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Use ",[509,607,608],{},"maxLength"," and ",[509,611,612],{},"transform"," rather than enabling raw capture in production.",[615,616,618],"h3",{"id":617},"capture-everything","Capture everything",[620,621,626],"pre",{"className":622,"code":623,"language":624,"meta":625,"style":625},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const ai = createAILogger(log, { toolInputs: true })\n","typescript","",[509,627,628],{"__ignoreMap":625},[629,630,633,637,641,645,649,652,655,658,662,665,669,672],"span",{"class":631,"line":632},"line",1,[629,634,636],{"class":635},"spNyl","const",[629,638,640],{"class":639},"sTEyZ"," ai ",[629,642,644],{"class":643},"sMK4o","=",[629,646,648],{"class":647},"s2Zo4"," createAILogger",[629,650,651],{"class":639},"(log",[629,653,654],{"class":643},",",[629,656,657],{"class":643}," {",[629,659,661],{"class":660},"swJcz"," toolInputs",[629,663,664],{"class":643},":",[629,666,668],{"class":667},"sfNiH"," true",[629,670,671],{"class":643}," }",[629,673,674],{"class":639},")\n",[615,676,678],{"id":677},"truncate-long-inputs","Truncate long inputs",[620,680,682],{"className":622,"code":681,"language":624,"meta":625,"style":625},"const ai = createAILogger(log, { toolInputs: { maxLength: 200 } })\n",[509,683,684],{"__ignoreMap":625},[629,685,686,688,690,692,694,696,698,700,702,704,706,709,711,715,717,719],{"class":631,"line":632},[629,687,636],{"class":635},[629,689,640],{"class":639},[629,691,644],{"class":643},[629,693,648],{"class":647},[629,695,651],{"class":639},[629,697,654],{"class":643},[629,699,657],{"class":643},[629,701,661],{"class":660},[629,703,664],{"class":643},[629,705,657],{"class":643},[629,707,708],{"class":660}," maxLength",[629,710,664],{"class":643},[629,712,714],{"class":713},"sbssI"," 200",[629,716,671],{"class":643},[629,718,671],{"class":643},[629,720,674],{"class":639},[615,722,724],{"id":723},"redact-sensitive-fields","Redact sensitive fields",[620,726,728],{"className":622,"code":727,"language":624,"meta":625,"style":625},"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",[509,729,730,747,757,771,799,847,856,862,868],{"__ignoreMap":625},[629,731,732,734,736,738,740,742,744],{"class":631,"line":632},[629,733,636],{"class":635},[629,735,640],{"class":639},[629,737,644],{"class":643},[629,739,648],{"class":647},[629,741,651],{"class":639},[629,743,654],{"class":643},[629,745,746],{"class":643}," {\n",[629,748,750,753,755],{"class":631,"line":749},2,[629,751,752],{"class":660},"  toolInputs",[629,754,664],{"class":643},[629,756,746],{"class":643},[629,758,760,763,765,768],{"class":631,"line":759},3,[629,761,762],{"class":660},"    maxLength",[629,764,664],{"class":643},[629,766,767],{"class":713}," 500",[629,769,770],{"class":643},",\n",[629,772,774,777,779,782,786,788,791,794,797],{"class":631,"line":773},4,[629,775,776],{"class":647},"    transform",[629,778,664],{"class":643},[629,780,781],{"class":643}," (",[629,783,785],{"class":784},"sHdIc","input",[629,787,654],{"class":643},[629,789,790],{"class":784}," toolName",[629,792,793],{"class":643},")",[629,795,796],{"class":635}," =>",[629,798,746],{"class":643},[629,800,802,806,808,811,814,817,821,824,827,830,832,835,837,839,842,844],{"class":631,"line":801},5,[629,803,805],{"class":804},"s7zQu","      if",[629,807,781],{"class":660},[629,809,810],{"class":639},"toolName",[629,812,813],{"class":643}," ===",[629,815,816],{"class":643}," '",[629,818,820],{"class":819},"sfazB","queryDB",[629,822,823],{"class":643},"'",[629,825,826],{"class":660},") ",[629,828,829],{"class":804},"return",[629,831,657],{"class":643},[629,833,834],{"class":660}," sql",[629,836,664],{"class":643},[629,838,816],{"class":643},[629,840,841],{"class":819},"***",[629,843,823],{"class":643},[629,845,846],{"class":643}," }\n",[629,848,850,853],{"class":631,"line":849},6,[629,851,852],{"class":804},"      