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messagesCount",[554,760,744],{"class":564},[554,762,700],{"class":568},[554,764,730],{"class":564},[554,766,767],{"class":568},"length",[554,769,572],{"class":564},[554,771,671],{"class":666},[554,773,775],{"class":556,"line":774},10,[554,776,612],{"emptyLinePlaceholder":611},[554,778,780,782,785,787,789,791],{"class":556,"line":779},11,[554,781,654],{"class":631},[554,783,784],{"class":568}," result",[554,786,660],{"class":564},[554,788,569],{"class":624},[554,790,628],{"class":666},[554,792,793],{"class":564},"{\n",[554,795,797,800,802,804,806,809,811,813,816,818,820],{"class":556,"line":796},12,[554,798,799],{"class":666},"    model",[554,801,744],{"class":564},[554,803,679],{"class":568},[554,805,730],{"class":564},[554,807,808],{"class":624},"wrap",[554,810,628],{"class":666},[554,812,752],{"class":564},[554,814,815],{"class":581},"anthropic\u002Fclaude-sonnet-4.6",[554,817,752],{"class":564},[554,819,642],{"class":666},[554,821,822],{"class":564},",\n",[554,824,826,829],{"class":556,"line":825},13,[554,827,828],{"class":568},"    messages",[554,830,822],{"class":564},[554,832,834,837,839,842,845,848,850],{"class":556,"line":833},14,[554,835,836],{"class":624},"    onFinish",[554,838,744],{"class":564},[554,840,841],{"class":564}," ({",[554,843,844],{"class":638}," text",[554,846,847],{"class":564}," })",[554,849,645],{"class":631},[554,851,648],{"class":564},[554,853,855,858,860,863],{"class":556,"line":854},15,[554,856,857],{"class":624},"      saveConversation",[554,859,628],{"class":666},[554,861,862],{"class":568},"text",[554,864,671],{"class":666},[554,866,868],{"class":556,"line":867},16,[554,869,870],{"class":564},"    },\n",[554,872,874,877],{"class":556,"line":873},17,[554,875,876],{"class":564},"  }",[554,878,671],{"class":666},[554,880,882],{"class":556,"line":881},18,[554,883,612],{"emptyLinePlaceholder":611},[554,885,887,890,892,894,897],{"class":556,"line":886},19,[554,888,889],{"class":560},"  return",[554,891,784],{"class":568},[554,893,730],{"class":564},[554,895,896],{"class":624},"toTextStreamResponse",[554,898,899],{"class":666},"()\n",[554,901,903,906],{"class":556,"line":902},20,[554,904,905],{"class":564},"}",[554,907,671],{"class":568},[512,909,910,911,914],{},"The middleware never touches your ",[516,912,913],{},"onFinish"," callback — your code runs as usual.",[536,916,918],{"id":917},"generatetext","generateText",[512,920,921],{},"Synchronous generation. The middleware captures the result automatically:",[544,923,926],{"className":546,"code":924,"filename":925,"language":549,"meta":550,"style":550},"import { generateText } from 'ai'\nimport { createAILogger } from 'evlog\u002Fai'\n\nexport default defineEventHandler(async (event) => {\n  const log = useLogger(event)\n  const ai = createAILogger(log)\n\n  const result = await generateText({\n    model: ai.wrap('anthropic\u002Fclaude-sonnet-4.6'),\n    prompt: 'Summarize this document',\n  })\n\n  return { text: result.text }\n})\n","server\u002Fapi\u002Fsummarize.post.ts",[516,927,928,947,965,969,991,1007,1023,1027,1043,1067,1083,1089,1093,1112],{"__ignoreMap":550},[554,929,930,932,934,937,939,941,943,945],{"class":556,"line":557},[554,931,561],{"class":560},[554,933,565],{"class":564},[554,935,936],{"class":568}," generateText",[554,938,572],{"class":564},[554,940,575],{"class":560},[554,942,578],{"class":564},[554,944,533],{"class":581},[554,946,584],{"class":564},[554,948,949,951,953,955,957,959,961,963],{"class":556,"line":587},[554,950,561],{"class":560},[554,952,565],{"class":564},[554,954,594],{"class":568},[554,956,572],{"class":564},[554,958,575],{"class":560},[554,960,578],{"class":564},[554,962,603],{"class":581},[554,964,584],{"class":564},[554,966,967],{"class":556,"line":608},[554,968,612],{"emptyLinePlaceholder":611},[554,970,971,973,975,977,979,981,983,985,987,989],{"class":556,"line":615},[554,972,618],{"class":560},[554,974,621],{"class":560},[554,976,625],{"class":624},[554,978,628],{"class":568},[554,980,632],{"class":631},[554,982,635],{"class":564},[554,984,639],{"class":638},[554,986,642],{"class":564},[554,988,645],{"class":631},[554,990,648],{"class":564},[554,992,993,995,997,999,1001,1003,1005],{"class":556,"line":651},[554,994,654],{"class":631},[554,996,657],{"class":568},[554,998,660],{"class":564},[554,1000,663],{"class":624},[554,1002,628],{"class":666},[554,1004,639],{"class":568},[554,1006,671],{"class":666},[554,1008,1009,1011,1013,1015,1017,1019,1021],{"class":556,"line":674},[554,1010,654],{"class":631},[554,1012,679],{"class":568},[554,1014,660],{"class":564},[554,1016,594],{"class":624},[554,1018,628],{"class":666},[554,1020,688],{"class":568},[554,1022,671],{"class":666},[554,1024,1025],{"class":556,"line":693},[554,1026,612],{"emptyLinePlaceholder":611},[554,1028,1029,1031,1033,1035,1037,1039,1041],{"class":556,"line":719},[554,1030,654],{"class":631},[554,1032,784],{"class":568},[554,1034,660],{"class":564},[554,1036,707],{"class":560},[554,1038,936],{"class":624},[554,1040,628],{"class":666},[554,1042,793],{"class":564},[554,1044,1045,1047,1049,1051,1053,1055,1057,1059,1061,1063,1065],{"class":556,"line":724},[554,1046,799],{"class":666},[554,1048,744],{"class":564},[554,1050,679],{"class":568},[554,1052,730],{"class":564},[554,1054,808],{"class":624},[554,1056,628],{"class":666},[554,1058,752],{"class":564},[554,1060,815],{"class":581},[554,1062,752],{"class":564},[554,1064,642],{"class":666},[554,1066,822],{"class":564},[554,1068,1069,1072,1074,1076,1079,1081],{"class":556,"line":774},[554,1070,1071],{"class":666},"    prompt",[554,1073,744],{"class":564},[554,1075,578],{"class":564},[554,1077,1078],{"class":581},"Summarize this document",[554,1080,752],{"class":564},[554,1082,822],{"class":564},[554,1084,1085,1087],{"class":556,"line":779},[554,1086,876],{"class":564},[554,1088,671],{"class":666},[554,1090,1091],{"class":556,"line":796},[554,1092,612],{"emptyLinePlaceholder":611},[554,1094,1095,1097,1099,1101,1103,1105,1107,1109],{"class":556,"line":825},[554,1096,889],{"class":560},[554,1098,565],{"class":564},[554,1100,844],{"class":666},[554,1102,744],{"class":564},[554,1104,784],{"class":568},[554,1106,730],{"class":564},[554,1108,862],{"class":568},[554,1110,1111],{"class":564}," }\n",[554,1113,1114,1116],{"class":556,"line":833},[554,1115,905],{"class":564},[554,1117,671],{"class":568},[536,1119,1121],{"id":1120},"multi-step-agents","Multi-step Agents",[512,1123,1124],{},"The middleware fires for each step automatically. Steps, tool calls, and tokens are accumulated across