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The middleware captures the result automatically:",[449,829,832],{"className":451,"code":830,"filename":831,"language":454,"meta":455,"style":455},"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",[432,833,834,853,871,875,897,913,929,933,949,973,989,995,999,1018],{"__ignoreMap":455},[459,835,836,838,840,843,845,847,849,851],{"class":461,"line":462},[459,837,466],{"class":465},[459,839,470],{"class":469},[459,841,842],{"class":473}," generateText",[459,844,477],{"class":469},[459,846,480],{"class":465},[459,848,483],{"class":469},[459,850,487],{"class":486},[459,852,490],{"class":469},[459,854,855,857,859,861,863,865,867,869],{"class":461,"line":493},[459,856,466],{"class":465},[459,858,470],{"class":469},[459,860,500],{"class":473},[459,862,477],{"class":469},[459,864,480],{"class":465},[459,866,483],{"class":469},[459,868,509],{"class":486},[459,870,490],{"class":469},[459,872,873],{"class":461,"line":514},[459,874,518],{"emptyLinePlaceholder":517},[459,876,877,879,881,883,885,887,889,891,893,895],{"class":461,"line":521},[459,878,524],{"class":465},[459,880,527],{"class":465},[459,882,531],{"class":530},[459,884,534],{"class":473},[459,886,538],{"class":537},[459,888,541],{"class":469},[459,890,545],{"class":544},[459,892,548],{"class":469},[459,894,551],{"class":537},[459,896,554],{"class":469},[459,898,899,901,903,905,907,909,911],{"class":461,"line":557},[459,900,560],{"class":537},[459,902,563],{"class":473},[459,904,566],{"class":469},[459,906,569],{"class":530},[459,908,534],{"class":572},[459,910,545],{"class":473},[459,912,577],{"class":572},[459,914,915,917,919,921,923,925,927],{"class":461,"line":580},[459,916,560],{"class":537},[459,918,585],{"class":473},[459,920,566],{"class":469},[459,922,500],{"class":530},[459,924,534],{"class":572},[459,926,594],{"class":473},[459,928,577],{"class":572},[459,930,931],{"class":461,"line":599},[459,932,518],{"emptyLinePlaceholder":517},[459,934,935,937,939,941,943,945,947],{"class":461,"line":625},[459,936,560],{"class":537},[459,938,690],{"class":473},[459,940,566],{"class":469},[459,942,613],{"class":465},[459,944,842],{"class":530},[459,946,534],{"class":572},[459,948,699],{"class":469},[459,950,951,953,955,957,959,961,963,965,967,969,971],{"class":461,"line":630},[459,952,705],{"class":572},[459,954,650],{"class":469},[459,956,585],{"class":473},[459,958,636],{"class":469},[459,960,714],{"class":530},[459,962,534],{"class":572},[459,964,658],{"class":469},[459,966,721],{"class":486},[459,968,658],{"class":469},[459,970,548],{"class":572},[459,972,728],{"class":469},[459,974,975,978,980,982,985,987],{"class":461,"line":680},[459,976,977],{"class":572},"    prompt",[459,979,650],{"class":469},[459,981,483],{"class":469},[459,983,984],{"class":486},"Summarize this document",[459,986,658],{"class":469},[459,988,728],{"class":469},[459,990,991,993],{"class":461,"line":685},[459,992,782],{"class":469},[459,994,577],{"class":572},[459,996,997],{"class":461,"line":702},[459,998,518],{"emptyLinePlaceholder":517},[459,1000,1001,1003,1005,1007,1009,1011,1013,1015],{"class":461,"line":731},[459,1002,795],{"class":465},[459,1004,470],{"class":469},[459,1006,750],{"class":572},[459,1008,650],{"class":469},[459,1010,690],{"class":473},[459,1012,636],{"class":469},[459,1014,768],{"class":473},[459,1016,1017],{"class":469}," }\n",[459,1019,1020,1022],{"class":461,"line":739},[459,1021,811],{"class":469},[459,1023,577],{"class":473},[441,1025,1027],{"id":1026},"multi-step-agents","Multi-step Agents",[428,1029,1030],{},"The middleware fires for each step automatically. Steps, tool calls, and tokens are accumulated across the agent loop:",[449,1032,1035],{"className":451,"code":1033,"filename":1034,"language":454,"meta":455,"style":455},"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",[432,1036,1037,1066,1085,1103,1107,1129,1145,1167,1185,1206,1212,1216,1234,1258,1277,1295,1301,1305,1315,1322,1333,1340],{"__ignoreMap":455},[459,1038,1039,1041,1043,1046,1048,1051,1053,1056,1058,1060,1062,1064],{"class":461,"line":462},[459,1040,466],{"class":465},[459,1042,470],{"class":469},[459,1044,1045],{"class":473}," ToolLoopAgent",[459,1047,661],{"class":469},[459,1049,1050],{"class":473}," createAgentUIStreamResponse",[459,1052,661],{"class":469},[459,1054,1055],{"class":473}," 