{"id":16,"date":"2026-06-04T16:51:59","date_gmt":"2026-06-04T08:51:59","guid":{"rendered":"https:\/\/ai.wuaishare.cn\/lab\/2026\/06\/04\/langchain-custom-agent-harness\/"},"modified":"2026-06-05T03:17:03","modified_gmt":"2026-06-04T19:17:03","slug":"langchain-custom-agent-harness","status":"publish","type":"post","link":"https:\/\/ai.wuaishare.cn\/lab\/16","title":{"rendered":"\u7528 LangChain \u6784\u5efa\u81ea\u5b9a\u4e49 Agent Harness\uff1a\u628a\u6a21\u578b\u63a5\u5165\u771f\u5b9e\u4efb\u52a1\u73af\u5883"},"content":{"rendered":"

Harness \u4e0d\u662f\u5916\u58f3\uff0c\u800c\u662f Agent \u7684\u5de5\u4f5c\u73af\u5883<\/h2>\n

LangChain \u8fd9\u7bc7\u6587\u7ae0\u628a\u4e00\u53e5\u8bdd\u8bb2\u5f97\u5f88\u6e05\u695a\uff0cAgent \u53ef\u4ee5\u7406\u89e3\u6210 model \u52a0 harness\u3002\u6a21\u578b\u8d1f\u8d23\u63a8\u7406\uff0cHarness \u8d1f\u8d23\u628a\u6a21\u578b\u63a5\u5230\u771f\u5b9e\u4e16\u754c\uff0c\u63d0\u4f9b\u4e0a\u4e0b\u6587\u3001\u5de5\u5177\u3001\u73af\u5883\u3001\u7b56\u7565\u548c\u72b6\u6001\u3002\u5f88\u591a Agent \u4e0d\u597d\u7528\uff0c\u4e0d\u662f\u6a21\u578b\u4e0d\u884c\uff0c\u800c\u662f Harness \u6ca1\u6709\u7ed9\u5230\u6b63\u786e\u4e0a\u4e0b\u6587\uff0c\u6216\u8005\u628a\u5de5\u5177\u3001\u4e1a\u52a1\u89c4\u5219\u548c\u5b89\u5168\u7b56\u7565\u5168\u90e8\u585e\u8fdb prompt \u91cc\u3002<\/p>\n

\u5148\u4ece\u6700\u5c0f Harness \u5f00\u59cb<\/h2>\n

LangChain \u7684 `create_agent` \u662f\u4e00\u4e2a\u5f88\u5c0f\u7684\u8d77\u70b9\uff0c\u7ed9\u5b83\u6a21\u578b\u3001\u5de5\u5177\u548c\u7cfb\u7edf\u63d0\u793a\uff0c\u5c31\u80fd\u8dd1\u4e00\u4e2a\u57fa\u7840 agent loop\u3002\u5b9e\u6218\u91cc\u4e0d\u8981\u4e00\u4e0a\u6765\u5806\u590d\u6742\u4e2d\u95f4\u4ef6\u3002\u5148\u9009\u4e00\u4e2a\u4efb\u52a1\uff0c\u628a\u6a21\u578b\u9700\u8981\u77e5\u9053\u7684\u4e0a\u4e0b\u6587\u3001\u5141\u8bb8\u8c03\u7528\u7684\u5de5\u5177\u3001\u6700\u7ec8\u8f93\u51fa\u683c\u5f0f\u548c\u5931\u8d25\u8fb9\u754c\u5199\u6e05\u695a\u3002\u8fd9\u4e2a\u6700\u5c0f\u7248\u672c\u80fd\u7a33\u5b9a\u8dd1\uff0c\u518d\u52a0 memory\u3001sandbox\u3001approval\u3001eval \u548c\u52a8\u6001\u6a21\u578b\u9009\u62e9\u3002<\/p>\n

Middleware \u662f\u5b9a\u5236\u91cd\u70b9<\/h2>\n

\u6587\u7ae0\u91cc\u6700\u503c\u5f97\u5e26\u8d70\u7684\u662f middleware \u601d\u8def\u3002\u5b83\u53ef\u4ee5\u5728\u6a21\u578b\u8c03\u7528\u524d\u540e\u3001\u5de5\u5177\u8c03\u7528\u524d\u540e\u3001\u542f\u52a8\u548c\u7ed3\u675f\u65f6\u4ecb\u5165\u3002\u786e\u5b9a\u6027\u4e1a\u52a1\u903b\u8f91\u3001\u7b56\u7565\u6267\u884c\u3001\u5de5\u5177\u6ce8\u518c\u3001\u4e0a\u4e0b\u6587\u538b\u7f29\u3001\u6a21\u578b\u5207\u6362\u3001\u65e5\u5fd7\u91c7\u96c6\u548c\u8d44\u6e90\u6e05\u7406\uff0c\u90fd\u5e94\u8be5\u653e\u5728 middleware\uff0c\u800c\u4e0d\u662f\u5199\u8fdb\u4e00\u6bb5\u8d8a\u6765\u8d8a\u957f\u7684\u7cfb\u7edf\u63d0\u793a\u3002\u8fd9\u6837 Harness \u624d\u53ef\u6d4b\u8bd5\u3001\u53ef\u66ff\u6362\u3001\u53ef\u89c2\u6d4b\u3002<\/p>\n

