refactor: unify reply dispatch across providers

src/signal/monitor.ts

@@ -1,5 +1,6 @@
 import { chunkText, resolveTextChunkLimit } from "../auto-reply/chunk.js";
 import { formatAgentEnvelope } from "../auto-reply/envelope.js";
+import { createReplyDispatcher } from "../auto-reply/reply/reply-dispatcher.js";
 import { getReplyFromConfig } from "../auto-reply/reply.js";
 import type { ReplyPayload } from "../auto-reply/types.js";
 import { loadConfig } from "../config/config.js";
@@ -379,37 +380,36 @@ export async function monitorSignalProvider(
         );
       }
 
-      let blockSendChain: Promise<void> = Promise.resolve();
-      const sendBlockReply = (payload: ReplyPayload) => {
-        if (
-          !payload?.text &&
-          !payload?.mediaUrl &&
-          !(payload?.mediaUrls?.length ?? 0)
-        ) {
-          return;
-        }
-        blockSendChain = blockSendChain
-          .then(async () => {
-            await deliverReplies({
-              replies: [payload],
-              target: ctxPayload.To,
-              baseUrl,
-              account,
-              runtime,
-              maxBytes: mediaMaxBytes,
-              textLimit,
-            });
-          })
-          .catch((err) => {
-            runtime.error?.(
-              danger(`signal block reply failed: ${String(err)}`),
-            );
+      const dispatcher = createReplyDispatcher({
+        responsePrefix: cfg.messages?.responsePrefix,
+        deliver: async (payload) => {
+          await deliverReplies({
+            replies: [payload],
+            target: ctxPayload.To,
+            baseUrl,
+            account,
+            runtime,
+            maxBytes: mediaMaxBytes,
+            textLimit,
           });
-      };
+        },
+        onError: (err, info) => {
+          runtime.error?.(
+            danger(`signal ${info.kind} reply failed: ${String(err)}`),
+          );
+        },
+      });
 
       const replyResult = await getReplyFromConfig(
         ctxPayload,
-        { onBlockReply: sendBlockReply },
+        {
+          onToolResult: (payload) => {
+            dispatcher.sendToolResult(payload);
+          },
+          onBlockReply: (payload) => {
+            dispatcher.sendBlockReply(payload);
+          },
+        },
         cfg,
       );
       const replies = replyResult
@@ -417,18 +417,12 @@ export async function monitorSignalProvider(
           ? replyResult
           : [replyResult]
         : [];
-      await blockSendChain;
-      if (replies.length === 0) return;
-
-      await deliverReplies({
-        replies,
-        target: ctxPayload.To,
-        baseUrl,
-        account,
-        runtime,
-        maxBytes: mediaMaxBytes,
-        textLimit,
-      });
+      let queuedFinal = false;
+      for (const reply of replies) {
+        queuedFinal = dispatcher.sendFinalReply(reply) || queuedFinal;
+      }
+      await dispatcher.waitForIdle();
+      if (!queuedFinal) return;
     };
 
     await streamSignalEvents({