A retail-investor web app that scores whether a company will actually deliver on claims made in earnings calls and press articles. Bloomberg-terminal register, real Claude API backend.

pnpm install
pnpm dev

Open http://localhost:3000 — you'll be redirected to /live.

• /live — Live Mode. YouTube earnings call + streaming claim list + credibility score.
• /depth — Depth Mode. 2x2 WIP analysis grid (Background / Past / Present / Future) → Overview with verdict.

• Backend with Claude API. A FastAPI backend in backend/ calls the Claude API (Anthropic) to generate real credibility scores, claim analysis, and feed lines. Run it with pnpm dev:backend (requires ANTHROPIC_API_KEY in backend/.env). The Next route handlers at /api/live-stream and /api/depth-stream proxy to this backend.
• Streaming. AI SDK v6 createUIMessageStream with typed data-claim / data-feed-line / data-score parts. The client (useChat<AppUIMessage>
  • DefaultChatTransport) is unchanged whether the backend is live or mocked.
• State. Zustand for global UI (selected claim, panel completion, depth view, final score). useChat owns streaming state.
• Stack. Next 16.2 App Router + React 19.2 + Tailwind v4 (CSS-first @theme, OKLCH muted-warm palette) + shadcn/ui + JetBrains Mono. Python 3 FastAPI backend.
• Constraints honored. Sharp edges everywhere (--radius: 0 + global border-radius: 0 !important override). No whole-page scroll — html, body { overflow: hidden }; scroll lives only inside panels.
• Hardcoded MVP values. DEFAULT_VIDEO_ID = "dQw4w9WgXcQ" (placeholder), DEFAULT_COMPANY = Acme Robotics (ACME), DEFAULT_CLAIM is the Q4 2026 margin claim.

# Terminal 1 — frontend + backend together
pnpm dev:all

# Or separately:
pnpm dev           # Next.js frontend
pnpm dev:backend   # FastAPI backend (requires backend/.env with ANTHROPIC_API_KEY)

The backend must be running for real Claude-powered scores. Without it, the Next route handlers fall back to fixture data.