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Use ",[432,1993,1994],{},"captureEmbed"," instead:",[449,1997,2000],{"className":451,"code":1998,"filename":1999,"language":454,"meta":455,"style":455},"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 }\n})\n","server\u002Fapi\u002Frag.post.ts",[432,2001,2002,2025,2043,2061,2065,2087,2103,2119,2123,2149,2176,2188,2194,2207,2214,2228,2240,2246,2250,2270,2274,2290,2314,2332,2338,2342,2360],{"__ignoreMap":455},[459,2003,2004,2006,2008,2011,2013,2015,2017,2019,2021,2023],{"class":461,"line":462},[459,2005,466],{"class":465},[459,2007,470],{"class":469},[459,2009,2010],{"class":473}," 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findSimilar",[459,2265,534],{"class":572},[459,2267,2162],{"class":473},[459,2269,577],{"class":572},[459,2271,2272],{"class":461,"line":808},[459,2273,518],{"emptyLinePlaceholder":517},[459,2275,2276,2278,2280,2282,2284,2286,2288],{"class":461,"line":1335},[459,2277,560],{"class":537},[459,2279,690],{"class":473},[459,2281,566],{"class":469},[459,2283,613],{"class":465},[459,2285,842],{"class":530},[459,2287,534],{"class":572},[459,2289,699],{"class":469},[459,2291,2292,2294,2296,2298,2300,2302,2304,2306,2308,2310,2312],{"class":461,"line":1342},[459,2293,705],{"class":572},[459,2295,650],{"class":469},[459,2297,585],{"class":473},[459,2299,636],{"class":469},[459,2301,714],{"class":530},[459,2303,534],{"class":572},[459,2305,658],{"class":469},[459,2307,721],{"class":486},[459,2309,658],{"class":469},[459,2311,548],{"class":572},[459,2313,728],{"class":469},[459,2315,2316,2318,2320,2323,2325,2328,2330],{"class":461,"line":1932},[459,2317,977],{"class":572},[459,2319,650],{"class":469},[459,2321,2322],{"class":530}," buildPrompt",[459,2324,534],{"class":572},[459,2326,2327],{"class":473},"docs",[459,2329,548],{"class":572},[459,2331,728],{"class":469},[459,2333,2334,2336],{"class":461,"line":1949},[459,2335,782],{"class":469},[459,2337,577],{"class":572},[459,2339,2340],{"class":461,"line":1964},[459,2341,518],{"emptyLinePlaceholder":517},[459,2343,2344,2346,2348,2350,2352,2354,2356,2358],{"class":461,"line":1970},[459,2345,795],{"class":465},[459,2347,470],{"class":469},[459,2349,750],{"class":572},[459,2351,650],{"class":469},[459,2353,690],{"class":473},[459,2355,636],{"class":469},[459,2357,768],{"class":473},[459,2359,1017],{"class":469},[459,2361,2363,2365],{"class":461,"line":2362},27,[459,2364,811],{"class":469},[459,2366,577],{"class":473},[428,2368,2369,2370,2373],{},"For ",[432,2371,2372],{},"embedMany",", pass the batch count:",[449,2375,2377],{"className":451,"code":2376,"language":454,"meta":455,"style":455},"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",[432,2378,2379,2407,2432,2444,2450],{"__ignoreMap":455},[459,2380,2381,2384,2386,2389,2391,2394,2396,2398,2400,2403,2405],{"class":461,"line":462},[459,2382,2383],{"class":537},"const",[459,2385,470],{"class":469},[459,2387,2388],{"class":473}," embeddings",[459,2390,661],{"class":469},[459,2392,2393],{"class":473}," usage ",[459,2395,811],{"class":469},[459,2397,566],{"class":469},[459,2399,613],{"class":465},[459,2401,2402],{"class":530}," embedMany",[459,2404,534],{"class":473},[459,2406,699],{"class":469},[459,2408,2409,2412,2414,2416,2418,2420,2422,2424,2426,2428,2430],{"class":461,"line":493},[459,2410,2411],{"class":572},"  model",[459,2413,650],{"class":469},[459,2415,2157],{"class":473},[459,2417,636],{"class":469},[459,2419,2162],{"class":530},[459,2421,534],{"class":473},[459,2423,658],{"class":469},[459,2425,2169],{"class":486},[459,2427,658],{"class":469},[459,2429,548],{"class":473},[459,2431,728],{"class":469},[459,2433,2434,2437,2439,2442],{"class":461,"line":514},[459,2435,2436],{"class":572},"  