONSTRAINT "FK_NOTE_DRAFT_REPLY_ID" FOREIGN KEY ("replyId") REFERENCES "note"("id") ON DELETE CASCADE
+			`);
+
+			await queryRunner.query(`
+				ALTER TABLE "note_draft"
+				ADD CONSTRAINT "FK_NOTE_DRAFT_RENOTE_ID" FOREIGN KEY ("renoteId") REFERENCES "note"("id") ON DELETE CASCADE
+			`);
+
+			await queryRunner.query(`
+				ALTER TABLE "note_draft"
+				ADD CONSTRAINT "FK_NOTE_DRAFT_USER_ID" FOREIGN KEY ("userId") REFERENCES "user"("id") ON DELETE CASCADE
+			`);
+
+			await queryRunner.query(`
+				ALTER TABLE "note_draft"
+				ADD CONSTRAINT "FK_NOTE_DRAFT_CHANNEL_ID" FOREIGN KEY ("channelId") REFERENCES "channel"("id") ON DELETE CASCADE
+			`);
+    }
+
+    async down(queryRunner) {
+			await queryRunner.query(`ALTER TABLE "note_draft" DROP CONSTRAINT "FK_NOTE_DRAFT_CHANNEL_ID"`);
+			await queryRunner.query(`ALTER TABLE "note_draft" DROP CONSTRAINT "FK_NOTE_DRAFT_USER_ID"`);
+			await queryRunner.query(`ALTER TABLE "note_draft" DROP CONSTRAINT "FK_NOTE_DRAFT_RENOTE_ID"`);
+			await queryRunner.query(`ALTER TABLE "note_draft" DROP CONSTRAINT "FK_NOTE_DRAFT_REPLY_ID"`);
+			await queryRunner.query(`DROP INDEX "IDX_NOTE_DRAFT_CHANNEL_ID"`);
+			await queryRunner.query(`DROP INDEX "IDX_NOTE_DRAFT_VISIBLE_USER_IDS"`);
+			await queryRunner.query(`DROP INDEX "IDX_NOTE_DRAFT_FILE_IDS"`);
+			await queryRunner.query(`DROP INDEX "IDX_NOTE_DRAFT_USER_ID"`);
+			await queryRunner.query(`DROP INDEX "IDX_NOTE_DRAFT_RENOTE_ID"`);
+			await queryRunner.query(`DROP INDEX "IDX_NOTE_DRAFT_REPLY_ID"`);
+			await queryRunner.query(`DROP TABLE "note_draft"`);
+    }
+}
diff --git a/packages/backend/src/core/CoreModule.ts b/packages/backend/src/core/CoreModule.ts
index d8617e343c..0c0c5d3a39 100644
--- a/packages/backend/src/core/CoreModule.ts
+++ b/packages/backend/src/core/CoreModule.ts
@@ -44,6 +44,7 @@ import { ModerationLogService } from './ModerationLogService.js';
 import { NoteCreateService } from './NoteCreateService.js';
 import { NoteDeleteService } from './NoteDeleteService.js';
 import { NotePiningService } from './NotePiningService.js';
+import { NoteDraftService } from './NoteDraftService.js';
 import { NotificationService } from './NotificationService.js';
 import { PollService } from './PollService.js';
 import { PushNotificationService } from './PushNotificationService.js';
@@ -118,6 +119,7 @@ import { RenoteMutingEntityService } from './entities/RenoteMutingEntityService.
 import { NoteEntityService } from './entities/NoteEntityService.js';
 import { NoteFavoriteEntityService } from './entities/NoteFavoriteEntityService.js';
 import { NoteReactionEntityService } from './entities/NoteReactionEntityService.js';
+import { NoteDraftEntityService } from './entities/NoteDraftEntityService.js';
 import { NotificationEntityService } from './entities/NotificationEntityService.js';
 import { PageEntityService } from './entities/PageEntityService.js';
 import { PageLikeEntityService } from './entities/PageLikeEntityService.js';
@@ -185,6 +187,7 @@ const $ModerationLogService: Provider = { provide: 'ModerationLogService', useEx
 const $NoteCreateService: Provider = { provide: 'NoteCreateService', useExisting: NoteCreateService };
 const $NoteDeleteService: Provider = { provide: 'NoteDeleteService', useExisting: NoteDeleteService };
 const $NotePiningService: Provider = { provide: 'NotePiningService', useExisting: NotePiningService };
+const $NoteDraftService: Provider = { provide: 'NoteDraftService', useExisting: NoteDraftService };
 const $NotificationService: Provider = { provide: 'NotificationService', useExisting: NotificationService };
 const $PollService: Provider = { provide: 'PollService', useExisting: PollService };
 const $SystemAccountService: Provider = { provide: 'SystemAccountService', useExisting: SystemAccountService };
@@ -266,6 +269,7 @@ const $RenoteMutingEntityService: Provider = { provide: 'RenoteMutingEntityServi
 const $NoteEntityService: Provider = { provide: 'NoteEntityService', useExisting: NoteEntityService };
 const $NoteFavoriteEntityService: Provider = { provide: 'NoteFavoriteEntityService', useExisting: NoteFavoriteEntityService };
 const $NoteReactionEntityService: Provider = { provide: 'NoteReactionEntityService', useExisting: NoteReactionEntityService };
+const $NoteDraftEntityService: Provider = { provide: 'NoteDraftEntityService', useExisting: NoteDraftEntityService };
 const $NotificationEntityService: Provider = { provide: 'NotificationEntityService', useExisting: NotificationEntityService };
 const $PageEntityService: Provider = { provide: 'PageEntityService', useExisting: PageEntityService };
 const $PageLikeEntityService: Provider = { provide: 'PageLikeEntityService', useExisting: PageLikeEntityService };
@@ -335,6 +339,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		NoteCreateService,
 		NoteDeleteService,
 		NotePiningService,
+		NoteDraftService,
 		NotificationService,
 		PollService,
 		SystemAccountService,
@@ -416,6 +421,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		NoteEntityService,
 		NoteFavoriteEntityService,
 		NoteReactionEntityService,
+		NoteDraftEntityService,
 		NotificationEntityService,
 		PageEntityService,
 		PageLikeEntityService,
@@ -481,6 +487,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$NoteCreateService,
 		$NoteDeleteService,
 		$NotePiningService,
+		$NoteDraftService,
 		$NotificationService,
 		$PollService,
 		$SystemAccountService,
@@ -562,6 +569,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$NoteEntityService,
 		$NoteFavoriteEntityService,
 		$NoteReactionEntityService,
+		$NoteDraftEntityService,
 		$NotificationEntityService,
 		$PageEntityService,
 		$PageLikeEntityService,
@@ -628,6 +636,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		NoteCreateService,
 		NoteDeleteService,
 		NotePiningService,
+		NoteDraftService,
 		NotificationService,
 		PollService,
 		SystemAccountService,
@@ -708,6 +717,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		NoteEntityService,
 		NoteFavoriteEntityService,
 		NoteReactionEntityService,
+		NoteDraftEntityService,
 		NotificationEntityService,
 		PageEntityService,
 		PageLikeEntityService,
@@ -773,6 +783,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$NoteCreateService,
 		$NoteDeleteService,
 		$NotePiningService,
+		$NoteDraftService,
 		$NotificationService,
 		$PollService,
 		$SystemAccountService,
@@ -852,6 +863,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$NoteEntityService,
 		$NoteFavoriteEntityService,
 		$NoteReactionEntityService,
+		$NoteDraftEntityService,
 		$NotificationEntityService,
 		$PageEntityService,
 		$PageLikeEntityService,
diff --git a/packages/backend/src/core/NoteDraftService.ts b/packages/backend/src/core/NoteDraftService.ts
new file mode 100644
index 0000000000..c43be96efa
--- /dev/null
+++ b/packages/backend/src/core/NoteDraftService.ts
@@ -0,0 +1,314 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { In } from 'typeorm';
+import type { noteVisibilities, noteReactionAcceptances } from '@/types.js';
+import { DI } from '@/di-symbols.js';
+import type { MiNoteDraft, NoteDraftsRepository, MiNote, MiDriveFile, MiChannel, UsersRepository, DriveFilesRepository, NotesRepository, BlockingsRepository, ChannelsRepository } from '@/models/_.js';
+import { bindThis } from '@/decorators.js';
+import { RoleService } from '@/core/RoleService.js';
+import { IdService } from '@/core/IdService.js';
+import type { MiLocalUser, MiUser } from '@/models/User.js';
+import { IPoll } from '@/models/Poll.js';
+import { IdentifiableError } from '@/misc/identifiable-error.js';
+import { isRenote, isQuote } from '@/misc/is-renote.js';
+import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
+
+export type NoteDraftOptions = {
+	replyId?: MiNote['id'] | null;
+	renoteId?: MiNote['id'] | null;
+	text?: string | null;
+	cw?: string | null;
+	localOnly?: boolean | null;
+	reactionAcceptance?: typeof noteReactionAcceptances[number];
+	visibility?: typeof noteVisibilities[number];
+	fileIds?: MiDriveFile['id'][];
+	visibleUserIds?: MiUser['id'][];
+	hashtag?: string;
+	channelId?: MiChannel['id'] | null;
+	poll?: (IPoll & { expiredAfter?: number | null }) | null;
+};
+
+@Injectable()
+export class NoteDraftService {
+	constructor(
+		@Inject(DI.blockingsRepository)
+		private blockingsRepository: BlockingsRepository,
+
+		@Inject(DI.noteDraftsRepository)
+		private noteDraftsRepository: NoteDraftsRepository,
+
+		@Inject(DI.notesRepository)
+		private notesRepository: NotesRepository,
+
+		@Inject(DI.usersRepository)
+		private usersRepository: UsersRepository,
+
+		@Inject(DI.driveFilesRepository)
+		private driveFilesRepository: DriveFilesRepository,
+
+		@Inject(DI.channelsRepository)
+		private channelsRepository: ChannelsRepository,
+
+		private roleService: RoleService,
+		private idService: IdService,
+		private noteEntityService: NoteEntityService,
+	) {
+	}
+
+	@bindThis
+	public async get(me: MiLocalUser, draftId: MiNoteDraft['id']): Promise<MiNoteDraft | null> {
+		const draft = await this.noteDraftsRepository.findOneBy({
+			id: draftId,
+			userId: me.id,
+		});
+
+		return draft;
+	}
+
+	@bindThis
+	public async create(me: MiLocalUser, data: NoteDraftOptions): Promise<MiNoteDraft> {
+		//#region check draft limit
+
+		const currentCount = await this.noteDraftsRepository.countBy({
+			userId: me.id,
+		});
+		if (currentCount >= (await this.roleService.getUserPolicies(me.id)).noteDraftLimit) {
+			throw new IdentifiableError('9ee33bbe-fde3-4c71-9b51-e50492c6b9c8', 'Too many drafts');
+		}
+		//#endregion
+
+		if (data.poll) {
+			if (typeof data.poll.expiresAt === 'number') {
+				if (data.poll.expiresAt < Date.now()) {
+					throw new IdentifiableError('04da457d-b083-4055-9082-955525eda5a5', 'Cannot create expired poll');
+				}
+			} else if (typeof data.poll.expiredAfter === 'number') {
+				data.poll.expiresAt = new Date(Date.now() + data.poll.expiredAfter);
+			}
+		}
+
+		const appliedDraft = await this.checkAndSetDraftNoteOptions(me, this.noteDraftsRepository.create(), data);
+
+		appliedDraft.id = this.idService.gen();
+		appliedDraft.userId = me.id;
+		const draft = this.noteDraftsRepository.save(appliedDraft);
+
+		return draft;
+	}
+
+	@bindThis
+	public async update(me: MiLocalUser, draftId: MiNoteDraft['id'], data: NoteDraftOptions): Promise<MiNoteDraft> {
+		const draft = await this.noteDraftsRepository.findOneBy({
+			id: draftId,
+			userId: me.id,
+		});
+
+		if (draft == null) {
+			throw new IdentifiableError('49cd6b9d-848e-41ee-b0b9-adaca711a6b1', 'No such note draft');
+		}
+
+		if (data.poll) {
+			if (typeof data.poll.expiresAt === 'number') {
+				if (data.poll.expiresAt < Date.now()) {
+					throw new IdentifiableError('04da457d-b083-4055-9082-955525eda5a5', 'Cannot create expired poll');
+				}
+			} else if (typeof data.poll.expiredAfter === 'number') {
+				data.poll.expiresAt = new Date(Date.now() + data.poll.expiredAfter);
+			}
+		}
+
+		const appliedDraft = await this.checkAndSetDraftNoteOptions(me, draft, data);
+
+		return await this.noteDraftsRepository.save(appliedDraft);
+	}
+
+	@bindThis
+	public async delete(me: MiLocalUser, draftId: MiNoteDraft['id']): Promise<void> {
+		const draft = await this.noteDraftsRepository.findOneBy({
+			id: draftId,
+			userId: me.id,
+		});
+
+		if (draft == null) {
+			throw new IdentifiableError('49cd6b9d-848e-41ee-b0b9-adaca711a6b1', 'No such note draft');
+		}
+
+		await this.noteDraftsRepository.delete(draft.id);
+	}
+
+	@bindThis
+	public async getDraft(me: MiLocalUser, draftId: MiNoteDraft['id']): Promise<MiNoteDraft> {
+		const draft = await this.noteDraftsRepository.findOneBy({
+			id: draftId,
+			userId: me.id,
+		});
+
+		if (draft == null) {
+			throw new IdentifiableError('49cd6b9d-848e-41ee-b0b9-adaca711a6b1', 'No such note draft');
+		}
+
+		return draft;
+	}
+
+	// 関連エンティティを取得し紐づける部分を共通化する
+	@bindThis
+	public async checkAndSetDraftNoteOptions(
+		me: MiLocalUser,
+		draft: MiNoteDraft,
+		data: NoteDraftOptions,
+	): Promise<MiNoteDraft> {
+		data.visibility ??= 'public';
+		data.localOnly ??= false;
+		if (data.reactionAcceptance === undefined) data.reactionAcceptance = null;
+		if (data.channelId != null) {
+			data.visibility = 'public';
+			data.visibleUserIds = [];
+			data.localOnly = true;
+		}
+
+		let appliedDraft = draft;
+
+		//#region visibleUsers
+		let visibleUsers: MiUser[] = [];
+		if (data.visibleUserIds != null) {
+			visibleUsers = await this.usersRepository.findBy({
+				id: In(data.visibleUserIds),
+			});
+		}
+		//#endregion
+
+		//#region files
+		let files: MiDriveFile[] = [];
+		const fileIds = data.fileIds ?? null;
+		if (fileIds != null) {
+			files = await this.driveFilesRepository.createQueryBuilder('file')
+				.where('file.userId = :userId AND file.id IN (:...fileIds)', {
+					userId: me.id,
+					fileIds: fileIds,
+				})
+				.orderBy('array_position(ARRAY[:...fileIds], "id"::text)')
+				.setParameters({ fileIds })
+				.getMany();
+
+			if (files.length !== fileIds.length) {
+				throw new IdentifiableError('b6992544-63e7-67f0-fa7f-32444b1b5306', 'No such drive file');
+			}
+		}
+		//#endregion
+
+		//#region renote
+		let renote: MiNote | null = null;
+		if (data.renoteId != null) {
+			renote = await this.notesRepository.findOneBy({ id: data.renoteId });
+
+			if (renote == null) {
+				throw new IdentifiableError('64929870-2540-4d11-af41-3b484d78c956', 'No such renote');
+			} else if (isRenote(renote) && !isQuote(renote)) {
+				throw new IdentifiableError('76cc5583-5a14-4ad3-8717-0298507e32db', 'Cannot renote');
+			}
+
+			// Check blocking
+			if (renote.userId !== me.id) {
+				const blockExist = await this.blockingsRepository.exists({
+					where: {
+						blockerId: renote.userId,
+						blockeeId: me.id,
+					},
+				});
+				if (blockExist) {
+					throw new IdentifiableError('075ca298-e6e7-485a-b570-51a128bb5168', 'You have been blocked by the user');
+				}
+			}
+
+			if (renote.visibility === 'followers' && renote.userId !== me.id) {
+				// 他人のfollowers noteはreject
+				throw new IdentifiableError('81eb8188-aea1-4e35-9a8f-3334a3be9855', 'Cannot Renote Due to Visibility');
+			} else if (renote.visibility === 'specified') {
+				// specified / direct noteはreject
+				throw new IdentifiableError('81eb8188-aea1-4e35-9a8f-3334a3be9855', 'Cannot Renote Due to Visibility');
+			}
+
+			if (renote.channelId && renote.channelId !== data.channelId) {
+				// チャンネルのノートに対しリノート要求がきたとき、チャンネル外へのリノート可否をチェック
+				// リノートのユースケースのうち、チャンネル内→チャンネル外は少数だと考えられるため、JOINはせず必要な時に都度取得する
+				const renoteChannel = await this.channelsRepository.findOneBy({ id: renote.channelId });
+				if (renoteChannel == null) {
+					// リノートしたいノートが書き込まれているチャンネルがない
+					throw new IdentifiableError('6815399a-6f13-4069-b60d-ed5156249d12', 'No such channel');
+				} else if (!renoteChannel.allowRenoteToExternal) {
+					// リノート作成のリクエストだが、対象チャンネルがリノート禁止だった場合
+					throw new IdentifiableError('ed1952ac-2d26-4957-8b30-2deda76bedf7', 'Cannot Renote to External');
+				}
+			}
+		}
+		//#endregion
+
+		//#region reply
+		let reply: MiNote | null = null;
+		if (data.replyId != null) {
+			// Fetch reply
+			reply = await this.notesRepository.findOneBy({ id: data.replyId });
+
+			if (reply == null) {
+				throw new IdentifiableError('c4721841-22fc-4bb7-ad3d-897ef1d375b5', 'No such reply');
+			} else if (isRenote(reply) && !isQuote(reply)) {
+				throw new IdentifiableError('e6c10b57-2c09-4da3-bd4d-eda05d51d140', 'Cannot reply To Pure Renote');
+			} else if (!await this.noteEntityService.isVisibleForMe(reply, me.id)) {
+				throw new IdentifiableError('593c323c-6b6a-4501-a25c-2f36bd2a93d6', 'Cannot reply To Invisible Note');
+			} else if (reply.visibility === 'specified' && data.visibility !== 'specified') {
+				throw new IdentifiableError('215dbc76-336c-4d2a-9605-95766ba7dab0', 'Cannot reply To Specified Note With Extended Visibility');
+			}
+
+			// Check blocking
+			if (reply.userId !== me.id) {
+				const blockExist = await this.blockingsRepository.exists({
+					where: {
+						blockerId: reply.userId,
+						blockeeId: me.id,
+					},
+				});
+				if (blockExist) {
+					throw new IdentifiableError('075ca298-e6e7-485a-b570-51a128bb5168', 'You have been blocked by the user');
+				}
+			}
+		}
+		//#endregion
+
+		//#region channel
+		let channel: MiChannel | null = null;
+		if (data.channelId != null) {
+			channel = await this.channelsRepository.findOneBy({ id: data.channelId, isArchived: false });
+
+			if (channel == null) {
+				throw new IdentifiableError('6815399a-6f13-4069-b60d-ed5156249d12', 'No such channel');
+			}
+		}
+		//#endregion
+
+		appliedDraft = {
+			...appliedDraft,
+			visibility: data.visibility,
+			cw: data.cw ?? null,
+			fileIds: fileIds ?? [],
+			replyId: data.replyId ?? null,
+			renoteId: data.renoteId ?? null,
+			channelId: data.channelId ?? null,
+			text: data.text ?? null,
+			hashtag: data.hashtag ?? null,
+			hasPoll: data.poll != null,
+			pollChoices: data.poll ? data.poll.choices : [],
+			pollMultiple: data.poll ? data.poll.multiple : false,
+			pollExpiresAt: data.poll ? data.poll.expiresAt : null,
+			pollExpiredAfter: data.poll ? data.poll.expiredAfter ?? null : null,
+			visibleUserIds: data.visibleUserIds ?? [],
+			localOnly: data.localOnly,
+			reactionAcceptance: data.reactionAcceptance,
+		} satisfies MiNoteDraft;
+
+		return appliedDraft;
+	}
+}
diff --git a/packages/backend/src/core/RoleService.ts b/packages/backend/src/core/RoleService.ts
index 76dafeb255..314f7e221a 100644
--- a/packages/backend/src/core/RoleService.ts
+++ b/packages/backend/src/core/RoleService.ts
@@ -66,6 +66,7 @@ export type RolePolicies = {
 	canImportUserLists: boolean;
 	chatAvailability: 'available' | 'readonly' | 'unavailable';
 	uploadableFileTypes: string[];
+	noteDraftLimit: number;
 };
 
