feat(tcs): establish five-domain mother brain runtime

server-tools/tcs-mother-brain/model-client.mjs

@@ -0,0 +1,77 @@
+const DEFAULT_TIMEOUT_MS = 45_000;
+
+function completionEndpoint(apiUrl) {
+  const value = String(apiUrl || "").replace(/\/+$/, "");
+  return /\/chat\/completions$/i.test(value) ? value : `${value}/chat/completions`;
+}
+
+function extractJson(text) {
+  const value = String(text || "").trim();
+  if (!value) throw new Error("model_response_empty");
+  try { return JSON.parse(value); } catch {}
+  const fenced = value.match(/```(?:json)?\s*([\s\S]*?)```/i);
+  if (fenced) return JSON.parse(fenced[1]);
+  const first = value.indexOf("{");
+  const last = value.lastIndexOf("}");
+  if (first >= 0 && last > first) return JSON.parse(value.slice(first, last + 1));
+  throw new Error("model_response_not_json");
+}
+
+export class DeepSeekJsonClient {
+  constructor({
+    apiKey = process.env.DEEPSEEK_API_KEY,
+    apiUrl = process.env.DEEPSEEK_API_URL || "https://api.deepseek.com/v1",
+    model = process.env.DEEPSEEK_MODEL || "deepseek-chat",
+    fetchImpl = globalThis.fetch,
+    timeoutMs = DEFAULT_TIMEOUT_MS,
+  } = {}) {
+    if (!apiKey) throw new Error("deepseek_api_key_missing");
+    if (!fetchImpl) throw new Error("fetch_unavailable");
+    this.apiKey = apiKey;
+    this.apiUrl = apiUrl;
+    this.model = model;
+    this.fetchImpl = fetchImpl;
+    this.timeoutMs = timeoutMs;
+  }
+
+  async interpret(input) {
+    const controller = new AbortController();
+    const timer = setTimeout(() => controller.abort(), this.timeoutMs);
+    try {
+      const response = await this.fetchImpl(completionEndpoint(this.apiUrl), {
+        method: "POST",
+        headers: {
+          authorization: `Bearer ${this.apiKey}`,
+          "content-type": "application/json",
+        },
+        body: JSON.stringify({
+          model: this.model,
+          stream: false,
+          temperature: 0.2,
+          response_format: { type: "json_object" },
+          messages: [
+            {
+              role: "system",
+              content: "你是TCS母体大脑的有界语言理解器官。只输出一个JSON对象，不输出隐藏思维过程。不得把候选理解写成事实、不得发明现实权限或冰朔的新意志。",
+            },
+            {
+              role: "user",
+              content: JSON.stringify({
+                instruction: "理解语言意图与因果关系。精确输出schema,event_id,event_sha256,summary,intent,causal_links,questions,novelty,correction_weight,evidence_weight,next_cognitive_action。causal_links与questions是字符串数组；三个weight是0到100整数；schema必须是guanghu.tcs-mother-interpretation/v1；id和sha必须原样复制。next_cognitive_action只能是COMPARE_WITH_MEMORY、REQUEST_EVIDENCE、REVIEW_CORRECTION、LINK_CROSS_DOMAIN、HOLD_CANDIDATE之一。",
+                runtime_input: input,
+              }),
+            },
+          ],
+        }),
+        signal: controller.signal,
+      });
+      if (!response.ok) throw new Error(`model_http_${response.status}`);
+      const payload = await response.json();
+      return extractJson(payload?.choices?.[0]?.message?.content);
+    } finally {
+      clearTimeout(timer);
+    }
+  }
+}
+
+export { completionEndpoint, extractJson };