diff --git a/src/agents/tool-loop-detection.ts b/src/agents/tool-loop-detection.ts
index 972f5bb8d43..82fc64067ad 100644
--- a/src/agents/tool-loop-detection.ts
+++ b/src/agents/tool-loop-detection.ts
@@ -6,14 +6,14 @@ import { isPlainObject } from "../utils.js";
 
 const log = createSubsystemLogger("agents/loop-detection");
 
-export type LoopDetectorKind =
+type LoopDetectorKind =
   | "generic_repeat"
   | "unknown_tool_repeat"
   | "known_poll_no_progress"
   | "global_circuit_breaker"
   | "ping_pong";
 
-export type LoopDetectionResult =
+type LoopDetectionResult =
   | { stuck: false }
   | {
       stuck: true;
@@ -58,7 +58,7 @@ type ResolvedLoopDetectionConfig = {
   };
 };
 
-export type ToolLoopDetectionScope = {
+type ToolLoopDetectionScope = {
   runId?: string;
 };
 
diff --git a/src/agents/tool-mutation.ts b/src/agents/tool-mutation.ts
index 65ee228856e..d913446125f 100644
--- a/src/agents/tool-mutation.ts
+++ b/src/agents/tool-mutation.ts
@@ -52,12 +52,12 @@ const MESSAGE_MUTATING_ACTIONS = new Set([
   "unpin",
 ]);
 
-export type ToolMutationState = {
+type ToolMutationState = {
   mutatingAction: boolean;
   actionFingerprint?: string;
 };
 
-export type ToolActionRef = {
+type ToolActionRef = {
   toolName: string;
   meta?: string;
   actionFingerprint?: string;
diff --git a/src/agents/transport-stream-shared.ts b/src/agents/transport-stream-shared.ts
index 9133f6ba572..b961dec7079 100644
--- a/src/agents/transport-stream-shared.ts
+++ b/src/agents/transport-stream-shared.ts
@@ -1,6 +1,6 @@
 import { createAssistantMessageEventStream } from "@mariozechner/pi-ai";
 
-export type TransportUsage = {
+type TransportUsage = {
   input: number;
   output: number;
   cacheRead: number;