diff --git a/CHANGELOG.md b/CHANGELOG.md
index 34d05e06c4e..67afe89281e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Slack: recover full inbound DM text from top-level rich-text blocks when Slack sends a shortened message preview, so long direct messages still reach the agent intact. Fixes #55358. Thanks @tonyjwinter.
 - Replies: strip legacy `[TOOL_CALL]{tool => ..., args => ...}[/TOOL_CALL]` pseudo-call text from user-facing replies and flag it in tool-call diagnostics instead of showing raw tool syntax in channels. Fixes #63610. Thanks @canh0chua.
 - WhatsApp: close long-lived web sockets through Baileys `end(error)` before falling back to raw websocket close, so listener teardown runs Baileys cleanup instead of leaving zombie sockets. Fixes #52442. Thanks @essendigitalgroup-cyber.
 - Twitch/plugins: emit a flat JSON Schema for Twitch channel config so single-account and multi-account configs validate before runtime load, and add source-checkout diagnostics for missing pnpm workspace dependencies. Thanks @vincentkoc.
diff --git a/extensions/slack/src/monitor/message-handler/prepare-content.ts b/extensions/slack/src/monitor/message-handler/prepare-content.ts
index 94905c3a538..da130e73fac 100644
--- a/extensions/slack/src/monitor/message-handler/prepare-content.ts
+++ b/extensions/slack/src/monitor/message-handler/prepare-content.ts
@@ -14,6 +14,31 @@ type SlackResolvedMessageContent = {
 const SLACK_MENTION_RESOLUTION_CONCURRENCY = 4;
 const SLACK_MENTION_RESOLUTION_MAX_LOOKUPS_PER_MESSAGE = 20;
 
+type SlackTextObject = {
+  text?: unknown;
+};
+
+type SlackRichTextElement = {
+  type?: unknown;
+  text?: unknown;
+  url?: unknown;
+  user_id?: unknown;
+  channel_id?: unknown;
+  usergroup_id?: unknown;
+  name?: unknown;
+  range?: unknown;
+  elements?: unknown;
+};
+
+type SlackBlockLike = {
+  type?: unknown;
+  text?: unknown;
+  elements?: unknown;
+  fields?: unknown;
+  alt_text?: unknown;
+  title?: unknown;
+};
+
 type SlackMediaModule = typeof import("../media.js");
 let slackMediaModulePromise: Promise<SlackMediaModule> | undefined;
 
@@ -54,6 +79,152 @@ function renderSlackUserMentions(
   });
 }
 
+function readString(value: unknown): string | undefined {
+  return typeof value === "string" ? value : undefined;
+}
+
+function readTextObject(value: unknown): string | undefined {
+  if (!value || typeof value !== "object") {
+    return undefined;
+  }
+  return normalizeOptionalString(readString((value as SlackTextObject).text));
+}
+
+function renderSlackRichTextLeaf(element: SlackRichTextElement): string {
+  switch (element.type) {
+    case "text":
+      return readString(element.text) ?? "";
+    case "link":
+      return readString(element.text) ?? readString(element.url) ?? "";
+    case "user": {
+      const userId = readString(element.user_id);
+      return userId ? `<@${userId}>` : "";
+    }
+    case "channel": {
+      const channelId = readString(element.channel_id);
+      return channelId ? `<#${channelId}>` : "";
+    }
+    case "usergroup": {
+      const usergroupId = readString(element.usergroup_id);
+      return usergroupId ? `<!subteam^${usergroupId}>` : "";
+    }
+    case "broadcast": {
+      const range = readString(element.range);
+      return range ? `<!${range}>` : "";
+    }
+    case "emoji": {
+      const name = readString(element.name);
+      return name ? `:${name}:` : "";
+    }
+    default:
+      return "";
+  }
+}
+
+function renderSlackRichTextElements(elements: unknown): string {
+  if (!Array.isArray(elements)) {
+    return "";
+  }
+  const parts: string[] = [];
+  for (const rawElement of elements) {
+    if (!rawElement || typeof rawElement !== "object") {
+      continue;
+    }
+    const element = rawElement as SlackRichTextElement;
+    switch (element.type) {
+      case "rich_text_section":
+      case "rich_text_preformatted":
+      case "rich_text_quote": {
+        parts.push(renderSlackRichTextElements(element.elements));
+        break;
+      }
+      case "rich_text_list": {
+        const listText = Array.isArray(element.elements)
+          ? element.elements
+              .map((child) =>
+                child && typeof child === "object"
+                  ? renderSlackRichTextElements((child as SlackRichTextElement).elements)
+                  : "",
+              )
+              .filter(Boolean)
+              .join("\n")
+          : "";
+        parts.push(listText);
+        break;
+      }
+      default:
+        parts.push(renderSlackRichTextLeaf(element));
+        break;
+    }
+  }
+  return parts.join("");
+}
+
+function readSlackBlockText(block: unknown): string | undefined {
+  if (!block || typeof block !== "object") {
+    return undefined;
+  }
+  const blockLike = block as SlackBlockLike;
+  switch (blockLike.type) {
+    case "rich_text":
+      return normalizeOptionalString(renderSlackRichTextElements(blockLike.elements));
+    case "section": {
+      const text = readTextObject(blockLike.text);
+      if (text) {
+        return text;
+      }
+      if (Array.isArray(blockLike.fields)) {
+        const fields = blockLike.fields.map(readTextObject).filter(Boolean);
+        return fields.length > 0 ? fields.join("\n") : undefined;
+      }
+      return undefined;
+    }
+    case "header":
+      return readTextObject(blockLike.text);
+    case "context": {
+      if (!Array.isArray(blockLike.elements)) {
+        return undefined;
+      }
+      const parts = blockLike.elements.map(readTextObject).filter(Boolean);
+      return parts.length > 0 ? parts.join(" ") : undefined;
+    }
+    case "image":
+      return (
+        normalizeOptionalString(readString(blockLike.alt_text)) ?? readTextObject(blockLike.title)
+      );
+    case "video":
+      return (
+        readTextObject(blockLike.title) ?? normalizeOptionalString(readString(blockLike.alt_text))
+      );
+    default:
+      return undefined;
+  }
+}
+
+function resolveSlackBlocksText(blocks: unknown[] | undefined): string | undefined {
+  if (!blocks?.length) {
+    return undefined;
+  }
+  const parts = blocks.map(readSlackBlockText).filter(Boolean);
+  return parts.length > 0 ? parts.join("\n") : undefined;
+}
+
+function chooseSlackPrimaryText(params: {
+  messageText: string | undefined;
+  blocksText: string | undefined;
+}): string | undefined {
+  const { messageText, blocksText } = params;
+  if (!blocksText) {
+    return messageText;
+  }
+  if (!messageText) {
+    return blocksText;
+  }
+  return blocksText.length > messageText.length && blocksText.startsWith(messageText)
+    ? blocksText
+    : messageText;
+}
+
 function filterInheritedParentFiles(params: {
   files: SlackFile[] | undefined;
   isThreadReply: boolean;
@@ -143,11 +314,12 @@ export async function resolveSlackMessageContent(params: {
           .join("\n")
       : undefined;
 
