From 5c35b62a5c41a8de58a90183fc74185b4a307e2a Mon Sep 17 00:00:00 2001
From: Shadow <hi@shadowing.dev>
Date: Mon, 26 Jan 2026 15:23:51 -0600
Subject: [PATCH] fix: refresh history key order for LRU eviction

---
 src/auto-reply/reply/history.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/auto-reply/reply/history.ts b/src/auto-reply/reply/history.ts
index 8e1478f76..45ad44d5a 100644
--- a/src/auto-reply/reply/history.ts
+++ b/src/auto-reply/reply/history.ts
@@ -54,6 +54,10 @@ export function appendHistoryEntry<T extends HistoryEntry>(params: {
   const history = historyMap.get(historyKey) ?? [];
   history.push(entry);
   while (history.length > params.limit) history.shift();
+  if (historyMap.has(historyKey)) {
+    // Refresh insertion order so eviction keeps recently used histories.
+    historyMap.delete(historyKey);
+  }
   historyMap.set(historyKey, history);
   // Evict oldest keys if map exceeds max size to prevent unbounded memory growth
   evictOldHistoryKeys(historyMap);