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Use ",[473,571,572],{},"maxLength"," and ",[473,575,576],{},"transform"," rather than enabling raw capture in production.",[579,580,582],"h3",{"id":581},"capture-everything","Capture everything",[584,585,590],"pre",{"className":586,"code":587,"language":588,"meta":589,"style":589},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const ai = createAILogger(log, { toolInputs: true })\n","typescript","",[473,591,592],{"__ignoreMap":589},[593,594,597,601,605,609,613,616,619,622,626,629,633,636],"span",{"class":595,"line":596},"line",1,[593,598,600],{"class":599},"spNyl","const",[593,602,604],{"class":603},"sTEyZ"," ai ",[593,606,608],{"class":607},"sMK4o","=",[593,610,612],{"class":611},"s2Zo4"," createAILogger",[593,614,615],{"class":603},"(log",[593,617,618],{"class":607},",",[593,620,621],{"class":607}," {",[593,623,625],{"class":624},"swJcz"," toolInputs",[593,627,628],{"class":607},":",[593,630,632],{"class":631},"sfNiH"," true",[593,634,635],{"class":607}," }",[593,637,638],{"class":603},")\n",[579,640,642],{"id":641},"truncate-long-inputs","Truncate long inputs",[584,644,646],{"className":586,"code":645,"language":588,"meta":589,"style":589},"const ai = createAILogger(log, { toolInputs: { maxLength: 200 } })\n",[473,647,648],{"__ignoreMap":589},[593,649,650,652,654,656,658,660,662,664,666,668,670,673,675,679,681,683],{"class":595,"line":596},[593,651,600],{"class":599},[593,653,604],{"class":603},[593,655,608],{"class":607},[593,657,612],{"class":611},[593,659,615],{"class":603},[593,661,618],{"class":607},[593,663,621],{"class":607},[593,665,625],{"class":624},[593,667,628],{"class":607},[593,669,621],{"class":607},[593,671,672],{"class":624}," maxLength",[593,674,628],{"class":607},[593,676,678],{"class":677},"sbssI"," 200",[593,680,635],{"class":607},[593,682,635],{"class":607},[593,684,638],{"class":603},[579,686,688],{"id":687},"redact-sensitive-fields","Redact sensitive fields",[584,690,692],{"className":586,"code":691,"language":588,"meta":589,"style":589},"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",[473,693,694,711,721,735,763,811,820,826,832],{"__ignoreMap":589},[593,695,696,698,700,702,704,706,708],{"class":595,"line":596},[593,697,600],{"class":599},[593,699,604],{"class":603},[593,701,608],{"class":607},[593,703,612],{"class":611},[593,705,615],{"class":603},[593,707,618],{"class":607},[593,709,710],{"class":607}," {\n",[593,712,714,717,719],{"class":595,"line":713},2,[593,715,716],{"class":624},"  toolInputs",[593,718,628],{"class":607},[593,720,710],{"class":607},[593,722,724,727,729,732],{"class":595,"line":723},3,[593,725,726],{"class":624},"    maxLength",[593,728,628],{"class":607},[593,730,731],{"class":677}," 500",[593,733,734],{"class":607},",\n",[593,736,738,741,743,746,750,752,755,758,761],{"class":595,"line":737},4,[593,739,740],{"class":611},"    transform",[593,742,628],{"class":607},[593,744,745],{"class":607}," (",[593,747,749],{"class":748},"sHdIc","input",[593,751,618],{"class":607},[593,753,754],{"class":748}," toolName",[593,756,757],{"class":607},")",[593,759,760],{"class":599}," =>",[593,762,710],{"class":607},[593,764,766,770,772,775,778,781,785,788,791,794,796,799,801,803,806,808],{"class":595,"line":765},5,[593,767,769],{"class":768},"s7zQu","      if",[593,771,745],{"class":624},[593,773,774],{"class":603},"toolName",[593,776,777],{"class":607}," ===",[593,779,780],{"class":607}," '",[593,782,784],{"class":783},"sfazB","queryDB",[593,786,787],{"class":607},"'",[593,789,790],{"class":624},") ",[593,792,793],{"class":768},"return",[593,795,621],{"class":607},[593,797,798],{"class":624}," sql",[593,800,628],{"class":607},[593,802,780],{"class":607},[593,804,805],{"class":783},"***",[593,807,787],{"class":607},[593,809,810],{"class":607}," }\n",[593,812,814,817],{"class":595,"line":813},6,[593,815,816],{"class":768},"      