Discord: inherit thread allowlists

CHANGELOG.md

@@ -20,6 +20,7 @@ Docs: https://docs.clawd.bot
 - Memory: split overly long lines to keep embeddings under token limits.
 - Memory: skip empty chunks to avoid invalid embedding inputs.
 - Sessions: fall back to session labels when listing display names. (#1124) — thanks @abdaraxus.
+- Discord: inherit parent channel allowlists for thread slash commands and reactions. (#1123) — thanks @thewilloftheshadow.
 
 ## 2026.1.17-1
 

src/discord/monitor/allow-list.ts

@@ -137,6 +137,34 @@ export function resolveDiscordGuildEntry(params: {
   return null;
 }
 
+type DiscordChannelEntry = NonNullable<DiscordGuildEntryResolved["channels"]>[string];
+
+function resolveDiscordChannelEntry(
+  channels: NonNullable<DiscordGuildEntryResolved["channels"]>,
+  channelId: string,
+  channelName?: string,
+  channelSlug?: string,
+): DiscordChannelEntry | null {
+  if (channelId && channels[channelId]) return channels[channelId];
+  if (channelSlug && channels[channelSlug]) return channels[channelSlug];
+  if (channelName && channels[channelName]) return channels[channelName];
+  return null;
+}
+
+function resolveDiscordChannelConfigEntry(
+  entry: DiscordChannelEntry,
+): DiscordChannelConfigResolved {
+  return {
+    allowed: entry.allow !== false,
+    requireMention: entry.requireMention,
+    skills: entry.skills,
+    enabled: entry.enabled,
+    users: entry.users,
+    systemPrompt: entry.systemPrompt,
+    autoThread: entry.autoThread,
+  };
+}
+
 export function resolveDiscordChannelConfig(params: {
   guildInfo?: DiscordGuildEntryResolved | null;
   channelId: string;
@@ -146,40 +174,35 @@ export function resolveDiscordChannelConfig(params: {
   const { guildInfo, channelId, channelName, channelSlug } = params;
   const channels = guildInfo?.channels;
   if (!channels) return null;
-  const byId = channels[channelId];
-  if (byId)
-    return {
-      allowed: byId.allow !== false,
-      requireMention: byId.requireMention,
-      skills: byId.skills,
-      enabled: byId.enabled,
-      users: byId.users,
-      systemPrompt: byId.systemPrompt,
-      autoThread: byId.autoThread,
-    };
-  if (channelSlug && channels[channelSlug]) {
-    const entry = channels[channelSlug];
-    return {
-      allowed: entry.allow !== false,
-      requireMention: entry.requireMention,
-      skills: entry.skills,
-      enabled: entry.enabled,
-      users: entry.users,
-      systemPrompt: entry.systemPrompt,
-      autoThread: entry.autoThread,
-    };
-  }
-  if (channelName && channels[channelName]) {
-    const entry = channels[channelName];
-    return {
-      allowed: entry.allow !== false,
-      requireMention: entry.requireMention,
-      skills: entry.skills,
-      enabled: entry.enabled,
-      users: entry.users,
-      systemPrompt: entry.systemPrompt,
-      autoThread: entry.autoThread,
-    };
+  const entry = resolveDiscordChannelEntry(channels, channelId, channelName, channelSlug);
+  if (!entry) return { allowed: false };
+  return resolveDiscordChannelConfigEntry(entry);
+}
+
+export function resolveDiscordChannelConfigWithFallback(params: {
+  guildInfo?: DiscordGuildEntryResolved | null;
+  channelId: string;
+  channelName?: string;
+  channelSlug: string;
+  parentId?: string;
+  parentName?: string;
+  parentSlug?: string;
+}): DiscordChannelConfigResolved | null {
+  const { guildInfo, channelId, channelName, channelSlug, parentId, parentName, parentSlug } =
+    params;
+  const channels = guildInfo?.channels;
+  if (!channels) return null;
+  const entry = resolveDiscordChannelEntry(channels, channelId, channelName, channelSlug);
+  if (entry) return resolveDiscordChannelConfigEntry(entry);
+  if (parentId || parentName || parentSlug) {
+    const resolvedParentSlug = parentSlug ?? (parentName ? normalizeDiscordSlug(parentName) : "");
+    const parentEntry = resolveDiscordChannelEntry(
+      channels,
+      parentId ?? "",
+      parentName,
+      resolvedParentSlug,
+    );
+    if (parentEntry) return resolveDiscordChannelConfigEntry(parentEntry);
   }
   return { allowed: false };
 }

src/discord/monitor/message-handler.preflight.ts

@@ -22,7 +22,7 @@ import {
   isDiscordGroupAllowedByPolicy,
   normalizeDiscordAllowList,
   normalizeDiscordSlug,
-  resolveDiscordChannelConfig,
+  resolveDiscordChannelConfigWithFallback,
   resolveDiscordGuildEntry,
   resolveDiscordShouldRequireMention,
   resolveDiscordUserAllowed,
@@ -236,13 +236,19 @@ export async function preflightDiscordMessage(
     guildInfo?.slug ||
     (params.data.guild?.name ? normalizeDiscordSlug(params.data.guild.name) : "");
 
