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Use ",[438,536,537],{},"maxLength"," and ",[438,540,541],{},"transform"," rather than enabling raw capture in production.",[544,545,547],"h3",{"id":546},"capture-everything","Capture everything",[549,550,555],"pre",{"className":551,"code":552,"language":553,"meta":554,"style":554},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const ai = createAILogger(log, { toolInputs: true })\n","typescript","",[438,556,557],{"__ignoreMap":554},[558,559,562,566,570,574,578,581,584,587,591,594,598,601],"span",{"class":560,"line":561},"line",1,[558,563,565],{"class":564},"spNyl","const",[558,567,569],{"class":568},"sTEyZ"," ai ",[558,571,573],{"class":572},"sMK4o","=",[558,575,577],{"class":576},"s2Zo4"," createAILogger",[558,579,580],{"class":568},"(log",[558,582,583],{"class":572},",",[558,585,586],{"class":572}," {",[558,588,590],{"class":589},"swJcz"," toolInputs",[558,592,593],{"class":572},":",[558,595,597],{"class":596},"sfNiH"," true",[558,599,600],{"class":572}," }",[558,602,603],{"class":568},")\n",[544,605,607],{"id":606},"truncate-long-inputs","Truncate long inputs",[549,609,611],{"className":551,"code":610,"language":553,"meta":554,"style":554},"const ai = createAILogger(log, { toolInputs: { maxLength: 200 } })\n",[438,612,613],{"__ignoreMap":554},[558,614,615,617,619,621,623,625,627,629,631,633,635,638,640,644,646,648],{"class":560,"line":561},[558,616,565],{"class":564},[558,618,569],{"class":568},[558,620,573],{"class":572},[558,622,577],{"class":576},[558,624,580],{"class":568},[558,626,583],{"class":572},[558,628,586],{"class":572},[558,630,590],{"class":589},[558,632,593],{"class":572},[558,634,586],{"class":572},[558,636,637],{"class":589}," maxLength",[558,639,593],{"class":572},[558,641,643],{"class":642},"sbssI"," 200",[558,645,600],{"class":572},[558,647,600],{"class":572},[558,649,603],{"class":568},[544,651,653],{"id":652},"redact-sensitive-fields","Redact sensitive fields",[549,655,657],{"className":551,"code":656,"language":553,"meta":554,"style":554},"const ai = createAILogger(log, {\n  toolInputs: {\n    maxLength: 500,\n    transform: (input, toolName) => {\n      if (toolName === 'queryDB') return { sql: '***' }\n      return input\n    },\n  },\n})\n",[438,658,659,676,686,700,728,776,785,791,797],{"__ignoreMap":554},[558,660,661,663,665,667,669,671,673],{"class":560,"line":561},[558,662,565],{"class":564},[558,664,569],{"class":568},[558,666,573],{"class":572},[558,668,577],{"class":576},[558,670,580],{"class":568},[558,672,583],{"class":572},[558,674,675],{"class":572}," {\n",[558,677,679,682,684],{"class":560,"line":678},2,[558,680,681],{"class":589},"  toolInputs",[558,683,593],{"class":572},[558,685,675],{"class":572},[558,687,689,692,694,697],{"class":560,"line":688},3,[558,690,691],{"class":589},"    maxLength",[558,693,593],{"class":572},[558,695,696],{"class":642}," 500",[558,698,699],{"class":572},",\n",[558,701,703,706,708,711,715,717,720,723,726],{"class":560,"line":702},4,[558,704,705],{"class":576},"    transform",[558,707,593],{"class":572},[558,709,710],{"class":572}," (",[558,712,714],{"class":713},"sHdIc","input",[558,716,583],{"class":572},[558,718,719],{"class":713}," toolName",[558,721,722],{"class":572},")",[558,724,725],{"class":564}," =>",[558,727,675],{"class":572},[558,729,731,735,737,740,743,746,750,753,756,759,761,764,766,768,771,773],{"class":560,"line":730},5,[558,732,734],{"class":733},"s7zQu","      if",[558,736,710],{"class":589},[558,738,739],{"class":568},"toolName",[558,741,742],{"class":572}," ===",[558,744,745],{"class":572}," '",[558,747,749],{"class":748},"sfazB","queryDB",[558,751,752],{"class":572},"'",[558,754,755],{"class":589},") ",[558,757,758],{"class":733},"return",[558,760,586],{"class":572},[558,762,763],{"class":589}," sql",[558,765,593],{"class":572},[558,767,745],{"class":572},[558,769,770],{"class":748},"***",[558,772,752],{"class":572},[558,774,775],{"class":572}," }\n",[558,777,779,782],{"class":560,"line":778},6,[558,780,781],{"class":733},"      