return",[593,818,819],{"class":603}," input\n",[593,821,823],{"class":595,"line":822},7,[593,824,825],{"class":607},"    },\n",[593,827,829],{"class":595,"line":828},8,[593,830,831],{"class":607},"  },\n",[593,833,835,838],{"class":595,"line":834},9,[593,836,837],{"class":607},"}",[593,839,638],{"class":603},[478,841,842,853],{},[481,843,844],{},[484,845,846,849,851],{},[487,847,848],{},"Sub-option",[487,850,492],{},[487,852,498],{},[500,854,855,873],{},[484,856,857,861,866],{},[505,858,859],{},[473,860,572],{},[505,862,863],{},[473,864,865],{},"number",[505,867,868,869,872],{},"Truncate stringified inputs exceeding this character length (appends ",[473,870,871],{},"…",").",[484,874,875,879,884],{},[505,876,877],{},[473,878,576],{},[505,880,881],{},[473,882,883],{},"(input, toolName) => unknown",[505,885,886,887,889],{},"Custom transform applied before ",[473,888,572],{},". Use to redact fields or reshape data.",[470,891,892,893,895,896,898,899,902],{},"When ",[473,894,509],{}," is enabled, ",[473,897,557],{}," becomes an ",[473,900,901],{},"Array\u003C{ name, input }>"," instead of a plain string array.",[548,904,906],{"id":905},"cost-estimation","Cost Estimation",[470,908,909,910,912,913,916],{},"Pass a ",[473,911,529],{}," map to compute estimated dollar cost per call. The middleware multiplies token usage by the per-million rates and sets ",[473,914,915],{},"ai.estimatedCost"," on the wide event.",[584,918,920],{"className":586,"code":919,"language":588,"meta":589,"style":589},"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",[473,921,922,938,947,982,1013,1017],{"__ignoreMap":589},[593,923,924,926,928,930,932,934,936],{"class":595,"line":596},[593,925,600],{"class":599},[593,927,604],{"class":603},[593,929,608],{"class":607},[593,931,612],{"class":611},[593,933,615],{"class":603},[593,935,618],{"class":607},[593,937,710],{"class":607},[593,939,940,943,945],{"class":595,"line":713},[593,941,942],{"class":624},"  cost",[593,944,628],{"class":607},[593,946,710],{"class":607},[593,948,949,952,955,957,959,961,964,966,969,971,974,976,979],{"class":595,"line":723},[593,950,951],{"class":607},"    '",[593,953,954],{"class":624},"claude-sonnet-4.6",[593,956,787],{"class":607},[593,958,628],{"class":607},[593,960,621],{"class":607},[593,962,963],{"class":624}," input",[593,965,628],{"class":607},[593,967,968],{"class":677}," 3",[593,970,618],{"class":607},[593,972,973],{"class":624}," output",[593,975,628],{"class":607},[593,977,978],{"class":677}," 15",[593,980,981],{"class":607}," },\n",[593,983,984,986,989,991,993,995,997,999,1002,1004,1006,1008,1011],{"class":595,"line":737},[593,985,951],{"class":607},[593,987,988],{"class":624},"gpt-4o",[593,990,787],{"class":607},[593,992,628],{"class":607},[593,994,621],{"class":607},[593,996,963],{"class":624},[593,998,628],{"class":607},[593,1000,1001],{"class":677}," 2.5",[593,1003,618],{"class":607},[593,1005,973],{"class":624},[593,1007,628],{"class":607},[593,1009,1010],{"class":677}," 10",[593,1012,981],{"class":607},[593,1014,1015],{"class":595,"line":765},[593,1016,831],{"class":607},[593,1018,1019,1021],{"class":595,"line":813},[593,1020,837],{"class":607},[593,1022,638],{"class":603},[470,1024,1025,1026,1032],{},"Read the result from your handler with ",[1027,1028,1029],"a",{"href":280},[473,1030,1031],{},"ai.getEstimatedCost()"," — useful for billing dashboards or warning users before expensive calls.",[1034,1035,1036,1037,1039],"tip",{},"Keep your ",[473,1038,529],{}," map in one file alongside model selection so renaming a model in production also updates pricing. Avoid hardcoding per-route maps.",[548,1041,1043],{"id":1042},"error-handling","Error Handling",[470,1045,1046],{},"If