diff --git a/.changeset/fix-mobile-planning-summary-spaces.md b/.changeset/fix-mobile-planning-summary-spaces.md
new file mode 100644
index 0000000000..fdcbce5b66
--- /dev/null
+++ b/.changeset/fix-mobile-planning-summary-spaces.md
@@ -0,0 +1,7 @@
+---
+"@runfusion/fusion": patch
+---
+
+summary: Fix mobile Planning Mode description editing so spaces can be entered.
+category: fix
+dev: Guards Planning Mode summary normalization so editable fields keep normal text input.
diff --git a/packages/dashboard/app/components/PlanningModeModal.tsx b/packages/dashboard/app/components/PlanningModeModal.tsx
index 29d2aac418..8012151ab7 100644
--- a/packages/dashboard/app/components/PlanningModeModal.tsx
+++ b/packages/dashboard/app/components/PlanningModeModal.tsx
@@ -142,8 +142,13 @@ function normalizePlanningSummary(summary: PlanningSummary): PlanningSummary {
   const title = typeof raw.title === "string" && raw.title.trim().length > 0
     ? raw.title.trim()
     : "Untitled planning task";
-  const description = typeof raw.description === "string" && raw.description.trim().length > 0
-    ? raw.description.trim()
+  /*
+  FNXC:PlanningMode 2026-06-30-12:54:
+  Final summary description is an editable draft. Preserve internal and trailing whitespace during render so mobile text entry can insert a space before the next word; only whitespace-only server payloads fall back to the normalized title.
+  */
+  const rawDescription = typeof raw.description === "string" ? raw.description : "";
+  const description = rawDescription.trim().length > 0
+    ? rawDescription
     : title;
   return {
     ...summary,
diff --git a/packages/dashboard/app/components/__tests__/PlanningModeModal.ui-interactions.test.tsx b/packages/dashboard/app/components/__tests__/PlanningModeModal.ui-interactions.test.tsx
index e41feeeb87..b7ab1d76fa 100644
--- a/packages/dashboard/app/components/__tests__/PlanningModeModal.ui-interactions.test.tsx
+++ b/packages/dashboard/app/components/__tests__/PlanningModeModal.ui-interactions.test.tsx
@@ -25,6 +25,7 @@ vi.mock("../../hooks/useNavigationHistory", async (importOriginal) => {
   };
 });
 import { act, render, renderHook, screen, fireEvent, waitFor, within } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
 import * as api from "../../api";
 import { PlanningModeModal } from "../PlanningModeModal";
 import { TaskDetailModal } from "../TaskDetailModal";
@@ -997,6 +998,25 @@ describe("PlanningModeModal", () => {
       });
     });
 
+    it.each([
+      { viewport: "mobile" as const, typedDescription: "Mobile summary accepts spaces" },
+      { viewport: "desktop" as const, typedDescription: "Desktop summary accepts spaces" },
+    ])("preserves typed spaces in the $viewport summary description textarea", async ({ viewport, typedDescription }) => {
+      mockViewport(viewport);
+      const user = userEvent.setup();
+      await renderPlanningSummary("Generated summary with existing words");
+
+      const textarea = screen.getByLabelText("Description") as HTMLTextAreaElement;
+      textarea.focus();
+      textarea.setSelectionRange(0, textarea.value.length);
+      await user.type(textarea, typedDescription);
+
+      expect(textarea.value).toContain(typedDescription);
+      expect(textarea.value).not.toContain(typedDescription.replaceAll(" ", ""));
+      expect(screen.getByRole("button", { name: /Create Single Task/i })).toBeDefined();
+      expect(screen.getByRole("button", { name: /Break into Tasks/i })).toBeDefined();
+    });
+
     it("expands and collapses the mobile summary description without breaking the adjacent markdown toggle", async () => {
       mockViewport("mobile");
       const { container } = await renderPlanningSummary(