feat(平台): 补齐服务端持久化和AI拆解契约

apps/server/src/modules/ai/providers/openai.provider.ts

@@ -0,0 +1,79 @@
+import OpenAI from 'openai';
+import type { AiProvider, PingRequest, PingResponse, ToolCallRequest, ToolCallResponse } from './provider.interface';
+
+/**
+ * OpenAI 格式提供商（兼容 OpenAI Chat Completions 风格的中转站）
+ */
+export class OpenAIProvider implements AiProvider {
+  readonly format = 'openai' as const;
+  private client: OpenAI;
+
+  constructor(apiKey: string, baseURL: string) {
+    this.client = new OpenAI({
+      apiKey,
+      baseURL,
+    });
+  }
+
+  async callTool(req: ToolCallRequest): Promise<ToolCallResponse> {
+    const response = await this.client.chat.completions.create({
+      model: req.model,
+      max_tokens: req.maxTokens,
+      messages: [
+        { role: 'system', content: req.systemPrompt },
+        { role: 'user', content: req.userPrompt },
+      ],
+      tools: [
+        {
+          type: 'function',
+          function: {
+            name: req.tool.name,
+            description: req.tool.description,
+            parameters: req.tool.inputSchema,
+          },
+        },
+      ],
+      tool_choice: req.forceTool
+        ? { type: 'function', function: { name: req.tool.name } }
+        : 'auto',
+    });
+
+    const choice = response.choices[0];
+    if (!choice?.message?.tool_calls?.length) {
+      throw new Error('OpenAI 未通过 tool_calls 返回结果');
+    }
+
+    const tc = choice.message.tool_calls[0];
+    if (tc.type !== 'function') {
+      throw new Error('OpenAI 返回的 tool_call 类型非 function');
+    }
+
+    let parsed: Record<string, any>;
+    try {
+      parsed = JSON.parse(tc.function.arguments || '{}');
+    } catch (e) {
+      throw new Error(`OpenAI tool_call arguments 不是合法 JSON: ${(e as Error).message}`);
+    }
+
+    return {
+      toolName: tc.function.name,
+      toolInput: parsed,
+      inputTokens: response.usage?.prompt_tokens ?? 0,
+      outputTokens: response.usage?.completion_tokens ?? 0,
+      rawModel: response.model,
+    };
+  }
+
+  async ping(req: PingRequest): Promise<PingResponse> {
+    const resp = await this.client.chat.completions.create({
+      model: req.model,
+      max_tokens: 16,
+      messages: [{ role: 'user', content: 'ping' }],
+    });
+    return {
+      ok: true,
+      inputTokens: resp.usage?.prompt_tokens ?? 0,
+      outputTokens: resp.usage?.completion_tokens ?? 0,
+    };
+  }
+}