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Use ",[514,612,613],{},"maxLength"," and ",[514,616,617],{},"transform"," rather than enabling raw capture in production.",[620,621,623],"h3",{"id":622},"capture-everything","Capture everything",[625,626,631],"pre",{"className":627,"code":628,"language":629,"meta":630,"style":630},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const ai = createAILogger(log, { toolInputs: true })\n","typescript","",[514,632,633],{"__ignoreMap":630},[634,635,638,642,646,650,654,657,660,663,667,670,674,677],"span",{"class":636,"line":637},"line",1,[634,639,641],{"class":640},"spNyl","const",[634,643,645],{"class":644},"sTEyZ"," ai ",[634,647,649],{"class":648},"sMK4o","=",[634,651,653],{"class":652},"s2Zo4"," createAILogger",[634,655,656],{"class":644},"(log",[634,658,659],{"class":648},",",[634,661,662],{"class":648}," {",[634,664,666],{"class":665},"swJcz"," toolInputs",[634,668,669],{"class":648},":",[634,671,673],{"class":672},"sfNiH"," true",[634,675,676],{"class":648}," }",[634,678,679],{"class":644},")\n",[620,681,683],{"id":682},"truncate-long-inputs","Truncate long inputs",[625,685,687],{"className":627,"code":686,"language":629,"meta":630,"style":630},"const ai = createAILogger(log, { toolInputs: { maxLength: 200 } })\n",[514,688,689],{"__ignoreMap":630},[634,690,691,693,695,697,699,701,703,705,707,709,711,714,716,720,722,724],{"class":636,"line":637},[634,692,641],{"class":640},[634,694,645],{"class":644},[634,696,649],{"class":648},[634,698,653],{"class":652},[634,700,656],{"class":644},[634,702,659],{"class":648},[634,704,662],{"class":648},[634,706,666],{"class":665},[634,708,669],{"class":648},[634,710,662],{"class":648},[634,712,713],{"class":665}," maxLength",[634,715,669],{"class":648},[634,717,719],{"class":718},"sbssI"," 200",[634,721,676],{"class":648},[634,723,676],{"class":648},[634,725,679],{"class":644},[620,727,729],{"id":728},"redact-sensitive-fields","Redact sensitive fields",[625,731,733],{"className":627,"code":732,"language":629,"meta":630,"style":630},"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",[514,734,735,752,762,776,804,852,861,867,873],{"__ignoreMap":630},[634,736,737,739,741,743,745,747,749],{"class":636,"line":637},[634,738,641],{"class":640},[634,740,645],{"class":644},[634,742,649],{"class":648},[634,744,653],{"class":652},[634,746,656],{"class":644},[634,748,659],{"class":648},[634,750,751],{"class":648}," {\n",[634,753,755,758,760],{"class":636,"line":754},2,[634,756,757],{"class":665},"  toolInputs",[634,759,669],{"class":648},[634,761,751],{"class":648},[634,763,765,768,770,773],{"class":636,"line":764},3,[634,766,767],{"class":665},"    maxLength",[634,769,669],{"class":648},[634,771,772],{"class":718}," 500",[634,774,775],{"class":648},",\n",[634,777,779,782,784,787,791,793,796,799,802],{"class":636,"line":778},4,[634,780,781],{"class":652},"    transform",[634,783,669],{"class":648},[634,785,786],{"class":648}," (",[634,788,790],{"class":789},"sHdIc","input",[634,792,659],{"class":648},[634,794,795],{"class":789}," toolName",[634,797,798],{"class":648},")",[634,800,801],{"class":640}," =>",[634,803,751],{"class":648},[634,805,807,811,813,816,819,822,826,829,832,835,837,840,842,844,847,849],{"class":636,"line":806},5,[634,808,810],{"class":809},"s7zQu","      if",[634,812,786],{"class":665},[634,814,815],{"class":644},"toolName",[634,817,818],{"class":648}," ===",[634,820,821],{"class":648}," '",[634,823,825],{"class":824},"sfazB","queryDB",[634,827,828],{"class":648},"'",[634,830,831],{"class":665},") ",[634,833,834],{"class":809},"return",[634,836,662],{"class":648},[634,838,839],{"class":665}," sql",[634,841,669],{"class":648},[634,843,821],{"class":648},[634,845,846],{"class":824},"***",[634,848,828],{"class":648},[634,850,851],{"class":648}," }\n",[634,853,855,858],{"class":636,"line":854},6,[634,856,857],{"class":809},"      