\u9002\u5408\u653e\u8fdb Middleware \u7684\u4e1c\u897f<\/h2>\n
    \n
  1. \u4efb\u52a1\u590d\u6742\u5ea6\u5224\u65ad\uff0c\u7b80\u5355\u4efb\u52a1\u7528\u4fbf\u5b9c\u6a21\u578b\uff0c\u590d\u6742\u4efb\u52a1\u5207\u5f3a\u6a21\u578b\u3002<\/li>\n
  2. \u5de5\u5177\u767d\u540d\u5355\uff0c\u6839\u636e\u7528\u6237\u6743\u9650\u548c\u4efb\u52a1\u7c7b\u578b\u52a8\u6001\u66b4\u9732\u5de5\u5177\u3002<\/li>\n
  3. \u654f\u611f\u64cd\u4f5c\u62e6\u622a\uff0c\u4f8b\u5982\u5220\u9664\u6587\u4ef6\u3001\u53d1\u9001\u90ae\u4ef6\u3001\u90e8\u7f72\u3001\u5199\u6570\u636e\u5e93\u3002<\/li>\n
  4. \u4e0a\u4e0b\u6587\u6574\u7406\uff0c\u628a\u957f\u5386\u53f2\u538b\u7f29\u6210\u5f53\u524d\u4efb\u52a1\u9700\u8981\u7684\u4e8b\u5b9e\u3002<\/li>\n
  5. \u8fd0\u884c\u7ed3\u675f\u6e05\u7406\uff0c\u5173\u95ed\u8fde\u63a5\u3001\u5220\u9664\u4e34\u65f6\u6587\u4ef6\u3001\u5f52\u6863\u65e5\u5fd7\u3002<\/li>\n<\/ol>\n

    \u4e0d\u8981\u628a Harness \u505a\u6210\u9ed1\u7bb1<\/h2>\n

    Harness \u8d8a\u5f3a\uff0c\u8d8a\u9700\u8981\u900f\u660e\u3002\u6bcf\u6b21\u6a21\u578b\u8c03\u7528\u62ff\u5230\u4e86\u4ec0\u4e48\u4e0a\u4e0b\u6587\uff0c\u54ea\u4e9b\u5de5\u5177\u88ab\u6ce8\u518c\uff0c\u54ea\u4e2a middleware \u62e6\u622a\u4e86\u52a8\u4f5c\uff0c\u6700\u7ec8\u4e3a\u4ec0\u4e48\u505c\u6b62\uff0c\u90fd\u8981\u80fd\u770b\u3002\u5426\u5219\u56e2\u961f\u4f1a\u628a\u6240\u6709\u95ee\u9898\u90fd\u5f52\u548e\u4e8e\u6a21\u578b\uff0c\u4f46\u771f\u6b63\u7684 bug \u53ef\u80fd\u5728\u5de5\u5177\u521d\u59cb\u5316\u3001\u4e0a\u4e0b\u6587\u6ce8\u5165\u6216\u6743\u9650\u5224\u65ad\u91cc\u3002<\/p>\n

    \u4e00\u6761\u5de5\u7a0b\u5316\u8def\u7ebf<\/h2>\n

    \u53ef\u4ee5\u5148\u7528 `create_agent` \u505a\u6700\u5c0f\u53ef\u7528\u7248\u672c\uff0c\u518d\u628a\u91cd\u590d\u51fa\u73b0\u7684 prompt \u89c4\u5219\u4e0b\u6c89\u5230 middleware\uff0c\u628a\u9ad8\u98ce\u9669\u5de5\u5177\u63a5\u5165\u5ba1\u6279\uff0c\u628a\u957f\u4efb\u52a1\u63a5\u5165 trace\uff0c\u628a\u8f93\u51fa\u63a5\u5165 rubric \u6216\u6d4b\u8bd5\u3002\u6bcf\u52a0\u4e00\u5c42\uff0c\u90fd\u8981\u6709\u5bf9\u5e94\u7684\u65e5\u5fd7\u548c\u5355\u5143\u6d4b\u8bd5\u3002Agent Harness \u7684\u6210\u719f\u5ea6\uff0c\u4e0d\u770b\u5b83\u652f\u6301\u591a\u5c11\u5de5\u5177\uff0c\u800c\u770b\u5931\u8d25\u65f6\u80fd\u4e0d\u80fd\u8bf4\u6e05\u53d1\u751f\u4e86\u4ec0\u4e48\u3002<\/p>\n

