feat(website): link hero workflow capabilities to docs

apps/website/src/components/landing/Hero.spec.tsx

@@ -7,6 +7,7 @@ import {
   HERO_H1,
   HERO_SECONDARY_HREF,
   HERO_SUBHEAD,
+  HERO_SUBHEAD_SEGMENTS,
 } from '../../lib/positioning';
 
 const trackMock = vi.hoisted(() => vi.fn());
@@ -57,10 +58,13 @@ describe('Hero', () => {
     expect(screen.getByRole('heading', { level: 1 }).textContent).toBe(HERO_H1);
     expect(screen.getByText(HERO_EYEBROW)).toBeTruthy();
     expect(document.querySelector('.hero-subhead')?.textContent).toBe(HERO_SUBHEAD);
-    expect(document.querySelector('.hero-subhead .marker-highlight')?.textContent).toBe(
-      'Your backend stays where it is.',
-    );
-    expect(document.querySelectorAll('.hero-subhead .marker-highlight')).toHaveLength(1);
+    expect(document.querySelectorAll('.hero-subhead a.marker-highlight')).toHaveLength(5);
+    for (const segment of HERO_SUBHEAD_SEGMENTS.filter((s) => s.href)) {
+      const link = screen.getByRole('link', { name: segment.text, exact: true });
+      expect(link.getAttribute('href')).toBe(segment.href);
+      expect(link.getAttribute('target')).toBe('_blank');
+      expect(link.getAttribute('rel')).toBe('noopener noreferrer');
+    }
     expect(document.querySelector('.hero-chip-row')).toBeNull();
     expect(screen.queryByText(/six months/)).toBeNull();
     expect(screen.queryByRole('link', { name: /Talk to our engineers/ })).toBeNull();

apps/website/src/components/landing/Hero.tsx

@@ -39,11 +39,11 @@ export function Hero() {
             ))}
           </h1>
           <p className="hero-subhead">
-            {HERO_SUBHEAD_SEGMENTS.map((segment) =>
-              segment.highlight ? (
-                <span className="marker-highlight" key={segment.text}>{segment.text}</span>
+            {HERO_SUBHEAD_SEGMENTS.map((segment, index) =>
+              segment.href ? (
+                <a className="marker-highlight" href={segment.href} target="_blank" rel="noopener noreferrer" key={index}>{segment.text}</a>
               ) : (
-                <React.Fragment key={segment.text}>{segment.text}</React.Fragment>
+                <React.Fragment key={index}>{segment.text}</React.Fragment>
               ),
             )}
           </p>

apps/website/src/lib/positioning.spec.ts

@@ -50,7 +50,7 @@ describe('positioning: hero copy', () => {
     expect(HERO_EYEBROW).toBe('Angular · LangGraph & AG-UI');
     expect(HERO_H1).toBe('The open-source thread-plane for agents.');
     expect(HERO_SUBHEAD).toBe(
-      'Chat, durable threads, persistence, human approvals, and generative UI for Angular, on LangGraph and AG-UI. Your backend stays where it is.',
+      'Make agent work persistent, durable, visible, reviewable, and resumable.',
     );
     expect(HOME_TITLE).toBe('Threadplane — The open-source thread-plane for agents');
     expect(HOME_DESCRIPTION).toBe(
@@ -64,15 +64,15 @@ describe('positioning: hero copy', () => {
     expect(HERO_H1_LINES.join(' ')).toBe(HERO_H1);
   });
 
-  it('subhead segments join back to HERO_SUBHEAD, with exactly one highlight', () => {
-    // The segments exist only so Hero.tsx can marker-highlight one phrase.
-    // If they ever stop reassembling the source-of-truth string, the rendered
-    // subhead silently diverges from the copy every other surface quotes.
+  it('subhead segments preserve the copy and link each capability to its docs', () => {
     expect(HERO_SUBHEAD_SEGMENTS.map((s) => s.text).join('')).toBe(HERO_SUBHEAD);
-    expect(HERO_SUBHEAD_SEGMENTS.filter((s) => s.highlight)).toHaveLength(1);
-    expect(HERO_SUBHEAD_SEGMENTS.find((s) => s.highlight)?.text).toBe(
-      'Your backend stays where it is.',
-    );
+    expect(HERO_SUBHEAD_SEGMENTS.filter((s) => s.href)).toEqual([
+      { text: 'persistent', href: '/docs/langgraph/guides/persistence' },
+      { text: 'durable', href: '/docs/langgraph/guides/persistence#choosing-a-checkpointer' },
+      { text: 'visible', href: '/docs/chat/components/chat-tool-calls' },
+      { text: 'reviewable', href: '/docs/langgraph/guides/interrupts' },
+      { text: 'resumable', href: '/docs/langgraph/guides/persistence#checkpoint-recovery' },
+    ]);
   });
 
   it('pins the hero action labels and the secondary destination', () => {

apps/website/src/lib/positioning.ts

@@ -12,22 +12,30 @@ export const HERO_H1 = 'The open-source thread-plane for agents.';
  */
 export const HERO_H1_LINES: readonly string[] = ['The open-source', 'thread-plane', 'for agents.'];
 export const HERO_SUBHEAD =
-  'Chat, durable threads, persistence, human approvals, and generative UI for Angular, on LangGraph and AG-UI. Your backend stays where it is.';
+  'Make agent work persistent, durable, visible, reviewable, and resumable.';
 
 /**
- * The subhead, split so Hero.tsx can marker-highlight the boundary claim.
+ * The subhead, split so each workflow capability links to its documentation.
  * HERO_SUBHEAD stays the single source of truth: positioning.spec.ts asserts
  * these segments join back to it character for character, so the two cannot
- * drift. Exactly one segment is highlighted — a second one in a sentence this
- * short reads as decoration and cancels the emphasis.
+ * drift. Linked terms retain the hero's ink underline treatment.
  */
 export interface HeroSubheadSegment {
   text: string;
-  highlight?: boolean;
+  href?: string;
 }
 export const HERO_SUBHEAD_SEGMENTS: readonly HeroSubheadSegment[] = [
-  { text: 'Chat, durable threads, persistence, human approvals, and generative UI for Angular, on LangGraph and AG-UI. ' },
-  { text: 'Your backend stays where it is.', highlight: true },
+  { text: 'Make agent work ' },
+  { text: 'persistent', href: '/docs/langgraph/guides/persistence' },
+  { text: ', ' },
+  { text: 'durable', href: '/docs/langgraph/guides/persistence#choosing-a-checkpointer' },
+  { text: ', ' },
+  { text: 'visible', href: '/docs/chat/components/chat-tool-calls' },
+  { text: ', ' },
+  { text: 'reviewable', href: '/docs/langgraph/guides/interrupts' },
+  { text: ', and ' },
+  { text: 'resumable', href: '/docs/langgraph/guides/persistence#checkpoint-recovery' },
+  { text: '.' },
 ];
 
 export const HERO_PRIMARY_LABEL = 'Install Threadplane';

apps/website/src/lib/site-metadata.spec.ts

@@ -22,7 +22,7 @@ describe('site positioning copy', () => {
     expect(LONG_SUBHEAD).toContain('open-source thread-plane for agents');
     expect(LONG_SUBHEAD).toContain('LangGraph and AG-UI');
     expect(HERO_SUBHEAD).toBe(
-      'Chat, durable threads, persistence, human approvals, and generative UI for Angular, on LangGraph and AG-UI. Your backend stays where it is.',
+      'Make agent work persistent, durable, visible, reviewable, and resumable.',
     );
     expect(POSITIONING_PROOF_POINTS.map((p) => p.label)).toEqual([
       'LangGraph + AG-UI',

apps/website/src/styles/landing.css

@@ -84,16 +84,21 @@
 }
 .hero-stack .hero-subhead {
   max-width: 40em;
+  word-spacing: 0.16em;
 }
-/* The centered hero wraps the highlighted boundary claim mid-phrase — measured
- * at 768px it orphaned a lone "Your" in its own pill at the end of line 1, and
- * at 1440px it split into two staggered boxes. inline-block makes the phrase
- * wrap as one unit, so it drops whole onto its own line instead. max-width is
- * the safety valve: below ~360px the phrase is wider than the measure, and
- * without it a shrink-to-fit box would overflow the page rather than wrap. */
+/* Keep each documentation link and its ink underline together when wrapping. */
 .hero-stack .hero-subhead .marker-highlight {
   display: inline-block;
   max-width: 100%;
+  text-decoration: none;
+  word-spacing: normal;
+}
+.hero-stack .hero-subhead a.marker-highlight:hover {
+  box-shadow: inset 0 -5px 0 var(--color-ink);
+}
+.hero-stack .hero-subhead a.marker-highlight:focus-visible {
+  outline: 2px solid var(--color-ink);
+  outline-offset: 5px;
 }
 .hero-stack .hero-cta-row {
   justify-content: center;