fix: scope history injection to pending-only

src/slack/monitor/message-handler/dispatch.ts

@@ -66,8 +66,6 @@ export async function dispatchPreparedSlackMessage(prepared: PreparedSlackMessag
     });
   };
 
-  let didSendReply = false;
-
   // Create mutable context for response prefix template interpolation
   let prefixContext: ResponsePrefixContext = {
     identityName: resolveIdentityName(cfg, route.agentId),
@@ -88,7 +86,6 @@ export async function dispatchPreparedSlackMessage(prepared: PreparedSlackMessag
         textLimit: ctx.textLimit,
         replyThreadTs,
       });
-      didSendReply = true;
       replyPlan.markSent();
     },
     onError: (err, info) => {
@@ -136,7 +133,7 @@ export async function dispatchPreparedSlackMessage(prepared: PreparedSlackMessag
   }
 
   if (!queuedFinal) {
-    if (prepared.isRoomish && ctx.historyLimit > 0 && didSendReply) {
+    if (prepared.isRoomish && ctx.historyLimit > 0) {
       clearHistoryEntries({
         historyMap: ctx.channelHistories,
         historyKey: prepared.historyKey,
@@ -168,7 +165,7 @@ export async function dispatchPreparedSlackMessage(prepared: PreparedSlackMessag
     });
   }
 
-  if (prepared.isRoomish && ctx.historyLimit > 0 && didSendReply) {
+  if (prepared.isRoomish && ctx.historyLimit > 0) {
     clearHistoryEntries({
       historyMap: ctx.channelHistories,
       historyKey: prepared.historyKey,