diff --git a/src/slack/monitor/events/interactions.test.ts b/src/slack/monitor/events/interactions.test.ts
index c94f10d04..15b895a49 100644
--- a/src/slack/monitor/events/interactions.test.ts
+++ b/src/slack/monitor/events/interactions.test.ts
@@ -707,7 +707,15 @@ describe("registerSlackInteractionEvents", () => {
                   type: "rich_text_input",
                   rich_text_value: {
                     type: "rich_text",
-                    elements: [{ type: "rich_text_section", elements: [] }],
+                    elements: [
+                      {
+                        type: "rich_text_section",
+                        elements: [
+                          { type: "text", text: "Ship this now" },
+                          { type: "text", text: "with canary metrics" },
+                        ],
+                      },
+                    ],
                   },
                 },
               },
@@ -736,6 +744,7 @@ describe("registerSlackInteractionEvents", () => {
         inputEmail?: string;
         inputUrl?: string;
         richTextValue?: unknown;
+        richTextPreview?: string;
       }>;
     };
     expect(payload.inputs).toEqual(
@@ -791,15 +800,72 @@ describe("registerSlackInteractionEvents", () => {
         expect.objectContaining({
           actionId: "richtext_input",
           inputKind: "rich_text",
+          richTextPreview: "Ship this now with canary metrics",
           richTextValue: {
             type: "rich_text",
-            elements: [{ type: "rich_text_section", elements: [] }],
+            elements: [
+              {
+                type: "rich_text_section",
+                elements: [
+                  { type: "text", text: "Ship this now" },
+                  { type: "text", text: "with canary metrics" },
+                ],
+              },
+            ],
           },
         }),
       ]),
     );
   });
 
+  it("truncates rich text preview to keep payload summaries compact", async () => {
+    enqueueSystemEventMock.mockReset();
+    const { ctx, getViewHandler } = createContext();
+    registerSlackInteractionEvents({ ctx: ctx as never });
+    const viewHandler = getViewHandler();
+    expect(viewHandler).toBeTruthy();
+
+    const longText = "deploy ".repeat(40).trim();
+    const ack = vi.fn().mockResolvedValue(undefined);
+    await viewHandler!({
+      ack,
+      body: {
+        user: { id: "U555" },
+        view: {
+          id: "V555",
+          callback_id: "openclaw:long_richtext",
+          state: {
+            values: {
+              richtext_block: {
+                richtext_input: {
+                  type: "rich_text_input",
+                  rich_text_value: {
+                    type: "rich_text",
+                    elements: [
+                      {
+                        type: "rich_text_section",
+                        elements: [{ type: "text", text: longText }],
+                      },
+                    ],
+                  },
+                },
+              },
+            },
+          },
+        },
+      },
+    });
+
+    expect(ack).toHaveBeenCalled();
+    const [eventText] = enqueueSystemEventMock.mock.calls[0] as [string];
+    const payload = JSON.parse(eventText.replace("Slack interaction: ", "")) as {
+      inputs: Array<{ actionId: string; richTextPreview?: string }>;
+    };
+    const richInput = payload.inputs.find((input) => input.actionId === "richtext_input");
+    expect(richInput?.richTextPreview).toBeTruthy();
+    expect((richInput?.richTextPreview ?? "").length).toBeLessThanOrEqual(120);
+  });
+
   it("captures modal close events and enqueues view closed event", async () => {
     enqueueSystemEventMock.mockReset();
     const { ctx, getViewClosedHandler, resolveSessionKey } = createContext();
diff --git a/src/slack/monitor/events/interactions.ts b/src/slack/monitor/events/interactions.ts
index c2ee8f523..0917d45f5 100644
--- a/src/slack/monitor/events/interactions.ts
+++ b/src/slack/monitor/events/interactions.ts
@@ -38,6 +38,7 @@ type InteractionSummary = {
   inputEmail?: string;
   inputUrl?: string;
   richTextValue?: unknown;
+  richTextPreview?: string;
   userId?: string;
   teamId?: string;
   triggerId?: string;
@@ -66,6 +67,7 @@ type ModalInputSummary = {
   inputEmail?: string;
   inputUrl?: string;
   richTextValue?: unknown;
+  richTextPreview?: string;
 };
 
 function readOptionValues(options: unknown): string[] | undefined {
@@ -107,6 +109,35 @@ function uniqueNonEmptyStrings(values: string[]): string[] {
   return unique;
 }
 
+function collectRichTextFragments(value: unknown, out: string[]): void {
+  if (!value || typeof value !== "object") {
+    return;
+  }
+  const typed = value as { text?: unknown; elements?: unknown };
+  if (typeof typed.text === "string" && typed.text.trim().length > 0) {
+    out.push(typed.text.trim());
+  }
+  if (Array.isArray(typed.elements)) {
+    for (const child of typed.elements) {
+      collectRichTextFragments(child, out);
+    }
+  }
+}
+
+function summarizeRichTextPreview(value: unknown): string | undefined {
+  const fragments: string[] = [];
+  collectRichTextFragments(value, fragments);
+  if (fragments.length === 0) {
+    return undefined;
+  }
+  const joined = fragments.join(" ").replace(/\s+/g, " ").trim();
+  if (!joined) {
+    return undefined;
+  }
+  const max = 120;
+  return joined.length <= max ? joined : `${joined.slice(0, max - 1)}…`;
+}
+
 function summarizeAction(
   action: Record<string, unknown>,
 ): Omit<InteractionSummary, "actionId" | "blockId"> {
@@ -166,6 +197,7 @@ function summarizeAction(
     }
   }
   const richTextValue = actionType === "rich_text_input" ? typed.rich_text_value : undefined;
+  const richTextPreview = summarizeRichTextPreview(richTextValue);
   const inputKind =
     actionType === "number_input"
       ? "number"
@@ -197,6 +229,7 @@ function summarizeAction(
     inputEmail,
     inputUrl,
     richTextValue,
+    richTextPreview,
   };
 }
 
@@ -242,6 +275,9 @@ function formatInteractionSelectionLabel(params: {
   if (typeof params.summary.selectedDateTime === "number") {
     return new Date(params.summary.selectedDateTime * 1000).toISOString();
   }
+  if (params.summary.richTextPreview) {
+    return params.summary.richTextPreview;
+  }
   if (params.summary.value?.trim()) {
     return params.summary.value.trim();
   }