diff --git a/.changeset/fn-7317-mobile-planning-summary.md b/.changeset/fn-7317-mobile-planning-summary.md
new file mode 100644
index 0000000000..0881a44495
--- /dev/null
+++ b/.changeset/fn-7317-mobile-planning-summary.md
@@ -0,0 +1,7 @@
+---
+"@runfusion/fusion": patch
+---
+
+summary: Fix mobile Planning Mode summary description Expand and Collapse controls.
+category: fix
+dev: Splits the summary description label from adjacent Markdown and Expand controls and adds mobile regression coverage.
diff --git a/packages/dashboard/app/components/PlanningModeModal.css b/packages/dashboard/app/components/PlanningModeModal.css
index 1d79b4a2f5..9a1213a03e 100644
--- a/packages/dashboard/app/components/PlanningModeModal.css
+++ b/packages/dashboard/app/components/PlanningModeModal.css
@@ -1127,13 +1127,25 @@ An empty footer must NOT reserve vertical space or paint its divider band. When
   gap: var(--space-sm);
 }
 
-.planning-expand-btn {
+.planning-summary-description-header {
+  display: flex;
+  align-items: center;
+  gap: var(--space-sm);
+}
+
+.planning-summary-description-actions {
+  display: flex;
+  align-items: center;
+  gap: var(--space-md);
   margin-left: auto;
+}
+
+.planning-expand-btn {
   padding: 0;
   background: none;
   border: none;
   color: var(--todo);
-  font-size: 12px;
+  font-size: calc(var(--space-sm) + var(--space-xs));
   font-weight: 500;
   cursor: pointer;
 }
@@ -1561,6 +1573,16 @@ Tablet embedded Planning keeps the desktop two-pane shell, so the summary footer
     grid-template-columns: minmax(0, 1fr);
   }
 
+  .planning-summary-description-header {
+    align-items: flex-start;
+    flex-wrap: wrap;
+  }
+
+  .planning-summary-description-actions {
+    margin-left: 0;
+    margin-inline-start: auto;
+  }
+
   .planning-example-chips {
     flex-direction: column;
     align-items: stretch;
diff --git a/packages/dashboard/app/components/PlanningModeModal.tsx b/packages/dashboard/app/components/PlanningModeModal.tsx
index 18d6b0e704..29d2aac418 100644
--- a/packages/dashboard/app/components/PlanningModeModal.tsx
+++ b/packages/dashboard/app/components/PlanningModeModal.tsx
@@ -2819,33 +2819,47 @@ function SummaryView({
 
         <div className="planning-summary-form">
           <div className="form-group">
-            <label>
-              {t("planning.description", "Description")}
-              <button
-                type="button"
-                className="planning-expand-btn"
-                aria-pressed={renderMarkdown}
-                aria-label={renderMarkdown ? t("planning.showRawText", "Show raw text") : t("planning.showFormattedMarkdown", "Show formatted markdown")}
-                title={renderMarkdown ? t("planning.showRawText", "Show raw text") : t("planning.showFormattedMarkdown", "Show formatted markdown")}
-                data-testid="planning-description-markdown-toggle"
-                onClick={() => setRenderMarkdown(!renderMarkdown)}
-              >
-                {renderMarkdown ? t("planning.plain", "Plain") : t("planning.markdown", "Markdown")}
-              </button>
-              <button
-                type="button"
-                className="planning-expand-btn"
-                onClick={() => setIsExpanded(!isExpanded)}
-              >
-                {isExpanded ? t("planning.collapse", "Collapse") : t("planning.expand", "Expand")}
-              </button>
-            </label>
+            {/*
+            FNXC:PlanningSummaryMobile 2026-06-30-12:00:
+            Keep Description controls adjacent but outside the label. Mobile browsers can retarget taps from interactive descendants inside labels, which made the Expand/Collapse control appear inert while the textarea/preview state already supported expansion.
+            */}
+            <div className="planning-summary-description-header">
+              <label id="planning-summary-description-label" htmlFor="planning-summary-description">
+                {t("planning.description", "Description")}
+              </label>
+              <div className="planning-summary-description-actions">
+                <button
+                  type="button"
+                  className="planning-expand-btn"
+                  aria-pressed={renderMarkdown}
+                  aria-label={renderMarkdown ? t("planning.showRawText", "Show raw text") : t("planning.showFormattedMarkdown", "Show formatted markdown")}
+                  title={renderMarkdown ? t("planning.showRawText", "Show raw text") : t("planning.showFormattedMarkdown", "Show formatted markdown")}
+                  data-testid="planning-description-markdown-toggle"
+                  onClick={() => setRenderMarkdown(!renderMarkdown)}
+                >
+                  {renderMarkdown ? t("planning.plain", "Plain") : t("planning.markdown", "Markdown")}
+                </button>
+                <button
+                  type="button"
+                  className="planning-expand-btn"
+                  aria-pressed={isExpanded}
+                  aria-label={isExpanded ? t("planning.collapseDescription", "Collapse description") : t("planning.expandDescription", "Expand description")}
+                  onClick={() => setIsExpanded(!isExpanded)}
+                >
+                  {isExpanded ? t("planning.collapse", "Collapse") : t("planning.expand", "Expand")}
+                </button>
+              </div>
+            </div>
             {renderMarkdown ? (
-              <div className={`planning-description-preview markdown-body ${isExpanded ? "expanded" : ""}`}>
+              <div
+                className={`planning-description-preview markdown-body ${isExpanded ? "expanded" : ""}`}
+                aria-labelledby="planning-summary-description-label"
+              >
                 <ReactMarkdown remarkPlugins={[remarkGfm]}>{summary.description}</ReactMarkdown>
               </div>
             ) : (
               <textarea
+                id="planning-summary-description"
                 ref={descriptionAutosizeRef}
                 className={`planning-textarea ${isExpanded ? "expanded" : ""}`}
                 value={summary.description}
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 6b22b10447..e41feeeb87 100644
--- a/packages/dashboard/app/components/__tests__/PlanningModeModal.ui-interactions.test.tsx
+++ b/packages/dashboard/app/components/__tests__/PlanningModeModal.ui-interactions.test.tsx
@@ -104,6 +104,7 @@ vi.mock("../../api", () => ({
   rejectPlan: (...args: any[]) => mockRejectPlan(...args),
   refineTask: (...args: any[]) => mockRefineTask(...args),
   fetchSettings: vi.fn().mockResolvedValue({ modelPresets: [], autoSelectModelPreset: false, defaultPresetBySize: {} }),
+  fetchTaskEffectiveSettings: vi.fn().mockResolvedValue({ modelPresets: [], autoSelectModelPreset: false, defaultPresetBySize: {} }),
   fetchGlobalSettings: vi.fn().mockResolvedValue({}),
   fetchModels: (...args: any[]) => mockFetchModels(...args),
   fetchWorkflowSteps: vi.fn().mockResolvedValue([]),
@@ -213,7 +214,8 @@ describe("PlanningModeModal", () => {
         />
       );
 