 export const DEFAULT_POLICIES: RolePolicies = {
@@ -109,6 +110,7 @@ export const DEFAULT_POLICIES: RolePolicies = {
 		'video/*',
 		'audio/*',
 	],
+	noteDraftLimit: 10,
 };
 
 @Injectable()
@@ -430,6 +432,7 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 				}
 				return [...set];
 			}),
+			noteDraftLimit: calc('noteDraftLimit', vs => Math.max(...vs)),
 		};
 	}
 
diff --git a/packages/backend/src/core/entities/NoteDraftEntityService.ts b/packages/backend/src/core/entities/NoteDraftEntityService.ts
new file mode 100644
index 0000000000..26455029d5
--- /dev/null
+++ b/packages/backend/src/core/entities/NoteDraftEntityService.ts
@@ -0,0 +1,177 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { ModuleRef } from '@nestjs/core';
+import { DI } from '@/di-symbols.js';
+import type { Packed } from '@/misc/json-schema.js';
+import { awaitAll } from '@/misc/prelude/await-all.js';
+import type { MiUser, MiNote, MiNoteDraft } from '@/models/_.js';
+import type { NoteDraftsRepository, ChannelsRepository } from '@/models/_.js';
+import { bindThis } from '@/decorators.js';
+import { DebounceLoader } from '@/misc/loader.js';
+import { IdService } from '@/core/IdService.js';
+import type { OnModuleInit } from '@nestjs/common';
+import type { UserEntityService } from './UserEntityService.js';
+import type { DriveFileEntityService } from './DriveFileEntityService.js';
+import type { NoteEntityService } from './NoteEntityService.js';
+
+@Injectable()
+export class NoteDraftEntityService implements OnModuleInit {
+	private userEntityService: UserEntityService;
+	private driveFileEntityService: DriveFileEntityService;
+	private idService: IdService;
+	private noteEntityService: NoteEntityService;
+	private noteDraftLoader = new DebounceLoader(this.findNoteDraftOrFail);
+
+	constructor(
+		private moduleRef: ModuleRef,
+
+		@Inject(DI.noteDraftsRepository)
+		private noteDraftsRepository: NoteDraftsRepository,
+
+		@Inject(DI.channelsRepository)
+		private channelsRepository: ChannelsRepository,
+	) {
+	}
+
+	onModuleInit() {
+		this.userEntityService = this.moduleRef.get('UserEntityService');
+		this.driveFileEntityService = this.moduleRef.get('DriveFileEntityService');
+		this.idService = this.moduleRef.get('IdService');
+		this.noteEntityService = this.moduleRef.get('NoteEntityService');
+	}
+
+	@bindThis
+	public async packAttachedFiles(fileIds: MiNote['fileIds'], packedFiles: Map<MiNote['fileIds'][number], Packed<'DriveFile'> | null>): Promise<Packed<'DriveFile'>[]> {
+		const missingIds = [];
+		for (const id of fileIds) {
+			if (!packedFiles.has(id)) missingIds.push(id);
+		}
+		if (missingIds.length) {
+			const additionalMap = await this.driveFileEntityService.packManyByIdsMap(missingIds);
+			for (const [k, v] of additionalMap) {
+				packedFiles.set(k, v);
+			}
+		}
+		return fileIds.map(id => packedFiles.get(id)).filter(x => x != null);
+	}
+
+	@bindThis
+	public async pack(
+		src: MiNoteDraft['id'] | MiNoteDraft,
+		me?: { id: MiUser['id'] } | null | undefined,
+		options?: {
+			detail?: boolean;
+			skipHide?: boolean;
+			withReactionAndUserPairCache?: boolean;
+			_hint_?: {
+				packedFiles: Map<MiNote['fileIds'][number], Packed<'DriveFile'> | null>;
+				packedUsers: Map<MiUser['id'], Packed<'UserLite'>>
+			};
+		},
+	): Promise<Packed<'NoteDraft'>> {
+		const opts = Object.assign({
+			detail: true,
+		}, options);
+
+		const noteDraft = typeof src === 'object' ? src : await this.noteDraftLoader.load(src);
+
+		const text = noteDraft.text;
+
+		const channel = noteDraft.channelId
+			? noteDraft.channel
+				? noteDraft.channel
+				: await this.channelsRepository.findOneBy({ id: noteDraft.channelId })
+			: null;
+
+		const packedFiles = options?._hint_?.packedFiles;
+		const packedUsers = options?._hint_?.packedUsers;
+
+		const packed: Packed<'NoteDraft'> = await awaitAll({
+			id: noteDraft.id,
+			createdAt: this.idService.parse(noteDraft.id).date.toISOString(),
+			userId: noteDraft.userId,
+			user: packedUsers?.get(noteDraft.userId) ?? this.userEntityService.pack(noteDraft.user ?? noteDraft.userId, me),
+			text: text,
+			cw: noteDraft.cw,
+			visibility: noteDraft.visibility,
+			localOnly: noteDraft.localOnly,
+			reactionAcceptance: noteDraft.reactionAcceptance,
+			visibleUserIds: noteDraft.visibility === 'specified' ? noteDraft.visibleUserIds : undefined,
+			hashtag: noteDraft.hashtag ?? undefined,
+			fileIds: noteDraft.fileIds,
+			files: packedFiles != null ? this.packAttachedFiles(noteDraft.fileIds, packedFiles) : this.driveFileEntityService.packManyByIds(noteDraft.fileIds),
+			replyId: noteDraft.replyId,
+			renoteId: noteDraft.renoteId,
+			channelId: noteDraft.channelId ?? undefined,
+			channel: channel ? {
+				id: channel.id,
+				name: channel.name,
+				color: channel.color,
+				isSensitive: channel.isSensitive,
+				allowRenoteToExternal: channel.allowRenoteToExternal,
+				userId: channel.userId,
+			} : undefined,
+
+			...(opts.detail ? {
+				reply: noteDraft.replyId ? this.noteEntityService.pack(noteDraft.replyId, me, {
+					detail: false,
+					skipHide: opts.skipHide,
+				}) : undefined,
+
+				renote: noteDraft.renoteId ? this.noteEntityService.pack(noteDraft.renoteId, me, {
+					detail: true,
+					skipHide: opts.skipHide,
+				}) : undefined,
+
+				poll: noteDraft.hasPoll ? {
+					choices: noteDraft.pollChoices,
+					multiple: noteDraft.pollMultiple,
+					expiresAt: noteDraft.pollExpiresAt?.toISOString(),
+					expiredAfter: noteDraft.pollExpiredAfter,
+				} : undefined,
+			} : {} ),
+		});
+
+		return packed;
+	}
+
+	@bindThis
+	public async packMany(
+		noteDrafts: MiNoteDraft[],
+		me?: { id: MiUser['id'] } | null | undefined,
+		options?: {
+			detail?: boolean;
+		},
+	) {
+		if (noteDrafts.length === 0) return [];
+
+		// TODO: 本当は renote とか reply がないのに renoteId とか replyId があったらここで解決しておく
+		const fileIds = noteDrafts.map(n => [n.fileIds, n.renote?.fileIds, n.reply?.fileIds]).flat(2).filter(x => x != null);
+		const packedFiles = fileIds.length > 0 ? await this.driveFileEntityService.packManyByIdsMap(fileIds) : new Map();
+		const users = [
+			...noteDrafts.map(({ user, userId }) => user ?? userId),
+		];
+		const packedUsers = await this.userEntityService.packMany(users, me)
+			.then(users => new Map(users.map(u => [u.id, u])));
+
+		return await Promise.all(noteDrafts.map(n => this.pack(n, me, {
+			...options,
+			_hint_: {
+				packedFiles,
+				packedUsers,
+			},
+		})));
+	}
+
+	@bindThis
+	private findNoteDraftOrFail(id: string): Promise<MiNoteDraft> {
+		return this.noteDraftsRepository.findOneOrFail({
+			where: { id },
+			relations: ['user'],
+		});
+	}
+}
diff --git a/packages/backend/src/di-symbols.ts b/packages/backend/src/di-symbols.ts
index 77d2838e09..c915133453 100644
--- a/packages/backend/src/di-symbols.ts
+++ b/packages/backend/src/di-symbols.ts
@@ -89,5 +89,6 @@ export const DI = {
 	chatRoomInvitationsRepository: Symbol('chatRoomInvitationsRepository'),
 	bubbleGameRecordsRepository: Symbol('bubbleGameRecordsRepository'),
 	reversiGamesRepository: Symbol('reversiGamesRepository'),
+	noteDraftsRepository: Symbol('noteDraftsRepository'),
 	//#endregion
 };
diff --git a/packages/backend/src/misc/json-schema.ts b/packages/backend/src/misc/json-schema.ts
index 5e5d7041b9..ed47edff9b 100644
--- a/packages/backend/src/misc/json-schema.ts
+++ b/packages/backend/src/misc/json-schema.ts
@@ -72,6 +72,7 @@ import { packedChatRoomSchema } from '@/models/json-schema/chat-room.js';
 import { packedChatRoomInvitationSchema } from '@/models/json-schema/chat-room-invitation.js';
 import { packedChatRoomMembershipSchema } from '@/models/json-schema/chat-room-membership.js';
 import { packedAchievementNameSchema, packedAchievementSchema } from '@/models/json-schema/achievement.js';
+import { packedNoteDraftSchema } from '@/models/json-schema/note-draft.js';
 
 export const refs = {
 	UserLite: packedUserLiteSchema,
@@ -89,6 +90,7 @@ export const refs = {
 	Announcement: packedAnnouncementSchema,
 	App: packedAppSchema,
 	Note: packedNoteSchema,
+	NoteDraft: packedNoteDraftSchema,
 	NoteReaction: packedNoteReactionSchema,
 	NoteFavorite: packedNoteFavoriteSchema,
 	Notification: packedNotificationSchema,
diff --git a/packages/backend/src/models/Note.ts b/packages/backend/src/models/Note.ts
index 3dcbdb735b..0560ee17c0 100644
--- a/packages/backend/src/models/Note.ts
+++ b/packages/backend/src/models/Note.ts
@@ -4,7 +4,7 @@
  */
 
 import { Entity, Index, JoinColumn, Column, PrimaryColumn, ManyToOne } from 'typeorm';
-import { noteVisibilities } from '@/types.js';
+import { noteVisibilities, noteReactionAcceptances } from '@/types.js';
 import { id } from './util/id.js';
 import { MiUser } from './User.js';
 import { MiChannel } from './Channel.js';
@@ -96,7 +96,7 @@ export class MiNote {
 	@Column('varchar', {
 		length: 64, nullable: true,
 	})
-	public reactionAcceptance: 'likeOnly' | 'likeOnlyForRemote' | 'nonSensitiveOnly' | 'nonSensitiveOnlyForLocalLikeOnlyForRemote' | null;
+	public reactionAcceptance: typeof noteReactionAcceptances[number];
 
