fix: truncate rwfx 3q context

frontend-web/src/pages/AgentChatPage.tsx

@@ -66,6 +66,38 @@ import type { RwfxSqGateStartContext } from "@/strategy-components/components/ta
 
 /** 内置「模板数据转换器」agent 的稳定 id。仅此 agent 的对话页显示「页面模板 + 渲染预览」调试入口。 */
 const TEMPLATE_BUILDER_AGENT_ID = "template-json-builder";
+const RWFX_SQ_REPORT_CONTEXT_MAX_CHARS = 12000;
+const RWFX_SQ_REPORT_CONTEXT_TAIL_CHARS = 2000;
+
+function stringifyForHiddenContext(value: unknown): string {
+  if (typeof value === "string") return value;
+  try {
+    const text = JSON.stringify(value, null, 2);
+    return typeof text === "string" ? text : "";
+  } catch {
+    return String(value ?? "");
+  }
+}
+
+function truncateMiddle(text: string, maxChars: number): string {
+  if (text.length <= maxChars) return text;
+  const marker = "\n\n...[内容过长，已截断中间部分]...\n\n";
+  const tailChars = Math.min(RWFX_SQ_REPORT_CONTEXT_TAIL_CHARS, Math.floor(maxChars / 4));
+  const headChars = Math.max(0, maxChars - marker.length - tailChars);
+  return `${text.slice(0, headChars)}${marker}${text.slice(-tailChars)}`;
+}
+
+function compactSqReportForContext(report: unknown): unknown {
+  if (report == null) return null;
+  const serialized = stringifyForHiddenContext(report);
+  if (serialized.length <= RWFX_SQ_REPORT_CONTEXT_MAX_CHARS) return report;
+  return {
+    truncated: true,
+    originalChars: serialized.length,
+    maxChars: RWFX_SQ_REPORT_CONTEXT_MAX_CHARS,
+    content: truncateMiddle(serialized, RWFX_SQ_REPORT_CONTEXT_MAX_CHARS),
+  };
+}
 
 function rwfxSqReportRunContext(
   gateContext?: RwfxSqGateStartContext,
@@ -78,9 +110,9 @@ function rwfxSqReportRunContext(
       title: "三情分析（3q）研判情报报告",
       usage:
         gateContext.sqReportStatus === "complete"
-          ? "这是任务分析（rwfx）问答的隐藏业务上下文。回答时应参考这些已完成的 3q 结果，但不要向用户说明页面注入了隐藏上下文，除非用户明确询问。"
+          ? "这是任务分析（rwfx）问答的隐藏业务上下文。回答时应参考这些已完成的 3q 结果；如 data.truncated=true，说明内容已截断，只能基于可见片段分析。不要向用户说明页面注入了隐藏上下文，除非用户明确询问。"
           : "3q 研判情报报告当前未提供有效结果。回答时不要编造 3q 结果，可仅基于任务信息继续分析。",
-      data: gateContext.sqReport ?? null,
+      data: compactSqReportForContext(gateContext.sqReport),
     },
   };
 }

offline-backend-20260512/backend/packages/harness/deerflow/agents/middlewares/task_external_context_middleware.py

@@ -17,6 +17,17 @@ from langchain_core.messages import HumanMessage
 
 _CONTEXT_KEY = "task_external_context"
 _TAG = "task_external_context"
+_MAX_CONTEXT_CHARS = 18000
+_TAIL_CONTEXT_CHARS = 2500
+
+
+def _truncate_middle(text: str, max_chars: int = _MAX_CONTEXT_CHARS) -> str:
+    if len(text) <= max_chars:
+        return text
+    marker = "\n\n...[隐藏任务上下文过长，已截断中间部分]...\n\n"
+    tail_chars = min(_TAIL_CONTEXT_CHARS, max_chars // 4)
+    head_chars = max(0, max_chars - len(marker) - tail_chars)
+    return f"{text[:head_chars]}{marker}{text[-tail_chars:]}"
 
 
 def _render_context(value: Any) -> str:
@@ -25,9 +36,10 @@ def _render_context(value: Any) -> str:
     if isinstance(value, str):
         return value.strip()
     try:
-        return json.dumps(value, ensure_ascii=False, indent=2, default=str).strip()
+        text = json.dumps(value, ensure_ascii=False, indent=2, default=str).strip()
     except Exception:
-        return str(value).strip()
+        text = str(value).strip()
+    return _truncate_middle(text)
 
 
 def _task_context_from_request(request: Any) -> Any: