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Use ",[529,627,628],{},"maxLength"," and ",[529,631,632],{},"transform"," rather than enabling raw capture in production.",[635,636,638],"h3",{"id":637},"capture-everything","Capture everything",[640,641,646],"pre",{"className":642,"code":643,"language":644,"meta":645,"style":645},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const ai = createAILogger(log, { toolInputs: true })\n","typescript","",[529,647,648],{"__ignoreMap":645},[649,650,653,657,661,665,669,672,675,678,682,685,689,692],"span",{"class":651,"line":652},"line",1,[649,654,656],{"class":655},"spNyl","const",[649,658,660],{"class":659},"sTEyZ"," ai ",[649,662,664],{"class":663},"sMK4o","=",[649,666,668],{"class":667},"s2Zo4"," createAILogger",[649,670,671],{"class":659},"(log",[649,673,674],{"class":663},",",[649,676,677],{"class":663}," {",[649,679,681],{"class":680},"swJcz"," toolInputs",[649,683,684],{"class":663},":",[649,686,688],{"class":687},"sfNiH"," true",[649,690,691],{"class":663}," }",[649,693,694],{"class":659},")\n",[635,696,698],{"id":697},"truncate-long-inputs","Truncate long inputs",[640,700,702],{"className":642,"code":701,"language":644,"meta":645,"style":645},"const ai = createAILogger(log, { toolInputs: { maxLength: 200 } })\n",[529,703,704],{"__ignoreMap":645},[649,705,706,708,710,712,714,716,718,720,722,724,726,729,731,735,737,739],{"class":651,"line":652},[649,707,656],{"class":655},[649,709,660],{"class":659},[649,711,664],{"class":663},[649,713,668],{"class":667},[649,715,671],{"class":659},[649,717,674],{"class":663},[649,719,677],{"class":663},[649,721,681],{"class":680},[649,723,684],{"class":663},[649,725,677],{"class":663},[649,727,728],{"class":680}," maxLength",[649,730,684],{"class":663},[649,732,734],{"class":733},"sbssI"," 200",[649,736,691],{"class":663},[649,738,691],{"class":663},[649,740,694],{"class":659},[635,742,744],{"id":743},"redact-sensitive-fields","Redact sensitive fields",[640,746,748],{"className":642,"code":747,"language":644,"meta":645,"style":645},"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",[529,749,750,767,777,791,819,867,876,882,888],{"__ignoreMap":645},[649,751,752,754,756,758,760,762,764],{"class":651,"line":652},[649,753,656],{"class":655},[649,755,660],{"class":659},[649,757,664],{"class":663},[649,759,668],{"class":667},[649,761,671],{"class":659},[649,763,674],{"class":663},[649,765,766],{"class":663}," {\n",[649,768,770,773,775],{"class":651,"line":769},2,[649,771,772],{"class":680},"  toolInputs",[649,774,684],{"class":663},[649,776,766],{"class":663},[649,778,780,783,785,788],{"class":651,"line":779},3,[649,781,782],{"class":680},"    maxLength",[649,784,684],{"class":663},[649,786,787],{"class":733}," 500",[649,789,790],{"class":663},",\n",[649,792,794,797,799,802,806,808,811,814,817],{"class":651,"line":793},4,[649,795,796],{"class":667},"    transform",[649,798,684],{"class":663},[649,800,801],{"class":663}," (",[649,803,805],{"class":804},"sHdIc","input",[649,807,674],{"class":663},[649,809,810],{"class":804}," toolName",[649,812,813],{"class":663},")",[649,815,816],{"class":655}," =>",[649,818,766],{"class":663},[649,820,822,826,828,831,834,837,841,844,847,850,852,855,857,859,862,864],{"class":651,"line":821},5,[649,823,825],{"class":824},"s7zQu","      if",[649,827,801],{"class":680},[649,829,830],{"class":659},"toolName",[649,832,833],{"class":663}," ===",[649,835,836],{"class":663}," '",[649,838,840],{"class":839},"sfazB","queryDB",[649,842,843],{"class":663},"'",[649,845,846],{"class":680},") ",[649,848,849],{"class":824},"return",[649,851,677],{"class":663},[649,853,854],{"class":680}," sql",[649,856,684],{"class":663},[649,858,836],{"class":663},[649,860,861],{"class":839},"***",[649,863,843],{"class":663},[649,865,866],{"class":663}," }\n",[649,868,870,873],{"class":651,"line":869},6,[649,871,872],{"class":824},"      