 	@Column('smallint', {
 		default: 0,
diff --git a/packages/backend/src/models/NoteDraft.ts b/packages/backend/src/models/NoteDraft.ts
new file mode 100644
index 0000000000..edae254bb8
--- /dev/null
+++ b/packages/backend/src/models/NoteDraft.ts
@@ -0,0 +1,157 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Entity, Index, JoinColumn, Column, PrimaryColumn, ManyToOne } from 'typeorm';
+import { noteVisibilities, noteReactionAcceptances } from '@/types.js';
+import { id } from './util/id.js';
+import { MiUser } from './User.js';
+import { MiChannel } from './Channel.js';
+import { MiNote } from './Note.js';
+import type { MiDriveFile } from './DriveFile.js';
+
+@Entity('note_draft')
+export class MiNoteDraft {
+	@PrimaryColumn(id())
+	public id: string;
+
+	@Index()
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The ID of reply target.',
+	})
+	public replyId: MiNote['id'] | null;
+
+	@ManyToOne(type => MiNote, {
+		onDelete: 'CASCADE',
+	})
+	@JoinColumn()
+	public reply: MiNote | null;
+
+	@Index()
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The ID of renote target.',
+	})
+	public renoteId: MiNote['id'] | null;
+
+	@ManyToOne(type => MiNote, {
+		onDelete: 'CASCADE',
+	})
+	@JoinColumn()
+	public renote: MiNote | null;
+
+	// TODO: varcharにしたい(Note.tsと同じ)
+	@Column('text', {
+		nullable: true,
+	})
+	public text: string | null;
+
+	@Column('varchar', {
+		length: 512, nullable: true,
+	})
+	public cw: string | null;
+
+	@Index()
+	@Column({
+		...id(),
+		comment: 'The ID of author.',
+	})
+	public userId: MiUser['id'];
+
+	@ManyToOne(type => MiUser, {
+		onDelete: 'CASCADE',
+	})
+	@JoinColumn()
+	public user: MiUser | null;
+
+	@Column('boolean', {
+		default: false,
+	})
+	public localOnly: boolean;
+
+	@Column('varchar', {
+		length: 64, nullable: true,
+	})
+	public reactionAcceptance: typeof noteReactionAcceptances[number];
+
+	/**
+	 * public ... 公開
+	 * home ... ホームタイムライン(ユーザーページのタイムライン含む)のみに流す
+	 * followers ... フォロワーのみ
+	 * specified ... visibleUserIds で指定したユーザーのみ
+	 */
+	@Column('enum', { enum: noteVisibilities })
+	public visibility: typeof noteVisibilities[number];
+
+	@Index('IDX_NOTE_DRAFT_FILE_IDS', { synchronize: false })
+	@Column({
+		...id(),
+		array: true, default: '{}',
+	})
+	public fileIds: MiDriveFile['id'][];
+
+	@Index('IDX_NOTE_DRAFT_VISIBLE_USER_IDS', { synchronize: false })
+	@Column({
+		...id(),
+		array: true, default: '{}',
+	})
+	public visibleUserIds: MiUser['id'][];
+
+	@Column('varchar', {
+		length: 128, nullable: true,
+	})
+	public hashtag: string | null;
+
+	@Index()
+	@Column({
+		...id(),
+		nullable: true,
+		comment: 'The ID of source channel.',
+	})
+	public channelId: MiChannel['id'] | null;
+
+	@ManyToOne(type => MiChannel, {
+		onDelete: 'CASCADE',
+	})
+	@JoinColumn()
+	public channel: MiChannel | null;
+
+	// 以下、Pollについて追加
+
+	@Column('boolean', {
+		default: false,
+	})
+	public hasPoll: boolean;
+
+	@Column('varchar', {
+		length: 256, array: true, default: '{}',
+	})
+	public pollChoices: string[];
+
+	@Column('boolean')
+	public pollMultiple: boolean;
+
+	@Column('timestamp with time zone', {
+		nullable: true,
+	})
+	public pollExpiresAt: Date | null;
+
+	@Column('bigint', {
+		nullable: true,
+	})
+	public pollExpiredAfter: number | null;
+
+	// ここまで追加
+
+	constructor(data: Partial<MiNoteDraft>) {
+		if (data == null) return;
+
+		for (const [k, v] of Object.entries(data)) {
+			(this as any)[k] = v;
+		}
+	}
+}
diff --git a/packages/backend/src/models/RepositoryModule.ts b/packages/backend/src/models/RepositoryModule.ts
index b7142d91bf..146dbbc3b8 100644
--- a/packages/backend/src/models/RepositoryModule.ts
+++ b/packages/backend/src/models/RepositoryModule.ts
@@ -42,6 +42,7 @@ import {
 	MiNoteFavorite,
 	MiNoteReaction,
 	MiNoteThreadMuting,
+	MiNoteDraft,
 	MiPage,
 	MiPageLike,
 	MiPasswordResetRequest,
@@ -140,6 +141,12 @@ const $noteReactionsRepository: Provider = {
 	inject: [DI.db],
 };
 
+const $noteDraftsRepository: Provider = {
+	provide: DI.noteDraftsRepository,
+	useFactory: (db: DataSource) => db.getRepository(MiNoteDraft).extend(miRepository as MiRepository<MiNoteDraft>),
+	inject: [DI.db],
+};
+
 const $pollsRepository: Provider = {
 	provide: DI.pollsRepository,
 	useFactory: (db: DataSource) => db.getRepository(MiPoll).extend(miRepository as MiRepository<MiPoll>),
@@ -542,6 +549,7 @@ const $reversiGamesRepository: Provider = {
 		$noteFavoritesRepository,
 		$noteThreadMutingsRepository,
 		$noteReactionsRepository,
+		$noteDraftsRepository,
 		$pollsRepository,
 		$pollVotesRepository,
 		$userProfilesRepository,
@@ -618,6 +626,7 @@ const $reversiGamesRepository: Provider = {
 		$noteFavoritesRepository,
 		$noteThreadMutingsRepository,
 		$noteReactionsRepository,
+		$noteDraftsRepository,
 		$pollsRepository,
 		$pollVotesRepository,
 		$userProfilesRepository,
diff --git a/packages/backend/src/models/_.ts b/packages/backend/src/models/_.ts
index e1ea2a2604..84b5cbed0a 100644
--- a/packages/backend/src/models/_.ts
+++ b/packages/backend/src/models/_.ts
@@ -55,6 +55,7 @@ import { MiMeta } from '@/models/Meta.js';
 import { MiModerationLog } from '@/models/ModerationLog.js';
 import { MiMuting } from '@/models/Muting.js';
 import { MiNote } from '@/models/Note.js';
+import { MiNoteDraft } from '@/models/NoteDraft.js';
 import { MiNoteFavorite } from '@/models/NoteFavorite.js';
 import { MiNoteReaction } from '@/models/NoteReaction.js';
 import { MiNoteThreadMuting } from '@/models/NoteThreadMuting.js';
@@ -188,6 +189,7 @@ export {
 	MiMuting,
 	MiRenoteMuting,
 	MiNote,
+	MiNoteDraft,
 	MiNoteFavorite,
 	MiNoteReaction,
 	MiNoteThreadMuting,
@@ -266,6 +268,7 @@ export type ModerationLogsRepository = Repository<MiModerationLog> & MiRepositor
 export type MutingsRepository = Repository<MiMuting> & MiRepository<MiMuting>;
 export type RenoteMutingsRepository = Repository<MiRenoteMuting> & MiRepository<MiRenoteMuting>;
 export type NotesRepository = Repository<MiNote> & MiRepository<MiNote>;
+export type NoteDraftsRepository = Repository<MiNoteDraft> & MiRepository<MiNoteDraft>;
 export type NoteFavoritesRepository = Repository<MiNoteFavorite> & MiRepository<MiNoteFavorite>;
 export type NoteReactionsRepository = Repository<MiNoteReaction> & MiRepository<MiNoteReaction>;
 export type NoteThreadMutingsRepository = Repository<MiNoteThreadMuting> & MiRepository<MiNoteThreadMuting>;
diff --git a/packages/backend/src/models/json-schema/note-draft.ts b/packages/backend/src/models/json-schema/note-draft.ts
new file mode 100644
index 0000000000..20c56d0795
--- /dev/null
+++ b/packages/backend/src/models/json-schema/note-draft.ts
@@ -0,0 +1,169 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export const packedNoteDraftSchema = {
+	type: 'object',
+	properties: {
+		id: {
+			type: 'string',
+			optional: false, nullable: false,
+			format: 'id',
+			example: 'xxxxxxxxxx',
+		},
+		createdAt: {
+			type: 'string',
+			optional: false, nullable: false,
+			format: 'date-time',
+		},
+		text: {
+			type: 'string',
+			optional: false, nullable: true,
+		},
+		cw: {
+			type: 'string',
+			optional: true, nullable: true,
+		},
+		userId: {
+			type: 'string',
+			optional: false, nullable: false,
+			format: 'id',
+		},
+		user: {
+			type: 'object',
+			ref: 'UserLite',
+			optional: false, nullable: false,
+		},
+		replyId: {
+			type: 'string',
+			optional: true, nullable: true,
+			format: 'id',
+			example: 'xxxxxxxxxx',
+		},
+		renoteId: {
+			type: 'string',
+			optional: true, nullable: true,
+			format: 'id',
+			example: 'xxxxxxxxxx',
+		},
+		reply: {
+			type: 'object',
+			optional: true, nullable: true,
+			ref: 'Note',
+		},
+		renote: {
+			type: 'object',
+			optional: true, nullable: true,
+			ref: 'Note',
+		},
+		visibility: {
+			type: 'string',
+			optional: false, nullable: false,
+			enum: ['public', 'home', 'followers', 'specified'],
+		},
+		visibleUserIds: {
+			type: 'array',
+			optional: true, nullable: false,
+			items: {
+				type: 'string',
+				optional: false, nullable: false,
+				format: 'id',
+			},
+		},
+		fileIds: {
+			type: 'array',
+			optional: true, nullable: false,
+			items: {
+				type: 'string',
+				optional: false, nullable: false,
+				format: 'id',
+			},
+		},
+		files: {
+			type: 'array',
+			optional: true, nullable: false,
+			items: {
+				type: 'object',
+				optional: false, nullable: false,
+				ref: 'DriveFile',
+			},
+		},
+		hashtag: {
+			type: 'string',
+			optional: true, nullable: false,
+		},
+		poll: {
+			type: 'object',
+			optional: true, nullable: true,
+			properties: {
+				expiresAt: {
+					type: 'string',
+					optional: true, nullable: true,
+					format: 'date-time',
+				},
+				expiredAfter: {
+					type: 'number',
+					optional: true, nullable: true,
+				},
+				multiple: {
+					type: 'boolean',
+					optional: false, nullable: false,
+				},
+				choices: {
+					type: 'array',
+					optional: false, nullable: false,
+					items: {
+						type: 'string',
+						optional: false, nullable: false,
+					},
+				},
+			},
+		},
+		channelId: {
+			type: 'string',
+			optional: true, nullable: true,
+			format: 'id',
+			example: 'xxxxxxxxxx',
+		},
+		channel: {
+			type: 'object',
+			optional: true, nullable: true,
+			properties: {
+				id: {
+					type: 'string',
+					optional: false, nullable: false,
+				},
+				name: {
+					type: 'string',
+					optional: false, nullable: false,
+				},
+				color: {
+					type: 'string',
+					optional: false, nullable: false,
+				},
+				isSensitive: {
+					type: 'boolean',
+					optional: false, nullable: false,
+				},
+				allowRenoteToExternal: {
+					type: 'boolean',
+					optional: false, nullable: false,
+				},
+				userId: {
+					type: 'string',
+					optional: false, nullable: true,
+				},
+			},
+		},
+		localOnly: {
+			type: 'boolean',
+			optional: true, nullable: false,
+		},
+		reactionAcceptance: {
+			type: 'string',
+			optional: false, nullable: true,
+			enum: ['likeOnly', 'likeOnlyForRemote', 'nonSensitiveOnly', 'nonSensitiveOnlyForLocalLikeOnlyForRemote', null],
+		},
+	},
+} as const;
diff --git a/packages/backend/src/models/json-schema/role.ts b/packages/backend/src/models/json-schema/role.ts
index 8bd01c92a3..a3f679129d 100644
--- a/packages/backend/src/models/json-schema/role.ts
+++ b/packages/backend/src/models/json-schema/role.ts
@@ -309,6 +309,10 @@ export const packedRolePoliciesSchema = {
 			optional: false, nullable: false,
 			enum: ['available', 'readonly', 'unavailable'],
 		},
+		noteDraftLimit: {
+			type: 'integer',
+			optional: false, nullable: false,
+		},
 	},
 } as const;
 
