Anthropic (Claude)

FlowKit supports Anthropic's Claude models via the AnthropicAdapter.

Setup

export ANTHROPIC_API_KEY=sk-ant-...

Usage

import { AnthropicAdapter } from "@andresaya/flowkit";

const adapter = new AnthropicAdapter({
  apiKey: process.env.ANTHROPIC_API_KEY!,
  model: "claude-3-5-sonnet-20241022",
});

const engine = new FlowEngine(flow, { llm: adapter, storage });

Configuration

interface AnthropicConfig {
  /** Anthropic API key (required) */
  apiKey: string;
  /** Model to use (default: claude-3-5-sonnet-20241022) */
  model?: string;
  /** Max tokens (default: 4096) */
  maxTokens?: number;
  /** Temperature (default: 0) */
  temperature?: number;
  /** Timeout in ms (default: 60000) */
  timeout?: number;
  /** Base URL (default: https://api.anthropic.com) */
  baseUrl?: string;
  /** Enable streaming (default: false) */
  streaming?: boolean;
}

Available Models

Model	Best For	Cost
claude-3-5-sonnet-20241022	Best balance (recommended)	$$
claude-3-5-haiku-20241022	Fast and cheap	$
claude-3-opus-20240229	Most capable	$$$

Streaming

Enable streaming for real-time responses:

const adapter = new AnthropicAdapter({
  apiKey: process.env.ANTHROPIC_API_KEY!,
  model: "claude-3-5-sonnet-20241022",
  streaming: true,
});

Example

import { 
  agent, flow, FlowEngine, MemoryStorage, AnthropicAdapter, 
  name, yesNo 
} from "@andresaya/flowkit";

const bot = agent("Alex")
  .company("MyCompany")
  .personality("helpful and thoughtful")
  .build();

const myFlow = flow("greeting", bot)
  .ask("name", "What's your name?", name(), "user_name")
  .then("confirm")
  .ask("confirm", "Nice to meet you {{user_name}}! Need help?", yesNo(), "needs_help")
  .when({ yes: "help", no: "bye" })
  .say("help", "How can I help?")
  .done()
  .say("bye", "Goodbye!")
  .done()
  .build();

const engine = new FlowEngine(myFlow, {
  llm: new AnthropicAdapter({
    apiKey: process.env.ANTHROPIC_API_KEY!,
    model: "claude-3-5-sonnet-20241022",
  }),
  storage: new MemoryStorage(),
});

const result = await engine.start("session-1");
console.log(result.message);

Features

Feature	Supported
Streaming	Yes
Tool Calling	Yes
JSON Mode	Yes

Tips

1. Use Sonnet for most use cases - Best balance of speed and quality
2. Claude is excellent for reasoning - Great for complex conversation flows
3. Enable streaming - Better user experience with real-time responses
4. Set temperature to 0 - For deterministic responses