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Use ",[519,617,618],{},"maxLength"," and ",[519,621,622],{},"transform"," rather than enabling raw capture in production.",[625,626,628],"h3",{"id":627},"capture-everything","Capture everything",[630,631,636],"pre",{"className":632,"code":633,"language":634,"meta":635,"style":635},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const ai = createAILogger(log, { toolInputs: true })\n","typescript","",[519,637,638],{"__ignoreMap":635},[639,640,643,647,651,655,659,662,665,668,672,675,679,682],"span",{"class":641,"line":642},"line",1,[639,644,646],{"class":645},"spNyl","const",[639,648,650],{"class":649},"sTEyZ"," ai ",[639,652,654],{"class":653},"sMK4o","=",[639,656,658],{"class":657},"s2Zo4"," createAILogger",[639,660,661],{"class":649},"(log",[639,663,664],{"class":653},",",[639,666,667],{"class":653}," {",[639,669,671],{"class":670},"swJcz"," toolInputs",[639,673,674],{"class":653},":",[639,676,678],{"class":677},"sfNiH"," true",[639,680,681],{"class":653}," }",[639,683,684],{"class":649},")\n",[625,686,688],{"id":687},"truncate-long-inputs","Truncate long inputs",[630,690,692],{"className":632,"code":691,"language":634,"meta":635,"style":635},"const ai = createAILogger(log, { toolInputs: { maxLength: 200 } })\n",[519,693,694],{"__ignoreMap":635},[639,695,696,698,700,702,704,706,708,710,712,714,716,719,721,725,727,729],{"class":641,"line":642},[639,697,646],{"class":645},[639,699,650],{"class":649},[639,701,654],{"class":653},[639,703,658],{"class":657},[639,705,661],{"class":649},[639,707,664],{"class":653},[639,709,667],{"class":653},[639,711,671],{"class":670},[639,713,674],{"class":653},[639,715,667],{"class":653},[639,717,718],{"class":670}," maxLength",[639,720,674],{"class":653},[639,722,724],{"class":723},"sbssI"," 200",[639,726,681],{"class":653},[639,728,681],{"class":653},[639,730,684],{"class":649},[625,732,734],{"id":733},"redact-sensitive-fields","Redact sensitive fields",[630,736,738],{"className":632,"code":737,"language":634,"meta":635,"style":635},"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",[519,739,740,757,767,781,809,857,866,872,878],{"__ignoreMap":635},[639,741,742,744,746,748,750,752,754],{"class":641,"line":642},[639,743,646],{"class":645},[639,745,650],{"class":649},[639,747,654],{"class":653},[639,749,658],{"class":657},[639,751,661],{"class":649},[639,753,664],{"class":653},[639,755,756],{"class":653}," {\n",[639,758,760,763,765],{"class":641,"line":759},2,[639,761,762],{"class":670},"  toolInputs",[639,764,674],{"class":653},[639,766,756],{"class":653},[639,768,770,773,775,778],{"class":641,"line":769},3,[639,771,772],{"class":670},"    maxLength",[639,774,674],{"class":653},[639,776,777],{"class":723}," 500",[639,779,780],{"class":653},",\n",[639,782,784,787,789,792,796,798,801,804,807],{"class":641,"line":783},4,[639,785,786],{"class":657},"    transform",[639,788,674],{"class":653},[639,790,791],{"class":653}," (",[639,793,795],{"class":794},"sHdIc","input",[639,797,664],{"class":653},[639,799,800],{"class":794}," toolName",[639,802,803],{"class":653},")",[639,805,806],{"class":645}," =>",[639,808,756],{"class":653},[639,810,812,816,818,821,824,827,831,834,837,840,842,845,847,849,852,854],{"class":641,"line":811},5,[639,813,815],{"class":814},"s7zQu","      if",[639,817,791],{"class":670},[639,819,820],{"class":649},"toolName",[639,822,823],{"class":653}," ===",[639,825,826],{"class":653}," '",[639,828,830],{"class":829},"sfazB","queryDB",[639,832,833],{"class":653},"'",[639,835,836],{"class":670},") ",[639,838,839],{"class":814},"return",[639,841,667],{"class":653},[639,843,844],{"class":670}," sql",[639,846,674],{"class":653},[639,848,826],{"class":653},[639,850,851],{"class":829},"***",[639,853,833],{"class":653},[639,855,856],{"class":653}," }\n",[639,858,860,863],{"class":641,"line":859},6,[639,861,862],{"class":814},"      