diff --git a/packages/backend/src/postgres.ts b/packages/backend/src/postgres.ts
index b06895fcc9..f6cbbbe64c 100644
--- a/packages/backend/src/postgres.ts
+++ b/packages/backend/src/postgres.ts
@@ -45,6 +45,7 @@ import { MiNote } from '@/models/Note.js';
 import { MiNoteFavorite } from '@/models/NoteFavorite.js';
 import { MiNoteReaction } from '@/models/NoteReaction.js';
 import { MiNoteThreadMuting } from '@/models/NoteThreadMuting.js';
+import { MiNoteDraft } from '@/models/NoteDraft.js';
 import { MiPage } from '@/models/Page.js';
 import { MiPageLike } from '@/models/PageLike.js';
 import { MiPasswordResetRequest } from '@/models/PasswordResetRequest.js';
@@ -210,6 +211,7 @@ export const entities = [
 	MiNoteFavorite,
 	MiNoteReaction,
 	MiNoteThreadMuting,
+	MiNoteDraft,
 	MiPage,
 	MiPageLike,
 	MiGalleryPost,
diff --git a/packages/backend/src/server/api/endpoint-list.ts b/packages/backend/src/server/api/endpoint-list.ts
index 092d296bd3..f7b2fad341 100644
--- a/packages/backend/src/server/api/endpoint-list.ts
+++ b/packages/backend/src/server/api/endpoint-list.ts
@@ -307,6 +307,11 @@ export * as 'notes/clips' from './endpoints/notes/clips.js';
 export * as 'notes/conversation' from './endpoints/notes/conversation.js';
 export * as 'notes/create' from './endpoints/notes/create.js';
 export * as 'notes/delete' from './endpoints/notes/delete.js';
+export * as 'notes/drafts/list' from './endpoints/notes/drafts/list.js';
+export * as 'notes/drafts/create' from './endpoints/notes/drafts/create.js';
+export * as 'notes/drafts/delete' from './endpoints/notes/drafts/delete.js';
+export * as 'notes/drafts/update' from './endpoints/notes/drafts/update.js';
+export * as 'notes/drafts/count' from './endpoints/notes/drafts/count.js';
 export * as 'notes/favorites/create' from './endpoints/notes/favorites/create.js';
 export * as 'notes/favorites/delete' from './endpoints/notes/favorites/delete.js';
 export * as 'notes/featured' from './endpoints/notes/featured.js';
diff --git a/packages/backend/src/server/api/endpoints/notes/drafts/count.ts b/packages/backend/src/server/api/endpoints/notes/drafts/count.ts
new file mode 100644
index 0000000000..002a545d32
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/drafts/count.ts
@@ -0,0 +1,51 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import type { NoteDraftsRepository } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
+
+export const meta = {
+	tags: ['notes', 'drafts'],
+
+	requireCredential: true,
+
+	prohibitMoved: true,
+
+	kind: 'read:account',
+
+	res: {
+		type: 'number',
+		optional: false, nullable: false,
+		description: 'The number of drafts',
+	},
+
+	errors: {
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+	},
+	required: [],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		@Inject(DI.noteDraftsRepository)
+		private noteDraftsRepository: NoteDraftsRepository,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const count = await this.noteDraftsRepository.createQueryBuilder('drafts')
+				.where('drafts.userId = :meId', { meId: me.id })
+				.getCount();
+
+			return count;
+		});
+	}
+}
diff --git a/packages/backend/src/server/api/endpoints/notes/drafts/create.ts b/packages/backend/src/server/api/endpoints/notes/drafts/create.ts
new file mode 100644
index 0000000000..1c28ec22d0
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/drafts/create.ts
@@ -0,0 +1,258 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable } from '@nestjs/common';
+import ms from 'ms';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { NoteDraftService } from '@/core/NoteDraftService.js';
+import { MAX_NOTE_TEXT_LENGTH } from '@/const.js';
+import { ApiError } from '@/server/api/error.js';
+import { NoteDraftEntityService } from '@/core/entities/NoteDraftEntityService.js';
+import { IdentifiableError } from '@/misc/identifiable-error.js';
+
+export const meta = {
+	tags: ['notes', 'drafts'],
+
+	requireCredential: true,
+
+	prohibitMoved: true,
+
+	kind: 'write:account',
+
+	res: {
+		type: 'object',
+		optional: false, nullable: false,
+		properties: {
+			createdDraft: {
+				type: 'object',
+				optional: false, nullable: false,
+				ref: 'NoteDraft',
+			},
+		},
+	},
+
+	errors: {
+		noSuchRenoteTarget: {
+			message: 'No such renote target.',
+			code: 'NO_SUCH_RENOTE_TARGET',
+			id: 'b5c90186-4ab0-49c8-9bba-a1f76c282ba4',
+		},
+
+		cannotReRenote: {
+			message: 'You can not Renote a pure Renote.',
+			code: 'CANNOT_RENOTE_TO_A_PURE_RENOTE',
+			id: 'fd4cc33e-2a37-48dd-99cc-9b806eb2031a',
+		},
+
+		cannotRenoteDueToVisibility: {
+			message: 'You can not Renote due to target visibility.',
+			code: 'CANNOT_RENOTE_DUE_TO_VISIBILITY',
+			id: 'be9529e9-fe72-4de0-ae43-0b363c4938af',
+		},
+
+		noSuchReplyTarget: {
+			message: 'No such reply target.',
+			code: 'NO_SUCH_REPLY_TARGET',
+			id: '749ee0f6-d3da-459a-bf02-282e2da4292c',
+		},
+
+		cannotReplyToInvisibleNote: {
+			message: 'You cannot reply to an invisible Note.',
+			code: 'CANNOT_REPLY_TO_AN_INVISIBLE_NOTE',
+			id: 'b98980fa-3780-406c-a935-b6d0eeee10d1',
+		},
+
+		cannotReplyToPureRenote: {
+			message: 'You can not reply to a pure Renote.',
+			code: 'CANNOT_REPLY_TO_A_PURE_RENOTE',
+			id: '3ac74a84-8fd5-4bb0-870f-01804f82ce15',
+		},
+
+		cannotReplyToSpecifiedVisibilityNoteWithExtendedVisibility: {
+			message: 'You cannot reply to a specified visibility note with extended visibility.',
+			code: 'CANNOT_REPLY_TO_SPECIFIED_VISIBILITY_NOTE_WITH_EXTENDED_VISIBILITY',
+			id: 'ed940410-535c-4d5e-bfa3-af798671e93c',
+		},
+
+		cannotCreateAlreadyExpiredPoll: {
+			message: 'Poll is already expired.',
+			code: 'CANNOT_CREATE_ALREADY_EXPIRED_POLL',
+			id: '04da457d-b083-4055-9082-955525eda5a5',
+		},
+
+		noSuchChannel: {
+			message: 'No such channel.',
+			code: 'NO_SUCH_CHANNEL',
+			id: 'b1653923-5453-4edc-b786-7c4f39bb0bbb',
+		},
+
+		youHaveBeenBlocked: {
+			message: 'You have been blocked by this user.',
+			code: 'YOU_HAVE_BEEN_BLOCKED',
+			id: 'b390d7e1-8a5e-46ed-b625-06271cafd3d3',
+		},
+
+		noSuchFile: {
+			message: 'Some files are not found.',
+			code: 'NO_SUCH_FILE',
+			id: 'b6992544-63e7-67f0-fa7f-32444b1b5306',
+		},
+
+		cannotRenoteOutsideOfChannel: {
+			message: 'Cannot renote outside of channel.',
+			code: 'CANNOT_RENOTE_OUTSIDE_OF_CHANNEL',
+			id: '33510210-8452-094c-6227-4a6c05d99f00',
+		},
+
+		containsProhibitedWords: {
+			message: 'Cannot post because it contains prohibited words.',
+			code: 'CONTAINS_PROHIBITED_WORDS',
+			id: 'aa6e01d3-a85c-669d-758a-76aab43af334',
+		},
+
+		containsTooManyMentions: {
+			message: 'Cannot post because it exceeds the allowed number of mentions.',
+			code: 'CONTAINS_TOO_MANY_MENTIONS',
+			id: '4de0363a-3046-481b-9b0f-feff3e211025',
+		},
+
+		tooManyDrafts: {
+			message: 'You cannot create drafts any more.',
+			code: 'TOO_MANY_DRAFTS',
+			id: '9ee33bbe-fde3-4c71-9b51-e50492c6b9c8',
+		},
+
+		cannotRenoteToExternal: {
+			message: 'Cannot Renote to External.',
+			code: 'CANNOT_RENOTE_TO_EXTERNAL',
+			id: 'ed1952ac-2d26-4957-8b30-2deda76bedf7',
+		},
+	},
+
+	limit: {
+		duration: ms('1hour'),
+		max: 300,
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		visibility: { type: 'string', enum: ['public', 'home', 'followers', 'specified'], default: 'public' },
+		visibleUserIds: { type: 'array', uniqueItems: true, items: {
+			type: 'string', format: 'misskey:id',
+		} },
+		cw: { type: 'string', nullable: true, minLength: 1, maxLength: 100 },
+		hashtag: { type: 'string', nullable: true, maxLength: 200 },
+		localOnly: { type: 'boolean', default: false },
+		reactionAcceptance: { type: 'string', nullable: true, enum: [null, 'likeOnly', 'likeOnlyForRemote', 'nonSensitiveOnly', 'nonSensitiveOnlyForLocalLikeOnlyForRemote'], default: null },
+		replyId: { type: 'string', format: 'misskey:id', nullable: true },
+		renoteId: { type: 'string', format: 'misskey:id', nullable: true },
+		channelId: { type: 'string', format: 'misskey:id', nullable: true },
+
+		// anyOf内にバリデーションを書いても最初の一つしかチェックされない
+		text: {
+			type: 'string',
+			minLength: 0,
+			maxLength: MAX_NOTE_TEXT_LENGTH,
+			nullable: true,
+		},
+		fileIds: {
+			type: 'array',
+			uniqueItems: true,
+			minItems: 1,
+			maxItems: 16,
+			items: { type: 'string', format: 'misskey:id' },
+		},
+		poll: {
+			type: 'object',
+			nullable: true,
+			properties: {
+				choices: {
+					type: 'array',
+					uniqueItems: true,
+					minItems: 0,
+					maxItems: 10,
+					items: { type: 'string', minLength: 1, maxLength: 50 },
+				},
+				multiple: { type: 'boolean' },
+				expiresAt: { type: 'integer', nullable: true },
+				expiredAfter: { type: 'integer', nullable: true, minimum: 1 },
+			},
+			required: ['choices'],
+		},
+	},
+	required: [],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		private noteDraftService: NoteDraftService,
+		private noteDraftEntityService: NoteDraftEntityService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const draft = await this.noteDraftService.create(me, {
+				fileIds: ps.fileIds,
+				poll: ps.poll ? {
+					choices: ps.poll.choices,
+					multiple: ps.poll.multiple ?? false,
+					expiresAt: ps.poll.expiresAt ? new Date(ps.poll.expiresAt) : null,
+					expiredAfter: ps.poll.expiredAfter ?? null,
+				} : undefined,
+				text: ps.text ?? null,
+				replyId: ps.replyId ?? undefined,
+				renoteId: ps.renoteId ?? undefined,
+				cw: ps.cw ?? null,
+				...(ps.hashtag ? { hashtag: ps.hashtag } : {}),
+				localOnly: ps.localOnly,
+				reactionAcceptance: ps.reactionAcceptance,
+				visibility: ps.visibility,
+				visibleUserIds: ps.visibleUserIds ?? [],
+				channelId: ps.channelId ?? undefined,
+			}).catch((err) => {
+				if (err instanceof IdentifiableError) {
+					switch (err.id) {
+						case '9ee33bbe-fde3-4c71-9b51-e50492c6b9c8':
+							throw new ApiError(meta.errors.tooManyDrafts);
+						case '04da457d-b083-4055-9082-955525eda5a5':
+							throw new ApiError(meta.errors.cannotCreateAlreadyExpiredPoll);
+						case 'b6992544-63e7-67f0-fa7f-32444b1b5306':
+							throw new ApiError(meta.errors.noSuchFile);
+						case '64929870-2540-4d11-af41-3b484d78c956':
+							throw new ApiError(meta.errors.noSuchRenoteTarget);
+						case '76cc5583-5a14-4ad3-8717-0298507e32db':
+							throw new ApiError(meta.errors.cannotReRenote);
+						case '075ca298-e6e7-485a-b570-51a128bb5168':
+							throw new ApiError(meta.errors.youHaveBeenBlocked);
+						case '81eb8188-aea1-4e35-9a8f-3334a3be9855':
+							throw new ApiError(meta.errors.cannotRenoteDueToVisibility);
+						case '6815399a-6f13-4069-b60d-ed5156249d12':
+							throw new ApiError(meta.errors.noSuchChannel);
+						case 'ed1952ac-2d26-4957-8b30-2deda76bedf7':
+							throw new ApiError(meta.errors.cannotRenoteToExternal);
+						case 'c4721841-22fc-4bb7-ad3d-897ef1d375b5':
+							throw new ApiError(meta.errors.noSuchReplyTarget);
+						case 'e6c10b57-2c09-4da3-bd4d-eda05d51d140':
+							throw new ApiError(meta.errors.cannotReplyToPureRenote);
+						case '593c323c-6b6a-4501-a25c-2f36bd2a93d6':
+							throw new ApiError(meta.errors.cannotReplyToInvisibleNote);
+						case '215dbc76-336c-4d2a-9605-95766ba7dab0':
+							throw new ApiError(meta.errors.cannotReplyToSpecifiedVisibilityNoteWithExtendedVisibility);
+						default:
+							throw err;
+					}
+				}
+				throw err;
+			});
+
+			const createdDraft = await this.noteDraftEntityService.pack(draft, me);
+
+			return {
+				createdDraft,
+			};
+		});
+	}
+}
diff --git a/packages/backend/src/server/api/endpoints/notes/drafts/delete.ts b/packages/backend/src/server/api/endpoints/notes/drafts/delete.ts
new file mode 100644
index 0000000000..6c41145c18
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/drafts/delete.ts
@@ -0,0 +1,61 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable } from '@nestjs/common';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { NoteDraftService } from '@/core/NoteDraftService.js';
+import { ApiError } from '../../../error.js';
+
+export const meta = {
+	tags: ['notes', 'drafts'],
+
+	requireCredential: true,
+
+	prohibitMoved: true,
+
+	kind: 'write:account',
+
+	errors: {
+		noSuchNoteDraft: {
+			message: 'No such note draft.',
+			code: 'NO_SUCH_NOTE_DRAFT',
+			id: '49cd6b9d-848e-41ee-b0b9-adaca711a6b1',
+		},
+
+		accessDenied: {
+			message: 'Access denied.',
+			code: 'ACCESS_DENIED',
+			id: '56f35758-7dd5-468b-8439-5d6fb8ec9b8e',
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		draftId: { type: 'string', nullable: false, format: 'misskey:id' },
+	},
