Add support for OpenRouter and AWS Bedrock

src/api/anthropic.ts

@@ -0,0 +1,34 @@
+import { Anthropic } from "@anthropic-ai/sdk"
+import { ApiHandler } from "."
+import { ApiHandlerOptions } from "../shared/api"
+
+export class AnthropicHandler implements ApiHandler {
+	private options: ApiHandlerOptions
+	private client: Anthropic
+
+	constructor(options: ApiHandlerOptions) {
+		this.options = options
+		this.client = new Anthropic({ apiKey: this.options.apiKey })
+	}
+
+	async createMessage(
+		systemPrompt: string,
+		messages: Anthropic.Messages.MessageParam[],
+		tools: Anthropic.Messages.Tool[]
+	): Promise<Anthropic.Messages.Message> {
+		return await this.client.messages.create(
+			{
+				model: "claude-3-5-sonnet-20240620", // https://docs.anthropic.com/en/docs/about-claude/models
+				max_tokens: 8192, // beta max tokens
+				system: systemPrompt,
+				messages,
+				tools,
+				tool_choice: { type: "auto" },
+			},
+			{
+				// https://github.com/anthropics/anthropic-sdk-typescript?tab=readme-ov-file#default-headers
+				headers: { "anthropic-beta": "max-tokens-3-5-sonnet-2024-07-15" },
+			}
+		)
+	}
+}