return",[639,864,865],{"class":649}," input\n",[639,867,869],{"class":641,"line":868},7,[639,870,871],{"class":653},"    },\n",[639,873,875],{"class":641,"line":874},8,[639,876,877],{"class":653},"  },\n",[639,879,881,884],{"class":641,"line":880},9,[639,882,883],{"class":653},"}",[639,885,684],{"class":649},[524,887,888,899],{},[527,889,890],{},[530,891,892,895,897],{},[533,893,894],{},"Sub-option",[533,896,538],{},[533,898,544],{},[546,900,901,919],{},[530,902,903,907,912],{},[551,904,905],{},[519,906,618],{},[551,908,909],{},[519,910,911],{},"number",[551,913,914,915,918],{},"Truncate stringified inputs exceeding this character length (appends ",[519,916,917],{},"…",").",[530,920,921,925,930],{},[551,922,923],{},[519,924,622],{},[551,926,927],{},[519,928,929],{},"(input, toolName) => unknown",[551,931,932,933,935],{},"Custom transform applied before ",[519,934,618],{},". Use to redact fields or reshape data.",[516,937,938,939,941,942,944,945,948],{},"When ",[519,940,555],{}," is enabled, ",[519,943,603],{}," becomes an ",[519,946,947],{},"Array\u003C{ name, input }>"," instead of a plain string array.",[594,950,952],{"id":951},"cost-estimation","Cost Estimation",[516,954,955,956,958,959,962],{},"Pass a ",[519,957,575],{}," map to compute estimated dollar cost per call. The middleware multiplies token usage by the per-million rates and sets ",[519,960,961],{},"ai.estimatedCost"," on the wide event.",[630,964,966],{"className":632,"code":965,"language":634,"meta":635,"style":635},"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",[519,967,968,984,993,1028,1059,1063],{"__ignoreMap":635},[639,969,970,972,974,976,978,980,982],{"class":641,"line":642},[639,971,646],{"class":645},[639,973,650],{"class":649},[639,975,654],{"class":653},[639,977,658],{"class":657},[639,979,661],{"class":649},[639,981,664],{"class":653},[639,983,756],{"class":653},[639,985,986,989,991],{"class":641,"line":759},[639,987,988],{"class":670},"  cost",[639,990,674],{"class":653},[639,992,756],{"class":653},[639,994,995,998,1001,1003,1005,1007,1010,1012,1015,1017,1020,1022,1025],{"class":641,"line":769},[639,996,997],{"class":653},"    '",[639,999,1000],{"class":670},"claude-sonnet-4.6",[639,1002,833],{"class":653},[639,1004,674],{"class":653},[639,1006,667],{"class":653},[639,1008,1009],{"class":670}," input",[639,1011,674],{"class":653},[639,1013,1014],{"class":723}," 3",[639,1016,664],{"class":653},[639,1018,1019],{"class":670}," output",[639,1021,674],{"class":653},[639,1023,1024],{"class":723}," 15",[639,1026,1027],{"class":653}," },\n",[639,1029,1030,1032,1035,1037,1039,1041,1043,1045,1048,1050,1052,1054,1057],{"class":641,"line":783},[639,1031,997],{"class":653},[639,1033,1034],{"class":670},"gpt-4o",[639,1036,833],{"class":653},[639,1038,674],{"class":653},[639,1040,667],{"class":653},[639,1042,1009],{"class":670},[639,1044,674],{"class":653},[639,1046,1047],{"class":723}," 2.5",[639,1049,664],{"class":653},[639,1051,1019],{"class":670},[639,1053,674],{"class":653},[639,1055,1056],{"class":723}," 10",[639,1058,1027],{"class":653},[639,1060,1061],{"class":641,"line":811},[639,1062,877],{"class":653},[639,1064,1065,1067],{"class":641,"line":859},[639,1066,883],{"class":653},[639,1068,684],{"class":649},[516,1070,1071,1072,1078],{},"Read the result from your handler with ",[1073,1074,1075],"a",{"href":327},[519,1076,1077],{},"ai.getEstimatedCost()"," — useful for billing dashboards or warning users before expensive calls.",[1080,1081,1082,1083,1085],"tip",{},"Keep your ",[519,1084,575],{}," map in one file alongside model selection so renaming a model in production also updates pricing. Avoid hardcoding per-route maps.",[594,1087,1089],{"id":1088},"error-handling","Error