+	required: ['draftId'],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		private noteDraftService: NoteDraftService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const draft = await this.noteDraftService.get(me, ps.draftId);
+			if (draft == null) {
+				throw new ApiError(meta.errors.noSuchNoteDraft);
+			}
+
+			if (draft.userId !== me.id) {
+				throw new ApiError(meta.errors.accessDenied);
+			}
+
+			await this.noteDraftService.delete(me, draft.id);
+		});
+	}
+}
diff --git a/packages/backend/src/server/api/endpoints/notes/drafts/list.ts b/packages/backend/src/server/api/endpoints/notes/drafts/list.ts
new file mode 100644
index 0000000000..1834585aeb
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/drafts/list.ts
@@ -0,0 +1,66 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import type { MiNoteDraft, NoteDraftsRepository } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
+import { QueryService } from '@/core/QueryService.js';
+import { NoteDraftEntityService } from '@/core/entities/NoteDraftEntityService.js';
+
+export const meta = {
+	tags: ['notes', 'drafts'],
+
+	requireCredential: true,
+
+	prohibitMoved: true,
+
+	kind: 'read:account',
+
+	res: {
+		type: 'array',
+		optional: false, nullable: false,
+		items: {
+			type: 'object',
+			optional: false, nullable: false,
+			ref: 'NoteDraft',
+		},
+	},
+
+	errors: {
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		limit: { type: 'integer', minimum: 1, maximum: 100, default: 30 },
+		sinceId: { type: 'string', format: 'misskey:id' },
+		untilId: { type: 'string', format: 'misskey:id' },
+	},
+	required: [],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		@Inject(DI.noteDraftsRepository)
+		private noteDraftsRepository: NoteDraftsRepository,
+
+		private queryService: QueryService,
+		private noteDraftEntityService: NoteDraftEntityService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const query = this.queryService.makePaginationQuery<MiNoteDraft>(this.noteDraftsRepository.createQueryBuilder('drafts'), ps.sinceId, ps.untilId)
+				.andWhere('drafts.userId = :meId', { meId: me.id });
+
+			const drafts = await query
+				.limit(ps.limit)
+				.getMany();
+
+			return await this.noteDraftEntityService.packMany(drafts, me);
+		});
+	}
+}
diff --git a/packages/backend/src/server/api/endpoints/notes/drafts/update.ts b/packages/backend/src/server/api/endpoints/notes/drafts/update.ts
new file mode 100644
index 0000000000..ee221fb765
--- /dev/null
+++ b/packages/backend/src/server/api/endpoints/notes/drafts/update.ts
@@ -0,0 +1,302 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable } from '@nestjs/common';
+import ms from 'ms';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { NoteDraftService } from '@/core/NoteDraftService.js';
+import { MAX_NOTE_TEXT_LENGTH } from '@/const.js';
+import { NoteDraftEntityService } from '@/core/entities/NoteDraftEntityService.js';
+import { IdentifiableError } from '@/misc/identifiable-error.js';
+import { ApiError } from '../../../error.js';
+
+export const meta = {
+	tags: ['notes', 'drafts'],
+
+	requireCredential: true,
+
+	prohibitMoved: true,
+
+	kind: 'write:account',
+
+	res: {
+		type: 'object',
+		optional: false, nullable: false,
+		properties: {
+			updatedDraft: {
+				type: 'object',
+				optional: false, nullable: false,
+				ref: 'NoteDraft',
+			},
+		},
+	},
+
+	errors: {
+		noSuchRenoteTarget: {
+			message: 'No such renote target.',
+			code: 'NO_SUCH_RENOTE_TARGET',
+			id: 'b5c90186-4ab0-49c8-9bba-a1f76c282ba4',
+		},
+
+		cannotReRenote: {
+			message: 'You can not Renote a pure Renote.',
+			code: 'CANNOT_RENOTE_TO_A_PURE_RENOTE',
+			id: 'fd4cc33e-2a37-48dd-99cc-9b806eb2031a',
+		},
+
+		cannotRenoteDueToVisibility: {
+			message: 'You can not Renote due to target visibility.',
+			code: 'CANNOT_RENOTE_DUE_TO_VISIBILITY',
+			id: 'be9529e9-fe72-4de0-ae43-0b363c4938af',
+		},
+
+		noSuchReplyTarget: {
+			message: 'No such reply target.',
+			code: 'NO_SUCH_REPLY_TARGET',
+			id: '749ee0f6-d3da-459a-bf02-282e2da4292c',
+		},
+
+		cannotReplyToInvisibleNote: {
+			message: 'You cannot reply to an invisible Note.',
+			code: 'CANNOT_REPLY_TO_AN_INVISIBLE_NOTE',
+			id: 'b98980fa-3780-406c-a935-b6d0eeee10d1',
+		},
+
+		cannotReplyToPureRenote: {
+			message: 'You can not reply to a pure Renote.',
+			code: 'CANNOT_REPLY_TO_A_PURE_RENOTE',
+			id: '3ac74a84-8fd5-4bb0-870f-01804f82ce15',
+		},
+
+		cannotReplyToSpecifiedNoteWithExtendedVisibility: {
+			message: 'You cannot reply to a specified visibility note with extended visibility.',
+			code: 'CANNOT_REPLY_TO_SPECIFIED_NOTE_WITH_EXTENDED_VISIBILITY',
+			id: 'ed940410-535c-4d5e-bfa3-af798671e93c',
+		},
+
+		cannotCreateAlreadyExpiredPoll: {
+			message: 'Poll is already expired.',
+			code: 'CANNOT_CREATE_ALREADY_EXPIRED_POLL',
+			id: '04da457d-b083-4055-9082-955525eda5a5',
+		},
+
+		noSuchChannel: {
+			message: 'No such channel.',
+			code: 'NO_SUCH_CHANNEL',
+			id: 'b1653923-5453-4edc-b786-7c4f39bb0bbb',
+		},
+
+		youHaveBeenBlocked: {
+			message: 'You have been blocked by this user.',
+			code: 'YOU_HAVE_BEEN_BLOCKED',
+			id: 'b390d7e1-8a5e-46ed-b625-06271cafd3d3',
+		},
+
+		noSuchFile: {
+			message: 'Some files are not found.',
+			code: 'NO_SUCH_FILE',
+			id: 'b6992544-63e7-67f0-fa7f-32444b1b5306',
+		},
+
+		cannotRenoteOutsideOfChannel: {
+			message: 'Cannot renote outside of channel.',
+			code: 'CANNOT_RENOTE_OUTSIDE_OF_CHANNEL',
+			id: '33510210-8452-094c-6227-4a6c05d99f00',
+		},
+
+		containsProhibitedWords: {
+			message: 'Cannot post because it contains prohibited words.',
+			code: 'CONTAINS_PROHIBITED_WORDS',
+			id: 'aa6e01d3-a85c-669d-758a-76aab43af334',
+		},
+
+		containsTooManyMentions: {
+			message: 'Cannot post because it exceeds the allowed number of mentions.',
+			code: 'CONTAINS_TOO_MANY_MENTIONS',
+			id: '4de0363a-3046-481b-9b0f-feff3e211025',
+		},
+
+		noSuchNoteDraft: {
+			message: 'No such note draft.',
+			code: 'NO_SUCH_NOTE_DRAFT',
+			id: '49cd6b9d-848e-41ee-b0b9-adaca711a6b1',
+		},
+
+		accessDenied: {
+			message: 'Access denied.',
+			code: 'ACCESS_DENIED',
+			id: '56f35758-7dd5-468b-8439-5d6fb8ec9b8e',
+		},
+
+		noSuchRenote: {
+			message: 'No such renote.',
+			code: 'NO_SUCH_RENOTE',
+			id: '64929870-2540-4d11-af41-3b484d78c956',
+		},
+
+		cannotRenote: {
+			message: 'Cannot renote.',
+			code: 'CANNOT_RENOTE',
+			id: '76cc5583-5a14-4ad3-8717-0298507e32db',
+		},
+
+		cannotRenoteToExternal: {
+			message: 'Cannot Renote to External.',
+			code: 'CANNOT_RENOTE_TO_EXTERNAL',
+			id: 'ed1952ac-2d26-4957-8b30-2deda76bedf7',
+		},
+
+		noSuchReply: {
+			message: 'No such reply.',
+			code: 'NO_SUCH_REPLY',
+			id: 'c4721841-22fc-4bb7-ad3d-897ef1d375b5',
+		},
+
+		cannotReplyToSpecifiedVisibilityNoteWithExtendedVisibility: {
+			message: 'You cannot reply to a specified visibility note with extended visibility.',
+			code: 'CANNOT_REPLY_TO_SPECIFIED_VISIBILITY_NOTE_WITH_EXTENDED_VISIBILITY',
+			id: '215dbc76-336c-4d2a-9605-95766ba7dab0',
+		},
+	},
+
+	limit: {
+		duration: ms('1hour'),
+		max: 300,
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		draftId: { type: 'string', nullable: false, format: 'misskey:id' },
+		visibility: { type: 'string', enum: ['public', 'home', 'followers', 'specified'], default: 'public' },
+		visibleUserIds: { type: 'array', uniqueItems: true, items: {
+			type: 'string', format: 'misskey:id',
+		} },
+		cw: { type: 'string', nullable: true, minLength: 1, maxLength: 100 },
+		hashtag: { type: 'string', nullable: true, maxLength: 200 },
+		localOnly: { type: 'boolean', default: false },
+		reactionAcceptance: { type: 'string', nullable: true, enum: [null, 'likeOnly', 'likeOnlyForRemote', 'nonSensitiveOnly', 'nonSensitiveOnlyForLocalLikeOnlyForRemote'], default: null },
+		replyId: { type: 'string', format: 'misskey:id', nullable: true },
+		renoteId: { type: 'string', format: 'misskey:id', nullable: true },
+		channelId: { type: 'string', format: 'misskey:id', nullable: true },
+
+		// anyOf内にバリデーションを書いても最初の一つしかチェックされない
+		// See https://github.com/misskey-dev/misskey/pull/10082
+		text: {
+			type: 'string',
+			minLength: 0,
+			maxLength: MAX_NOTE_TEXT_LENGTH,
+			nullable: true,
+		},
+		fileIds: {
+			type: 'array',
+			uniqueItems: true,
+			minItems: 1,
+			maxItems: 16,
+			items: { type: 'string', format: 'misskey:id' },
+		},
+		poll: {
+			type: 'object',
+			nullable: true,
+			properties: {
+				choices: {
+					type: 'array',
+					uniqueItems: true,
+					minItems: 0,
+					maxItems: 10,
+					items: { type: 'string', minLength: 1, maxLength: 50 },
+				},
+				multiple: { type: 'boolean' },
+				expiresAt: { type: 'integer', nullable: true },
+				expiredAfter: { type: 'integer', nullable: true, minimum: 1 },
+			},
+			required: ['choices'],
+		},
+	},
+	required: ['draftId'],
+} as const;
+
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
+	constructor(
+		private noteDraftService: NoteDraftService,
+		private noteDraftEntityService: NoteDraftEntityService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const draft = await this.noteDraftService.update(me, ps.draftId, {
+				fileIds: ps.fileIds,
+				poll: ps.poll ? {
+					choices: ps.poll.choices,
+					multiple: ps.poll.multiple ?? false,
+					expiresAt: ps.poll.expiresAt ? new Date(ps.poll.expiresAt) : null,
+					expiredAfter: ps.poll.expiredAfter ?? null,
+				} : undefined,
+				text: ps.text ?? null,
+				replyId: ps.replyId ?? undefined,
+				renoteId: ps.renoteId ?? undefined,
+				cw: ps.cw ?? null,
+				...(ps.hashtag ? { hashtag: ps.hashtag } : {}),
+				localOnly: ps.localOnly,
+				reactionAcceptance: ps.reactionAcceptance,
+				visibility: ps.visibility,
+				visibleUserIds: ps.visibleUserIds ?? [],
+				channelId: ps.channelId ?? undefined,
+			}).catch((err) => {
+				if (err instanceof IdentifiableError) {
+					switch (err.id) {
+						case '49cd6b9d-848e-41ee-b0b9-adaca711a6b1':
+							throw new ApiError(meta.errors.noSuchNoteDraft);
+						case '04da457d-b083-4055-9082-955525eda5a5':
+							throw new ApiError(meta.errors.cannotCreateAlreadyExpiredPoll);
+						case 'b6992544-63e7-67f0-fa7f-32444b1b5306':
+							throw new ApiError(meta.errors.noSuchFile);
+						case '64929870-2540-4d11-af41-3b484d78c956':
+							throw new ApiError(meta.errors.noSuchRenote);
+						case '76cc5583-5a14-4ad3-8717-0298507e32db':
+							throw new ApiError(meta.errors.cannotRenote);
+						case '075ca298-e6e7-485a-b570-51a128bb5168':
+							throw new ApiError(meta.errors.youHaveBeenBlocked);
+						case '81eb8188-aea1-4e35-9a8f-3334a3be9855':
+							throw new ApiError(meta.errors.cannotRenoteDueToVisibility);
+						case '6815399a-6f13-4069-b60d-ed5156249d12':
+							throw new ApiError(meta.errors.noSuchChannel);
+						case 'ed1952ac-2d26-4957-8b30-2deda76bedf7':
+							throw new ApiError(meta.errors.cannotRenoteToExternal);
+						case 'c4721841-22fc-4bb7-ad3d-897ef1d375b5':
+							throw new ApiError(meta.errors.noSuchReply);
+						case 'e6c10b57-2c09-4da3-bd4d-eda05d51d140':
+							throw new ApiError(meta.errors.cannotReplyToPureRenote);
+						case '593c323c-6b6a-4501-a25c-2f36bd2a93d6':
+							throw new ApiError(meta.errors.cannotReplyToInvisibleNote);
+						case '215dbc76-336c-4d2a-9605-95766ba7dab0':
+							throw new ApiError(meta.errors.cannotReplyToSpecifiedNoteWithExtendedVisibility);
+						case 'b5c90186-4ab0-49c8-9bba-a1f76c282ba4':
+							throw new ApiError(meta.errors.noSuchRenoteTarget);
+						case 'fd4cc33e-2a37-48dd-99cc-9b806eb2031a':
+							throw new ApiError(meta.errors.cannotReRenote);
+						case '749ee0f6-d3da-459a-bf02-282e2da4292c':
+							throw new ApiError(meta.errors.noSuchReplyTarget);
+						case '33510210-8452-094c-6227-4a6c05d99f00':
+							throw new ApiError(meta.errors.cannotRenoteOutsideOfChannel);
+						case 'aa6e01d3-a85c-669d-758a-76aab43af334':
+							throw new ApiError(meta.errors.containsProhibitedWords);
+						case '4de0363a-3046-481b-9b0f-feff3e211025':
+							throw new ApiError(meta.errors.containsTooManyMentions);
+						default:
+							throw err;
+					}
+				}
+				throw err;
+			});
+
+			const updatedDraft = await this.noteDraftEntityService.pack(draft, me);
+
+			return {
+				updatedDraft,
+			};
+		});
+	}
+}
diff --git a/packages/backend/src/types.ts b/packages/backend/src/types.ts
index 5d5f1e3b71..b20f2a2179 100644
--- a/packages/backend/src/types.ts
+++ b/packages/backend/src/types.ts
@@ -54,6 +54,8 @@ export const obsoleteNotificationTypes = ['pollVote', 'groupInvited'] as const;
 
