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Add the hook",[454,692,693,694,697],{},"Create ",[473,695,696],{},"agent\u002Fhooks\u002Fevlog.ts",":",[611,699,703],{"className":700,"code":701,"filename":696,"language":702,"meta":617,"style":617},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { defineEvlogHook } from 'evlog\u002Feve'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\n\nexport default defineEvlogHook({\n  init: { env: { service: 'my-agent' } },\n  drain: createAxiomDrain(),\n  enrich: (ctx) => {\n    ctx.event.region = process.env.VERCEL_REGION\n  },\n})\n","typescript",[473,704,705,733,754,761,779,815,831,856,889,895],{"__ignoreMap":617},[621,706,707,711,715,719,722,725,728,730],{"class":623,"line":624},[621,708,710],{"class":709},"s7zQu","import",[621,712,714],{"class":713},"sMK4o"," {",[621,716,718],{"class":717},"sTEyZ"," defineEvlogHook",[621,720,721],{"class":713}," }",[621,723,724],{"class":709}," from",[621,726,727],{"class":713}," '",[621,729,479],{"class":630},[621,731,732],{"class":713},"'\n",[621,734,736,738,740,743,745,747,749,752],{"class":623,"line":735},2,[621,737,710],{"class":709},[621,739,714],{"class":713},[621,741,742],{"class":717}," createAxiomDrain",[621,744,721],{"class":713},[621,746,724],{"class":709},[621,748,727],{"class":713},[621,750,751],{"class":630},"evlog\u002Faxiom",[621,753,732],{"class":713},[621,755,757],{"class":623,"line":756},3,[621,758,760],{"emptyLinePlaceholder":759},true,"\n",[621,762,764,767,770,773,776],{"class":623,"line":763},4,[621,765,766],{"class":709},"export",[621,768,769],{"class":709}," default",[621,771,718],{"class":772},"s2Zo4",[621,774,775],{"class":717},"(",[621,777,778],{"class":713},"{\n",[621,780,782,786,788,790,793,795,797,800,802,804,807,810,812],{"class":623,"line":781},5,[621,783,785],{"class":784},"swJcz","  init",[621,787,697],{"class":713},[621,789,714],{"class":713},[621,791,792],{"class":784}," env",[621,794,697],{"class":713},[621,796,714],{"class":713},[621,798,799],{"class":784}," service",[621,801,697],{"class":713},[621,803,727],{"class":713},[621,805,806],{"class":630},"my-agent",[621,808,809],{"class":713},"'",[621,811,721],{"class":713},[621,813,814],{"class":713}," },\n",[621,816,818,821,823,825,828],{"class":623,"line":817},6,[621,819,820],{"class":784},"  drain",[621,822,697],{"class":713},[621,824,742],{"class":772},[621,826,827],{"class":717},"()",[621,829,830],{"class":713},",\n",[621,832,834,837,839,842,846,849,853],{"class":623,"line":833},7,[621,835,836],{"class":772},"  enrich",[621,838,697],{"class":713},[621,840,841],{"class":713}," (",[621,843,845],{"class":844},"sHdIc","ctx",[621,847,848],{"class":713},")",[621,850,852],{"class":851},"spNyl"," =>",[621,854,855],{"class":713}," {\n",[621,857,859,862,865,868,870,873,876,879,881,884,886],{"class":623,"line":858},8,[621,860,861],{"class":717},"    ctx",[621,863,864],{"class":713},".",[621,866,867],{"class":717},"event",[621,869,864],{"class":713},[621,871,872],{"class":717},"region",[621,874,875],{"class":713}," =",[621,877,878],{"class":717}," process",[621,880,864],{"class":713},[621,882,883],{"class":717},"env",[621,885,864],{"class":713},[621,887,888],{"class":717},"VERCEL_REGION\n",[621,890,892],{"class":623,"line":891},9,[621,893,894],{"class":713},"  },\n",[621,896,898,901],{"class":623,"line":897},10,[621,899,900],{"class":713},"}",[621,902,903],{"class":717},")\n",[454,905,906,907,910,911,914],{},"Eve auto-discovers hook files under ",[473,908,909],{},"agent\u002Fhooks\u002F",". No HTTP middleware — the unit of work is an agent ",[464,912,913],{},"turn",", not a request.",[603,916,918],{"id":917},"_3-log-business-context-from-tools","3. Log business context from tools",[454,920,921,922,927],{},"In the ",[457,923,926],{"href":924,"rel":925},"https:\u002F\u002Fgithub.com\u002FHugoRCD\u002Fevlog\u002Ftree\u002Fmain\u002Fexamples\u002Feve",[461],"example agent",", support tools attach customer and order context as the agent works a refund:",[611,929,932],{"className":700,"code":930,"filename":931,"language":702,"meta":617,"style":617},"import { defineTool } from 'eve\u002Ftools'\nimport { useTurnLogger } from 'evlog\u002Feve'\nimport { z } from 'zod'\n\nexport default defineTool({\n  description: 'Look up an order by id.',\n  inputSchema: z.object({ orderId: z.string() }),\n  async execute({ orderId }, ctx) {\n    const order = await fetchOrder(orderId)\n    const log = useTurnLogger(ctx)\n    log.set({ order: { id: order.id, amount: order.amount, status: order.status } })\n    return order\n  },\n})\n","agent\u002Ftools\u002Flookup_order.ts",[473,933,934,954,973,993,997,1009,1025,1065,1088,1111,1128,1196,1205,1210],{"__ignoreMap":617},[621,935,936,938,940,943,945,947,949,952],{"class":623,"line":624},[621,937,710],{"class":709},[621,939,714],{"class":713},[621,941,942],{"class":717}," defineTool",[621,944,721],{"class":713},[621,946,724],{"class":709},[621,948,727],{"class":713},[621,950,951],{"class":630},"eve\u002Ftools",[621,953,732],{"class":713},[621,955,956,958,960,963,965,967,969,971],{"class":623,"line":735},[621,957,710],{"class":709},[621,959,714],{"class":713},[621,961,962],{"class":717}," useTurnLogger",[621,964,721],{"class":713},[621,966,724],{"class":709},[621,968,727],{"class":713},[621,970,479],{"class":630},[621,972,732],{"class":713},[621,974,975,977,979,982,984,986,988,991],{"class":623,"line":756},[621,976,710],{"class":709},[621,978,714],{"class":713},[621,980,981],{"class":717}," z",[621,983,721],{"class":713},[621,985,724],{"class":709},[621,987,727],{"class":713},[621,989,990],{"class":630},"zod",[621,992,732],{"class":713},[621,994,995],{"class":623,"line":763},[621,996,760],{"emptyLinePlaceholder":759},[621,998,999,1001,1003,1005,1007],{"class":623,"line":781},[621,1000,766],{"class":709},[621,1002,769],{"class":709},[621,1004,942],{"class":772},[621,1006,775],{"class":717},[621,1008,778],{"class":713},[621,1010,1011,1014,1016,1018,1021,1023],{"class":623,"line":817},[621,1012,1013],{"class":784},"  description",[621,1015,697],{"class":713},[621,1017,727],{"class":713},[621,1019,1020],{"class":630},"Look up an order by id.",[621,1022,809],{"class":713},[621,1024,830],{"class":713},[621,1026,1027,1030,1032,1034,1036,1039,1041,1044,1047,1049,1051,1053,1056,1059,1061,1063],{"class":623,"line":833},[621,1028,1029],{"class":784},"  