-      expect(screen.getByText("Definition")).toBeDefined();
+      expect(screen.getByText("Example task")).toBeDefined();
+      expect(screen.getByRole("button", { name: "Plan" })).toBeDefined();
       expect(container.querySelector(".detail-body")).not.toBeNull();
     });
   });
@@ -937,12 +939,12 @@ describe("PlanningModeModal", () => {
   });
 
   describe("Summary markdown preview toggle", () => {
-    it("toggles description between plain textarea and formatted markdown preview", async () => {
+    async function renderPlanningSummary(description: string) {
       mockConnectPlanningStream.mockImplementationOnce((_sessionId: string, _projectId: string | undefined, handlers: any) => {
         setTimeout(() => {
           handlers.onSummary?.({
             ...mockSummary,
-            description: "## Heading\n\n- item\n\n**bold**",
+            description,
           });
         }, 10);
 
@@ -952,7 +954,7 @@ describe("PlanningModeModal", () => {
         };
       });
 
-      const { container } = render(
+      const result = render(
         <PlanningModeModal
           isOpen={true}
           onClose={mockOnClose}
@@ -971,6 +973,12 @@ describe("PlanningModeModal", () => {
         expect(screen.getByText("Planning Complete!")).toBeDefined();
       });
 
+      return result;
+    }
+
+    it("toggles description between plain textarea and formatted markdown preview", async () => {
+      const { container } = await renderPlanningSummary("## Heading\n\n- item\n\n**bold**");
+
       expect(container.querySelector(".planning-textarea")).not.toBeNull();
       expect(container.querySelector(".planning-description-preview")).toBeNull();
 
@@ -988,6 +996,55 @@ describe("PlanningModeModal", () => {
         expect(container.querySelector(".planning-textarea")).not.toBeNull();
       });
     });
+
+    it("expands and collapses the mobile summary description without breaking the adjacent markdown toggle", async () => {
+      mockViewport("mobile");
+      const { container } = await renderPlanningSummary(
+        "## Heading\n\n" +
+          "This is a long planning description that should visibly change between collapsed and expanded summary states on mobile.\n\n" +
+          "- Keep markdown available\n" +
+          "- Keep expand available",
+      );
+
+      const markdownToggle = screen.getByTestId("planning-description-markdown-toggle");
+      const expandButton = screen.getByRole("button", { name: "Expand description" });
+      expect(markdownToggle.closest("label")).toBeNull();
+      expect(expandButton.closest("label")).toBeNull();
+
+      const textarea = container.querySelector<HTMLTextAreaElement>(".planning-textarea");
+      expect(textarea).not.toBeNull();
+      expect(textarea?.classList.contains("expanded")).toBe(false);
+
+      fireEvent.click(expandButton);
+
+      await waitFor(() => {
+        expect(screen.getByRole("button", { name: "Collapse description" })).toBeDefined();
+        expect(container.querySelector(".planning-textarea")?.classList.contains("expanded")).toBe(true);
+      });
+
+      fireEvent.click(markdownToggle);
+
+      await waitFor(() => {
+        const preview = container.querySelector(".planning-description-preview");
+        expect(preview).not.toBeNull();
+        expect(preview?.classList.contains("expanded")).toBe(true);
+        expect(screen.getByRole("heading", { level: 2, name: "Heading" })).toBeDefined();
+      });
+
+      fireEvent.click(screen.getByRole("button", { name: "Collapse description" }));
+
+      await waitFor(() => {
+        expect(screen.getByRole("button", { name: "Expand description" })).toBeDefined();
+        expect(container.querySelector(".planning-description-preview")?.classList.contains("expanded")).toBe(false);
+      });
+
+      fireEvent.click(markdownToggle);
+
+      await waitFor(() => {
+        expect(container.querySelector(".planning-textarea")).not.toBeNull();
+        expect(container.querySelector(".planning-description-preview")).toBeNull();
+      });
+    });
   });
 
 });