return",[558,783,784],{"class":568}," input\n",[558,786,788],{"class":560,"line":787},7,[558,789,790],{"class":572},"    },\n",[558,792,794],{"class":560,"line":793},8,[558,795,796],{"class":572},"  },\n",[558,798,800,803],{"class":560,"line":799},9,[558,801,802],{"class":572},"}",[558,804,603],{"class":568},[443,806,807,818],{},[446,808,809],{},[449,810,811,814,816],{},[452,812,813],{},"Sub-option",[452,815,457],{},[452,817,463],{},[465,819,820,838],{},[449,821,822,826,831],{},[470,823,824],{},[438,825,537],{},[470,827,828],{},[438,829,830],{},"number",[470,832,833,834,837],{},"Truncate stringified inputs exceeding this character length (appends ",[438,835,836],{},"…",").",[449,839,840,844,849],{},[470,841,842],{},[438,843,541],{},[470,845,846],{},[438,847,848],{},"(input, toolName) => unknown",[470,850,851,852,854],{},"Custom transform applied before ",[438,853,537],{},". Use to redact fields or reshape data.",[435,856,857,858,860,861,863,864,867],{},"When ",[438,859,474],{}," is enabled, ",[438,862,522],{}," becomes an ",[438,865,866],{},"Array\u003C{ name, input }>"," instead of a plain string array.",[513,869,871],{"id":870},"cost-estimation","Cost Estimation",[435,873,874,875,877,878,881],{},"Pass a ",[438,876,494],{}," map to compute estimated dollar cost per call. The middleware multiplies token usage by the per-million rates and sets ",[438,879,880],{},"ai.estimatedCost"," on the wide event.",[549,883,885],{"className":551,"code":884,"language":553,"meta":554,"style":554},"const ai = createAILogger(log, {\n  cost: {\n    'claude-sonnet-4.6': { input: 3, output: 15 },\n    'gpt-4o': { input: 2.5, output: 10 },\n  },\n})\n",[438,886,887,903,912,947,978,982],{"__ignoreMap":554},[558,888,889,891,893,895,897,899,901],{"class":560,"line":561},[558,890,565],{"class":564},[558,892,569],{"class":568},[558,894,573],{"class":572},[558,896,577],{"class":576},[558,898,580],{"class":568},[558,900,583],{"class":572},[558,902,675],{"class":572},[558,904,905,908,910],{"class":560,"line":678},[558,906,907],{"class":589},"  cost",[558,909,593],{"class":572},[558,911,675],{"class":572},[558,913,914,917,920,922,924,926,929,931,934,936,939,941,944],{"class":560,"line":688},[558,915,916],{"class":572},"    '",[558,918,919],{"class":589},"claude-sonnet-4.6",[558,921,752],{"class":572},[558,923,593],{"class":572},[558,925,586],{"class":572},[558,927,928],{"class":589}," input",[558,930,593],{"class":572},[558,932,933],{"class":642}," 3",[558,935,583],{"class":572},[558,937,938],{"class":589}," output",[558,940,593],{"class":572},[558,942,943],{"class":642}," 15",[558,945,946],{"class":572}," },\n",[558,948,949,951,954,956,958,960,962,964,967,969,971,973,976],{"class":560,"line":702},[558,950,916],{"class":572},[558,952,953],{"class":589},"gpt-4o",[558,955,752],{"class":572},[558,957,593],{"class":572},[558,959,586],{"class":572},[558,961,928],{"class":589},[558,963,593],{"class":572},[558,965,966],{"class":642}," 2.5",[558,968,583],{"class":572},[558,970,938],{"class":589},[558,972,593],{"class":572},[558,974,975],{"class":642}," 10",[558,977,946],{"class":572},[558,979,980],{"class":560,"line":730},[558,981,796],{"class":572},[558,983,984,986],{"class":560,"line":778},[558,985,802],{"class":572},[558,987,603],{"class":568},[435,989,990,991,997],{},"Read the result from your handler with ",[992,993,994],"a",{"href":91},[438,995,996],{},"ai.getEstimatedCost()"," — useful for billing dashboards or warning users before expensive calls.",[999,1000,1001,1002,1004],"tip",{},"Keep your ",[438,1003,494],{}," map in one file alongside model selection so renaming a model in production also updates pricing. Avoid hardcoding per-route maps.",[513,1006,1008],{"id":1007},"error-handling","Error Handling",[435,1010,1011],{},"If a model call fails, the middleware captures the error into the wide event before re-throwing:",[549,1013,1018],{"className":1014,"code":1015,"filename":1016,"language":1017,"meta":554,"style":554},"language-json shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","{\n  \"ai\": {\n    \"calls\": 1,\n    \"model\": \"claude-sonnet-4.6\",\n    \"provider\": \"anthropic\",\n    \"finishReason\": \"error\",\n    \"error\": \"API rate limit exceeded\"\n  }\n}\n","Wide Event","json",[438,1019,1020,1025,1040,1058,1078,1098,1118,1136,1141],{"__ignoreMap":554},[558,1021,1022],{"class":560,"line":561},[558,1023,1024],{"class":572},"{\n",[558,1026,1027,1030,1033,1036,1038],{"class":560,"line":678},[558,1028,1029],{"class":572},"  \"",[558,1031,1032],{"class":564},"ai",[558,1034,1035],{"class":572},"\"",[558,1037,593],{"class":572},[558,1039,675],{"class":572},[558,1041,1042,1045,1049,1051,1053,1056],{"class":560,"line":688},[558,1043,1044],{"class":572},"    \"",[558,1046,1048],{"class":1047},"sBMFI","calls",[558,1050,1035],{"class":572},[558,1052,593],{"class":572},[558,1054,1055],{"class":642}," 1",[558,1057,699],{"class":572},[558,1059,1060,1062,1065,1067,1069,1072,1074,1076],{"class":560,"line":702},[558,1061,1044],{"class":572},[558,1063,1064],{"class":1047},"model",[558,1066,1035],{"class":572},[558,1068,593],{"class":572},[558,1070,1071],{"class":572}," \"",[558,1073,919],{"class":748},[558,1075,1035],{"class":572},[558,1077,699],{"class":572},[558,1079,1080,1082,1085,1087,1089,1091,1094,1096],{"class":560,"line":730},[558,1081,1044],{"class":572},[558,1083,1084],{"class":1047},"provider",[558,1086,1035],{"class":572},[558,1088,593],{"class":572},[558,1090,1071],{"class":572},[558,1092,1093],{"class":748},"anthropic",[558,1095,1035],{"class":572},[558,1097,699],{"class":572},[558,1099,1100,1102,1105,1107,1109,1111,1114,1116],{"class":560,"line":778},[558,1101,1044],{"class":572},[558,1103,1104],{"class":1047},"finishReason",[558,1106,1035],{"class":572},[558,1108,593],{"class":572},[558,1110,1071],{"class":572},[558,1112,1113],{"class":748},"error",[558,1115,1035],{"class":572},[558,1117,699],{"class":572},[558,1119,1120,1122,1124,1126,1128,1130,1133],{"class":560,"line":787},[558,1121,1044],{"class":572},[558,1123,1113],{"class":1047},[558,1125,1035],{"class":572},[558,1127,593],{"class":572},[558,1129,1071],{"class":572},[558,1131,1132],{"class":748},"API rate limit exceeded",[558,1134,1135],{"class":572},"\"\n",[558,1137,1138],{"class":560,"line":793},[558,1139,1140],{"class":572},"  }\n",[558,1142,1143],{"class":560,"line":799},[558,1144,1145],{"class":572},"}\n",[435,1147,1148,1149,1152],{},"Stream errors (e.g. content filter) are also captured from the stream's error chunks. Your error-handling code (",[438,1150,1151],{},"try\u002Fcatch",", route-level error handlers) keeps working as usual — the middleware only observes.",[1154,1155,1156],"style",{},"html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}",{"title":554,"searchDepth":678,"depth":678,"links":1158},[1159,1164,1165],{"id":515,"depth":678,"text":516,"children":1160},[1161,1162,1163],{"id":546,"depth":688,"text":547},{"id":606,"depth":688,"text":607},{"id":652,"depth":688,"text":653},{"id":870,"depth":678,"text":871},{"id":1007,"depth":678,"text":1008},"Configure tool input capture (with redaction and truncation), enable cost estimation per model, and handle errors during AI calls.","md",[1169,1172],{"label":41,"icon":44,"to":77,"color":1170,"variant":1171},"neutral","subtle",{"label":1173,"icon":83,"to":81,"color":1170,"variant":1171},"Usage Patterns",{},{"title":85,"icon":88},{"title":85,"description":1166},"wNWYlAoixuzpqUkoMmAWzxK3lYeBu_IxjZhS0DnZOSs",[1179,1181],{"title":80,"path":81,"stem":82,"description":1180,"icon":83,"children":-1},"streamText, generateText, multi-step agents, RAG, and multiple models — every common AI SDK pattern wired into evlog.",{"title":90,"path":91,"stem":92,"description":1182,"icon":93,"children":-1},"Read AI metadata from your handler — persist it, surface it to end-users, bill against it, or stream incremental progress to the client.",1778336622571]