inputSchema",[621,1031,697],{"class":713},[621,1033,981],{"class":717},[621,1035,864],{"class":713},[621,1037,1038],{"class":772},"object",[621,1040,775],{"class":717},[621,1042,1043],{"class":713},"{",[621,1045,1046],{"class":784}," orderId",[621,1048,697],{"class":713},[621,1050,981],{"class":717},[621,1052,864],{"class":713},[621,1054,1055],{"class":772},"string",[621,1057,1058],{"class":717},"() ",[621,1060,900],{"class":713},[621,1062,848],{"class":717},[621,1064,830],{"class":713},[621,1066,1067,1070,1073,1076,1078,1081,1084,1086],{"class":623,"line":858},[621,1068,1069],{"class":851},"  async",[621,1071,1072],{"class":784}," execute",[621,1074,1075],{"class":713},"({",[621,1077,1046],{"class":844},[621,1079,1080],{"class":713}," },",[621,1082,1083],{"class":844}," ctx",[621,1085,848],{"class":713},[621,1087,855],{"class":713},[621,1089,1090,1093,1096,1098,1101,1104,1106,1109],{"class":623,"line":891},[621,1091,1092],{"class":851},"    const",[621,1094,1095],{"class":717}," order",[621,1097,875],{"class":713},[621,1099,1100],{"class":709}," await",[621,1102,1103],{"class":772}," fetchOrder",[621,1105,775],{"class":784},[621,1107,1108],{"class":717},"orderId",[621,1110,903],{"class":784},[621,1112,1113,1115,1118,1120,1122,1124,1126],{"class":623,"line":897},[621,1114,1092],{"class":851},[621,1116,1117],{"class":717}," log",[621,1119,875],{"class":713},[621,1121,962],{"class":772},[621,1123,775],{"class":784},[621,1125,845],{"class":717},[621,1127,903],{"class":784},[621,1129,1131,1134,1136,1139,1141,1143,1145,1147,1149,1152,1154,1156,1158,1161,1164,1167,1169,1171,1173,1176,1178,1181,1183,1185,1187,1190,1192,1194],{"class":623,"line":1130},11,[621,1132,1133],{"class":717},"    log",[621,1135,864],{"class":713},[621,1137,1138],{"class":772},"set",[621,1140,775],{"class":784},[621,1142,1043],{"class":713},[621,1144,1095],{"class":784},[621,1146,697],{"class":713},[621,1148,714],{"class":713},[621,1150,1151],{"class":784}," id",[621,1153,697],{"class":713},[621,1155,1095],{"class":717},[621,1157,864],{"class":713},[621,1159,1160],{"class":717},"id",[621,1162,1163],{"class":713},",",[621,1165,1166],{"class":784}," amount",[621,1168,697],{"class":713},[621,1170,1095],{"class":717},[621,1172,864],{"class":713},[621,1174,1175],{"class":717},"amount",[621,1177,1163],{"class":713},[621,1179,1180],{"class":784}," status",[621,1182,697],{"class":713},[621,1184,1095],{"class":717},[621,1186,864],{"class":713},[621,1188,1189],{"class":717},"status",[621,1191,721],{"class":713},[621,1193,721],{"class":713},[621,1195,903],{"class":784},[621,1197,1199,1202],{"class":623,"line":1198},12,[621,1200,1201],{"class":709},"    return",[621,1203,1204],{"class":717}," order\n",[621,1206,1208],{"class":623,"line":1207},13,[621,1209,894],{"class":713},[621,1211,1213,1215],{"class":623,"line":1212},14,[621,1214,900],{"class":713},[621,1216,903],{"class":717},[603,1218,1220],{"id":1219},"_4-nextjs-web-chat-optional","4. Next.js web chat (optional)",[454,1222,1223,1224,1227,1228,1231,1232,1235,1236,1231,1239,1242,1243,1246,1247,1250,1251,1254,1255,864],{},"Wrap ",[473,1225,1226],{},"next.config.ts"," with ",[473,1229,1230],{},"withEve()"," from ",[473,1233,1234],{},"eve\u002Fnext"," and use ",[473,1237,1238],{},"useEveAgent()",[473,1240,1241],{},"eve\u002Freact"," in your app. Eve starts alongside ",[473,1244,1245],{},"next dev"," and proxies ",[473,1248,1249],{},"\u002Feve\u002Fv1\u002F*"," on the same origin — tool calls, approvals, and ",[473,1252,1253],{},"ask_question"," work out of the box. See the ",[457,1256,926],{"href":924,"rel":1257},[461],[541,1259,1261],{"id":1260},"wide-event-shape","Wide