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* AgentKits — Tool Calling Module
*
* Unified function/tool calling adapter across providers.
* Normalizes OpenAI, Gemini, DeepSeek, DashScope tool call formats.
*
* Usage:
* import { createToolChat } from 'agentkits/tools';
* const chat = createToolChat({ provider: 'deepseek', tools: [...] });
* const result = await chat.run('What is the weather in Beijing?');
*/
import OpenAI from 'openai';
import type { ChatCompletionMessageParam, ChatCompletionTool } from 'openai/resources/chat/completions';
// ── Types ──────────────────────────────────────────────────────────
export interface ToolDefinition {
name: string;
description: string;
parameters: Record<string, any>; // JSON Schema
}
export interface ToolCall {
id: string;
name: string;
arguments: Record<string, any>;
}
export interface ToolResult {
toolCallId: string;
result: string;
}
export interface ToolChatConfig {
provider?: string;
model?: string;
apiKey?: string;
baseUrl?: string;
tools: ToolDefinition[];
/** Function to execute tool calls. Return string result. */
execute?: (name: string, args: Record<string, any>) => Promise<string>;
temperature?: number;
maxTokens?: number;
/** Max tool call rounds before stopping (default: 5) */
maxRounds?: number;
}
export interface ToolChatResponse {
content: string;
toolCalls: ToolCall[];
toolResults: ToolResult[];
rounds: number;
usage?: {
promptTokens: number;
completionTokens: number;
totalTokens: number;
};
}
export interface ToolChatClient {
/** Run a message with tool calling. Auto-executes tools if execute() is provided. */
run(prompt: string, options?: { system?: string }): Promise<ToolChatResponse>;
/** Single step: get tool calls without executing */
step(messages: Array<{ role: string; content: string }>): Promise<{
content: string | null;
toolCalls: ToolCall[];
}>;
/** Current resolved tools */
readonly tools: readonly ToolDefinition[];
}
// ── Provider Config (reuse from llm module) ────────────────────────
const PROVIDER_URLS: Record<string, string> = {
openai: 'https://api.openai.com/v1',
gemini: 'https://generativelanguage.googleapis.com/v1beta/openai/',
ollama: 'http://localhost:11434/v1',
dashscope: 'https://dashscope.aliyuncs.com/compatible-mode/v1',
deepseek: 'https://api.deepseek.com/v1',
zhipu: 'https://open.bigmodel.cn/api/paas/v4',
moonshot: 'https://api.moonshot.cn/v1',
minimax: 'https://api.minimax.chat/v1',
};
const PROVIDER_MODELS: Record<string, string> = {
openai: 'gpt-4o', gemini: 'gemini-2.5-flash', ollama: 'llama3.3',
dashscope: 'qwen-max', deepseek: 'deepseek-chat', zhipu: 'glm-4-plus',
moonshot: 'moonshot-v1-auto', minimax: 'MiniMax-Text-01',
};
const PROVIDER_KEYS: Record<string, string[]> = {
openai: ['OPENAI_API_KEY'], gemini: ['GEMINI_API_KEY', 'GOOGLE_API_KEY'],
ollama: [], dashscope: ['DASHSCOPE_API_KEY'], deepseek: ['DEEPSEEK_API_KEY'],
zhipu: ['ZHIPU_API_KEY'], moonshot: ['MOONSHOT_API_KEY'], minimax: ['MINIMAX_API_KEY'],
};
// ── Factory ────────────────────────────────────────────────────────
export function createToolChat(config: ToolChatConfig): ToolChatClient {
const provider = config.provider ?? 'openai';
const model = config.model ?? PROVIDER_MODELS[provider] ?? 'gpt-4o';
const baseUrl = config.baseUrl ?? PROVIDER_URLS[provider];
const apiKey = config.apiKey
?? (PROVIDER_KEYS[provider] ?? []).map(k => process.env[k]).find(Boolean)
?? (provider === 'ollama' ? 'ollama' : undefined);
const clientOpts: Record<string, unknown> = {};
if (apiKey) clientOpts.apiKey = apiKey;
if (baseUrl) clientOpts.baseURL = baseUrl;
if (provider !== 'openai') {
clientOpts.organization = null;
clientOpts.project = null;
}
const client = new OpenAI(clientOpts as any);
const openAITools: ChatCompletionTool[] = config.tools.map(t => ({
type: 'function' as const,
function: {
name: t.name,
description: t.description,
parameters: t.parameters,
},
}));
const maxRounds = config.maxRounds ?? 5;
return {
async run(prompt, options = {}) {
const messages: ChatCompletionMessageParam[] = [];
if (options.system) messages.push({ role: 'system', content: options.system });
messages.push({ role: 'user', content: prompt });
const allToolCalls: ToolCall[] = [];
const allToolResults: ToolResult[] = [];
let rounds = 0;
let totalUsage = { promptTokens: 0, completionTokens: 0, totalTokens: 0 };
while (rounds < maxRounds) {
rounds++;
const response = await client.chat.completions.create({
model,
messages,
tools: openAITools,
temperature: config.temperature ?? 0.7,
max_tokens: config.maxTokens ?? 4096,
});
const choice = response.choices[0];
if (response.usage) {
totalUsage.promptTokens += response.usage.prompt_tokens;
totalUsage.completionTokens += response.usage.completion_tokens;
totalUsage.totalTokens += response.usage.total_tokens;
}
// No tool calls — done
if (!choice.message.tool_calls?.length) {
return {
content: choice.message.content ?? '',
toolCalls: allToolCalls,
toolResults: allToolResults,
rounds,
usage: totalUsage,
};
}
// Process tool calls
messages.push(choice.message as any);
for (const tc of choice.message.tool_calls) {
const parsed: ToolCall = {
id: tc.id,
name: tc.function.name,
arguments: JSON.parse(tc.function.arguments || '{}'),
};
allToolCalls.push(parsed);
if (config.execute) {
const result = await config.execute(parsed.name, parsed.arguments);
allToolResults.push({ toolCallId: tc.id, result });
messages.push({
role: 'tool',
tool_call_id: tc.id,
content: result,
});
} else {
// No executor — return with pending tool calls
return {
content: choice.message.content ?? '',
toolCalls: allToolCalls,
toolResults: allToolResults,
rounds,
usage: totalUsage,
};
}
}
}
// Max rounds reached
return {
content: '[max tool call rounds reached]',
toolCalls: allToolCalls,
toolResults: allToolResults,
rounds,
usage: totalUsage,
};
},
async step(messages) {
const response = await client.chat.completions.create({
model,
messages: messages as ChatCompletionMessageParam[],
tools: openAITools,
temperature: config.temperature ?? 0.7,
max_tokens: config.maxTokens ?? 4096,
});
const choice = response.choices[0];
const toolCalls: ToolCall[] = (choice.message.tool_calls ?? []).map(tc => ({
id: tc.id,
name: tc.function.name,
arguments: JSON.parse(tc.function.arguments || '{}'),
}));
return {
content: choice.message.content,
toolCalls,
};
},
get tools() {
return config.tools;
},
};
}
// ── Helpers ─────────────────────────────────────────────────────────
/** Create a ToolDefinition from a simple spec */
export function defineTool(
name: string,
description: string,
parameters: Record<string, { type: string; description: string; required?: boolean }>,
): ToolDefinition {
const required = Object.entries(parameters)
.filter(([, v]) => v.required !== false)
.map(([k]) => k);
const properties: Record<string, any> = {};
for (const [k, v] of Object.entries(parameters)) {
properties[k] = { type: v.type, description: v.description };
}
return {
name,
description,
parameters: {
type: 'object',
properties,
required,
},
};
}
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