fix: newline chunking across channels

src/slack/monitor/replies.ts

@@ -1,5 +1,7 @@
 import { createReplyReferencePlanner } from "../../auto-reply/reply/reply-reference.js";
 import { isSilentReplyText, SILENT_REPLY_TOKEN } from "../../auto-reply/tokens.js";
+import type { ChunkMode } from "../../auto-reply/chunk.js";
+import { chunkMarkdownTextWithMode } from "../../auto-reply/chunk.js";
 import type { ReplyPayload } from "../../auto-reply/types.js";
 import type { MarkdownTableMode } from "../../config/types.base.js";
 import type { RuntimeEnv } from "../../runtime.js";
@@ -118,6 +120,7 @@ export async function deliverSlackSlashReplies(params: {
   ephemeral: boolean;
   textLimit: number;
   tableMode?: MarkdownTableMode;
+  chunkMode?: ChunkMode;
 }) {
   const messages: string[] = [];
   const chunkLimit = Math.min(params.textLimit, 4000);
@@ -129,9 +132,16 @@ export async function deliverSlackSlashReplies(params: {
       .filter(Boolean)
       .join("\n");
     if (!combined) continue;
-    for (const chunk of markdownToSlackMrkdwnChunks(combined, chunkLimit, {
-      tableMode: params.tableMode,
-    })) {
+    const chunkMode = params.chunkMode ?? "length";
+    const markdownChunks =
+      chunkMode === "newline"
+        ? chunkMarkdownTextWithMode(combined, chunkLimit, chunkMode)
+        : [combined];
+    const chunks = markdownChunks.flatMap((markdown) =>
+      markdownToSlackMrkdwnChunks(markdown, chunkLimit, { tableMode: params.tableMode }),
+    );
+    if (!chunks.length && combined) chunks.push(combined);
+    for (const chunk of chunks) {
       messages.push(chunk);
     }
   }

src/slack/monitor/slash.ts

@@ -1,5 +1,6 @@
 import type { SlackActionMiddlewareArgs, SlackCommandMiddlewareArgs } from "@slack/bolt";
 import type { ChatCommandDefinition, CommandArgs } from "../../auto-reply/commands-registry.js";
+import { resolveChunkMode } from "../../auto-reply/chunk.js";
 import { resolveEffectiveMessagesConfig } from "../../agents/identity.js";
 import {
   buildCommandTextFromArgs,
@@ -429,6 +430,7 @@ export function registerSlackMonitorSlashCommands(params: {
               respond,
               ephemeral: slashCommand.ephemeral,
               textLimit: ctx.textLimit,
+              chunkMode: resolveChunkMode(cfg, "slack", route.accountId),
               tableMode: resolveMarkdownTableMode({
                 cfg,
                 channel: "slack",
@@ -448,6 +450,7 @@ export function registerSlackMonitorSlashCommands(params: {
           respond,
           ephemeral: slashCommand.ephemeral,
           textLimit: ctx.textLimit,
+          chunkMode: resolveChunkMode(cfg, "slack", route.accountId),
           tableMode: resolveMarkdownTableMode({
             cfg,
             channel: "slack",

src/slack/send.ts

@@ -1,6 +1,10 @@
 import { type FilesUploadV2Arguments, type WebClient } from "@slack/web-api";
 
-import { resolveTextChunkLimit } from "../auto-reply/chunk.js";
+import {
+  chunkMarkdownTextWithMode,
+  resolveChunkMode,
+  resolveTextChunkLimit,
+} from "../auto-reply/chunk.js";
 import { loadConfig } from "../config/config.js";
 import { logVerbose } from "../globals.js";
 import { loadWebMedia } from "../web/media.js";
@@ -149,7 +153,15 @@ export async function sendMessageSlack(
     channel: "slack",
     accountId: account.accountId,
   });
-  const chunks = markdownToSlackMrkdwnChunks(trimmedMessage, chunkLimit, { tableMode });
+  const chunkMode = resolveChunkMode(cfg, "slack", account.accountId);
+  const markdownChunks =
+    chunkMode === "newline"
+      ? chunkMarkdownTextWithMode(trimmedMessage, chunkLimit, chunkMode)
+      : [trimmedMessage];
+  const chunks = markdownChunks.flatMap((markdown) =>
+    markdownToSlackMrkdwnChunks(markdown, chunkLimit, { tableMode }),
+  );
+  if (!chunks.length && trimmedMessage) chunks.push(trimmedMessage);
   const mediaMaxBytes =
     typeof account.config.mediaMaxMb === "number"
       ? account.config.mediaMaxMb * 1024 * 1024