the agent loop:",[544,1126,1129],{"className":546,"code":1127,"filename":1128,"language":549,"meta":550,"style":550},"import { ToolLoopAgent, createAgentUIStreamResponse, stepCountIs } from 'ai'\nimport { useLogger } from 'evlog'\nimport { createAILogger } from 'evlog\u002Fai'\n\nexport default defineEventHandler(async (event) => {\n  const log = useLogger(event)\n  const { messages } = await readBody(event)\n  const ai = createAILogger(log, {\n    toolInputs: { maxLength: 500 },\n  })\n\n  const agent = new ToolLoopAgent({\n    model: ai.wrap('anthropic\u002Fclaude-sonnet-4.6'),\n    tools: { searchWeb, queryDatabase },\n    stopWhen: stepCountIs(5),\n  })\n\n  return createAgentUIStreamResponse({\n    agent,\n    uiMessages: messages,\n  })\n})\n","server\u002Fapi\u002Fagent.post.ts",[516,1130,1131,1160,1179,1197,1201,1223,1239,1261,1279,1300,1306,1310,1328,1352,1371,1389,1395,1399,1409,1416,1427,1434],{"__ignoreMap":550},[554,1132,1133,1135,1137,1140,1142,1145,1147,1150,1152,1154,1156,1158],{"class":556,"line":557},[554,1134,561],{"class":560},[554,1136,565],{"class":564},[554,1138,1139],{"class":568}," ToolLoopAgent",[554,1141,755],{"class":564},[554,1143,1144],{"class":568}," createAgentUIStreamResponse",[554,1146,755],{"class":564},[554,1148,1149],{"class":568}," stepCountIs",[554,1151,572],{"class":564},[554,1153,575],{"class":560},[554,1155,578],{"class":564},[554,1157,533],{"class":581},[554,1159,584],{"class":564},[554,1161,1162,1164,1166,1168,1170,1172,1174,1177],{"class":556,"line":587},[554,1163,561],{"class":560},[554,1165,565],{"class":564},[554,1167,663],{"class":568},[554,1169,572],{"class":564},[554,1171,575],{"class":560},[554,1173,578],{"class":564},[554,1175,1176],{"class":581},"evlog",[554,1178,584],{"class":564},[554,1180,1181,1183,1185,1187,1189,1191,1193,1195],{"class":556,"line":608},[554,1182,561],{"class":560},[554,1184,565],{"class":564},[554,1186,594],{"class":568},[554,1188,572],{"class":564},[554,1190,575],{"class":560},[554,1192,578],{"class":564},[554,1194,603],{"class":581},[554,1196,584],{"class":564},[554,1198,1199],{"class":556,"line":615},[554,1200,612],{"emptyLinePlaceholder":611},[554,1202,1203,1205,1207,1209,1211,1213,1215,1217,1219,1221],{"class":556,"line":651},[554,1204,618],{"class":560},[554,1206,621],{"class":560},[554,1208,625],{"class":624},[554,1210,628],{"class":568},[554,1212,632],{"class":631},[554,1214,635],{"class":564},[554,1216,639],{"class":638},[554,1218,642],{"class":564},[554,1220,645],{"class":631},[554,1222,648],{"class":564},[554,1224,1225,1227,1229,1231,1233,1235,1237],{"class":556,"line":674},[554,1226,654],{"class":631},[554,1228,657],{"class":568},[554,1230,660],{"class":564},[554,1232,663],{"class":624},[554,1234,628],{"class":666},[554,1236,639],{"class":568},[554,1238,671],{"class":666},[554,1240,1241,1243,1245,1247,1249,1251,1253,1255,1257,1259],{"class":556,"line":693},[554,1242,654],{"class":631},[554,1244,565],{"class":564},[554,1246,700],{"class":568},[554,1248,572],{"class":564},[554,1250,660],{"class":564},[554,1252,707],{"class":560},[554,1254,710],{"class":624},[554,1256,628],{"class":666},[554,1258,639],{"class":568},[554,1260,671],{"class":666},[554,1262,1263,1265,1267,1269,1271,1273,1275,1277],{"class":556,"line":719},[554,1264,654],{"class":631},[554,1266,679],{"class":568},[554,1268,660],{"class":564},[554,1270,594],{"class":624},[554,1272,628],{"class":666},[554,1274,688],{"class":568},[554,1276,755],{"class":564},[554,1278,648],{"class":564},[554,1280,1281,1284,1286,1288,1291,1293,1297],{"class":556,"line":724},[554,1282,1283],{"class":666}," 