+  const threadChannelSlug = channelName ? normalizeDiscordSlug(channelName) : "";
+  const threadParentSlug = threadParentName ? normalizeDiscordSlug(threadParentName) : "";
+
   const baseSessionKey = route.sessionKey;
   const channelConfig = isGuildMessage
-    ? resolveDiscordChannelConfig({
+    ? resolveDiscordChannelConfigWithFallback({
         guildInfo,
-        channelId: threadParentId ?? message.channelId,
-        channelName: configChannelName,
-        channelSlug: configChannelSlug,
+        channelId: message.channelId,
+        channelName,
+        channelSlug: threadChannelSlug,
+        parentId: threadParentId ?? undefined,
+        parentName: threadParentName ?? undefined,
+        parentSlug: threadParentSlug,
       })
     : null;
   if (isGuildMessage && channelConfig?.enabled === false) {

src/discord/monitor/native-command.ts

@@ -47,11 +47,13 @@ import {
   isDiscordGroupAllowedByPolicy,
   normalizeDiscordAllowList,
   normalizeDiscordSlug,
-  resolveDiscordChannelConfig,
+  resolveDiscordChannelConfigWithFallback,
   resolveDiscordGuildEntry,
   resolveDiscordUserAllowed,
 } from "./allow-list.js";
 import { formatDiscordUserTag } from "./format.js";
+import { resolveDiscordChannelInfo } from "./message-utils.js";
+import { resolveDiscordThreadParentInfo } from "./threading.js";
 
 type DiscordConfig = NonNullable<ClawdbotConfig["channels"]>["discord"];
 
@@ -499,8 +501,13 @@ async function dispatchDiscordCommandInteraction(params: {
   const channelType = channel?.type;
   const isDirectMessage = channelType === ChannelType.DM;
   const isGroupDm = channelType === ChannelType.GroupDM;
+  const isThreadChannel =
+    channelType === ChannelType.PublicThread ||
+    channelType === ChannelType.PrivateThread ||
+    channelType === ChannelType.AnnouncementThread;
   const channelName = channel && "name" in channel ? (channel.name as string) : undefined;
   const channelSlug = channelName ? normalizeDiscordSlug(channelName) : "";
+  const rawChannelId = channel?.id ?? "";
   const ownerAllowList = normalizeDiscordAllowList(discordConfig?.dm?.allowFrom ?? [], [
     "discord:",
     "user:",
@@ -517,12 +524,35 @@ async function dispatchDiscordCommandInteraction(params: {
     guild: interaction.guild ?? undefined,
     guildEntries: discordConfig?.guilds,
   });
+  let threadParentId: string | undefined;
+  let threadParentName: string | undefined;
+  let threadParentSlug = "";
+  if (interaction.guild && channel && isThreadChannel && rawChannelId) {
+    // Threads inherit parent channel config unless explicitly overridden.
+    const channelInfo = await resolveDiscordChannelInfo(interaction.client, rawChannelId);
+    const parentInfo = await resolveDiscordThreadParentInfo({
+      client: interaction.client,
+      threadChannel: {
+        id: rawChannelId,
+        name: channelName,
+        parentId: "parentId" in channel ? channel.parentId ?? undefined : undefined,
+        parent: undefined,
+      },
+      channelInfo,
+    });
+    threadParentId = parentInfo.id;
+    threadParentName = parentInfo.name;
+    threadParentSlug = threadParentName ? normalizeDiscordSlug(threadParentName) : "";
+  }
   const channelConfig = interaction.guild
-    ? resolveDiscordChannelConfig({
+    ? resolveDiscordChannelConfigWithFallback({
         guildInfo,
-        channelId: channel?.id ?? "",
+        channelId: rawChannelId,
         channelName,
         channelSlug,
+        parentId: threadParentId,
+        parentName: threadParentName,
+        parentSlug: threadParentSlug,
       })
     : null;
   if (channelConfig?.enabled === false) {
@@ -664,7 +694,7 @@ async function dispatchDiscordCommandInteraction(params: {
   }
 
   const isGuild = Boolean(interaction.guild);
-  const channelId = channel?.id ?? "unknown";
+  const channelId = rawChannelId || "unknown";
   const interactionId = interaction.rawData.id;
   const route = resolveAgentRoute({
     cfg,