return",[634,859,860],{"class":644}," input\n",[634,862,864],{"class":636,"line":863},7,[634,865,866],{"class":648},"    },\n",[634,868,870],{"class":636,"line":869},8,[634,871,872],{"class":648},"  },\n",[634,874,876,879],{"class":636,"line":875},9,[634,877,878],{"class":648},"}",[634,880,679],{"class":644},[519,882,883,894],{},[522,884,885],{},[525,886,887,890,892],{},[528,888,889],{},"Sub-option",[528,891,533],{},[528,893,539],{},[541,895,896,914],{},[525,897,898,902,907],{},[546,899,900],{},[514,901,613],{},[546,903,904],{},[514,905,906],{},"number",[546,908,909,910,913],{},"Truncate stringified inputs exceeding this character length (appends ",[514,911,912],{},"…",").",[525,915,916,920,925],{},[546,917,918],{},[514,919,617],{},[546,921,922],{},[514,923,924],{},"(input, toolName) => unknown",[546,926,927,928,930],{},"Custom transform applied before ",[514,929,613],{},". Use to redact fields or reshape data.",[511,932,933,934,936,937,939,940,943],{},"When ",[514,935,550],{}," is enabled, ",[514,938,598],{}," becomes an ",[514,941,942],{},"Array\u003C{ name, input }>"," instead of a plain string array.",[589,945,947],{"id":946},"cost-estimation","Cost Estimation",[511,949,950,951,953,954,957],{},"Pass a ",[514,952,570],{}," map to compute estimated dollar cost per call. The middleware multiplies token usage by the per-million rates and sets ",[514,955,956],{},"ai.estimatedCost"," on the wide event.",[625,959,961],{"className":627,"code":960,"language":629,"meta":630,"style":630},"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",[514,962,963,979,988,1023,1054,1058],{"__ignoreMap":630},[634,964,965,967,969,971,973,975,977],{"class":636,"line":637},[634,966,641],{"class":640},[634,968,645],{"class":644},[634,970,649],{"class":648},[634,972,653],{"class":652},[634,974,656],{"class":644},[634,976,659],{"class":648},[634,978,751],{"class":648},[634,980,981,984,986],{"class":636,"line":754},[634,982,983],{"class":665},"  cost",[634,985,669],{"class":648},[634,987,751],{"class":648},[634,989,990,993,996,998,1000,1002,1005,1007,1010,1012,1015,1017,1020],{"class":636,"line":764},[634,991,992],{"class":648},"    '",[634,994,995],{"class":665},"claude-sonnet-4.6",[634,997,828],{"class":648},[634,999,669],{"class":648},[634,1001,662],{"class":648},[634,1003,1004],{"class":665}," input",[634,1006,669],{"class":648},[634,1008,1009],{"class":718}," 3",[634,1011,659],{"class":648},[634,1013,1014],{"class":665}," output",[634,1016,669],{"class":648},[634,1018,1019],{"class":718}," 15",[634,1021,1022],{"class":648}," },\n",[634,1024,1025,1027,1030,1032,1034,1036,1038,1040,1043,1045,1047,1049,1052],{"class":636,"line":778},[634,1026,992],{"class":648},[634,1028,1029],{"class":665},"gpt-4o",[634,1031,828],{"class":648},[634,1033,669],{"class":648},[634,1035,662],{"class":648},[634,1037,1004],{"class":665},[634,1039,669],{"class":648},[634,1041,1042],{"class":718}," 2.5",[634,1044,659],{"class":648},[634,1046,1014],{"class":665},[634,1048,669],{"class":648},[634,1050,1051],{"class":718}," 10",[634,1053,1022],{"class":648},[634,1055,1056],{"class":636,"line":806},[634,1057,872],{"class":648},[634,1059,1060,1062],{"class":636,"line":854},[634,1061,878],{"class":648},[634,1063,679],{"class":644},[511,1065,1066,1067,1073],{},"Read the result from your handler with ",[1068,1069,1070],"a",{"href":322},[514,1071,1072],{},"ai.getEstimatedCost()"," — useful for billing dashboards or warning users before expensive calls.",[1075,1076,1077,1078,1080],"tip",{},"Keep your ",[514,1079,570],{}," map in one file alongside model selection so renaming a model in production also updates pricing. Avoid hardcoding per-route maps.",[589,1082,1084],{"id":1083},"error-handling","Error