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uiMessages",[554,1422,744],{"class":564},[554,1424,700],{"class":568},[554,1426,822],{"class":564},[554,1428,1430,1432],{"class":556,"line":1429},21,[554,1431,876],{"class":564},[554,1433,671],{"class":666},[554,1435,1437,1439],{"class":556,"line":1436},22,[554,1438,905],{"class":564},[554,1440,671],{"class":568},[512,1442,1443],{},"Wide event after a 3-step agent run:",[544,1445,1450],{"className":1446,"code":1447,"filename":1448,"language":1449,"meta":550,"style":550},"language-json shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","{\n  \"ai\": {\n    \"calls\": 3,\n    \"steps\": 3,\n    \"model\": \"claude-sonnet-4.6\",\n    \"provider\": \"anthropic\",\n    \"inputTokens\": 4500,\n    \"outputTokens\": 1200,\n    \"totalTokens\": 5700,\n    \"finishReason\": \"stop\",\n    \"toolCalls\": [\n      { \"name\": \"searchWeb\", \"input\": { \"query\": \"TypeScript 6.0 features\" } },\n      { \"name\": \"queryDatabase\", \"input\": { \"sql\": \"SELECT * FROM docs WHERE topic = 'typescript'\" } },\n      { \"name\": \"searchWeb\", \"input\": { \"query\": \"TypeScript 6.0 release date\" } }\n    ],\n    \"responseId\": \"msg_01XFDUDYJgAACzvnptvVoYEL\",\n    \"stepsUsage\": [\n      { \"model\": \"claude-sonnet-4.6\", \"inputTokens\": 1200, \"outputTokens\": 300, \"toolCalls\": [\"searchWeb\"] },\n      { \"model\": \"claude-sonnet-4.6\", \"inputTokens\": 1500, \"outputTokens\": 400, \"toolCalls\": [\"queryDatabase\", \"searchWeb\"] },\n      { \"model\": \"claude-sonnet-4.6\", \"inputTokens\": 1800, \"outputTokens\": 500 }\n    ],\n    \"msToFirstChunk\": 312,\n    \"msToFinish\": 8200,\n    \"tokensPerSecond\": 146\n  }\n}\n","Wide 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Use ",[516,2087,2088],{},"captureEmbed"," instead:",[544,2091,2094],{"className":546,"code":2092,"filename":2093,"language":549,"meta":550,"style":550},"import { embed, generateText } from 'ai'\nimport { useLogger } from 'evlog'\nimport { createAILogger } from 'evlog\u002Fai'\n\nexport default defineEventHandler(async (event) => {\n  const log = useLogger(event)\n  const ai = createAILogger(log)\n\n  const { embedding, usage } = await embed({\n    model: openai.embedding('text-embedding-3-small'),\n    value: query,\n  })\n  ai.captureEmbed({\n    usage,\n    model: 'text-embedding-3-small',\n    dimensions: 1536,\n  })\n\n  const docs = await findSimilar(embedding)\n\n  const result = await generateText({\n    model: ai.wrap('anthropic\u002Fclaude-sonnet-4.6'),\n    prompt: buildPrompt(docs),\n  })\n\n  return { text: result.text 