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Keys are model IDs, values are ",[556,627,628],{},"{ input, output }"," in dollars per 1M tokens.",[631,632,634],"h2",{"id":633},"tool-inputs","Tool Inputs",[553,636,637,638,641,642,645,646,648],{},"By default, ",[556,639,640],{},"ai.toolCalls"," is a ",[556,643,644],{},"string[]"," of tool names. Enable ",[556,647,592],{}," to capture inputs too — useful for debugging agent behaviour or auditing what data the model reached for.",[650,651,652,653,656,657,660],"warning",{},"Tool inputs can be large and may contain sensitive data (SQL, API keys, customer PII). Use ",[556,654,655],{},"maxLength"," and ",[556,658,659],{},"transform"," rather than enabling raw capture in production.",[662,663,665],"h3",{"id":664},"capture-everything","Capture everything",[667,668,673],"pre",{"className":669,"code":670,"language":671,"meta":672,"style":672},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","const ai = createAILogger(log, { toolInputs: true })\n","typescript","",[556,674,675],{"__ignoreMap":672},[676,677,680,684,688,692,696,699,702,705,709,712,716,719],"span",{"class":678,"line":679},"line",1,[676,681,683],{"class":682},"spNyl","const",[676,685,687],{"class":686},"sTEyZ"," ai ",[676,689,691],{"class":690},"sMK4o","=",[676,693,695],{"class":694},"s2Zo4"," createAILogger",[676,697,698],{"class":686},"(log",[676,700,701],{"class":690},",",[676,703,704],{"class":690}," {",[676,706,708],{"class":707},"swJcz"," toolInputs",[676,710,711],{"class":690},":",[676,713,715],{"class":714},"sfNiH"," true",[676,717,718],{"class":690}," }",[676,720,721],{"class":686},")\n",[662,723,725],{"id":724},"truncate-long-inputs","Truncate long inputs",[667,727,729],{"className":669,"code":728,"language":671,"meta":672,"style":672},"const ai = createAILogger(log, { toolInputs: { maxLength: 200 } })\n",[556,730,731],{"__ignoreMap":672},[676,732,733,735,737,739,741,743,745,747,749,751,753,756,758,762,764,766],{"class":678,"line":679},[676,734,683],{"class":682},[676,736,687],{"class":686},[676,738,691],{"class":690},[676,740,695],{"class":694},[676,742,698],{"class":686},[676,744,701],{"class":690},[676,746,704],{"class":690},[676,748,708],{"class":707},[676,750,711],{"class":690},[676,752,704],{"class":690},[676,754,755],{"class":707}," maxLength",[676,757,711],{"class":690},[676,759,761],{"class":760},"sbssI"," 200",[676,763,718],{"class":690},[676,765,718],{"class":690},[676,767,721],{"class":686},[662,769,771],{"id":770},"redact-sensitive-fields","Redact sensitive fields",[667,773,775],{"className":669,"code":774,"language":671,"meta":672,"style":672},"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",[556,776,777,794,804,818,846,894,903,909,915],{"__ignoreMap":672},[676,778,779,781,783,785,787,789,791],{"class":678,"line":679},[676,780,683],{"class":682},[676,782,687],{"class":686},[676,784,691],{"class":690},[676,786,695],{"class":694},[676,788,698],{"class":686},[676,790,701],{"class":690},[676,792,793],{"class":690}," {\n",[676,795,797,800,802],{"class":678,"line":796},2,[676,798,799],{"class":707},"  toolInputs",[676,801,711],{"class":690},[676,803,793],{"class":690},[676,805,807,810,812,815],{"class":678,"line":806},3,[676,808,809],{"class":707},"    maxLength",[676,811,711],{"class":690},[676,813,814],{"class":760}," 500",[676,816,817],{"class":690},",\n",[676,819,821,824,826,829,833,835,838,841,844],{"class":678,"line":820},4,[676,822,823],{"class":694},"    transform",[676,825,711],{"class":690},[676,827,828],{"class":690}," (",[676,830,832],{"class":831},"sHdIc","input",[676,834,701],{"class":690},[676,836,837],{"class":831}," toolName",[676,839,840],{"class":690},")",[676,842,843],{"class":682}," =>",[676,845,793],{"class":690},[676,847,849,853,855,858,861,864,868,871,874,877,879,882,884,886,889,891],{"class":678,"line":848},5,[676,850,852],{"class":851},"s7zQu","      