diff --git a/apps/web/src/components/NewAutomationModal.tsx b/apps/web/src/components/NewAutomationModal.tsx
index 0f345319c..4e52e2d12 100644
--- a/apps/web/src/components/NewAutomationModal.tsx
+++ b/apps/web/src/components/NewAutomationModal.tsx
@@ -818,6 +818,7 @@ export function NewAutomationModal({
                             setPopover(null);
                           }}
                           label={p.name}
+                          title={p.name}
                         />
                       ))}
                     </>
@@ -1018,17 +1019,24 @@ function PopoverItem({
   label,
   hint,
   onClick,
+  title,
 }: {
   selected?: boolean;
   label: string;
   hint?: string;
   onClick: () => void;
+  // Native hover tooltip surfaced when the visible label is truncated to
+  // ellipsis (e.g. long project names in the picker, #3274). Optional so
+  // unchanged call sites with short fixed labels don't grow a noisy
+  // duplicate tooltip.
+  title?: string;
 }) {
   return (
     <button
       type="button"
       className={`automation-popover__item${selected ? ' is-selected' : ''}`}
       onClick={onClick}
+      title={title}
     >
       <span className="automation-popover__check">
         {selected ? <Icon name="check" size={12} /> : null}
diff --git a/apps/web/src/styles/home/tasks.css b/apps/web/src/styles/home/tasks.css
index 74ab22451..3991463b5 100644
--- a/apps/web/src/styles/home/tasks.css
+++ b/apps/web/src/styles/home/tasks.css
@@ -1444,6 +1444,20 @@
   font-size: 12.5px;
   font-weight: 680;
   color: var(--text-strong);
+  /*
+   * Single-line truncate with ellipsis (#3274). Long project names in the
+   * "Existing projects" section of the automation project picker used to
+   * wrap across multiple lines, blowing up each row's height and making
+   * the dropdown hard to scan. The parent `.automation-popover__body`
+   * already sets `min-width: 0` so the flex child can shrink below its
+   * intrinsic content width — these three properties complete the
+   * standard truncate triad. The full name is preserved via the row's
+   * `title` attribute (set by the picker call site) so it remains
+   * discoverable via the native hover tooltip.
+   */
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
 }
 
 .automation-popover__hint {
diff --git a/apps/web/tests/components/NewAutomationModal.project-picker.test.tsx b/apps/web/tests/components/NewAutomationModal.project-picker.test.tsx
new file mode 100644
index 000000000..2c75c7516
--- /dev/null
+++ b/apps/web/tests/components/NewAutomationModal.project-picker.test.tsx
@@ -0,0 +1,80 @@
+// @vitest-environment jsdom
+//
+// Regression for #3274. The automation project picker rendered long project
+// names verbatim with no truncate styling, so a single long name blew up
+// each row's height and made the dropdown messy to scan. The fix adds the
+// single-line truncate-with-ellipsis CSS triad to `.automation-popover__label`
+// and threads each project's full name through to the row's `title`
+// attribute so the native hover tooltip still surfaces it. The CSS half
+// is verified by code review (jsdom does not apply stylesheets); this
+// test locks in the DOM contract — every existing-project row must carry
+// `title=<full name>` so the tooltip exists even when the visible label
+// is clipped.
+
+import { cleanup, fireEvent, render, screen } from '@testing-library/react';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+import { NewAutomationModal } from '../../src/components/NewAutomationModal';
+import { listPlugins } from '../../src/state/projects';
+import { fetchMcpServers } from '../../src/state/mcp';
+
+vi.mock('../../src/state/projects', () => ({
+  listPlugins: vi.fn().mockResolvedValue([]),
+}));
+
+vi.mock('../../src/state/mcp', () => ({
+  fetchMcpServers: vi.fn().mockResolvedValue({ servers: [], templates: [] }),
+}));
+
+afterEach(() => {
+  cleanup();
+  vi.resetAllMocks();
+});
+
+describe('NewAutomationModal project picker', () => {
+  it('exposes each project\'s full name as the row title so truncated labels still surface via tooltip (#3274)', () => {
+    const longName = 'A very long project name that would otherwise wrap onto several lines inside the automation picker';
+    render(
+      <NewAutomationModal
+        open
+        templates={[]}
+        projects={[
+          { id: 'p-1', name: longName },
+          { id: 'p-2', name: 'Short' },
+        ]}
+        skills={[]}
+        connectors={[]}
+        onClose={() => undefined}
+        onSaved={() => undefined}
+      />,
+    );
+
+    // Open the project popover. It is the only PillButton on the row that
+    // toggles `popover === 'project'`; the visible label is the current
+    // selection ("New project each run" by default) but the button still
+    // shows the project icon, which we use as a stable accessible cue.
+    const projectButton =
+      screen.getByRole('button', { name: /New project each run/i });
+    fireEvent.click(projectButton);
+
+    // Both project rows render, each with `title=<full name>` on the
+    // button so the native tooltip preserves the full project name even
+    // when the visible label is clipped by the ellipsis CSS.
+    const longRow = screen.getByRole('button', { name: longName });
+    expect(longRow.getAttribute('title')).toBe(longName);
+    const shortRow = screen.getByRole('button', { name: 'Short' });
+    expect(shortRow.getAttribute('title')).toBe('Short');
+
+    // PopoverItems with fixed in-product copy ("New project each run")
+    // intentionally do NOT carry a tooltip; the truncate optimisation
+    // is project-name-specific.
+    const fixedRows = screen.getAllByRole('button', {
+      name: /New project each run/i,
+    });
+    // The first match is the PillButton trigger we just clicked; the
+    // second is the PopoverItem inside the open popover.
+    expect(fixedRows.length).toBeGreaterThanOrEqual(2);
+    const popoverFixedRow = fixedRows.at(-1);
+    expect(popoverFixedRow?.getAttribute('title')).toBeNull();
+  });
+});