return",[629,854,855],{"class":639}," input\n",[629,857,859],{"class":631,"line":858},7,[629,860,861],{"class":643},"    },\n",[629,863,865],{"class":631,"line":864},8,[629,866,867],{"class":643},"  },\n",[629,869,871,874],{"class":631,"line":870},9,[629,872,873],{"class":643},"}",[629,875,674],{"class":639},[514,877,878,889],{},[517,879,880],{},[520,881,882,885,887],{},[523,883,884],{},"Sub-option",[523,886,528],{},[523,888,534],{},[536,890,891,909],{},[520,892,893,897,902],{},[541,894,895],{},[509,896,608],{},[541,898,899],{},[509,900,901],{},"number",[541,903,904,905,908],{},"Truncate stringified inputs exceeding this character length (appends ",[509,906,907],{},"…",").",[520,910,911,915,920],{},[541,912,913],{},[509,914,612],{},[541,916,917],{},[509,918,919],{},"(input, toolName) => unknown",[541,921,922,923,925],{},"Custom transform applied before ",[509,924,608],{},". Use to redact fields or reshape data.",[506,927,928,929,931,932,934,935,938],{},"When ",[509,930,545],{}," is enabled, ",[509,933,593],{}," becomes an ",[509,936,937],{},"Array\u003C{ name, input }>"," instead of a plain string array.",[584,940,942],{"id":941},"cost-estimation","Cost Estimation",[506,944,945,946,948,949,952],{},"Pass a ",[509,947,565],{}," map to compute estimated dollar cost per call. The middleware multiplies token usage by the per-million rates and sets ",[509,950,951],{},"ai.estimatedCost"," on the wide event.",[620,954,956],{"className":622,"code":955,"language":624,"meta":625,"style":625},"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",[509,957,958,974,983,1018,1049,1053],{"__ignoreMap":625},[629,959,960,962,964,966,968,970,972],{"class":631,"line":632},[629,961,636],{"class":635},[629,963,640],{"class":639},[629,965,644],{"class":643},[629,967,648],{"class":647},[629,969,651],{"class":639},[629,971,654],{"class":643},[629,973,746],{"class":643},[629,975,976,979,981],{"class":631,"line":749},[629,977,978],{"class":660},"  cost",[629,980,664],{"class":643},[629,982,746],{"class":643},[629,984,985,988,991,993,995,997,1000,1002,1005,1007,1010,1012,1015],{"class":631,"line":759},[629,986,987],{"class":643},"    '",[629,989,990],{"class":660},"claude-sonnet-4.6",[629,992,823],{"class":643},[629,994,664],{"class":643},[629,996,657],{"class":643},[629,998,999],{"class":660}," input",[629,1001,664],{"class":643},[629,1003,1004],{"class":713}," 3",[629,1006,654],{"class":643},[629,1008,1009],{"class":660}," output",[629,1011,664],{"class":643},[629,1013,1014],{"class":713}," 15",[629,1016,1017],{"class":643}," },\n",[629,1019,1020,1022,1025,1027,1029,1031,1033,1035,1038,1040,1042,1044,1047],{"class":631,"line":773},[629,1021,987],{"class":643},[629,1023,1024],{"class":660},"gpt-4o",[629,1026,823],{"class":643},[629,1028,664],{"class":643},[629,1030,657],{"class":643},[629,1032,999],{"class":660},[629,1034,664],{"class":643},[629,1036,1037],{"class":713}," 2.5",[629,1039,654],{"class":643},[629,1041,1009],{"class":660},[629,1043,664],{"class":643},[629,1045,1046],{"class":713}," 10",[629,1048,1017],{"class":643},[629,1050,1051],{"class":631,"line":801},[629,1052,867],{"class":643},[629,1054,1055,1057],{"class":631,"line":849},[629,1056,873],{"class":643},[629,1058,674],{"class":639},[506,1060,1061,1062,1068],{},"Read the result from your handler with ",[1063,1064,1065],"a",{"href":317},[509,1066,1067],{},"ai.getEstimatedCost()"," — useful for billing dashboards or warning users before expensive calls.",[1070,1071,1072,1073,1075],"tip",{},"Keep your ",[509,1074,565],{}," map in one file alongside model selection so renaming a model in production also updates pricing. Avoid hardcoding per-route maps.",[584,1077,1079],{"id":1078},"error-handling","Error