diff --git a/extensions/matrix/src/matrix/actions/types.ts b/extensions/matrix/src/matrix/actions/types.ts
index 8cc79959281..23f95ce90b8 100644
--- a/extensions/matrix/src/matrix/actions/types.ts
+++ b/extensions/matrix/src/matrix/actions/types.ts
@@ -1,22 +1,9 @@
 import type { CoreConfig } from "../../types.js";
-import {
-  MATRIX_ANNOTATION_RELATION_TYPE,
-  MATRIX_REACTION_EVENT_TYPE,
-  type MatrixReactionEventContent,
-} from "../reaction-common.js";
+import { MATRIX_REACTION_EVENT_TYPE } from "../reaction-common.js";
 import type { MatrixClient, MessageEventContent } from "../sdk.js";
 export type { MatrixRawEvent } from "../sdk.js";
 export type { MatrixReactionSummary } from "../reaction-common.js";
 
-export const MsgType = {
-  Text: "m.text",
-} as const;
-
-export const RelationType = {
-  Replace: "m.replace",
-  Annotation: MATRIX_ANNOTATION_RELATION_TYPE,
-} as const;
-
 export const EventType = {
   RoomMessage: "m.room.message",
   RoomPinnedEvents: "m.room.pinned_events",
@@ -35,16 +22,10 @@ export type RoomMessageEventContent = MessageEventContent & {
   };
 };
 
-export type ReactionEventContent = MatrixReactionEventContent;
-
 export type RoomPinnedEventsEventContent = {
   pinned: string[];
 };
 
-export type RoomTopicEventContent = {
-  topic?: string;
-};
-
 export type MatrixActionClientOpts = {
   client?: MatrixClient;
   cfg?: CoreConfig;
diff --git a/extensions/matrix/src/matrix/send/types.ts b/extensions/matrix/src/matrix/send/types.ts
index da90dd9de62..e3bf69e7e47 100644
--- a/extensions/matrix/src/matrix/send/types.ts
+++ b/extensions/matrix/src/matrix/send/types.ts
@@ -1,9 +1,5 @@
 import type { CoreConfig } from "../../types.js";
-import {
-  MATRIX_ANNOTATION_RELATION_TYPE,
-  MATRIX_REACTION_EVENT_TYPE,
-  type MatrixReactionEventContent,
-} from "../reaction-common.js";
+import { MATRIX_ANNOTATION_RELATION_TYPE, MATRIX_REACTION_EVENT_TYPE } from "../reaction-common.js";
 import type {
   DimensionalFileInfo,
   EncryptedFile,
@@ -79,8 +75,6 @@ export type MatrixMediaContent = MessageEventContent &
 
 export type MatrixOutboundContent = MatrixTextContent | MatrixMediaContent;
 
-export type ReactionEventContent = MatrixReactionEventContent;
-
 export type MatrixSendResult = {
   messageId: string;
   roomId: string;
diff --git a/extensions/qqbot/src/engine/gateway/stages/access-stage.ts b/extensions/qqbot/src/engine/gateway/stages/access-stage.ts
index 7523ae29835..c0bde54f26e 100644
--- a/extensions/qqbot/src/engine/gateway/stages/access-stage.ts
+++ b/extensions/qqbot/src/engine/gateway/stages/access-stage.ts
@@ -15,7 +15,7 @@ import { buildBlockedInboundContext } from "./stub-contexts.js";
 
 // ─────────────────────────── Types ───────────────────────────
 
-export interface AccessStageAllow {
+interface AccessStageAllow {
   kind: "allow";
   isGroupChat: boolean;
   peerId: string;
@@ -25,12 +25,12 @@ export interface AccessStageAllow {
   access: QQBotAccessResult;
 }
 
-export interface AccessStageBlock {
+interface AccessStageBlock {
   kind: "block";
   context: InboundContext;
 }
 
-export type AccessStageResult = AccessStageAllow | AccessStageBlock;
+type AccessStageResult = AccessStageAllow | AccessStageBlock;
 
 // ─────────────────────────── Stage ───────────────────────────
 
diff --git a/extensions/qqbot/src/engine/gateway/stages/assembly-stage.ts b/extensions/qqbot/src/engine/gateway/stages/assembly-stage.ts
index dd4b1252d22..a800a0269e2 100644
--- a/extensions/qqbot/src/engine/gateway/stages/assembly-stage.ts
+++ b/extensions/qqbot/src/engine/gateway/stages/assembly-stage.ts
@@ -26,7 +26,7 @@ import type { QueuedMessage } from "../message-queue.js";
 
