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Alem Tuzlak c089d5969e Merge remote-tracking branch 'origin/main' into worktree-mossy-tumbling-unicorn

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Built-in Agent (TanStack AI) Showcase

CopilotKit's BuiltInAgent in factory mode with TanStack AI as the LLM backend.

The agent runs in-process inside the Next.js API route — there is no separate agent server process to start (unlike the LangGraph TypeScript variant which spawns langgraph-cli on port 8123).

Quick Start

Prerequisites

Node.js 18+
An OpenAI API key

Setup

Clone & install dependencies

npm install

Set environment variables

Create a .env.local file from .env.example:

cp .env.example .env.local

Then fill in your OPENAI_API_KEY:

OPENAI_API_KEY=sk-...
NEXT_PUBLIC_COPILOTKIT_AGENT=default

Start the dev server

npm run dev

Open http://localhost:3000 to see the demo index.

Build

npm run build

Architecture

Agent Factory: See src/lib/factory/tanstack-factory.ts for the BuiltInAgent wiring and TanStack AI integration.
Tools: Defined in:
- src/lib/factory/state-tools.ts — state management tools
- src/lib/factory/server-tools.ts — server-side tools
- src/lib/factory/subagent-tools.ts — sub-agent tools
API Route: src/app/api/copilotkit/[[...slug]]/route.ts handles the AG-UI protocol.

Next Steps

Phase 3+ will add individual demo pages under src/app/demos/.

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