 export const noteVisibilities = ['public', 'home', 'followers', 'specified'] as const;
 
+export const noteReactionAcceptances = ['likeOnly', 'likeOnlyForRemote', 'nonSensitiveOnly', 'nonSensitiveOnlyForLocalLikeOnlyForRemote', null] as const;
+
 export const mutedNoteReasons = ['word', 'manual', 'spam', 'other'] as const;
 
 export const followingVisibilities = ['public', 'followers', 'private'] as const;
diff --git a/packages/frontend-shared/js/const.ts b/packages/frontend-shared/js/const.ts
index c4c4a25d74..4498a5e2b2 100644
--- a/packages/frontend-shared/js/const.ts
+++ b/packages/frontend-shared/js/const.ts
@@ -111,6 +111,7 @@ export const ROLE_POLICIES = [
 	'canImportUserLists',
 	'chatAvailability',
 	'uploadableFileTypes',
+	'noteDraftLimit',
 ] as const;
 
 export const MFM_TAGS = ['tada', 'jelly', 'twitch', 'shake', 'spin', 'jump', 'bounce', 'flip', 'x2', 'x3', 'x4', 'scale', 'position', 'fg', 'bg', 'border', 'font', 'blur', 'rainbow', 'sparkle', 'rotate', 'ruby', 'unixtime'];
diff --git a/packages/frontend/src/components/MkNoteDraftsDialog.vue b/packages/frontend/src/components/MkNoteDraftsDialog.vue
new file mode 100644
index 0000000000..b4aff8d16f
--- /dev/null
+++ b/packages/frontend/src/components/MkNoteDraftsDialog.vue
@@ -0,0 +1,218 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<MkModalWindow
+	ref="dialogEl"
+	:width="600"
+	:height="650"
+	:withOkButton="false"
+	@click="cancel()"
+	@close="cancel()"
+	@closed="emit('closed')"
+	@esc="cancel()"
+>
+	<template #header>
+		{{ i18n.ts.drafts }} ({{ currentDraftsCount }}/{{ $i?.policies.noteDraftLimit }})
+	</template>
+	<div :class="$style.drafts" class="_gaps">
+		<MkPagination ref="pagingEl" :pagination="paging">
+			<template #empty>
+				<MkResult type="empty" :text="i18n.ts._drafts.noDrafts"/>
+			</template>
+
+			<template #default="{ items }">
+				<div class="_spacer _gaps_s">
+					<div
+						v-for="draft in (items as unknown as Misskey.entities.NoteDraft[])"
+						:key="draft.id"
+						v-panel
+						:class="[$style.draft]"
+					>
+						<div :class="$style.draftBody" class="_gaps_s">
+							<div :class="$style.draftInfo">
+								<div :class="$style.draftMeta">
+									<div v-if="draft.reply" class="_nowrap">
+										<i class="ti ti-arrow-back-up"></i> <I18n :src="i18n.ts._drafts.replyTo" tag="span">
+											<template #user>
+												<Mfm v-if="draft.reply.user.name != null" :text="draft.reply.user.name" :plain="true" :nowrap="true"/>
+												<MkAcct v-else :user="draft.reply.user"/>
+											</template>
+										</I18n>
+									</div>
+									<div v-if="draft.renote && draft.text != null" class="_nowrap">
+										<i class="ti ti-quote"></i> <I18n :src="i18n.ts._drafts.quoteOf" tag="span">
+											<template #user>
+												<Mfm v-if="draft.renote.user.name != null" :text="draft.renote.user.name" :plain="true" :nowrap="true"/>
+												<MkAcct v-else :user="draft.renote.user"/>
+											</template>
+										</I18n>
+									</div>
+									<div v-if="draft.channel" class="_nowrap">
+										<i class="ti ti-device-tv"></i> {{ i18n.tsx._drafts.postTo({ channel: draft.channel.name }) }}
+									</div>
+								</div>
+							</div>
+							<div :class="$style.draftContent">
+								<Mfm :text="getNoteSummary(draft, { showRenote: false, showReply: false })" :plain="true" :author="draft.user"/>
+							</div>
+							<div :class="$style.draftFooter">
+								<div :class="$style.draftVisibility">
+									<span :title="i18n.ts._visibility[draft.visibility]">
+										<i v-if="draft.visibility === 'public'" class="ti ti-world"></i>
+										<i v-else-if="draft.visibility === 'home'" class="ti ti-home"></i>
+										<i v-else-if="draft.visibility === 'followers'" class="ti ti-lock"></i>
+										<i v-else-if="draft.visibility === 'specified'" class="ti ti-mail"></i>
+									</span>
+									<span v-if="draft.localOnly" :title="i18n.ts._visibility['disableFederation']"><i class="ti ti-rocket-off"></i></span>
+								</div>
+								<MkTime :time="draft.createdAt" :class="$style.draftCreatedAt" mode="detail" colored/>
+							</div>
+						</div>
+						<div :class="$style.draftActions" class="_buttons">
+							<MkButton
+								:class="$style.itemButton"
+								small
+								@click="restoreDraft(draft)"
+							>
+								<i class="ti ti-corner-up-left"></i>
+								{{ i18n.ts._drafts.restore }}
+							</MkButton>
+							<MkButton
+								v-tooltip="i18n.ts._drafts.delete"
+								danger
+								small
+								:iconOnly="true"
+								:class="$style.itemButton"
+								@click="deleteDraft(draft)"
+							>
+								<i class="ti ti-trash"></i>
+							</MkButton>
+						</div>
+					</div>
+				</div>
+			</template>
+		</MkPagination>
+	</div>
+</MkModalWindow>
+</template>
+
+<script lang="ts" setup>
+import { ref, shallowRef, useTemplateRef } from 'vue';
+import * as Misskey from 'misskey-js';
+import type { PagingCtx } from '@/composables/use-pagination.js';
+import MkButton from '@/components/MkButton.vue';
+import MkPagination from '@/components/MkPagination.vue';
+import MkModalWindow from '@/components/MkModalWindow.vue';
+import { getNoteSummary } from '@/utility/get-note-summary.js';
+import { i18n } from '@/i18n.js';
+import * as os from '@/os.js';
+import { $i } from '@/i.js';
+import { misskeyApi } from '@/utility/misskey-api';
+
+const emit = defineEmits<{
+	(ev: 'restore', draft: Misskey.entities.NoteDraft): void;
+	(ev: 'cancel'): void;
+	(ev: 'closed'): void;
+}>();
+
+const paging = {
+	endpoint: 'notes/drafts/list',
+	limit: 10,
+} satisfies PagingCtx;
+
+const pagingComponent = useTemplateRef('pagingEl');
+
+const currentDraftsCount = ref(0);
+misskeyApi('notes/drafts/count').then((count) => {
+	currentDraftsCount.value = count;
+});
+
+const dialogEl = shallowRef<InstanceType<typeof MkModalWindow>>();
+
+function cancel() {
+	emit('cancel');
+	dialogEl.value?.close();
+}
+
+function restoreDraft(draft: Misskey.entities.NoteDraft) {
+	emit('restore', draft);
+	dialogEl.value?.close();
+}
+
+async function deleteDraft(draft: Misskey.entities.NoteDraft) {
+	const { canceled } = await os.confirm({
+		type: 'warning',
+		text: i18n.ts._drafts.deleteAreYouSure,
+	});
+
+	if (canceled) return;
+
+	os.apiWithDialog('notes/drafts/delete', { draftId: draft.id }).then(() => {
+		pagingComponent.value?.paginator.reload();
+	});
+}
+</script>
+
+<style lang="scss" module>
+.drafts {
+	overflow-x: hidden;
+	overflow-x: clip;
+	overflow-y: auto;
+}
+
+.draft {
+	padding: 16px;
+	gap: 16px;
+	border-radius: 10px;
+}
+
+.draftBody {
+	width: 100%;
+	min-width: 0;
+}
+
+.draftInfo {
+	display: flex;
+	width: 100%;
+	font-size: 0.85em;
+	opacity: 0.7;
+}
+
+.draftMeta {
+	flex-grow: 1;
+	min-width: 0;
+}
+
+.draftContent {
+	display: -webkit-box;
+  -webkit-box-orient: vertical;
+  -webkit-line-clamp: 2;
+	line-clamp: 2;
+  overflow: hidden;
+	font-size: 0.9em;
+}
+
+.draftFooter {
+	display: flex;
+	align-items: center;
+	gap: 8px;
+}
+
+.draftVisibility {
+	flex-shrink: 0;
+}
+
+.draftCreatedAt {
+	font-size: 85%;
+	opacity: 0.7;
+}
+
+.draftActions {
+	margin-top: 16px;
+	padding-top: 16px;
+	border-top: solid 1px var(--MI_THEME-divider);
+}
+</style>
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index e319c9bacb..f8e163c581 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -17,10 +17,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<button v-click-anime v-tooltip="i18n.ts.switchAccount" :class="$style.account" class="_button" @click="openAccountMenu">
 				<MkAvatar :user="postAccount ?? $i" :class="$style.avatar"/>
 			</button>
+			<button v-if="$i.policies.noteDraftLimit > 0" v-tooltip="(postAccount != null && postAccount.id !== $i.id) ? null : i18n.ts.draft" class="_button" :class="$style.draftButton" :disabled="postAccount != null && postAccount.id !== $i.id" @click="showDraftMenu"><i class="ti ti-pencil-minus"></i></button>
 		</div>
 		<div :class="$style.headerRight">
-			<template v-if="!(channel != null && fixed)">
-				<button v-if="channel == null" ref="visibilityButton" v-tooltip="i18n.ts.visibility" :class="['_button', $style.headerRightItem, $style.visibility]" @click="setVisibility">
+			<template v-if="!(targetChannel != null && fixed)">
+				<button v-if="targetChannel == null" ref="visibilityButton" v-tooltip="i18n.ts.visibility" :class="['_button', $style.headerRightItem, $style.visibility]" @click="setVisibility">
 					<span v-if="visibility === 'public'"><i class="ti ti-world"></i></span>
 					<span v-if="visibility === 'home'"><i class="ti ti-home"></i></span>
 					<span v-if="visibility === 'followers'"><i class="ti ti-lock"></i></span>
@@ -29,10 +30,10 @@ SPDX-License-Identifier: AGPL-3.0-only
 				</button>
 				<button v-else class="_button" :class="[$style.headerRightItem, $style.visibility]" disabled>
 					<span><i class="ti ti-device-tv"></i></span>
-					<span :class="$style.headerRightButtonText">{{ channel.name }}</span>
+					<span :class="$style.headerRightButtonText">{{ targetChannel.name }}</span>
 				</button>
 			</template>
-			<button v-tooltip="i18n.ts._visibility.disableFederation" class="_button" :class="[$style.headerRightItem, { [$style.danger]: localOnly }]" :disabled="channel != null || visibility === 'specified'" @click="toggleLocalOnly">
+			<button v-tooltip="i18n.ts._visibility.disableFederation" class="_button" :class="[$style.headerRightItem, { [$style.danger]: localOnly }]" :disabled="targetChannel != null || visibility === 'specified'" @click="toggleLocalOnly">
 				<span v-if="!localOnly"><i class="ti ti-rocket"></i></span>
 				<span v-else><i class="ti ti-rocket-off"></i></span>
 			</button>
@@ -42,12 +43,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<template v-if="posted"></template>
 					<template v-else-if="posting"><MkEllipsis/></template>
 					<template v-else>{{ submitText }}</template>
-					<i style="margin-left: 6px;" :class="posted ? 'ti ti-check' : reply ? 'ti ti-arrow-back-up' : renoteTargetNote ? 'ti ti-quote' : 'ti ti-send'"></i>
+					<i style="margin-left: 6px;" :class="posted ? 'ti ti-check' : replyTargetNote ? 'ti ti-arrow-back-up' : renoteTargetNote ? 'ti ti-quote' : 'ti ti-send'"></i>
 				</div>
 			</button>
 		</div>
 	</header>
-	<MkNoteSimple v-if="reply" :class="$style.targetNote" :note="reply"/>
+	<MkNoteSimple v-if="replyTargetNote" :class="$style.targetNote" :note="replyTargetNote"/>
 	<MkNoteSimple v-if="renoteTargetNote" :class="$style.targetNote" :note="renoteTargetNote"/>
 	<div v-if="quoteId" :class="$style.withQuote"><i class="ti ti-quote"></i> {{ i18n.ts.quoteAttached }}<button @click="quoteId = null; renoteTargetNote = null;"><i class="ti ti-x"></i></button></div>
 	<div v-if="visibility === 'specified'" :class="$style.toSpecified">
@@ -66,7 +67,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<div v-if="maxCwTextLength - cwTextLength < 20" :class="['_acrylic', $style.cwTextCount, { [$style.cwTextOver]: cwTextLength > maxCwTextLength }]">{{ maxCwTextLength - cwTextLength }}</div>
 	</div>
 	<div :class="[$style.textOuter, { [$style.withCw]: useCw }]">
-		<div v-if="channel" :class="$style.colorBar" :style="{ background: channel.color }"></div>
+		<div v-if="targetChannel" :class="$style.colorBar" :style="{ background: targetChannel.color }"></div>
 		<textarea ref="textareaEl" v-model="text" :class="[$style.text]" :disabled="posting || posted" :readonly="textAreaReadOnly" :placeholder="placeholder" data-cy-post-form-text @keydown="onKeydown" @keyup="onKeyup" @paste="onPaste" @compositionupdate="onCompositionUpdate" @compositionend="onCompositionEnd"/>
 		<div v-if="maxTextLength - textLength < 100" :class="['_acrylic', $style.textCount, { [$style.textOver]: textLength > maxTextLength }]">{{ maxTextLength - textLength }}</div>
 	</div>
@@ -207,6 +208,10 @@ const showingOptions = ref(false);
 const textAreaReadOnly = ref(false);
 const justEndedComposition = ref(false);
 const renoteTargetNote: ShallowRef<PostFormProps['renote'] | null> = shallowRef(props.renote);
+const replyTargetNote: ShallowRef<PostFormProps['reply'] | null> = shallowRef(props.reply);
+const targetChannel = shallowRef(props.channel);
+
+const serverDraftId = ref<string | null>(null);
 const postFormActions = getPluginHandlers('post_form_action');
 
 const uploader = useUploader({
@@ -219,12 +224,12 @@ uploader.events.on('itemUploaded', ctx => {
 });
 
 const draftKey = computed((): string => {
-	let key = props.channel ? `channel:${props.channel.id}` : '';
+	let key = targetChannel.value ? `channel:${targetChannel.value.id}` : '';
 
 	if (renoteTargetNote.value) {
 		key += `renote:${renoteTargetNote.value.id}`;
-	} else if (props.reply) {
-		key += `reply:${props.reply.id}`;
+	} else if (replyTargetNote.value) {
+		key += `reply:${replyTargetNote.value.id}`;
 	} else {
 		key += `note:${$i.id}`;
 	}
@@ -235,9 +240,9 @@ const draftKey = computed((): string => {
 const placeholder = computed((): string => {
 	if (renoteTargetNote.value) {
 		return i18n.ts._postForm.quotePlaceholder;
-	} else if (props.reply) {
+	} else if (replyTargetNote.value) {
 		return i18n.ts._postForm.replyPlaceholder;
-	} else if (props.channel) {
+	} else if (targetChannel.value) {
 		return i18n.ts._postForm.channelPlaceholder;
 	} else {
 		const xs = [
@@ -255,7 +260,7 @@ const placeholder = computed((): string => {
 const submitText = computed((): string => {
 	return renoteTargetNote.value
 		? i18n.ts.quote
-		: props.reply
+		: replyTargetNote.value
 			? i18n.ts.reply
 			: i18n.ts.note;
 });
@@ -296,6 +301,11 @@ const canPost = computed((): boolean => {
 		(!poll.value || poll.value.choices.length >= 2);
 });
 
+// cannot save pure renote as draft
+const canSaveAsServerDraft = computed((): boolean => {
+	return canPost.value && (textLength.value > 0 || files.value.length > 0 || poll.value != null);
+});
+
 const withHashtags = computed(store.makeGetterSetter('postFormWithHashtags'));
 const hashtags = computed(store.makeGetterSetter('postFormHashtags'));
 
@@ -318,13 +328,13 @@ if (props.mention) {
 	text.value += ' ';
 }
 
-if (props.reply && (props.reply.user.username !== $i.username || (props.reply.user.host != null && props.reply.user.host !== host))) {
-	text.value = `@${props.reply.user.username}${props.reply.user.host != null ? '@' + toASCII(props.reply.user.host) : ''} `;
+if (replyTargetNote.value && (replyTargetNote.value.user.username !== $i.username || (replyTargetNote.value.user.host != null && replyTargetNote.value.user.host !== host))) {
+	text.value = `@${replyTargetNote.value.user.username}${replyTargetNote.value.user.host != null ? '@' + toASCII(replyTargetNote.value.user.host) : ''} `;
 }
 
-if (props.reply && props.reply.text != null) {
-	const ast = mfm.parse(props.reply.text);
-	const otherHost = props.reply.user.host;
+if (replyTargetNote.value && replyTargetNote.value.text != null) {
+	const ast = mfm.parse(replyTargetNote.value.text);
+	const otherHost = replyTargetNote.value.user.host;
 
 	for (const x of extractMentions(ast)) {
 		const mention = x.host ?
@@ -347,32 +357,32 @@ if ($i.isSilenced && visibility.value === 'public') {
 	visibility.value = 'home';
 }
 
-if (props.channel) {
+if (targetChannel.value) {
 	visibility.value = 'public';
 	localOnly.value = true; // TODO: チャンネルが連合するようになった折には消す
 }
 
 // 公開以外へのリプライ時は元の公開範囲を引き継ぐ
-if (props.reply && ['home', 'followers', 'specified'].includes(props.reply.visibility)) {
-	if (props.reply.visibility === 'home' && visibility.value === 'followers') {
+if (replyTargetNote.value && ['home', 'followers', 'specified'].includes(replyTargetNote.value.visibility)) {
+	if (replyTargetNote.value.visibility === 'home' && visibility.value === 'followers') {
 		visibility.value = 'followers';
-	} else if (['home', 'followers'].includes(props.reply.visibility) && visibility.value === 'specified') {
+	} else if (['home', 'followers'].includes(replyTargetNote.value.visibility) && visibility.value === 'specified') {
 		visibility.value = 'specified';
 	} else {
-		visibility.value = props.reply.visibility;
+		visibility.value = replyTargetNote.value.visibility;
 	}
 
 	if (visibility.value === 'specified') {
-		if (props.reply.visibleUserIds) {
+		if (replyTargetNote.value.visibleUserIds) {
 			misskeyApi('users/show', {
-				userIds: props.reply.visibleUserIds.filter(uid => uid !== $i.id && uid !== props.reply?.userId),
+				userIds: replyTargetNote.value.visibleUserIds.filter(uid => uid !== $i.id && uid !== replyTargetNote.value?.userId),
 			}).then(users => {
 				users.forEach(u => pushVisibleUser(u));
 			});
 		}
 
-		if (props.reply.userId !== $i.id) {
-			misskeyApi('users/show', { userId: props.reply.userId }).then(user => {
+		if (replyTargetNote.value.userId !== $i.id) {
+			misskeyApi('users/show', { userId: replyTargetNote.value.userId }).then(user => {
 				pushVisibleUser(user);
 			});
 		}
@@ -385,9 +395,9 @@ if (props.specified) {
 }
 
 // keep cw when reply
-if (prefer.s.keepCw && props.reply && props.reply.cw) {
+if (prefer.s.keepCw && replyTargetNote.value && replyTargetNote.value.cw) {
 	useCw.value = true;
-	cw.value = props.reply.cw;
+	cw.value = replyTargetNote.value.cw;
 }
 
 function watchForDraft() {
@@ -485,7 +495,7 @@ function updateFileName(file, name) {
 }
 
 function setVisibility() {
-	if (props.channel) {
+	if (targetChannel.value) {
 		visibility.value = 'public';
 		localOnly.value = true; // TODO: チャンネルが連合するようになった折には消す
 		return;
@@ -496,7 +506,7 @@ function setVisibility() {
 		isSilenced: $i.isSilenced,
 		localOnly: localOnly.value,
 		anchorElement: visibilityButton.value,
-		...(props.reply ? { isReplyVisibilitySpecified: props.reply.visibility === 'specified' } : {}),
+		...(replyTargetNote.value ? { isReplyVisibilitySpecified: replyTargetNote.value.visibility === 'specified' } : {}),
 	}, {
 		changeVisibility: v => {
 			visibility.value = v;
@@ -509,7 +519,7 @@ function setVisibility() {
 }
 
 async function toggleLocalOnly() {
-	if (props.channel) {
+	if (targetChannel.value) {
 		visibility.value = 'public';
 		localOnly.value = true; // TODO: チャンネルが連合するようになった折には消す
 		return;
@@ -798,7 +808,7 @@ function saveDraft() {
 			localOnly: localOnly.value,
 			files: files.value,
 			poll: poll.value,
-			visibleUserIds: visibility.value === 'specified' ? visibleUsers.value.map(x => x.id) : undefined,
+			...( visibleUsers.value.length > 0 ? { visibleUserIds: visibleUsers.value.map(x => x.id) } : {}),
 			quoteId: quoteId.value,
 			reactionAcceptance: reactionAcceptance.value,
 		},
@@ -815,6 +825,32 @@ function deleteDraft() {
 	miLocalStorage.setItem('drafts', JSON.stringify(draftData));
 }
 