a model call fails, the middleware captures the error into the wide event before re-throwing:",[584,1048,1053],{"className":1049,"code":1050,"filename":1051,"language":1052,"meta":589,"style":589},"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",[473,1054,1055,1060,1075,1093,1113,1133,1153,1171,1176],{"__ignoreMap":589},[593,1056,1057],{"class":595,"line":596},[593,1058,1059],{"class":607},"{\n",[593,1061,1062,1065,1068,1071,1073],{"class":595,"line":713},[593,1063,1064],{"class":607},"  \"",[593,1066,1067],{"class":599},"ai",[593,1069,1070],{"class":607},"\"",[593,1072,628],{"class":607},[593,1074,710],{"class":607},[593,1076,1077,1080,1084,1086,1088,1091],{"class":595,"line":723},[593,1078,1079],{"class":607},"    \"",[593,1081,1083],{"class":1082},"sBMFI","calls",[593,1085,1070],{"class":607},[593,1087,628],{"class":607},[593,1089,1090],{"class":677}," 1",[593,1092,734],{"class":607},[593,1094,1095,1097,1100,1102,1104,1107,1109,1111],{"class":595,"line":737},[593,1096,1079],{"class":607},[593,1098,1099],{"class":1082},"model",[593,1101,1070],{"class":607},[593,1103,628],{"class":607},[593,1105,1106],{"class":607}," \"",[593,1108,954],{"class":783},[593,1110,1070],{"class":607},[593,1112,734],{"class":607},[593,1114,1115,1117,1120,1122,1124,1126,1129,1131],{"class":595,"line":765},[593,1116,1079],{"class":607},[593,1118,1119],{"class":1082},"provider",[593,1121,1070],{"class":607},[593,1123,628],{"class":607},[593,1125,1106],{"class":607},[593,1127,1128],{"class":783},"anthropic",[593,1130,1070],{"class":607},[593,1132,734],{"class":607},[593,1134,1135,1137,1140,1142,1144,1146,1149,1151],{"class":595,"line":813},[593,1136,1079],{"class":607},[593,1138,1139],{"class":1082},"finishReason",[593,1141,1070],{"class":607},[593,1143,628],{"class":607},[593,1145,1106],{"class":607},[593,1147,1148],{"class":783},"error",[593,1150,1070],{"class":607},[593,1152,734],{"class":607},[593,1154,1155,1157,1159,1161,1163,1165,1168],{"class":595,"line":822},[593,1156,1079],{"class":607},[593,1158,1148],{"class":1082},[593,1160,1070],{"class":607},[593,1162,628],{"class":607},[593,1164,1106],{"class":607},[593,1166,1167],{"class":783},"API rate limit exceeded",[593,1169,1170],{"class":607},"\"\n",[593,1172,1173],{"class":595,"line":828},[593,1174,1175],{"class":607},"  }\n",[593,1177,1178],{"class":595,"line":834},[593,1179,1180],{"class":607},"}\n",[470,1182,1183,1184,1187],{},"Stream errors (e.g. content filter) are also captured from the stream's error chunks. Your error-handling code (",[473,1185,1186],{},"try\u002Fcatch",", route-level error handlers) keeps working as usual — the middleware only observes.",[1189,1190,1191],"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":589,"searchDepth":713,"depth":713,"links":1193},[1194,1199,1200],{"id":550,"depth":713,"text":551,"children":1195},[1196,1197,1198],{"id":581,"depth":723,"text":582},{"id":641,"depth":723,"text":642},{"id":687,"depth":723,"text":688},{"id":905,"depth":713,"text":906},{"id":1042,"depth":713,"text":1043},"Configure tool input capture (with redaction and truncation), enable cost estimation per model, and handle errors during AI calls.","md",[1204,1207],{"label":36,"icon":39,"to":266,"color":1205,"variant":1206},"neutral","subtle",{"label":1208,"icon":272,"to":270,"color":1205,"variant":1206},"Usage Patterns",{},{"title":274,"icon":277},{"title":274,"description":1201},"xoxicNRn-mxuaHTHGhoZYwtQS8UV5jdv8PnqlqWAgjc",[1214,1216],{"title":269,"path":270,"stem":271,"description":1215,"icon":272,"children":-1},"streamText, generateText, multi-step agents, RAG, and multiple models — every common AI SDK pattern wired into evlog.",{"title":279,"path":280,"stem":281,"description":1217,"icon":282,"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.",1784204018473]