-  const textParts = [
-    normalizeOptionalString(params.message.text),
-    attachmentContent?.text,
-    botAttachmentText,
-  ];
+  const blocksText = resolveSlackBlocksText(params.message.blocks);
+  const primaryText = chooseSlackPrimaryText({
+    messageText: normalizeOptionalString(params.message.text),
+    blocksText,
+  });
+  const textParts = [primaryText, attachmentContent?.text, botAttachmentText];
   const renderedMentions = new Map<string, string | null>();
   const resolveUserName = params.resolveUserName;
   if (resolveUserName) {
diff --git a/extensions/slack/src/monitor/message-handler/prepare.test.ts b/extensions/slack/src/monitor/message-handler/prepare.test.ts
index 0e6d8332747..f5988d4fbdc 100644
--- a/extensions/slack/src/monitor/message-handler/prepare.test.ts
+++ b/extensions/slack/src/monitor/message-handler/prepare.test.ts
@@ -409,6 +409,33 @@ describe("slack prepareSlackMessage inbound contract", () => {
     expect(prepared!.ctxPayload.RawBody).toContain("[Forwarded message from Bob]\nForwarded hello");
   });
 
+  it("recovers full Slack DM text from top-level rich text blocks when text is only a preview", async () => {
+    const preview = "Yo Molty what is uppppp ".repeat(7).slice(0, 160);
+    const fullText = `${preview}and this tail should still reach the agent`;
+
+    const prepared = await prepareWithDefaultCtx(
+      createSlackMessage({
+        text: preview,
+        blocks: [
+          {
+            type: "rich_text",
+            block_id: "b1",
+            elements: [
+              {
+                type: "rich_text_section",
+                elements: [{ type: "text", text: fullText }],
+              },
+            ],
+          },
+        ],
+      }),
+    );
+
+    expect(prepared).toBeTruthy();
+    expect(prepared!.ctxPayload.RawBody).toBe(fullText);
+    expect(prepared!.ctxPayload.BodyForAgent).toContain(fullText);
+  });
+
   it("ignores non-forward attachments when no direct text/files are present", async () => {
     const prepared = await prepareWithDefaultCtx(
       createSlackMessage({
diff --git a/extensions/slack/src/types.ts b/extensions/slack/src/types.ts
index 6de9fcb5a2d..889bf189c0f 100644
--- a/extensions/slack/src/types.ts
+++ b/extensions/slack/src/types.ts
@@ -41,6 +41,7 @@ export type SlackMessageEvent = {
   parent_user_id?: string;
   channel: string;
   channel_type?: "im" | "mpim" | "channel" | "group";
+  blocks?: unknown[];
   files?: SlackFile[];
   attachments?: SlackAttachment[];
 };