+async function saveServerDraft(clearLocal = false) {
+	return await os.apiWithDialog(serverDraftId.value == null ? 'notes/drafts/create' : 'notes/drafts/update', {
+		...(serverDraftId.value == null ? {} : { draftId: serverDraftId.value }),
+		text: text.value,
+		useCw: useCw.value,
+		cw: cw.value,
+		visibility: visibility.value,
+		localOnly: localOnly.value,
+		hashtag: hashtags.value,
+		...(files.value.length > 0 ? { fileIds: files.value.map(f => f.id) } : {}),
+		poll: poll.value,
+		...(visibleUsers.value.length > 0 ? { visibleUserIds: visibleUsers.value.map(x => x.id) } : {}),
+		renoteId: renoteTargetNote.value ? renoteTargetNote.value.id : undefined,
+		replyId: replyTargetNote.value ? replyTargetNote.value.id : undefined,
+		quoteId: quoteId.value,
+		channelId: targetChannel.value ? targetChannel.value.id : undefined,
+		reactionAcceptance: reactionAcceptance.value,
+	}).then(() => {
+		if (clearLocal) {
+			clear();
+			deleteDraft();
+		}
+	}).catch((err) => {
+	});
+}
+
 function isAnnoying(text: string): boolean {
 	return text.includes('$[x2') ||
 		text.includes('$[x3') ||
@@ -882,9 +918,9 @@ async function post(ev?: MouseEvent) {
 	let postData = {
 		text: text.value === '' ? null : text.value,
 		fileIds: files.value.length > 0 ? files.value.map(f => f.id) : undefined,
-		replyId: props.reply ? props.reply.id : undefined,
+		replyId: replyTargetNote.value ? replyTargetNote.value.id : undefined,
 		renoteId: renoteTargetNote.value ? renoteTargetNote.value.id : quoteId.value ? quoteId.value : undefined,
-		channelId: props.channel ? props.channel.id : undefined,
+		channelId: targetChannel.value ? targetChannel.value.id : undefined,
 		poll: poll.value,
 		cw: useCw.value ? cw.value ?? '' : null,
 		localOnly: localOnly.value,
@@ -989,6 +1025,10 @@ async function post(ev?: MouseEvent) {
 			if (m === 0 && s === 0) {
 				claimAchievement('postedAt0min0sec');
 			}
+
+			if (serverDraftId.value != null) {
+				misskeyApi('notes/drafts/delete', { draftId: serverDraftId.value });
+			}
 		});
 	}).catch(err => {
 		posting.value = false;
@@ -1092,6 +1132,84 @@ function showPerUploadItemMenuViaContextmenu(item: UploaderItem, ev: MouseEvent)
 	os.contextMenu(menu, ev);
 }
 
+function showDraftMenu(ev: MouseEvent) {
+	function showDraftsDialog() {
+		const { dispose } = os.popup(defineAsyncComponent(() => import('@/components/MkNoteDraftsDialog.vue')), {}, {
+			restore: async (draft: Misskey.entities.NoteDraft) => {
+				text.value = draft.text ?? '';
+				useCw.value = draft.cw != null;
+				cw.value = draft.cw ?? null;
+				visibility.value = draft.visibility;
+				localOnly.value = draft.localOnly ?? false;
+				files.value = draft.files ?? [];
+				hashtags.value = draft.hashtag ?? '';
+				if (draft.hashtag) withHashtags.value = true;
+				if (draft.poll) {
+					// 投票を一時的に空にしないと反映されないため
+					poll.value = null;
+					nextTick(() => {
+						poll.value = {
+							choices: draft.poll!.choices,
+							multiple: draft.poll!.multiple,
+							expiresAt: draft.poll!.expiresAt ? (new Date(draft.poll!.expiresAt)).getTime() : null,
+							expiredAfter: null,
+						};
+					});
+				}
+				if (draft.visibleUserIds) {
+					misskeyApi('users/show', { userIds: draft.visibleUserIds }).then(users => {
+						users.forEach(u => pushVisibleUser(u));
+					});
+				}
+				quoteId.value = draft.renoteId ?? null;
+				renoteTargetNote.value = draft.renote;
+				replyTargetNote.value = draft.reply;
+				reactionAcceptance.value = draft.reactionAcceptance;
+				if (draft.channel) targetChannel.value = draft.channel as unknown as Misskey.entities.Channel;
+
+				visibleUsers.value = [];
+				draft.visibleUserIds?.forEach(uid => {
+					if (!visibleUsers.value.some(u => u.id === uid)) {
+						misskeyApi('users/show', { userId: uid }).then(user => {
+							pushVisibleUser(user);
+						});
+					}
+				});
+
+				serverDraftId.value = draft.id;
+			},
+			cancel: () => {
+
+			},
+			closed: () => {
+				dispose();
+			},
+		});
+	}
+
+	os.popupMenu([{
+		type: 'button',
+		text: i18n.ts._drafts.saveToDraft,
+		icon: 'ti ti-cloud-upload',
+		action: async () => {
+			if (!canSaveAsServerDraft.value) {
+				return os.alert({
+					type: 'error',
+					text: i18n.ts._drafts.cannotCreateDraftOfRenote,
+				});
+			}
+			saveServerDraft();
+		},
+	}, {
+		type: 'button',
+		text: i18n.ts._drafts.listDrafts,
+		icon: 'ti ti-cloud-download',
+		action: () => {
+			showDraftsDialog();
+		},
+	}], (ev.currentTarget ?? ev.target ?? undefined) as HTMLElement | undefined);
+}
+
 onMounted(() => {
 	if (props.autofocus) {
 		focus();
@@ -1204,21 +1322,18 @@ defineExpose({
 
 .headerLeft {
 	display: flex;
-	flex: 0 1 100px;
+	flex: 1;
+	flex-wrap: nowrap;
+	align-items: center;
+	gap: 6px;
+	padding-left: 12px;
 }
 
 .cancel {
-	padding: 0;
-	font-size: 1em;
-	height: 100%;
-	flex: 0 1 50px;
+	padding: 8px;
 }
 
 .account {
-	height: 100%;
-	display: inline-flex;
-	vertical-align: bottom;
-	flex: 0 1 50px;
 }
 
 .avatar {
@@ -1227,6 +1342,20 @@ defineExpose({
 	margin: auto;
 }
 
+.draftButton {
+	padding: 8px;
+	font-size: 90%;
+	border-radius: 6px;
+
+	&:hover {
+		background: light-dark(rgba(0, 0, 0, 0.05), rgba(255, 255, 255, 0.05));
+	}
+
+	&:disabled {
+		background: none;
+	}
+}
+
 .headerRight {
 	display: flex;
 	min-height: 48px;
diff --git a/packages/frontend/src/components/MkPostFormDialog.vue b/packages/frontend/src/components/MkPostFormDialog.vue
index 0a655bab99..1f7796bd83 100644
--- a/packages/frontend/src/components/MkPostFormDialog.vue
+++ b/packages/frontend/src/components/MkPostFormDialog.vue
@@ -7,9 +7,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 <MkModal
 	ref="modal"
 	:preferType="'dialog'"
-	@click="_close()"
+	@click="onBgClick()"
 	@closed="onModalClosed()"
-	@esc="_close()"
+	@esc="onEsc"
 >
 	<MkPostForm
 		ref="form"
@@ -57,6 +57,14 @@ async function _close() {
 	modal.value?.close();
 }
 
+function onEsc(ev: KeyboardEvent) {
+	_close();
+}
+
+function onBgClick() {
+	_close();
+}
+
 function onModalClosed() {
 	emit('closed');
 }
diff --git a/packages/frontend/src/pages/admin/roles.editor.vue b/packages/frontend/src/pages/admin/roles.editor.vue
index 24c3160fdd..a266e1df6f 100644
--- a/packages/frontend/src/pages/admin/roles.editor.vue
+++ b/packages/frontend/src/pages/admin/roles.editor.vue
@@ -761,6 +761,25 @@ SPDX-License-Identifier: AGPL-3.0-only
 					</MkRange>
 				</div>
 			</MkFolder>
+
+			<MkFolder v-if="matchQuery([i18n.ts._role._options.noteDraftLimit, 'noteDraftLimit'])">
+				<template #label>{{ i18n.ts._role._options.noteDraftLimit }}</template>
+				<template #suffix>
+					<span v-if="role.policies.noteDraftLimit.useDefault" :class="$style.useDefaultLabel">{{ i18n.ts._role.useBaseValue }}</span>
+					<span v-else>{{ role.policies.noteDraftLimit.value }}</span>
+					<span :class="$style.priorityIndicator"><i :class="getPriorityIcon(role.policies.noteDraftLimit)"></i></span>
+				</template>
+				<div class="_gaps">
+					<MkSwitch v-model="role.policies.noteDraftLimit.useDefault" :readonly="readonly">
+						<template #label>{{ i18n.ts._role.useBaseValue }}</template>
+					</MkSwitch>
+					<MkInput v-model="role.policies.noteDraftLimit.value" :disabled="role.policies.noteDraftLimit.useDefault" type="number" :readonly="readonly">
+					</MkInput>
+					<MkRange v-model="role.policies.noteDraftLimit.priority" :min="0" :max="2" :step="1" easing :textConverter="(v) => v === 0 ? i18n.ts._role._priority.low : v === 1 ? i18n.ts._role._priority.middle : v === 2 ? i18n.ts._role._priority.high : ''">
+						<template #label>{{ i18n.ts._role.priority }}</template>
+					</MkRange>
+				</div>
+			</MkFolder>
 		</div>
 	</FormSlot>
 </div>
diff --git a/packages/frontend/src/pages/admin/roles.vue b/packages/frontend/src/pages/admin/roles.vue
index 70e8153544..dee0fb1e5c 100644
--- a/packages/frontend/src/pages/admin/roles.vue
+++ b/packages/frontend/src/pages/admin/roles.vue
@@ -284,6 +284,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 							<template #label>{{ i18n.ts.enable }}</template>
 						</MkSwitch>
 					</MkFolder>
+
+					<MkFolder v-if="matchQuery([i18n.ts._role._options.noteDraftLimit, 'noteDraftLimit'])">
+						<template #label>{{ i18n.ts._role._options.noteDraftLimit }}</template>
+						<template #suffix>{{ policies.noteDraftLimit }}</template>
+						<MkInput v-model="policies.noteDraftLimit" type="number" :min="0">
+						</MkInput>
+					</MkFolder>
 				</div>
 			</MkFolder>
 			<MkButton primary rounded @click="create"><i class="ti ti-plus"></i> {{ i18n.ts._role.new }}</MkButton>
diff --git a/packages/frontend/src/utility/get-note-summary.ts b/packages/frontend/src/utility/get-note-summary.ts
index 6fd9947ac1..66de997aab 100644
--- a/packages/frontend/src/utility/get-note-summary.ts
+++ b/packages/frontend/src/utility/get-note-summary.ts
@@ -10,16 +10,40 @@ import { i18n } from '@/i18n.js';
  * 投稿を表す文字列を取得します。
  * @param {*} note (packされた)投稿
  */
-export const getNoteSummary = (note?: Misskey.entities.Note | null): string => {
+export const getNoteSummary = (note?: Misskey.entities.Note | Misskey.entities.NoteDraft | null, opts?: {
+	/**
+	 * ファイルの数を表示するかどうか
+	 */
+	showFiles?: boolean;
+	/**
+	 * 投票の有無を表示するかどうか
+	 */
+	showPoll?: boolean;
+	/**
+	 * 返信の有無を表示するかどうか
+	 */
+	showReply?: boolean;
+	/**
+	 * Renoteの有無を表示するかどうか
+	 */
+	showRenote?: boolean;
+}): string => {
+	const _opts = Object.assign({
+		showFiles: true,
+		showPoll: true,
+		showReply: true,
+		showRenote: true,
+	}, opts);
+
 	if (note == null) {
 		return '';
 	}
 
-	if (note.deletedAt) {
+	if ('deletedAt' in note && note.deletedAt) {
 		return `(${i18n.ts.deletedNote})`;
 	}
 
-	if (note.isHidden) {
+	if ('isHidden' in note && note.isHidden) {
 		return `(${i18n.ts.invisibleNote})`;
 	}
 
@@ -33,17 +57,17 @@ export const getNoteSummary = (note?: Misskey.entities.Note | null): string => {
 	}
 
 	// ファイルが添付されているとき
-	if ((note.files || []).length !== 0) {
-		summary += ` (${i18n.tsx.withNFiles({ n: note.files.length })})`;
+	if (_opts.showFiles && (note.files || []).length !== 0) {
+		summary += ` (${i18n.tsx.withNFiles({ n: note.files!.length })})`;
 	}
 
 	// 投票が添付されているとき
-	if (note.poll) {
+	if (_opts.showPoll && note.poll) {
 		summary += ` (${i18n.ts.poll})`;
 	}
 
 	// 返信のとき
-	if (note.replyId) {
+	if (_opts.showReply && note.replyId) {
 		if (note.reply) {
 			summary += `\n\nRE: ${getNoteSummary(note.reply)}`;
 		} else {
@@ -52,7 +76,7 @@ export const getNoteSummary = (note?: Misskey.entities.Note | null): string => {
 	}
 
 	// Renoteのとき
-	if (note.renoteId) {
+	if (_opts.showRenote && note.renoteId) {
 		if (note.renote) {
 			summary += `\n\nRN: ${getNoteSummary(note.renote)}`;
 		} else {
diff --git a/packages/misskey-js/etc/misskey-js.api.md b/packages/misskey-js/etc/misskey-js.api.md
index a6bfe825b5..027293b210 100644
--- a/packages/misskey-js/etc/misskey-js.api.md
+++ b/packages/misskey-js/etc/misskey-js.api.md
@@ -1953,6 +1953,14 @@ declare namespace entities {
         NotesCreateRequest,
         NotesCreateResponse,
         NotesDeleteRequest,
+        NotesDraftsCountResponse,
+        NotesDraftsCreateRequest,
+        NotesDraftsCreateResponse,
+        NotesDraftsDeleteRequest,
+        NotesDraftsListRequest,
+        NotesDraftsListResponse,
+        NotesDraftsUpdateRequest,
+        NotesDraftsUpdateResponse,
         NotesFavoritesCreateRequest,
         NotesFavoritesDeleteRequest,
         NotesFeaturedRequest,
@@ -2118,6 +2126,7 @@ declare namespace entities {
         Announcement,
         App,
         Note,
+        NoteDraft,
         NoteReaction,
         NoteFavorite,
         Notification_2 as Notification,
@@ -2963,6 +2972,9 @@ declare namespace note {
 export { note }
 
 // @public (undocumented)
+type NoteDraft = components['schemas']['NoteDraft'];
+
+// @public (undocumented)
 type NoteFavorite = components['schemas']['NoteFavorite'];
 
 // @public (undocumented)
@@ -2996,6 +3008,30 @@ type NotesCreateResponse = operations['notes___create']['responses']['200']['con
 type NotesDeleteRequest = operations['notes___delete']['requestBody']['content']['application/json'];
 
 // @public (undocumented)
+type NotesDraftsCountResponse = operations['notes___drafts___count']['responses']['200']['content']['application/json'];
+
+// @public (undocumented)
+type NotesDraftsCreateRequest = operations['notes___drafts___create']['requestBody']['content']['application/json'];
+
+// @public (undocumented)
+type NotesDraftsCreateResponse = operations['notes___drafts___create']['responses']['200']['content']['application/json'];
+
+// @public (undocumented)
+type NotesDraftsDeleteRequest = operations['notes___drafts___delete']['requestBody']['content']['application/json'];
+
+// @public (undocumented)
+type NotesDraftsListRequest = operations['notes___drafts___list']['requestBody']['content']['application/json'];
+
+// @public (undocumented)
+type NotesDraftsListResponse = operations['notes___drafts___list']['responses']['200']['content']['application/json'];
+
+// @public (undocumented)
+type NotesDraftsUpdateRequest = operations['notes___drafts___update']['requestBody']['content']['application/json'];
+
+// @public (undocumented)
+type NotesDraftsUpdateResponse = operations['notes___drafts___update']['responses']['200']['content']['application/json'];
+
+// @public (undocumented)
 type NotesFavoritesCreateRequest = operations['notes___favorites___create']['requestBody']['content']['application/json'];
 