 // ─────────────────────────── buildUserMessage ───────────────────────────
 
-export interface BuildUserMessageInput {
+interface BuildUserMessageInput {
   event: QueuedMessage;
   userContent: string;
   quotePart: string;
@@ -69,7 +69,7 @@ export function buildUserMessage(input: BuildUserMessageInput): string {
 
 // ─────────────────────────── buildAgentBody ───────────────────────────
 
-export interface BuildAgentBodyInput {
+interface BuildAgentBodyInput {
   event: QueuedMessage;
   userContent: string;
   userMessage: string;
diff --git a/extensions/qqbot/src/engine/gateway/stages/content-stage.ts b/extensions/qqbot/src/engine/gateway/stages/content-stage.ts
index 3a9e05dc1e1..34fecf2dbed 100644
--- a/extensions/qqbot/src/engine/gateway/stages/content-stage.ts
+++ b/extensions/qqbot/src/engine/gateway/stages/content-stage.ts
@@ -18,7 +18,7 @@ import type { QueuedMention, QueuedMessage } from "../message-queue.js";
 // ─────────────────────────── Types ───────────────────────────
 
 /** Input for {@link buildUserContent}. */
-export interface ContentStageInput {
+interface ContentStageInput {
   event: QueuedMessage;
   /** `attachmentInfo` from the attachment stage — appended verbatim. */
   attachmentInfo: string;
@@ -27,7 +27,7 @@ export interface ContentStageInput {
 }
 
 /** Output of {@link buildUserContent}. */
-export interface ContentStageOutput {
+interface ContentStageOutput {
   /** `parseFaceTags(event.content)`. */
   parsedContent: string;
   /** Full user-visible content (parsed + voice + attachments + mention cleanup). */
diff --git a/extensions/qqbot/src/engine/gateway/stages/envelope-stage.ts b/extensions/qqbot/src/engine/gateway/stages/envelope-stage.ts
index 550608c5cd3..501208683bb 100644
--- a/extensions/qqbot/src/engine/gateway/stages/envelope-stage.ts
+++ b/extensions/qqbot/src/engine/gateway/stages/envelope-stage.ts
@@ -13,7 +13,7 @@ import type { QueuedMessage } from "../message-queue.js";
 
 // ─────────────────────────── Envelope body ───────────────────────────
 
-export interface BuildBodyInput {
+interface BuildBodyInput {
   event: QueuedMessage;
   deps: InboundPipelineDeps;
   userContent: string;
@@ -49,7 +49,7 @@ export function buildQuotePart(replyTo?: ReplyToInfo): string {
     : `[Quoted message begins]\nOriginal content unavailable\n[Quoted message ends]\n`;
 }
 
-export interface BuildDynamicCtxInput {
+interface BuildDynamicCtxInput {
   imageUrls: string[];
   uniqueVoicePaths: string[];
   uniqueVoiceUrls: string[];
@@ -94,7 +94,7 @@ export function buildGroupSystemPrompt(
 
 // ─────────────────────────── Media classification ───────────────────────────
 
-export interface MediaClassification {
+interface MediaClassification {
   localMediaPaths: string[];
   localMediaTypes: string[];
   remoteMediaUrls: string[];
diff --git a/extensions/qqbot/src/engine/gateway/stages/group-gate-stage.ts b/extensions/qqbot/src/engine/gateway/stages/group-gate-stage.ts
index f1dc6225b39..f22f65b283d 100644
--- a/extensions/qqbot/src/engine/gateway/stages/group-gate-stage.ts
+++ b/extensions/qqbot/src/engine/gateway/stages/group-gate-stage.ts
@@ -27,20 +27,20 @@ import { isMergedTurn, type QueuedMessage } from "../message-queue.js";
 
 // ─────────────────────────── Types ───────────────────────────
 
-export interface GroupGatePass {
+interface GroupGatePass {
   kind: "pass";
   groupInfo: InboundGroupInfo;
 }
 
-export interface GroupGateSkip {
+interface GroupGateSkip {
   kind: "skip";
   groupInfo: InboundGroupInfo;
   skipReason: NonNullable<import("../inbound-context.js").InboundContext["skipReason"]>;
 }
 
-export type GroupGateStageResult = GroupGatePass | GroupGateSkip;
+type GroupGateStageResult = GroupGatePass | GroupGateSkip;
 