return",[649,874,875],{"class":659}," input\n",[649,877,879],{"class":651,"line":878},7,[649,880,881],{"class":663},"    },\n",[649,883,885],{"class":651,"line":884},8,[649,886,887],{"class":663},"  },\n",[649,889,891,894],{"class":651,"line":890},9,[649,892,893],{"class":663},"}",[649,895,694],{"class":659},[534,897,898,909],{},[537,899,900],{},[540,901,902,905,907],{},[543,903,904],{},"Sub-option",[543,906,548],{},[543,908,554],{},[556,910,911,929],{},[540,912,913,917,922],{},[561,914,915],{},[529,916,628],{},[561,918,919],{},[529,920,921],{},"number",[561,923,924,925,928],{},"Truncate stringified inputs exceeding this character length (appends ",[529,926,927],{},"…",").",[540,930,931,935,940],{},[561,932,933],{},[529,934,632],{},[561,936,937],{},[529,938,939],{},"(input, toolName) => unknown",[561,941,942,943,945],{},"Custom transform applied before ",[529,944,628],{},". Use to redact fields or reshape data.",[526,947,948,949,951,952,954,955,958],{},"When ",[529,950,565],{}," is enabled, ",[529,953,613],{}," becomes an ",[529,956,957],{},"Array\u003C{ name, input }>"," instead of a plain string array.",[604,960,962],{"id":961},"cost-estimation","Cost Estimation",[526,964,965,966,968,969,972],{},"Pass a ",[529,967,585],{}," map to compute estimated dollar cost per call. The middleware multiplies token usage by the per-million rates and sets ",[529,970,971],{},"ai.estimatedCost"," on the wide event.",[640,974,976],{"className":642,"code":975,"language":644,"meta":645,"style":645},"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",[529,977,978,994,1003,1038,1069,1073],{"__ignoreMap":645},[649,979,980,982,984,986,988,990,992],{"class":651,"line":652},[649,981,656],{"class":655},[649,983,660],{"class":659},[649,985,664],{"class":663},[649,987,668],{"class":667},[649,989,671],{"class":659},[649,991,674],{"class":663},[649,993,766],{"class":663},[649,995,996,999,1001],{"class":651,"line":769},[649,997,998],{"class":680},"  cost",[649,1000,684],{"class":663},[649,1002,766],{"class":663},[649,1004,1005,1008,1011,1013,1015,1017,1020,1022,1025,1027,1030,1032,1035],{"class":651,"line":779},[649,1006,1007],{"class":663},"    '",[649,1009,1010],{"class":680},"claude-sonnet-4.6",[649,1012,843],{"class":663},[649,1014,684],{"class":663},[649,1016,677],{"class":663},[649,1018,1019],{"class":680}," input",[649,1021,684],{"class":663},[649,1023,1024],{"class":733}," 3",[649,1026,674],{"class":663},[649,1028,1029],{"class":680}," output",[649,1031,684],{"class":663},[649,1033,1034],{"class":733}," 15",[649,1036,1037],{"class":663}," },\n",[649,1039,1040,1042,1045,1047,1049,1051,1053,1055,1058,1060,1062,1064,1067],{"class":651,"line":793},[649,1041,1007],{"class":663},[649,1043,1044],{"class":680},"gpt-4o",[649,1046,843],{"class":663},[649,1048,684],{"class":663},[649,1050,677],{"class":663},[649,1052,1019],{"class":680},[649,1054,684],{"class":663},[649,1056,1057],{"class":733}," 2.5",[649,1059,674],{"class":663},[649,1061,1029],{"class":680},[649,1063,684],{"class":663},[649,1065,1066],{"class":733}," 10",[649,1068,1037],{"class":663},[649,1070,1071],{"class":651,"line":821},[649,1072,887],{"class":663},[649,1074,1075,1077],{"class":651,"line":869},[649,1076,893],{"class":663},[649,1078,694],{"class":659},[526,1080,1081,1082,1088],{},"Read the result from your handler with ",[1083,1084,1085],"a",{"href":337},[529,1086,1087],{},"ai.getEstimatedCost()"," — useful for billing dashboards or warning users before expensive calls.",[1090,1091,1092,1093,1095],"tip",{},"Keep your ",[529,1094,585],{}," map in one file alongside model selection so renaming a model in production also updates pricing. Avoid hardcoding per-route maps.",[604,1097,1099],{"id":1098},"error-handling","Error