 // @public (undocumented)
diff --git a/packages/misskey-js/src/autogen/apiClientJSDoc.ts b/packages/misskey-js/src/autogen/apiClientJSDoc.ts
index 037503cb7a..c638075777 100644
--- a/packages/misskey-js/src/autogen/apiClientJSDoc.ts
+++ b/packages/misskey-js/src/autogen/apiClientJSDoc.ts
@@ -3596,6 +3596,61 @@ declare module '../api.js' {
     /**
      * No description provided.
      * 
+     * **Credential required**: *Yes* / **Permission**: *read:account*
+     */
+    request<E extends 'notes/drafts/count', P extends Endpoints[E]['req']>(
+      endpoint: E,
+      params: P,
+      credential?: string | null,
+    ): Promise<SwitchCaseResponseType<E, P>>;
+
+    /**
+     * No description provided.
+     * 
+     * **Credential required**: *Yes* / **Permission**: *write:account*
+     */
+    request<E extends 'notes/drafts/create', P extends Endpoints[E]['req']>(
+      endpoint: E,
+      params: P,
+      credential?: string | null,
+    ): Promise<SwitchCaseResponseType<E, P>>;
+
+    /**
+     * No description provided.
+     * 
+     * **Credential required**: *Yes* / **Permission**: *write:account*
+     */
+    request<E extends 'notes/drafts/delete', P extends Endpoints[E]['req']>(
+      endpoint: E,
+      params: P,
+      credential?: string | null,
+    ): Promise<SwitchCaseResponseType<E, P>>;
+
+    /**
+     * No description provided.
+     * 
+     * **Credential required**: *Yes* / **Permission**: *read:account*
+     */
+    request<E extends 'notes/drafts/list', P extends Endpoints[E]['req']>(
+      endpoint: E,
+      params: P,
+      credential?: string | null,
+    ): Promise<SwitchCaseResponseType<E, P>>;
+
+    /**
+     * No description provided.
+     * 
+     * **Credential required**: *Yes* / **Permission**: *write:account*
+     */
+    request<E extends 'notes/drafts/update', P extends Endpoints[E]['req']>(
+      endpoint: E,
+      params: P,
+      credential?: string | null,
+    ): Promise<SwitchCaseResponseType<E, P>>;
+
+    /**
+     * No description provided.
+     * 
      * **Credential required**: *Yes* / **Permission**: *write:favorites*
      */
     request<E extends 'notes/favorites/create', P extends Endpoints[E]['req']>(
diff --git a/packages/misskey-js/src/autogen/endpoint.ts b/packages/misskey-js/src/autogen/endpoint.ts
index 45c65ef843..e6c0525f3b 100644
--- a/packages/misskey-js/src/autogen/endpoint.ts
+++ b/packages/misskey-js/src/autogen/endpoint.ts
@@ -488,6 +488,14 @@ import type {
 	NotesCreateRequest,
 	NotesCreateResponse,
 	NotesDeleteRequest,
+	NotesDraftsCountResponse,
+	NotesDraftsCreateRequest,
+	NotesDraftsCreateResponse,
+	NotesDraftsDeleteRequest,
+	NotesDraftsListRequest,
+	NotesDraftsListResponse,
+	NotesDraftsUpdateRequest,
+	NotesDraftsUpdateResponse,
 	NotesFavoritesCreateRequest,
 	NotesFavoritesDeleteRequest,
 	NotesFeaturedRequest,
@@ -963,6 +971,11 @@ export type Endpoints = {
 	'notes/conversation': { req: NotesConversationRequest; res: NotesConversationResponse };
 	'notes/create': { req: NotesCreateRequest; res: NotesCreateResponse };
 	'notes/delete': { req: NotesDeleteRequest; res: EmptyResponse };
+	'notes/drafts/count': { req: EmptyRequest; res: NotesDraftsCountResponse };
+	'notes/drafts/create': { req: NotesDraftsCreateRequest; res: NotesDraftsCreateResponse };
+	'notes/drafts/delete': { req: NotesDraftsDeleteRequest; res: EmptyResponse };
+	'notes/drafts/list': { req: NotesDraftsListRequest; res: NotesDraftsListResponse };
+	'notes/drafts/update': { req: NotesDraftsUpdateRequest; res: NotesDraftsUpdateResponse };
 	'notes/favorites/create': { req: NotesFavoritesCreateRequest; res: EmptyResponse };
 	'notes/favorites/delete': { req: NotesFavoritesDeleteRequest; res: EmptyResponse };
 	'notes/featured': { req: NotesFeaturedRequest; res: NotesFeaturedResponse };
diff --git a/packages/misskey-js/src/autogen/entities.ts b/packages/misskey-js/src/autogen/entities.ts
index b7286c1018..1d92094ddf 100644
--- a/packages/misskey-js/src/autogen/entities.ts
+++ b/packages/misskey-js/src/autogen/entities.ts
@@ -491,6 +491,14 @@ export type NotesConversationResponse = operations['notes___conversation']['resp
 export type NotesCreateRequest = operations['notes___create']['requestBody']['content']['application/json'];
 export type NotesCreateResponse = operations['notes___create']['responses']['200']['content']['application/json'];
 export type NotesDeleteRequest = operations['notes___delete']['requestBody']['content']['application/json'];
+export type NotesDraftsCountResponse = operations['notes___drafts___count']['responses']['200']['content']['application/json'];
+export type NotesDraftsCreateRequest = operations['notes___drafts___create']['requestBody']['content']['application/json'];
+export type NotesDraftsCreateResponse = operations['notes___drafts___create']['responses']['200']['content']['application/json'];
+export type NotesDraftsDeleteRequest = operations['notes___drafts___delete']['requestBody']['content']['application/json'];
+export type NotesDraftsListRequest = operations['notes___drafts___list']['requestBody']['content']['application/json'];
+export type NotesDraftsListResponse = operations['notes___drafts___list']['responses']['200']['content']['application/json'];
+export type NotesDraftsUpdateRequest = operations['notes___drafts___update']['requestBody']['content']['application/json'];
+export type NotesDraftsUpdateResponse = operations['notes___drafts___update']['responses']['200']['content']['application/json'];
 export type NotesFavoritesCreateRequest = operations['notes___favorites___create']['requestBody']['content']['application/json'];
 export type NotesFavoritesDeleteRequest = operations['notes___favorites___delete']['requestBody']['content']['application/json'];
 export type NotesFeaturedRequest = operations['notes___featured']['requestBody']['content']['application/json'];
diff --git a/packages/misskey-js/src/autogen/models.ts b/packages/misskey-js/src/autogen/models.ts
index babe2b1859..c3c54b3bbb 100644
--- a/packages/misskey-js/src/autogen/models.ts
+++ b/packages/misskey-js/src/autogen/models.ts
@@ -14,6 +14,7 @@ export type Ad = components['schemas']['Ad'];
 export type Announcement = components['schemas']['Announcement'];
 export type App = components['schemas']['App'];
 export type Note = components['schemas']['Note'];
+export type NoteDraft = components['schemas']['NoteDraft'];
 export type NoteReaction = components['schemas']['NoteReaction'];
 export type NoteFavorite = components['schemas']['NoteFavorite'];
 export type Notification = components['schemas']['Notification'];
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index a4578bba94..3878a74813 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -2948,6 +2948,51 @@ export type paths = {
          */
         post: operations['notes___delete'];
     };
+    '/notes/drafts/count': {
+        /**
+         * notes/drafts/count
+         * @description No description provided.
+         *
+         *     **Credential required**: *Yes* / **Permission**: *read:account*
+         */
+        post: operations['notes___drafts___count'];
+    };
+    '/notes/drafts/create': {
+        /**
+         * notes/drafts/create
+         * @description No description provided.
+         *
+         *     **Credential required**: *Yes* / **Permission**: *write:account*
+         */
+        post: operations['notes___drafts___create'];
+    };
+    '/notes/drafts/delete': {
+        /**
+         * notes/drafts/delete
+         * @description No description provided.
+         *
+         *     **Credential required**: *Yes* / **Permission**: *write:account*
+         */
+        post: operations['notes___drafts___delete'];
+    };
+    '/notes/drafts/list': {
+        /**
+         * notes/drafts/list
+         * @description No description provided.
+         *
+         *     **Credential required**: *Yes* / **Permission**: *read:account*
+         */
+        post: operations['notes___drafts___list'];
+    };
+    '/notes/drafts/update': {
+        /**
+         * notes/drafts/update
+         * @description No description provided.
+         *
+         *     **Credential required**: *Yes* / **Permission**: *write:account*
+         */
+        post: operations['notes___drafts___update'];
+    };
     '/notes/favorites/create': {
         /**
          * notes/favorites/create
@@ -4315,6 +4360,61 @@ export type components = {
             hasPoll?: boolean;
             myReaction?: string | null;
         };
+        NoteDraft: {
+            /**
+             * Format: id
+             * @example xxxxxxxxxx
+             */
+            id: string;
+            /** Format: date-time */
+            createdAt: string;
+            text: string | null;
+            cw?: string | null;
+            /** Format: id */
+            userId: string;
+            user: components['schemas']['UserLite'];
+            /**
+             * Format: id
+             * @example xxxxxxxxxx
+             */
+            replyId?: string | null;
+            /**
+             * Format: id
+             * @example xxxxxxxxxx
+             */
+            renoteId?: string | null;
+            reply?: components['schemas']['Note'] | null;
+            renote?: components['schemas']['Note'] | null;
+            /** @enum {string} */
+            visibility: 'public' | 'home' | 'followers' | 'specified';
+            visibleUserIds?: string[];
+            fileIds?: string[];
+            files?: components['schemas']['DriveFile'][];
+            hashtag?: string;
+            poll?: {
+                /** Format: date-time */
+                expiresAt?: string | null;
+                expiredAfter?: number | null;
+                multiple: boolean;
+                choices: string[];
+            } | null;
+            /**
+             * Format: id
+             * @example xxxxxxxxxx
+             */
+            channelId?: string | null;
+            channel?: {
+                id: string;
+                name: string;
+                color: string;
+                isSensitive: boolean;
+                allowRenoteToExternal: boolean;
+                userId: string | null;
+            } | null;
+            localOnly?: boolean;
+            /** @enum {string|null} */
+            reactionAcceptance: 'likeOnly' | 'likeOnlyForRemote' | 'nonSensitiveOnly' | 'nonSensitiveOnlyForLocalLikeOnlyForRemote' | null;
+        };
         NoteReaction: {
             /**
              * Format: id
@@ -5106,6 +5206,7 @@ export type components = {
             canImportUserLists: boolean;
             /** @enum {string} */
             chatAvailability: 'available' | 'readonly' | 'unavailable';
+            noteDraftLimit: number;
         };
         ReversiGameLite: {
             /** Format: id */
@@ -28586,6 +28687,407 @@ export interface operations {
             };
         };
     };
+    notes___drafts___count: {
+        responses: {
+            /** @description OK (with results) */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': number;
+                };
+            };
+            /** @description Client error */
+            400: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Authentication error */
+            401: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Forbidden error */
+            403: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description I'm Ai */
+            418: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Internal server error */
+            500: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+        };
+    };
+    notes___drafts___create: {
+        requestBody: {
+            content: {
+                'application/json': {
+                    /**
+                     * @default public
+                     * @enum {string}
+                     */
+                    visibility?: 'public' | 'home' | 'followers' | 'specified';
+                    visibleUserIds?: string[];
+                    cw?: string | null;
+                    hashtag?: string | null;
+                    /** @default false */
+                    localOnly?: boolean;
+                    /**
+                     * @default null
+                     * @enum {string|null}
+                     */
+                    reactionAcceptance?: null | 'likeOnly' | 'likeOnlyForRemote' | 'nonSensitiveOnly' | 'nonSensitiveOnlyForLocalLikeOnlyForRemote';
+                    /** Format: misskey:id */
+                    replyId?: string | null;
+                    /** Format: misskey:id */
+                    renoteId?: string | null;
+                    /** Format: misskey:id */
+                    channelId?: string | null;
+                    text?: string | null;
+                    fileIds?: string[];
+                    poll?: {
+                        choices: string[];
+                        multiple?: boolean;
+                        expiresAt?: number | null;
+                        expiredAfter?: number | null;
+                    } | null;
+                };
+            };
+        };
+        responses: {
+            /** @description OK (with results) */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': {
+                        createdDraft: components['schemas']['NoteDraft'];
+                    };
+                };
+            };
+            /** @description Client error */
+            400: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Authentication error */
+            401: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Forbidden error */
+            403: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description I'm Ai */
+            418: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Too many requests */
+            429: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Internal server error */
+            500: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+        };
+    };
+    notes___drafts___delete: {
+        requestBody: {
+            content: {
+                'application/json': {
+                    /** Format: misskey:id */
+                    draftId: string;
+                };
+            };
+        };
+        responses: {
+            /** @description OK (without any results) */
+            204: {
+                headers: {
+                    [name: string]: unknown;
+                };
+            };
+            /** @description Client error */
+            400: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Authentication error */
+            401: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Forbidden error */
+            403: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description I'm Ai */
+            418: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Internal server error */
+            500: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+        };
+    };
+    notes___drafts___list: {
+        requestBody: {
+            content: {
+                'application/json': {
+                    /** @default 30 */
+                    limit?: number;
+                    /** Format: misskey:id */
+                    sinceId?: string;
+                    /** Format: misskey:id */
+                    untilId?: string;
+                };
+            };
+        };
+        responses: {
+            /** @description OK (with results) */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['NoteDraft'][];
+                };
+            };
+            /** @description Client error */
+            400: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Authentication error */
+            401: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Forbidden error */
+            403: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description I'm Ai */
+            418: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Internal server error */
+            500: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+        };
+    };
+    notes___drafts___update: {
+        requestBody: {
+            content: {
+                'application/json': {
+                    /** Format: misskey:id */
+                    draftId: string;
+                    /**
+                     * @default public
+                     * @enum {string}
+                     */
+                    visibility?: 'public' | 'home' | 'followers' | 'specified';
+                    visibleUserIds?: string[];
+                    cw?: string | null;
+                    hashtag?: string | null;
+                    /** @default false */
+                    localOnly?: boolean;
+                    /**
+                     * @default null
+                     * @enum {string|null}
+                     */
+                    reactionAcceptance?: null | 'likeOnly' | 'likeOnlyForRemote' | 'nonSensitiveOnly' | 'nonSensitiveOnlyForLocalLikeOnlyForRemote';
+                    /** Format: misskey:id */
+                    replyId?: string | null;
+                    /** Format: misskey:id */
+                    renoteId?: string | null;
+                    /** Format: misskey:id */
+                    channelId?: string | null;
+                    text?: string | null;
+                    fileIds?: string[];
+                    poll?: {
+                        choices: string[];
+                        multiple?: boolean;
+                        expiresAt?: number | null;
+                        expiredAfter?: number | null;
+                    } | null;
+                };
+            };
+        };
+        responses: {
+            /** @description OK (with results) */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': {
+                        updatedDraft: components['schemas']['NoteDraft'];
+                    };
+                };
+            };
+            /** @description Client error */
+            400: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Authentication error */
+            401: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Forbidden error */
+            403: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description I'm Ai */
+            418: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Too many requests */
+            429: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+            /** @description Internal server error */
+            500: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    'application/json': components['schemas']['Error'];
+                };
+            };
+        };
+    };
     notes___favorites___create: {
         requestBody: {
             content: {