if",[676,854,828],{"class":707},[676,856,857],{"class":686},"toolName",[676,859,860],{"class":690}," ===",[676,862,863],{"class":690}," '",[676,865,867],{"class":866},"sfazB","queryDB",[676,869,870],{"class":690},"'",[676,872,873],{"class":707},") ",[676,875,876],{"class":851},"return",[676,878,704],{"class":690},[676,880,881],{"class":707}," sql",[676,883,711],{"class":690},[676,885,863],{"class":690},[676,887,888],{"class":866},"***",[676,890,870],{"class":690},[676,892,893],{"class":690}," }\n",[676,895,897,900],{"class":678,"line":896},6,[676,898,899],{"class":851},"      return",[676,901,902],{"class":686}," input\n",[676,904,906],{"class":678,"line":905},7,[676,907,908],{"class":690},"    },\n",[676,910,912],{"class":678,"line":911},8,[676,913,914],{"class":690},"  },\n",[676,916,918,921],{"class":678,"line":917},9,[676,919,920],{"class":690},"}",[676,922,721],{"class":686},[561,924,925,936],{},[564,926,927],{},[567,928,929,932,934],{},[570,930,931],{},"Sub-option",[570,933,575],{},[570,935,581],{},[583,937,938,956],{},[567,939,940,944,949],{},[588,941,942],{},[556,943,655],{},[588,945,946],{},[556,947,948],{},"number",[588,950,951,952,955],{},"Truncate stringified inputs exceeding this character length (appends ",[556,953,954],{},"…",").",[567,957,958,962,967],{},[588,959,960],{},[556,961,659],{},[588,963,964],{},[556,965,966],{},"(input, toolName) => unknown",[588,968,969,970,972],{},"Custom transform applied before ",[556,971,655],{},". Use to redact fields or reshape data.",[553,974,975,976,978,979,981,982,985],{},"When ",[556,977,592],{}," is enabled, ",[556,980,640],{}," becomes an ",[556,983,984],{},"Array\u003C{ name, input }>"," instead of a plain string array.",[631,987,989],{"id":988},"cost-estimation","Cost Estimation",[553,991,992,993,995,996,999],{},"Pass a ",[556,994,612],{}," map to compute estimated dollar cost per call. The middleware multiplies token usage by the per-million rates and sets ",[556,997,998],{},"ai.estimatedCost"," on the wide event.",[667,1001,1003],{"className":669,"code":1002,"language":671,"meta":672,"style":672},"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",[556,1004,1005,1021,1030,1065,1096,1100],{"__ignoreMap":672},[676,1006,1007,1009,1011,1013,1015,1017,1019],{"class":678,"line":679},[676,1008,683],{"class":682},[676,1010,687],{"class":686},[676,1012,691],{"class":690},[676,1014,695],{"class":694},[676,1016,698],{"class":686},[676,1018,701],{"class":690},[676,1020,793],{"class":690},[676,1022,1023,1026,1028],{"class":678,"line":796},[676,1024,1025],{"class":707},"  cost",[676,1027,711],{"class":690},[676,1029,793],{"class":690},[676,1031,1032,1035,1038,1040,1042,1044,1047,1049,1052,1054,1057,1059,1062],{"class":678,"line":806},[676,1033,1034],{"class":690},"    '",[676,1036,1037],{"class":707},"claude-sonnet-4.6",[676,1039,870],{"class":690},[676,1041,711],{"class":690},[676,1043,704],{"class":690},[676,1045,1046],{"class":707}," input",[676,1048,711],{"class":690},[676,1050,1051],{"class":760}," 3",[676,1053,701],{"class":690},[676,1055,1056],{"class":707}," output",[676,1058,711],{"class":690},[676,1060,1061],{"class":760}," 15",[676,1063,1064],{"class":690}," },\n",[676,1066,1067,1069,1072,1074,1076,1078,1080,1082,1085,1087,1089,1091,1094],{"class":678,"line":820},[676,1068,1034],{"class":690},[676,1070,1071],{"class":707},"gpt-4o",[676,1073,870],{"class":690},[676,1075,711],{"class":690},[676,1077,704],{"class":690},[676,1079,1046],{"class":707},[676,1081,711],{"class":690},[676,1083,1084],{"class":760}," 2.5",[676,1086,701],{"class":690},[676,1088,1056],{"class":707},[676,1090,711],{"class":690},[676,1092,1093],{"class":760}," 10",[676,1095,1064],{"class":690},[676,1097,1098],{"class":678,"line":848},[676,1099,914],{"class":690},[676,1101,1102,1104],{"class":678,"line":896},[676,1103,920],{"class":690},[676,1105,721],{"class":686},[553,1107,1108,1109,1115],{},"Read the result from your handler with ",[1110,1111,1112],"a",{"href":91},[556,1113,1114],{},"ai.getEstimatedCost()"," — useful for billing dashboards or warning users before expensive calls.",[1117,1118,1119,1120,1122],"tip",{},"Keep your ",[556,1121,612],{}," map in one file alongside model selection so renaming a model in production also updates pricing. Avoid hardcoding per-route maps.",[631,1124,1126],{"id":1125},"error-handling","Error Handling",[553,1128,1129],{},"If a model call fails, the middleware captures the error into the wide event before re-throwing:",[667,1131,1136],{"className":1132,"code":1133,"filename":1134,"language":1135,"meta":672,"style":672},"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",[556,1137,1138,1143,1158,1176,1196,1216,1236,1254,1259],{"__ignoreMap":672},[676,1139,1140],{"class":678,"line":679},[676,1141,1142],{"class":690},"{\n",[676,1144,1145,1148,1151,1154,1156],{"class":678,"line":796},[676,1146,1147],{"class":690},"  \"",[676,1149,1150],{"class":682},"ai",[676,1152,1153],{"class":690},"\"",[676,1155,711],{"class":690},[676,1157,793],{"class":690},[676,1159,1160,1163,1167,1169,1171,1174],{"class":678,"line":806},[676,1161,1162],{"class":690},"    \"",[676,1164,1166],{"class":1165},"sBMFI","calls",[676,1168,1153],{"class":690},[676,1170,711],{"class":690},[676,1172,1173],{"class":760}," 1",[676,1175,817],{"class":690},[676,1177,1178,1180,1183,1185,1187,1190,1192,1194],{"class":678,"line":820},[676,1179,1162],{"class":690},[676,1181,1182],{"class":1165},"model",[676,1184,1153],{"class":690},[676,1186,711],{"class":690},[676,1188,1189],{"class":690}," \"",[676,1191,1037],{"class":866},[676,1193,1153],{"class":690},[676,1195,817],{"class":690},[676,1197,1198,1200,1203,1205,1207,1209,1212,1214],{"class":678,"line":848},[676,1199,1162],{"class":690},[676,1201,1202],{"class":1165},"provider",[676,1204,1153],{"class":690},[676,1206,711],{"class":690},[676,1208,1189],{"class":690},[676,1210,1211],{"class":866},"anthropic",[676,1213,1153],{"class":690},[676,1215,817],{"class":690},[676,1217,1218,1220,1223,1225,1227,1229,1232,1234],{"class":678,"line":896},[676,1219,1162],{"class":690},[676,1221,1222],{"class":1165},"finishReason",[676,1224,1153],{"class":690},[676,1226,711],{"class":690},[676,1228,1189],{"class":690},[676,1230,1231],{"class":866},"error",[676,1233,1153],{"class":690},[676,1235,817],{"class":690},[676,1237,1238,1240,1242,1244,1246,1248,1251],{"class":678,"line":905},[676,1239,1162],{"class":690},[676,1241,1231],{"class":1165},[676,1243,1153],{"class":690},[676,1245,711],{"class":690},[676,1247,1189],{"class":690},[676,1249,1250],{"class":866},"API rate limit exceeded",[676,1252,1253],{"class":690},"\"\n",[676,1255,1256],{"class":678,"line":911},[676,1257,1258],{"class":690},"  }\n",[676,1260,1261],{"class":678,"line":917},[676,1262,1263],{"class":690},"}\n",[553,1265,1266,1267,1270],{},"Stream errors (e.g. content filter) are also captured from the stream's error chunks. Your error-handling code (",[556,1268,1269],{},"try\u002Fcatch",", route-level error handlers) keeps working as usual — the middleware only observes.",[1272,1273,1274],"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":672,"searchDepth":796,"depth":796,"links":1276},[1277,1282,1283],{"id":633,"depth":796,"text":634,"children":1278},[1279,1280,1281],{"id":664,"depth":806,"text":665},{"id":724,"depth":806,"text":725},{"id":770,"depth":806,"text":771},{"id":988,"depth":796,"text":989},{"id":1125,"depth":796,"text":1126},"Configure tool input capture (with redaction and truncation), enable cost estimation per model, and handle errors during AI calls.","md",[1287,1290],{"label":41,"icon":44,"to":77,"color":1288,"variant":1289},"neutral","subtle",{"label":1291,"icon":83,"to":81,"color":1288,"variant":1289},"Usage Patterns",{},{"title":85,"icon":88},{"title":85,"description":1284},"wNWYlAoixuzpqUkoMmAWzxK3lYeBu_IxjZhS0DnZOSs",[1297,1299],{"title":80,"path":81,"stem":82,"description":1298,"icon":83,"children":-1},"streamText, generateText, multi-step agents, RAG, and multiple models — every common AI SDK pattern wired into evlog.",{"title":90,"path":91,"stem":92,"description":1300,"icon":93,"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.",1778338246226]