Handling",[511,1086,1087],{},"If a model call fails, the middleware captures the error into the wide event before re-throwing:",[625,1089,1094],{"className":1090,"code":1091,"filename":1092,"language":1093,"meta":630,"style":630},"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",[514,1095,1096,1101,1116,1134,1154,1174,1194,1212,1217],{"__ignoreMap":630},[634,1097,1098],{"class":636,"line":637},[634,1099,1100],{"class":648},"{\n",[634,1102,1103,1106,1109,1112,1114],{"class":636,"line":754},[634,1104,1105],{"class":648},"  \"",[634,1107,1108],{"class":640},"ai",[634,1110,1111],{"class":648},"\"",[634,1113,669],{"class":648},[634,1115,751],{"class":648},[634,1117,1118,1121,1125,1127,1129,1132],{"class":636,"line":764},[634,1119,1120],{"class":648},"    \"",[634,1122,1124],{"class":1123},"sBMFI","calls",[634,1126,1111],{"class":648},[634,1128,669],{"class":648},[634,1130,1131],{"class":718}," 1",[634,1133,775],{"class":648},[634,1135,1136,1138,1141,1143,1145,1148,1150,1152],{"class":636,"line":778},[634,1137,1120],{"class":648},[634,1139,1140],{"class":1123},"model",[634,1142,1111],{"class":648},[634,1144,669],{"class":648},[634,1146,1147],{"class":648}," \"",[634,1149,995],{"class":824},[634,1151,1111],{"class":648},[634,1153,775],{"class":648},[634,1155,1156,1158,1161,1163,1165,1167,1170,1172],{"class":636,"line":806},[634,1157,1120],{"class":648},[634,1159,1160],{"class":1123},"provider",[634,1162,1111],{"class":648},[634,1164,669],{"class":648},[634,1166,1147],{"class":648},[634,1168,1169],{"class":824},"anthropic",[634,1171,1111],{"class":648},[634,1173,775],{"class":648},[634,1175,1176,1178,1181,1183,1185,1187,1190,1192],{"class":636,"line":854},[634,1177,1120],{"class":648},[634,1179,1180],{"class":1123},"finishReason",[634,1182,1111],{"class":648},[634,1184,669],{"class":648},[634,1186,1147],{"class":648},[634,1188,1189],{"class":824},"error",[634,1191,1111],{"class":648},[634,1193,775],{"class":648},[634,1195,1196,1198,1200,1202,1204,1206,1209],{"class":636,"line":863},[634,1197,1120],{"class":648},[634,1199,1189],{"class":1123},[634,1201,1111],{"class":648},[634,1203,669],{"class":648},[634,1205,1147],{"class":648},[634,1207,1208],{"class":824},"API rate limit exceeded",[634,1210,1211],{"class":648},"\"\n",[634,1213,1214],{"class":636,"line":869},[634,1215,1216],{"class":648},"  }\n",[634,1218,1219],{"class":636,"line":875},[634,1220,1221],{"class":648},"}\n",[511,1223,1224,1225,1228],{},"Stream errors (e.g. content filter) are also captured from the stream's error chunks. Your error-handling code (",[514,1226,1227],{},"try\u002Fcatch",", route-level error handlers) keeps working as usual — the middleware only observes.",[1230,1231,1232],"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":630,"searchDepth":754,"depth":754,"links":1234},[1235,1240,1241],{"id":591,"depth":754,"text":592,"children":1236},[1237,1238,1239],{"id":622,"depth":764,"text":623},{"id":682,"depth":764,"text":683},{"id":728,"depth":764,"text":729},{"id":946,"depth":754,"text":947},{"id":1083,"depth":754,"text":1084},"Configure tool input capture (with redaction and truncation), enable cost estimation per model, and handle errors during AI calls.","md",[1245,1248],{"label":36,"icon":39,"to":308,"color":1246,"variant":1247},"neutral","subtle",{"label":1249,"icon":314,"to":312,"color":1246,"variant":1247},"Usage Patterns",{},{"title":316,"icon":319},{"title":316,"description":1242},"k7Xm9_TcThZFVYxRgR4ikKafIXVxXYfDNbM3H99Fklk",[1255,1257],{"title":311,"path":312,"stem":313,"description":1256,"icon":314,"children":-1},"streamText, generateText, multi-step agents, RAG, and multiple models — every common AI SDK pattern wired into evlog.",{"title":321,"path":322,"stem":323,"description":1258,"icon":324,"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.",1785224896466]