Financial App Building (Zero-Parsing Architecture)

When to use this skill

• Building or refactoring stock-terminal-next.
• Implementing AI Chat interfaces in financial apps.
• When the user mentions "Zero-Parsing", "Protocol Fragility", or "Vercel AI SDK".
• Streaming structured data (charts, widgets) alongside text.

Workflow

[ ] Backend: Implement AIStreamProtocol in FastAPI (SSE with Type Codes 0, 2, 9). [ ] Agent: Use Gemini 3.0/1.5 with Pydantic schemas (structured output) to enforce valid JSON for widgets. [ ] Frontend: Use ai/react (useChat) and zustand (State) instead of manual fetch loops. [ ] Testing: Verify streaming protocol using httpx (backend) and msw (frontend).

Instructions