Handling",[526,1101,1102],{},"If a model call fails, the middleware captures the error into the wide event before re-throwing:",[640,1104,1109],{"className":1105,"code":1106,"filename":1107,"language":1108,"meta":645,"style":645},"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",[529,1110,1111,1116,1131,1149,1169,1189,1209,1227,1232],{"__ignoreMap":645},[649,1112,1113],{"class":651,"line":652},[649,1114,1115],{"class":663},"{\n",[649,1117,1118,1121,1124,1127,1129],{"class":651,"line":769},[649,1119,1120],{"class":663},"  \"",[649,1122,1123],{"class":655},"ai",[649,1125,1126],{"class":663},"\"",[649,1128,684],{"class":663},[649,1130,766],{"class":663},[649,1132,1133,1136,1140,1142,1144,1147],{"class":651,"line":779},[649,1134,1135],{"class":663},"    \"",[649,1137,1139],{"class":1138},"sBMFI","calls",[649,1141,1126],{"class":663},[649,1143,684],{"class":663},[649,1145,1146],{"class":733}," 1",[649,1148,790],{"class":663},[649,1150,1151,1153,1156,1158,1160,1163,1165,1167],{"class":651,"line":793},[649,1152,1135],{"class":663},[649,1154,1155],{"class":1138},"model",[649,1157,1126],{"class":663},[649,1159,684],{"class":663},[649,1161,1162],{"class":663}," \"",[649,1164,1010],{"class":839},[649,1166,1126],{"class":663},[649,1168,790],{"class":663},[649,1170,1171,1173,1176,1178,1180,1182,1185,1187],{"class":651,"line":821},[649,1172,1135],{"class":663},[649,1174,1175],{"class":1138},"provider",[649,1177,1126],{"class":663},[649,1179,684],{"class":663},[649,1181,1162],{"class":663},[649,1183,1184],{"class":839},"anthropic",[649,1186,1126],{"class":663},[649,1188,790],{"class":663},[649,1190,1191,1193,1196,1198,1200,1202,1205,1207],{"class":651,"line":869},[649,1192,1135],{"class":663},[649,1194,1195],{"class":1138},"finishReason",[649,1197,1126],{"class":663},[649,1199,684],{"class":663},[649,1201,1162],{"class":663},[649,1203,1204],{"class":839},"error",[649,1206,1126],{"class":663},[649,1208,790],{"class":663},[649,1210,1211,1213,1215,1217,1219,1221,1224],{"class":651,"line":878},[649,1212,1135],{"class":663},[649,1214,1204],{"class":1138},[649,1216,1126],{"class":663},[649,1218,684],{"class":663},[649,1220,1162],{"class":663},[649,1222,1223],{"class":839},"API rate limit exceeded",[649,1225,1226],{"class":663},"\"\n",[649,1228,1229],{"class":651,"line":884},[649,1230,1231],{"class":663},"  }\n",[649,1233,1234],{"class":651,"line":890},[649,1235,1236],{"class":663},"}\n",[526,1238,1239,1240,1243],{},"Stream errors (e.g. content filter) are also captured from the stream's error chunks. Your error-handling code (",[529,1241,1242],{},"try\u002Fcatch",", route-level error handlers) keeps working as usual — the middleware only observes.",[1245,1246,1247],"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":645,"searchDepth":769,"depth":769,"links":1249},[1250,1255,1256],{"id":606,"depth":769,"text":607,"children":1251},[1252,1253,1254],{"id":637,"depth":779,"text":638},{"id":697,"depth":779,"text":698},{"id":743,"depth":779,"text":744},{"id":961,"depth":769,"text":962},{"id":1098,"depth":769,"text":1099},"Configure tool input capture (with redaction and truncation), enable cost estimation per model, and handle errors during AI calls.","md",[1260,1263],{"label":36,"icon":39,"to":323,"color":1261,"variant":1262},"neutral","subtle",{"label":1264,"icon":329,"to":327,"color":1261,"variant":1262},"Usage Patterns",{},{"title":331,"icon":334},{"title":331,"description":1257},"k7Xm9_TcThZFVYxRgR4ikKafIXVxXYfDNbM3H99Fklk",[1270,1272],{"title":326,"path":327,"stem":328,"description":1271,"icon":329,"children":-1},"streamText, generateText, multi-step agents, RAG, and multiple models — every common AI SDK pattern wired into evlog.",{"title":336,"path":337,"stem":338,"description":1273,"icon":339,"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.",1785665723465]