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buildPrompt",[554,2418,628],{"class":666},[554,2420,2421],{"class":568},"docs",[554,2423,642],{"class":666},[554,2425,822],{"class":564},[554,2427,2428,2430],{"class":556,"line":2043},[554,2429,876],{"class":564},[554,2431,671],{"class":666},[554,2433,2434],{"class":556,"line":2058},[554,2435,612],{"emptyLinePlaceholder":611},[554,2437,2438,2440,2442,2444,2446,2448,2450,2452],{"class":556,"line":2064},[554,2439,889],{"class":560},[554,2441,565],{"class":564},[554,2443,844],{"class":666},[554,2445,744],{"class":564},[554,2447,784],{"class":568},[554,2449,730],{"class":564},[554,2451,862],{"class":568},[554,2453,1111],{"class":564},[554,2455,2457,2459],{"class":556,"line":2456},27,[554,2458,905],{"class":564},[554,2460,671],{"class":568},[512,2462,2463,2464,2467],{},"For ",[516,2465,2466],{},"embedMany",", pass the batch count:",[544,2469,2471],{"className":546,"code":2470,"language":549,"meta":550,"style":550},"const { embeddings, usage } = await embedMany({\n  model: openai.embedding('text-embedding-3-small'),\n  values: documents,\n})\nai.captureEmbed({ usage, model: 'text-embedding-3-small', count: documents.length })\n",[516,2472,2473,2501,2526,2538,2544],{"__ignoreMap":550},[554,2474,2475,2478,2480,2483,2485,2488,2490,2492,2494,2497,2499],{"class":556,"line":557},[554,2476,2477],{"class":631},"const",[554,2479,565],{"class":564},[554,2481,2482],{"class":568}," embeddings",[554,2484,755],{"class":564},[554,2486,2487],{"class":568}," usage ",[554,2489,905],{"class":564},[554,2491,660],{"class":564},[554,2493,707],{"class":560},[554,2495,2496],{"class":624}," embedMany",[554,2498,628],{"class":568},[554,2500,793],{"class":564},[554,2502,2503,2506,2508,2510,2512,2514,2516,2518,2520,2522,2524],{"class":556,"line":587},[554,2504,2505],{"class":666},"  model",[554,2507,744],{"class":564},[554,2509,2251],{"class":568},[554,2511,730],{"class":564},[554,2513,2256],{"class":624},[554,2515,628],{"class":568},[554,2517,752],{"class":564},[554,2519,2263],{"class":581},[554,2521,752],{"class":564},[554,2523,642],{"class":568},[554,2525,822],{"class":564},[554,2527,2528,2531,2533,2536],{"class":556,"line":608},[554,2529,2530],{"class":666},"  values",[554,2532,744],{"class":564},[554,2534,2535],{"class":568}," documents",[554,2537,822],{"class":564},[554,2539,2540,2542],{"class":556,"line":615},[554,2541,905],{"class":564},[554,2543,671],{"class":568},[554,2545,2546,2548,2550,2552,2554,2556,2558,2560,2563,2565,2567,2569,2571,2573,2576,2578,2580,2582,2585,2587],{"class":556,"line":651},[554,2547,533],{"class":568},[554,2549,730],{"class":564},[554,2551,2088],{"class":624},[554,2553,628],{"class":568},[554,2555,738],{"class":564},[554,2557,2230],{"class":568},[554,2559,755],{"class":564},[554,2561,2562],{"class":666}," model",[554,2564,744],{"class":564},[554,2566,578],{"class":564},[554,2568,2263],{"class":581},[554,2570,752],{"class":564},[554,2572,755],{"class":564},[554,2574,2575],{"class":666}," count",[554,2577,744],{"class":564},[554,2579,2535],{"class":568},[554,2581,730],{"class":564},[554,2583,2584],{"class":568},"length ",[554,2586,905],{"class":564},[554,2588,671],{"class":568},[536,2590,2592],{"id":2591},"multiple-models","Multiple Models",[512,2594,2595,2596,2598,2599,2602],{},"Wrap each model separately — they share the same accumulator. When more than one model is used, the wide event includes both ",[516,2597,1509],{}," (last model) and ",[516,2600,2601],{},"models"," (all unique models):",[2604,2605,2606,2760],"code-group",{},[544,2607,2609],{"className":546,"code":2608,"filename":548,"language":549,"meta":550,"style":550},"const