    \u5efa\u8bae\u4ea7\u51fa<\/h2>\n

    \u8bfb\u5b8c\u8fd9\u7bc7\u6587\u7ae0\u540e\uff0c\u5efa\u8bae\u753b\u4e00\u5f20\u81ea\u5df1\u7684 Agent Harness \u5206\u5c42\u56fe\uff0c\u81f3\u5c11\u5305\u542b\u6a21\u578b\u5c42\u3001\u4e0a\u4e0b\u6587\u5c42\u3001\u5de5\u5177\u5c42\u3001middleware \u5c42\u3001\u5ba1\u6279\u5c42\u3001\u89c2\u6d4b\u5c42\u548c\u8f93\u51fa\u9a8c\u8bc1\u5c42\u3002\u4ee5\u540e\u65b0\u589e Agent\uff0c\u4e0d\u8981\u4ece prompt \u5f00\u59cb\uff0c\u800c\u662f\u5148\u51b3\u5b9a\u5b83\u9700\u8981\u54ea\u4e00\u5957 Harness\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u57fa\u4e8e LangChain \u5b98\u65b9\u6587\u7ae0\uff0c\u8bb2\u6e05 Agent Harness \u5982\u4f55\u7ec4\u7ec7\u6a21\u578b\u8c03\u7528\u3001\u5de5\u5177\u8c03\u7528\u3001\u4e2d\u95f4\u4ef6\u548c\u4efb\u52a1\u73af\u5883\u3002<\/p>\n","protected":false},"author":0,"featured_media":17,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ai_share_series_order":0,"ai_share_series_key":"","ai_share_source_repo":"","ai_share_source_path":"","ai_share_source_sha":"","ai_share_source_commit":"","ai_share_source_last_checked_at":"","ai_share_source_sync_status":"","ai_share_linked_hub_post_slug":"","ai_share_source_url":"https:\/\/www.langchain.com\/blog\/how-to-build-a-custom-agent-harness","ai_share_source_title":"How to Build a Custom Agent Harness","ai_share_status":"\u5f85\u91c7\u96c6","ai_share_source_id":8,"ai_share_source_canonical_url":"https:\/\/www.langchain.com\/blog\/how-to-build-a-custom-agent-harness","ai_share_source_verified_at":"2026-06-04","ai_share_source_published_at":"2026-06-03","ai_share_origin_platform":"LangChain Blog","ai_share_origin_author":"LangChain","ai_share_origin_author_url":"","ai_share_origin_url":"https:\/\/www.langchain.com\/blog\/how-to-build-a-custom-agent-harness","ai_share_origin_title":"How to Build a Custom Agent Harness","ai_share_origin_published_at":"2026-06-03","ai_share_origin_captured_at":"2026-06-04","ai_share_origin_material_type":"official_blog","ai_share_origin_transform_note":"","ai_share_origin_disclaimer":"","ai_share_relation_edges_json":"","ai_share_verified_distributions_json":"","footnotes":""},"categories":[39],"tags":[30,40,42,41],"ai_series":[],"ai_topic":[],"ai_creator":[],"ai_source_platform":[],"class_list":["post-16","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-agent","tag-agent","tag-langchain","tag-langgraph","tag-middleware"],"lang":"zh-cn","translations":{"zh-cn":16},"pll_sync_post":{},"_links":{"self":[{"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/posts\/16","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/comments?post=16"}],"version-history":[{"count":3,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/posts\/16\/revisions"}],"predecessor-version":[{"id":101,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/posts\/16\/revisions\/101"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/media\/17"}],"wp:attachment":[{"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/media?parent=16"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/categories?post=16"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/tags?post=16"},{"taxonomy":"ai_series","embeddable":true,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/ai_series?post=16"},{"taxonomy":"ai_topic","embeddable":true,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/ai_topic?post=16"},{"taxonomy":"ai_creator","embeddable":true,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/ai_creator?post=16"},{"taxonomy":"ai_source_platform","embeddable":true,"href":"https:\/\/ai.wuaishare.cn\/lab\/wp-json\/wp\/v2\/ai_source_platform?post=16"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}