diff --git a/src/auto-reply/reply/agent-runner.ts b/src/auto-reply/reply/agent-runner.ts
index 4cdae88142d..3d89eabb193 100644
--- a/src/auto-reply/reply/agent-runner.ts
+++ b/src/auto-reply/reply/agent-runner.ts
@@ -58,6 +58,8 @@ import { incrementRunCompactionCount, persistRunSessionUsage } from "./session-r
 import { createTypingSignaler } from "./typing-mode.js";
 import type { TypingController } from "./typing.js";
 
+const RECENT_MESSAGING_TOOL_DEDUPE_WINDOW_MS = 2 * 60 * 1000;
+
 const BLOCK_REPLY_SEND_TIMEOUT_MS = 15_000;
 
 export async function runReplyAgent(params: {