ai = createAILogger(log)\n\nconst fast = ai.wrap('anthropic\u002Fclaude-haiku-4.5')\nconst smart = ai.wrap('anthropic\u002Fclaude-sonnet-4.6')\n\nconst classification = await generateText({ model: fast, prompt: classifyPrompt })\nconst response = await generateText({ model: smart, prompt: detailedPrompt })\n",[516,2610,2611,2626,2630,2656,2681,2685,2723],{"__ignoreMap":550},[554,2612,2613,2615,2618,2621,2623],{"class":556,"line":557},[554,2614,2477],{"class":631},[554,2616,2617],{"class":568}," ai ",[554,2619,2620],{"class":564},"=",[554,2622,594],{"class":624},[554,2624,2625],{"class":568},"(log)\n",[554,2627,2628],{"class":556,"line":587},[554,2629,612],{"emptyLinePlaceholder":611},[554,2631,2632,2634,2637,2639,2641,2643,2645,2647,2649,2652,2654],{"class":556,"line":608},[554,2633,2477],{"class":631},[554,2635,2636],{"class":568}," fast ",[554,2638,2620],{"class":564},[554,2640,679],{"class":568},[554,2642,730],{"class":564},[554,2644,808],{"class":624},[554,2646,628],{"class":568},[554,2648,752],{"class":564},[554,2650,2651],{"class":581},"anthropic\u002Fclaude-haiku-4.5",[554,2653,752],{"class":564},[554,2655,671],{"class":568},[554,2657,2658,2660,2663,2665,2667,2669,2671,2673,2675,2677,2679],{"class":556,"line":615},[554,2659,2477],{"class":631},[554,2661,2662],{"class":568}," smart ",[554,2664,2620],{"class":564},[554,2666,679],{"class":568},[554,2668,730],{"class":564},[554,2670,808],{"class":624},[554,2672,628],{"class":568},[554,2674,752],{"class":564},[554,2676,815],{"class":581},[554,2678,752],{"class":564},[554,2680,671],{"class":568},[554,2682,2683],{"class":556,"line":651},[554,2684,612],{"emptyLinePlaceholder":611},[554,2686,2687,2689,2692,2694,2696,2698,2700,2702,2704,2706,2709,2711,2714,2716,2719,2721],{"class":556,"line":674},[554,2688,2477],{"class":631},[554,2690,2691],{"class":568}," classification ",[554,2693,2620],{"class":564},[554,2695,707],{"class":560},[554,2697,936],{"class":624},[554,2699,628],{"class":568},[554,2701,738],{"class":564},[554,2703,2562],{"class":666},[554,2705,744],{"class":564},[554,2707,2708],{"class":568}," fast",[554,2710,755],{"class":564},[554,2712,2713],{"class":666}," prompt",[554,2715,744],{"class":564},[554,2717,2718],{"class":568}," classifyPrompt ",[554,2720,905],{"class":564},[554,2722,671],{"class":568},[554,2724,2725,2727,2730,2732,2734,2736,2738,2740,2742,2744,2747,2749,2751,2753,2756,2758],{"class":556,"line":693},[554,2726,2477],{"class":631},[554,2728,2729],{"class":568}," response ",[554,2731,2620],{"class":564},[554,2733,707],{"class":560},[554,2735,936],{"class":624},[554,2737,628],{"class":568},[554,2739,738],{"class":564},[554,2741,2562],{"class":666},[554,2743,744],{"class":564},[554,2745,2746],{"class":568}," smart",[554,2748,755],{"class":564},[554,2750,2713],{"class":666},[554,2752,744],{"class":564},[554,2754,2755],{"class":568}," detailedPrompt ",[554,2757,905],{"class":564},[554,2759,671],{"class":568},[544,2761,2763],{"className":1446,"code":2762,"filename":1448,"language":1449,"meta":550,"style":550},"{\n  \"ai\": {\n    \"calls\": 2,\n    \"model\": \"claude-sonnet-4.6\",\n    \"models\": [\"claude-haiku-4.5\", \"claude-sonnet-4.6\"],\n    \"provider\": \"anthropic\",\n    \"inputTokens\": 450,\n    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