Handling",[506,1081,1082],{},"If a model call fails, the middleware captures the error into the wide event before re-throwing:",[620,1084,1089],{"className":1085,"code":1086,"filename":1087,"language":1088,"meta":625,"style":625},"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",[509,1090,1091,1096,1111,1129,1149,1169,1189,1207,1212],{"__ignoreMap":625},[629,1092,1093],{"class":631,"line":632},[629,1094,1095],{"class":643},"{\n",[629,1097,1098,1101,1104,1107,1109],{"class":631,"line":749},[629,1099,1100],{"class":643},"  \"",[629,1102,1103],{"class":635},"ai",[629,1105,1106],{"class":643},"\"",[629,1108,664],{"class":643},[629,1110,746],{"class":643},[629,1112,1113,1116,1120,1122,1124,1127],{"class":631,"line":759},[629,1114,1115],{"class":643},"    \"",[629,1117,1119],{"class":1118},"sBMFI","calls",[629,1121,1106],{"class":643},[629,1123,664],{"class":643},[629,1125,1126],{"class":713}," 1",[629,1128,770],{"class":643},[629,1130,1131,1133,1136,1138,1140,1143,1145,1147],{"class":631,"line":773},[629,1132,1115],{"class":643},[629,1134,1135],{"class":1118},"model",[629,1137,1106],{"class":643},[629,1139,664],{"class":643},[629,1141,1142],{"class":643}," \"",[629,1144,990],{"class":819},[629,1146,1106],{"class":643},[629,1148,770],{"class":643},[629,1150,1151,1153,1156,1158,1160,1162,1165,1167],{"class":631,"line":801},[629,1152,1115],{"class":643},[629,1154,1155],{"class":1118},"provider",[629,1157,1106],{"class":643},[629,1159,664],{"class":643},[629,1161,1142],{"class":643},[629,1163,1164],{"class":819},"anthropic",[629,1166,1106],{"class":643},[629,1168,770],{"class":643},[629,1170,1171,1173,1176,1178,1180,1182,1185,1187],{"class":631,"line":849},[629,1172,1115],{"class":643},[629,1174,1175],{"class":1118},"finishReason",[629,1177,1106],{"class":643},[629,1179,664],{"class":643},[629,1181,1142],{"class":643},[629,1183,1184],{"class":819},"error",[629,1186,1106],{"class":643},[629,1188,770],{"class":643},[629,1190,1191,1193,1195,1197,1199,1201,1204],{"class":631,"line":858},[629,1192,1115],{"class":643},[629,1194,1184],{"class":1118},[629,1196,1106],{"class":643},[629,1198,664],{"class":643},[629,1200,1142],{"class":643},[629,1202,1203],{"class":819},"API rate limit exceeded",[629,1205,1206],{"class":643},"\"\n",[629,1208,1209],{"class":631,"line":864},[629,1210,1211],{"class":643},"  }\n",[629,1213,1214],{"class":631,"line":870},[629,1215,1216],{"class":643},"}\n",[506,1218,1219,1220,1223],{},"Stream errors (e.g. content filter) are also captured from the stream's error chunks. Your error-handling code (",[509,1221,1222],{},"try\u002Fcatch",", route-level error handlers) keeps working as usual — the middleware only observes.",[1225,1226,1227],"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":625,"searchDepth":749,"depth":749,"links":1229},[1230,1235,1236],{"id":586,"depth":749,"text":587,"children":1231},[1232,1233,1234],{"id":617,"depth":759,"text":618},{"id":677,"depth":759,"text":678},{"id":723,"depth":759,"text":724},{"id":941,"depth":749,"text":942},{"id":1078,"depth":749,"text":1079},"Configure tool input capture (with redaction and truncation), enable cost estimation per model, and handle errors during AI calls.","md",[1240,1243],{"label":36,"icon":39,"to":303,"color":1241,"variant":1242},"neutral","subtle",{"label":1244,"icon":309,"to":307,"color":1241,"variant":1242},"Usage Patterns",{},{"title":311,"icon":314},{"title":311,"description":1237},"k7Xm9_TcThZFVYxRgR4ikKafIXVxXYfDNbM3H99Fklk",[1250,1252],{"title":306,"path":307,"stem":308,"description":1251,"icon":309,"children":-1},"streamText, generateText, multi-step agents, RAG, and multiple models — every common AI SDK pattern wired into evlog.",{"title":316,"path":317,"stem":318,"description":1253,"icon":319,"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.",1785016742958]