values",[459,2438,650],{"class":469},[459,2440,2441],{"class":473}," documents",[459,2443,728],{"class":469},[459,2445,2446,2448],{"class":461,"line":521},[459,2447,811],{"class":469},[459,2449,577],{"class":473},[459,2451,2452,2454,2456,2458,2460,2462,2464,2466,2469,2471,2473,2475,2477,2479,2482,2484,2486,2488,2491,2493],{"class":461,"line":557},[459,2453,487],{"class":473},[459,2455,636],{"class":469},[459,2457,1994],{"class":530},[459,2459,534],{"class":473},[459,2461,644],{"class":469},[459,2463,2136],{"class":473},[459,2465,661],{"class":469},[459,2467,2468],{"class":572}," model",[459,2470,650],{"class":469},[459,2472,483],{"class":469},[459,2474,2169],{"class":486},[459,2476,658],{"class":469},[459,2478,661],{"class":469},[459,2480,2481],{"class":572}," count",[459,2483,650],{"class":469},[459,2485,2441],{"class":473},[459,2487,636],{"class":469},[459,2489,2490],{"class":473},"length ",[459,2492,811],{"class":469},[459,2494,577],{"class":473},[441,2496,2498],{"id":2497},"multiple-models","Multiple Models",[428,2500,2501,2502,2504,2505,2508],{},"Wrap each model separately — they share the same accumulator. When more than one model is used, the wide event includes both ",[432,2503,1415],{}," (last model) and ",[432,2506,2507],{},"models"," (all unique models):",[2510,2511,2512,2666],"code-group",{},[449,2513,2515],{"className":451,"code":2514,"filename":453,"language":454,"meta":455,"style":455},"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",[432,2516,2517,2532,2536,2562,2587,2591,2629],{"__ignoreMap":455},[459,2518,2519,2521,2524,2527,2529],{"class":461,"line":462},[459,2520,2383],{"class":537},[459,2522,2523],{"class":473}," ai ",[459,2525,2526],{"class":469},"=",[459,2528,500],{"class":530},[459,2530,2531],{"class":473},"(log)\n",[459,2533,2534],{"class":461,"line":493},[459,2535,518],{"emptyLinePlaceholder":517},[459,2537,2538,2540,2543,2545,2547,2549,2551,2553,2555,2558,2560],{"class":461,"line":514},[459,2539,2383],{"class":537},[459,2541,2542],{"class":473}," fast ",[459,2544,2526],{"class":469},[459,2546,585],{"class":473},[459,2548,636],{"class":469},[459,2550,714],{"class":530},[459,2552,534],{"class":473},[459,2554,658],{"class":469},[459,2556,2557],{"class":486},"anthropic\u002Fclaude-haiku-4.5",[459,2559,658],{"class":469},[459,2561,577],{"class":473},[459,2563,2564,2566,2569,2571,2573,2575,2577,2579,2581,2583,2585],{"class":461,"line":521},[459,2565,2383],{"class":537},[459,2567,2568],{"class":473}," smart ",[459,2570,2526],{"class":469},[459,2572,585],{"class":473},[459,2574,636],{"class":469},[459,2576,714],{"class":530},[459,2578,534],{"class":473},[459,2580,658],{"class":469},[459,2582,721],{"class":486},[459,2584,658],{"class":469},[459,2586,577],{"class":473},[459,2588,2589],{"class":461,"line":557},[459,2590,518],{"emptyLinePlaceholder":517},[459,2592,2593,2595,2598,2600,2602,2604,2606,2608,2610,2612,2615,2617,2620,2622,2625,2627],{"class":461,"line":580},[459,2594,2383],{"class":537},[459,2596,2597],{"class":473}," classification ",[459,2599,2526],{"class":469},[459,2601,613],{"class":465},[459,2603,842],{"class":530},[459,2605,534],{"class":473},[459,2607,644],{"class":469},[459,2609,2468],{"class":572},[459,2611,650],{"class":469},[459,2613,2614],{"class":473}," fast",[459,2616,661],{"class":469},[459,2618,2619],{"class":572}," prompt",[459,2621,650],{"class":469},[459,2623,2624],{"class":473}," classifyPrompt ",[459,2626,811],{"class":469},[459,2628,577],{"class":473},[459,2630,2631,2633,2636,2638,2640,2642,2644,2646,2648,2650,2653,2655,2657,2659,2662,2664],{"class":461,"line":599},[459,2632,2383],{"class":537},[459,2634,2635],{"class":473}," response ",[459,2637,2526],{"class":469},[459,2639,613],{"class":465},[459,2641,842],{"class":530},[459,2643,534],{"class":473},[459,2645,644],{"class":469},[459,2647,2468],{"class":572},[459,2649,650],{"class":469},[459,2651,2652],{"class":473}," smart",[459,2654,661],{"class":469},[459,2656,2619],{"class":572},[459,2658,650],{"class":469},[459,2660,2661],{"class":473}," detailedPrompt ",[459,2663,811],{"class":469},[459,2665,577],{"class":473},[449,2667,2669],{"className":1352,"code":2668,"filename":1354,"language":1355,"meta":455,"style":455},"{\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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