GWEN (Next.js)

Next.js playground for testing Strands TypeScript sub-agent handoff with streaming and tool calls.

Stack

• Next.js App Router
• API route at app/api/chat/route.ts (no separate Express server)
• @strands-agents/sdk linked locally from ../sdk-typescript-with-subagents

Setup

1. Install dependencies:

pnpm install

2. Configure env:

cp .env.example .env.local
# set GEMINI_API_KEY

3. Run:

pnpm dev

Open: http://localhost:3000

Behavior to test

• Main agent tool call indicators
• Transfer indicator (main_agent -> math_specialist)
• Subagent tool call indicators
• Markdown assistant rendering
• Enter to send, Shift+Enter for newline
• New Session button resets conversation/session