Handling",[516,1091,1092],{},"If a model call fails, the middleware captures the error into the wide event before re-throwing:",[630,1094,1099],{"className":1095,"code":1096,"filename":1097,"language":1098,"meta":635,"style":635},"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",[519,1100,1101,1106,1121,1139,1159,1179,1199,1217,1222],{"__ignoreMap":635},[639,1102,1103],{"class":641,"line":642},[639,1104,1105],{"class":653},"{\n",[639,1107,1108,1111,1114,1117,1119],{"class":641,"line":759},[639,1109,1110],{"class":653},"  \"",[639,1112,1113],{"class":645},"ai",[639,1115,1116],{"class":653},"\"",[639,1118,674],{"class":653},[639,1120,756],{"class":653},[639,1122,1123,1126,1130,1132,1134,1137],{"class":641,"line":769},[639,1124,1125],{"class":653},"    \"",[639,1127,1129],{"class":1128},"sBMFI","calls",[639,1131,1116],{"class":653},[639,1133,674],{"class":653},[639,1135,1136],{"class":723}," 1",[639,1138,780],{"class":653},[639,1140,1141,1143,1146,1148,1150,1153,1155,1157],{"class":641,"line":783},[639,1142,1125],{"class":653},[639,1144,1145],{"class":1128},"model",[639,1147,1116],{"class":653},[639,1149,674],{"class":653},[639,1151,1152],{"class":653}," \"",[639,1154,1000],{"class":829},[639,1156,1116],{"class":653},[639,1158,780],{"class":653},[639,1160,1161,1163,1166,1168,1170,1172,1175,1177],{"class":641,"line":811},[639,1162,1125],{"class":653},[639,1164,1165],{"class":1128},"provider",[639,1167,1116],{"class":653},[639,1169,674],{"class":653},[639,1171,1152],{"class":653},[639,1173,1174],{"class":829},"anthropic",[639,1176,1116],{"class":653},[639,1178,780],{"class":653},[639,1180,1181,1183,1186,1188,1190,1192,1195,1197],{"class":641,"line":859},[639,1182,1125],{"class":653},[639,1184,1185],{"class":1128},"finishReason",[639,1187,1116],{"class":653},[639,1189,674],{"class":653},[639,1191,1152],{"class":653},[639,1193,1194],{"class":829},"error",[639,1196,1116],{"class":653},[639,1198,780],{"class":653},[639,1200,1201,1203,1205,1207,1209,1211,1214],{"class":641,"line":868},[639,1202,1125],{"class":653},[639,1204,1194],{"class":1128},[639,1206,1116],{"class":653},[639,1208,674],{"class":653},[639,1210,1152],{"class":653},[639,1212,1213],{"class":829},"API rate limit exceeded",[639,1215,1216],{"class":653},"\"\n",[639,1218,1219],{"class":641,"line":874},[639,1220,1221],{"class":653},"  }\n",[639,1223,1224],{"class":641,"line":880},[639,1225,1226],{"class":653},"}\n",[516,1228,1229,1230,1233],{},"Stream errors (e.g. content filter) are also captured from the stream's error chunks. Your error-handling code (",[519,1231,1232],{},"try\u002Fcatch",", route-level error handlers) keeps working as usual — the middleware only observes.",[1235,1236,1237],"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":635,"searchDepth":759,"depth":759,"links":1239},[1240,1245,1246],{"id":596,"depth":759,"text":597,"children":1241},[1242,1243,1244],{"id":627,"depth":769,"text":628},{"id":687,"depth":769,"text":688},{"id":733,"depth":769,"text":734},{"id":951,"depth":759,"text":952},{"id":1088,"depth":759,"text":1089},"Configure tool input capture (with redaction and truncation), enable cost estimation per model, and handle errors during AI calls.","md",[1250,1253],{"label":36,"icon":39,"to":313,"color":1251,"variant":1252},"neutral","subtle",{"label":1254,"icon":319,"to":317,"color":1251,"variant":1252},"Usage Patterns",{},{"title":321,"icon":324},{"title":321,"description":1247},"k7Xm9_TcThZFVYxRgR4ikKafIXVxXYfDNbM3H99Fklk",[1260,1262],{"title":316,"path":317,"stem":318,"description":1261,"icon":319,"children":-1},"streamText, generateText, multi-step agents, RAG, and multiple models — every common AI SDK pattern wired into evlog.",{"title":326,"path":327,"stem":328,"description":1263,"icon":329,"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.",1785604596855]