feat: support default_thread_rate_limit_per_user in channel creation

src/managers/GuildChannelManager.js

@@ -150,6 +150,7 @@ class GuildChannelManager extends CachedManager {
       defaultReactionEmoji,
       defaultSortOrder,
       defaultForumLayout,
+      defaultThreadRateLimitPerUser,
       reason,
     } = {},
   ) {
@@ -191,6 +192,7 @@ class GuildChannelManager extends CachedManager {
         default_reaction_emoji: defaultReactionEmoji && transformGuildDefaultReaction(defaultReactionEmoji),
         default_sort_order: sortMode,
         default_forum_layout: layoutMode,
+        default_thread_rate_limit_per_user: defaultThreadRateLimitPerUser,
       },
       reason,
     });

src/structures/BaseGuildTextChannel.js

@@ -74,6 +74,16 @@ class BaseGuildTextChannel extends GuildChannel {
       this.defaultAutoArchiveDuration = data.default_auto_archive_duration;
     }
 
+    if ('default_thread_rate_limit_per_user' in data) {
+      /**
+       * The initial rate limit per user (slowmode) to set on newly created threads in a channel.
+       * @type {?number}
+       */
+      this.defaultThreadRateLimitPerUser = data.default_thread_rate_limit_per_user;
+    } else {
+      this.defaultThreadRateLimitPerUser ??= null;
+    }
+
     if ('messages' in data) {
       for (const message of data.messages) this.messages._add(message);
     }

src/structures/CategoryChannel.js

@@ -62,6 +62,8 @@ class CategoryChannel extends GuildChannel {
    * @property {?DefaultReactionEmoji} [defaultReactionEmoji] The emoji to set as the default reaction emoji
    * @property {number} [defaultThreadRateLimitPerUser] The rate limit per user (slowmode) to set on forum posts
    * @property {?SortOrderType} [defaultSortOrder] The default sort order mode to set on the new channel
+   * @property {number} [defaultThreadRateLimitPerUser] The initial rate limit per user (slowmode)
+   * to set on newly created threads in a channel.
    * @property {string} [reason] Reason for creating the new channel
    */
 

typings/index.d.ts

@@ -463,6 +463,7 @@ export class BaseGuildEmoji extends Emoji {
 export class BaseGuildTextChannel extends TextBasedChannelMixin(GuildChannel) {
   protected constructor(guild: Guild, data?: RawGuildChannelData, client?: Client, immediatePatch?: boolean);
   public defaultAutoArchiveDuration?: ThreadAutoArchiveDuration;
+  public defaultThreadRateLimitPerUser: number | null;
   public rateLimitPerUser: number | null;
   public nsfw: boolean;
   public threads: GuildTextThreadManager<AllowedThreadTypeForTextChannel | AllowedThreadTypeForNewsChannel>;
@@ -4488,6 +4489,7 @@ export interface CategoryCreateChannelOptions {
   defaultReactionEmoji?: DefaultReactionEmoji;
   defaultSortOrder?: SortOrderType;
   defaultForumLayout?: ForumLayoutType;
+  defaultThreadRateLimitPerUser?: number;
   reason?: string;
 }