-export interface GroupGateStageInput {
+interface GroupGateStageInput {
   event: QueuedMessage;
   deps: InboundPipelineDeps;
   accountId: string;
diff --git a/extensions/qqbot/src/engine/gateway/stages/index.ts b/extensions/qqbot/src/engine/gateway/stages/index.ts
index 322a99d87b3..8882dc4b99f 100644
--- a/extensions/qqbot/src/engine/gateway/stages/index.ts
+++ b/extensions/qqbot/src/engine/gateway/stages/index.ts
@@ -15,4 +15,4 @@ export * from "./envelope-stage.js";
 export * from "./group-gate-stage.js";
 export * from "./quote-stage.js";
 export * from "./refidx-stage.js";
-export * from "./stub-contexts.js";
+export { buildSkippedInboundContext } from "./stub-contexts.js";
diff --git a/extensions/qqbot/src/engine/gateway/stages/stub-contexts.ts b/extensions/qqbot/src/engine/gateway/stages/stub-contexts.ts
index d49fe0b3605..fa95fb755f7 100644
--- a/extensions/qqbot/src/engine/gateway/stages/stub-contexts.ts
+++ b/extensions/qqbot/src/engine/gateway/stages/stub-contexts.ts
@@ -23,7 +23,7 @@ interface BaseStubFields {
 }
 
 /** Build an {@link InboundContext} with all non-routing fields cleared. */
-export function emptyInboundContext(fields: BaseStubFields): InboundContext {
+function emptyInboundContext(fields: BaseStubFields): InboundContext {
   return {
     event: fields.event,
     route: fields.route,
diff --git a/extensions/qqbot/src/engine/types.ts b/extensions/qqbot/src/engine/types.ts
index 23cf39b4978..c33757c979b 100644
--- a/extensions/qqbot/src/engine/types.ts
+++ b/extensions/qqbot/src/engine/types.ts
@@ -139,13 +139,6 @@ export interface UploadPrepareResponse {
   retry_timeout?: number;
 }
 
-/** Complete upload response. */
-export interface MediaUploadResponse {
-  file_uuid: string;
-  file_info: string;
-  ttl: number;
-}
-
 /** File hash information for upload_prepare. */
 export interface UploadPrepareHashes {
   /** Whole-file MD5 (hex). */
diff --git a/extensions/slack/src/monitor/events/interactions.block-actions.ts b/extensions/slack/src/monitor/events/interactions.block-actions.ts
index ff4c02cba98..803114c73cc 100644
--- a/extensions/slack/src/monitor/events/interactions.block-actions.ts
+++ b/extensions/slack/src/monitor/events/interactions.block-actions.ts
@@ -62,7 +62,7 @@ type InteractionSelectionFields = {
   routedChannelId?: string;
 };
 
-export type InteractionSummary = InteractionSelectionFields & {
+type InteractionSummary = InteractionSelectionFields & {
   interactionType?: "block_action" | "view_submission" | "view_closed";
   actionId: string;
   userId?: string;
diff --git a/extensions/slack/src/monitor/types.ts b/extensions/slack/src/monitor/types.ts
index 7d66dd83a53..fb98a8aa5df 100644
--- a/extensions/slack/src/monitor/types.ts
+++ b/extensions/slack/src/monitor/types.ts
@@ -86,13 +86,4 @@ export type SlackMessageDeletedEvent = {
   event_ts?: string;
 };
 
-export type SlackThreadBroadcastEvent = {
-  type: "message";
-  subtype: "thread_broadcast";
-  channel?: string;
-  user?: string;
-  message?: { ts?: string; user?: string; bot_id?: string };
-  event_ts?: string;
-};
-
 export type { SlackFile, SlackMessageEvent };
diff --git a/extensions/telegram/src/bot/reply-threading.ts b/extensions/telegram/src/bot/reply-threading.ts
index 7ee37c6cd73..a65d511cb99 100644
--- a/extensions/telegram/src/bot/reply-threading.ts
+++ b/extensions/telegram/src/bot/reply-threading.ts
@@ -5,13 +5,6 @@ export type DeliveryProgress = {
   hasDelivered: boolean;
 };
 
-export function createDeliveryProgress(): DeliveryProgress {
-  return {
-    hasReplied: false,
-    hasDelivered: false,
-  };
-}
-
 export function resolveReplyToForSend(params: {
   replyToId?: number;
   replyToMode: ReplyToMode;
diff --git a/extensions/telegram/src/bot/types.ts b/extensions/telegram/src/bot/types.ts
index 516da65b23c..766c459b396 100644
--- a/extensions/telegram/src/bot/types.ts
+++ b/extensions/telegram/src/bot/types.ts
@@ -22,10 +22,6 @@ export type TelegramContext = {
   getFile: TelegramGetFile;
 };
 
-export type TelegramSyntheticContextSource = Pick<TelegramContext, "me"> & {
-  getFile?: TelegramGetFile;
-};
-
 /** Telegram sticker metadata for context enrichment and caching. */
 export interface StickerMetadata {
   /** Emoji associated with the sticker. */