LangSmith Engine: The agent for agent engineering
Once traces are flowing, Engine improves your agents autonomously.
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Once traces are flowing, Engine improves your agents autonomously.͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ LangSmith (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrJx5n4LbW50kH_H6lZ3pxW7DH0JY7R8HwFVH9thb7Lpy3bW8Khlbn4C0gn9V_SBPv8n_CCqW3gftfd3fzFQFW5VNWn270QPRCW7K6Qtc1JswvYN7FykGYkPc_SW92_BZB2mSlLNW2pkgVW3KLybMW2m1Jyv9m2J1nW65JmfP3tTCNRW6-bXqW3mFlffW39nwbK6680S2W4R4NyN2v7Zg_N3kd3vKYn7-0W1M8MNG5msw23W9kmfQC22HRJCN2X_kpBCrjQdW2XKRnq56fp2gW1GLhnT4Jv1b0W7rnkm62HR0yKW6Fpdq91yHLlLVjSvgv3ZzKqWW1qJHvY5LDktNV4B3661XX8J6N6FJ9k_ScNTDW8qTWGW47ZDz5W2tzDw18Mnb_yW6_r9sG2gjc8PN6LLDHPnB-17W45Wr4p3jXXmJf859ff604 ) The agent for agent engineering Build Test Deploy Monitor When agents are running in production, manual trace review only gets you so far. LangSmith Engine helps. Open LangSmith Engine (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrJx5n4LbW50kH_H6lZ3k_N8-lnljlPyvNW1Z4pvB59ccbgVFJ6W-6RxSc_VTwd-24vXjtgW3t5KQy3qFrXyW1Nr3tR3DNQWtW5sy1tZ5YGpBsW7s_jhX49nV0cV9t1ht4p59CwVvqt5r1HhrW2W2-RCR-6M4ZmRMwvBvC_H7p2W8gpDs14xmxFNW25vxVn2Rvd44Mnz_LTBKkBTW4QLVJx6KK3rGVX1R6-880-W0N1XsstRWW9pFN5gdNcT4DcfqW8RyDqr6c6ftfW62hGY22l7ng2W843kb02KDL_XW3G0WL68wsp4tW1ScQ4k2xQr3-MBbF_jnx1nsW624DwP7h259nW2hmMm81BkcnnW85YCr38bqFKYW6-WRtV66fycgV-0-NW1BRmwVW3zWVDy1VWgZ1W4BZ5Ts2cCh1Jf46M0zd04 ) Available on Plus, Startup, and Enterprise plans. Read the docs (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrJR5n4LbW5BWr2F6lZ3nrW4-0pJv8QlJtjW5T96pF8xWKc7W5hLmsm7RKK2MW3sflWl2Yncp0W6RVVTy4n0hX8VwJGVY5ZlKmFW3zLCMJ6RhG_9W74wC559cyvYFW7F12f4144tV5W9fV-Pb4JRftXW76Rfdn29jzzhW5Wd9Ff3wdMsXW99gx4F5klrd6W11g9Xx6jrhLqW7sRKXk87XJSBVG71GL6L9XL4W3L7_nS1s7gJBW2gyHQm21W8g8W7xcCwT1sDLBWN6RHf0JZ5gtZW6Yd2mb3Mdt-9W8jvgqc1lm6vdW4-SXBk7dc2lgW3G56DJ438JDcV8hk7b5XjfMDW1wxsT63GV7X0W7wV0-J6LSDWKVB9lvR4-VFnFW8ZkJtr8QKgp6W4g6hqX3Tqw0MW74v8KV4b8tBlVkk4C684t25PVfwQVw1lMwnXW6StC-S2q20HXf6MPXsx04 ) or view pricing (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrJx5n4LbW50kH_H6lZ3nbW9dNY7v6RPWg5W8J4_FD2XsqC7W4BjS8w2K53t9W29Jn8B4fcyTGW54P7QF2Cl93sW1MBjDP5-SPsDW91fsV_5lCT8CW2gt46n26MZhpW8h8_Ql2G-nMxV2PSK38ZGw9wW8Pr07h1F-rh8W5QQ6nc7hmZdBW4h1fKy87-NxbN1gpXznyBnrsW41NNd341zMM2W6xF4p133kGWYW3hwVr84Wvf3yW6wRHLl4HY1R6W3SSWlH1yK1ZxVj9n9G7NJPwdW9g7pl35HlxWhW8x0S492VY3k1W2PQTwh3__31_W3HzlVx7H2HcXW6r8Lnf7S1TQbW35kqtG3ts7tmW5vvDgh6CzVcVW7SYfyL7_-r-CVM10KF35Vw6HW1CZ6v51j6MFJW3rQXPM266ppgW2czvcZ3487rrf6F2xzR04 ) . LangSmith Engine issues list: detected issues such as an agent stuck in a retriever tool-call loop, each with severity, a category and its trace count. Then the issue with its linked traces, then the proposed fix to the system prompt. (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrJx5n4LbW50kH_H6lZ3k_N8-lnljlPyvNW1Z4pvB59ccbgVFJ6W-6RxSc_VTwd-24vXjtgW3t5KQy3qFrXyW1Nr3tR3DNQWtW5sy1tZ5YGpBsW7s_jhX49nV0cV9t1ht4p59CwVvqt5r1HhrW2W2-RCR-6M4ZmRMwvBvC_H7p2W8gpDs14xmxFNW25vxVn2Rvd44Mnz_LTBKkBTW4QLVJx6KK3rGVX1R6-880-W0N1XsstRWW9pFN5gdNcT4DcfqW8RyDqr6c6ftfW62hGY22l7ng2W843kb02KDL_XW3G0WL68wsp4tW1ScQ4k2xQr3-MBbF_jnx1nsW624DwP7h259nW2hmMm81BkcnnW85YCr38bqFKYW6-WRtV66fycgV-0-NW1BRmwVW3zWVDy1VWgZ1W4BZ5Ts2cCh1Jf46M0zd04 ) Engine drives fixes across the entire agent development lifecycle: 1 Issue detection. Monitors production traces for evaluator failures, tool errors, latency spikes, and negative user feedback. Related failures are grouped into named issues with severity, timeline, and trace evidence. 2 Root cause diagnosis. When your repo is connected, Engine reads the relevant code, identifies the likely issue, and opens a GitHub PR with the proposed fix for your review. 3 Eval coverage. Proposes an online evaluator scoped to the failure pattern and adds failing traces to your offline eval dataset, so the same issue can't silently recur. Watch the Engine video (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrJx5n4LbW50kH_H6lZ3psW3Xvc6069mCdsW6CJWzm4Ntc4wW8TQF-71SctVBW3M4vgz6skvJQW76s6lr4TSvZ2W7n5HSz4l0s8tW1ClB2D8RyMh-VXQB9T4PZfSMW3yHYc15W0cNdW5Pzpc22qLRxPW4t4J5G1xyNNXW66xLb01dgYDhW6bFCs85lz8WSDV4JC-CLB7W55cvKH3KjQrRW78R7Hy2nKcWtW2YL2DW2yRjMrVh8TZ48r5yfjV9NN3Z4yN7PtW6b8Bfw7Q1KB3W7bmh_95LDfH9W89ZHdf56kV2QVsJ5hF1ZpT8MN212DqD2LlsxW1KpBrb1tycS9W30s0pL6VJQNfW8xJMf81QxGWSW5RKwvB1kQ7LNW3mWgD_1gDFdDW6f83wW4xVZh6W6fK28f5HhLQmW12hb7f90Q2k2f6JT5mP04 ) See how Engine clusters traces into issues. Need help? Support portal (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrLC3pyd0W95jsWP6lZ3k_W3WtkJQ23B-M7W817_nf79Nqt7W3TMYXb4W4dkcN3-2JrfGXt3SW1TS5HP6GtnQ5W7L7GkV3FC5KFVxTwxm6lt21vW1KpDWX6N1GrtW15TqW_6_F_kyW2jb90w7RRHzZN4L0P4p_lNgKW1BZLFC5ZZk01W8GNfyX3pzRTBVyxzGw37gn0cW73rT_f31Z661W4F5yBG7G6RfJW9b1PQx8Mw0PjW8lJfDN39Ybp4W7GX0ty88tmsgW4ywTn128B5F-W1dvY8_4SKMPFW64ZVX-2r-DTLW5D_cP31m3Wm_W8hk9Yy3L59btW5hdt2C6b5pc8N6n8y9DR8rPzV9hfPZ13V21_VPlvmp2xm0G7W23fYQ07h8H3SW5pDsmg2dF0DGdK9SsH04 ) Find answers, submit a ticket, or chat with our AI assistant. Engine announcement (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrJR5n4LbW5BWr2F6lZ3lPW7g-f3b7DpSs2W2dhFDj5xHcrlW3j4MJQ8qXVc-W3Fqq7H9knZhhN62VkH8BFjTGW9k52861b2YBFW32Q2vx8z8ckyW2FQ8mV3CV5n6W2s2H7J4Y6r12W14mVzv21Kwq1W36GxBL34B1VpN3nScDklthS0W7L1BR55rWFN5W5K16XW67gBC6W94FxRb7NghX4W8J__FN38DxT-W51NBRx89r5RgVTxkjH1yRn_xW1x8pcv7hmhKKW5Ds41x7V41V0W3Y_MHD6kXgtvW2_zPwt8Krf5jW2k9G682l-flRF1tZF0KW6k_W6mz8vl50DZZZW13YZZV1v9smwW3N1bS17NPcqbW191CSj2mY4SZW5VbSvP374NCnW7vRqJP9c7zXcW3HDLx91N6_ZxW6VGJXw7ZpvD6W5wgBF55NS-krW8tvmZz3N7w2CdJ4pVY04 ) Read the LangSmith Engine announcement blog. LangChain Academy (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrLC3pyd0W95jsWP6lZ3nDVN1j7b5C_QvzW5LF07v24DFsDN4-8M0z946VYW3nYmFC77Sk7ZW4q-Rlg4Mzsj-W6wGyFw8FYxF8W6SlNJn4LRdHjW4hWzMz8SGw9lW6LVQhC7kTqwJW1ZrK6L2r8ZFhW3cf0xG2-426lW2WcTZZ1nc7z9W8NSjC01dD_SQW1p3jQD6d7VTjW6k6WcH1BZqG7W4Tq6cM9lbsVnW1Wgz487cdWs4W2J8_Lc31mjdYN70P_7ZM0MbzW5s-vNq53QqW4W6J6jGn6jzKXnN2Z-mM3pxtgLW3jW3_58-YrS5W8_JHPD364FPvW3HJ4WX295D3-W5m_y_F3w_z5QW3PPrTD3VxqzFW5b6WTs7sq6C8W6kQmDr7K11t-W4Cq1XF8WMf0Zf3yrPGz04 ) Self-paced courses on agent observability, evals, deployment, and more. Best, The LangChain Team LangChain (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrLC3pyd0W95jsWP6lZ3q3W7_Bgdp6RPYx9VydgLP2gS8_vW7vV-Rp4nkx0RW6VRMF86fDXH2W20kC4z7fVnGVW128trF1V0CF6W5zy1Zz54jgw4W2h85nm2h2_v9N4LXX6DDScSlW41d_QJ8-xk0GW4KwznB1CcTt4VbYd404Y95G_W39-k7K9gFDfdW6PYldh3WcS_yW3bBqb_8-92S6W8ZBB7c3-4M8bW5tC47R3r0nTpW84GYvL1HMlqfW19fPkZ265bpxW8rYp6V9c-c05W58_Qr23fLXM2W6DgGM_4j3KysW7R44p955G-mtVx9n7q6LhPRQMJ32-TMmYB3VmbYgz6l7ZKbW2QXr1C2cdzsNW2vpPyk2SfJlKN3llmcVnfNzfW1X42Kt6Yk-NDf6TT8jj04 ) Own your intelligence. ©2026 LangChain 2261 Market Street San Francisco, California 94114 LinkedIn (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrJx5n4LbW50kH_H6lZ3llW7lgBLk9l4r5hW6l6t3Q1JZMwMVNw9hM6DfXKDW1zl1wH80zbdkW6z9k4t887jSgW8nXS0Z10Fqy5W4QWkld62y_5PW567tJj6Jv5FfW8c8wtZ6ZMf2qW3bTlPb78vHsDW6PKq1d5gDFT8W9l6gd13K7DyFVWVRFp432ZDmW50Gyzg3QP1lWW8f-GXh5NWc8SN8CxCh1sC9CDW88c8yR7zQ_YbVncl7z4JfLWXW3J-Pbq8xmQpHW67W_rF2KQ6csW8GLsRm8bqKGwW7ZZCkK8Pgc9XVW6FbC2QkZGdW7Qf0cp67yWJsW5MYlTD1mg7nJN4jS-QmTzJhYVXJy1n4_rN-tW8ncmds2-vCkSW5XqC4P54b9v8W52DY6J97g_93W5HP_Jp3b5-psW68H_b-7v5vqff4ysz3q04 ) YouTube (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrJx5n4LbW50kH_H6lZ3pBW5pJ61V7_CZQRW5drpFm2ljWs0N4zw9nLLKkMsW7bY4zf1_t4YzN5nbTgrRF16bVt1qXJ11gtZPW3_M3Jy9gj--YM8pnJ39PFChW6tDmbm6KwRPWW4Bwl4L4GqsYPW5KvK7c21W4BJN5DxsZtWd1RBW2yKNkj8cSZ5SW6DS_h37C3VQnV4WG3y1qjq2ZW52hpXW4C_q5yW5DTPvd31Y_c3N3XGYGJ1Wfl6W5LD4f08sC3TsW4znHfk9fJmHtM9pGsnDkjdZW78q4vV3lFFf6VpLR-38bj6JxW6xZT4B7PZ4SYW7C21mr2jNzF7W9jL2h_7TT_yRW7rVkp22bC78CN5z6vt8B9GBtW1hMSVr3VPtBcW8l2Q8Q63XXBwN48WTYjqXSljW8g0fbx2ZVjpQf7wvKzn04 ) X (https://dxxRf404.na2.hubspotlinks.com/Ctc/JB+113/dxxRf404/VVCMk63Vj1yXW3RgzZm1mbDvHW2NZxg55WHzSQN4lQrLC3pyd0W95jsWP6lZ3p0W5nTtCB23qCntVmmQlB7Nl3dvW3t3sQv1ZH3ryW6NgtvF5zr_blW4v1VMh4TPg7PW1rKVzz2dFYXgW8VWBp47RfcgNW3g6ZlP5kV6bXW5d3vVh5PhkTDW7TKwYQ3Qgv9GW4YdG_Z7kl1PTW1TjxSy8SCm21W7VH8K56rms0MW4WNPXt3tZPdbW1k0T0M6KyljRW6gQkWj2fX5t_W2L8yPS4kB7LNW4bCMpB76sbcfW8HQbmB1jYXVqW3z7gvS4RQyqDW2m-_GF1rRzyWW8YFV7d3RkM6PW2SlbKK1b38vgW5BRLBc5gsSsLN1F96bb8HKknW6Kw5MY236V85W9bwMd23vGydfV9m_rw2FrZPTVsbfzf2qXgCBV7wQHN43MFwtf5-hpFs04 ) Not interested? 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- Accession
- nse/langchain/2026-10-28/5373
- From
- LangChain · hello@mail.langchain.com
- Sent
- 28 October 2026 · 15:00 UTC