event shape",[454,1263,1264],{},"Each completed turn emits one event:",[611,1266,1271],{"className":1267,"code":1268,"filename":1269,"language":1270,"meta":617,"style":617},"language-json shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","{\n  \"method\": \"EVE\",\n  \"path\": \"\u002Fsessions\u002Fsess_abc\u002Fturns\u002Fturn_0\",\n  \"status\": 200,\n  \"duration\": \"4.2s\",\n  \"service\": \"clearbill-support-agent\",\n  \"eve\": {\n    \"sessionId\": \"sess_abc\",\n    \"turnId\": \"turn_0\",\n    \"turnSequence\": 0\n  },\n  \"customer\": { \"slug\": \"acme-corp\", \"plan\": \"enterprise\", \"mrr\": 2400 },\n  \"order\": { \"id\": \"4821\", \"amount\": 890, \"currency\": \"USD\" },\n  \"refund\": { \"orderId\": \"4821\", \"amount\": 890, \"requiresApproval\": true },\n  \"audit\": { \"action\": \"refund.issued\", \"actor\": { \"type\": \"agent\", \"id\": \"…\" }, \"target\": { \"type\": \"order\", \"id\": \"4821\" } },\n  \"ai\": {\n    \"calls\": 3,\n    \"steps\": 3,\n    \"inputTokens\": 3312,\n    \"outputTokens\": 814,\n    \"tools\": [\n      { \"name\": \"lookup_customer\", \"success\": true },\n      { \"name\": \"lookup_order\", \"success\": true },\n      { \"name\": \"issue_refund\", \"success\": true }\n    ]\n  }\n}\n","Wide Event — support refund turn","json",[473,1272,1273,1277,1300,1320,1336,1356,1376,1388,1409,1429,1443,1447,1510,1571,1626,1749,1763,1780,1796,1813,1830,1845,1882,1916,1951,1957,1963],{"__ignoreMap":617},[621,1274,1275],{"class":623,"line":624},[621,1276,778],{"class":713},[621,1278,1279,1282,1285,1288,1290,1293,1296,1298],{"class":623,"line":735},[621,1280,1281],{"class":713},"  \"",[621,1283,1284],{"class":851},"method",[621,1286,1287],{"class":713},"\"",[621,1289,697],{"class":713},[621,1291,1292],{"class":713}," \"",[621,1294,1295],{"class":630},"EVE",[621,1297,1287],{"class":713},[621,1299,830],{"class":713},[621,1301,1302,1304,1307,1309,1311,1313,1316,1318],{"class":623,"line":756},[621,1303,1281],{"class":713},[621,1305,1306],{"class":851},"path",[621,1308,1287],{"class":713},[621,1310,697],{"class":713},[621,1312,1292],{"class":713},[621,1314,1315],{"class":630},"\u002Fsessions\u002Fsess_abc\u002Fturns\u002Fturn_0",[621,1317,1287],{"class":713},[621,1319,830],{"class":713},[621,1321,1322,1324,1326,1328,1330,1334],{"class":623,"line":763},[621,1323,1281],{"class":713},[621,1325,1189],{"class":851},[621,1327,1287],{"class":713},[621,1329,697],{"class":713},[621,1331,1333],{"class":1332},"sbssI"," 200",[621,1335,830],{"class":713},[621,1337,1338,1340,1343,1345,1347,1349,1352,1354],{"class":623,"line":781},[621,1339,1281],{"class":713},[621,1341,1342],{"class":851},"duration",[621,1344,1287],{"class":713},[621,1346,697],{"class":713},[621,1348,1292],{"class":713},[621,1350,1351],{"class":630},"4.2s",[621,1353,1287],{"class":713},[621,1355,830],{"class":713},[621,1357,1358,1360,1363,1365,1367,1369,1372,1374],{"class":623,"line":817},[621,1359,1281],{"class":713},[621,1361,1362],{"class":851},"service",[621,1364,1287],{"class":713},[621,1366,697],{"class":713},[621,1368,1292],{"class":713},[621,1370,1371],{"class":630},"clearbill-support-agent",[621,1373,1287],{"class":713},[621,1375,830],{"class":713},[621,1377,1378,1380,1382,1384,1386],{"class":623,"line":833},[621,1379,1281],{"class":713},[621,1381,492],{"class":851},[621,1383,1287],{"class":713},[621,1385,697],{"class":713},[621,1387,855],{"class":713},[621,1389,1390,1393,1396,1398,1400,1402,1405,1407],{"class":623,"line":858},[621,1391,1392],{"class":713},"    \"",[621,1394,1395],{"class":627},"sessionId",[621,1397,1287],{"class":713},[621,1399,697],{"class":713},[621,1401,1292],{"class":713},[621,1403,1404],{"class":630},"sess_abc",[621,1406,1287],{"class":713},[621,1408,830],{"class":713},[621,1410,1411,1413,1416,1418,1420,1422,1425,1427],{"class":623,"line":891},[621,1412,1392],{"class":713},[621,1414,1415],{"class":627},"turnId",[621,1417,1287],{"class":713},[621,1419,697],{"class":713},[621,1421,1292],{"class":713},[621,1423,1424],{"class":630},"turn_0",[621,1426,1287],{"class":713},[621,1428,830],{"class":713},[621,1430,1431,1433,1436,1438,1440],{"class":623,"line":897},[621,1432,1392],{"class":713},[621,1434,1435],{"class":627},"turnSequence",[621,1437,1287],{"class":713},[621,1439,697],{"class":713},[621,1441,1442],{"class":1332}," 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3",[621,1779,830],{"class":713},[621,1781,1783,1785,1788,1790,1792,1794],{"class":623,"line":1782},18,[621,1784,1392],{"class":713},[621,1786,1787],{"class":627},"steps",[621,1789,1287],{"class":713},[621,1791,697],{"class":713},[621,1793,1777],{"class":1332},[621,1795,830],{"class":713},[621,1797,1799,1801,1804,1806,1808,1811],{"class":623,"line":1798},19,[621,1800,1392],{"class":713},[621,1802,1803],{"class":627},"inputTokens",[621,1805,1287],{"class":713},[621,1807,697],{"class":713},[621,1809,1810],{"class":1332}," 3312",[621,1812,830],{"class":713},[621,1814,1816,1818,1821,1823,1825,1828],{"class":623,"line":1815},20,[621,1817,1392],{"class":713},[621,1819,1820],{"class":627},"outputTokens",[621,1822,1287],{"class":713},[621,1824,697],{"class":713},[621,1826,1827],{"class":1332}," 814",[621,1829,830],{"class":713},[621,1831,1833,1835,1838,1840,1842],{"class":623,"line":1832},21,[621,1834,1392],{"class":713},[621,1836,1837],{"class":627},"tools",[621,1839,1287],{"class":713},[621,1841,697],{"class":713},[621,1843,1844],{"class":713}," [\n",[621,1846,1848,1851,1853,1856,1858,1860,1862,1865,1867,1869,1871,1874,1876,1878,1880],{"class":623,"line":1847},22,[621,1849,1850],{"class":713},"      {",[621,1852,1292],{"class":713},[621,1854,1855],{"class":1332},"name",[621,1857,1287],{"class":713},[621,1859,697],{"class":713},[621,1861,1292],{"class":713},[621,1863,1864],{"class":630},"lookup_customer",[621,1866,1287],{"class":713},[621,1868,1163],{"class":713},[621,1870,1292],{"class":713},[621,1872,1873],{"class":1332},"success",[621,1875,1287],{"class":713},[621,1877,697],{"class":713},[621,1879,1623],{"class":713},[621,1881,814],{"class":713},[621,1883,1885,1887,1889,1891,1893,1895,1897,1900,1902,1904,1906,1908,1910,1912,1914],{"class":623,"line":1884},23,[621,1886,1850],{"class":713},[621,1888,1292],{"class":713},[621,1890,1855],{"class":1332},[621,1892,1287],{"class":713},[621,1894,697],{"class":713},[621,1896,1292],{"class":713},[621,1898,1899],{"class":630},"lookup_order",[621,1901,1287],{"class":713},[621,1903,1163],{"class":713},[621,1905,1292],{"class":713},[621,1907,1873],{"class":1332},[621,1909,1287],{"class":713},[621,1911,697],{"class":713},[621,1913,1623],{"class":713},[621,1915,814],{"class":713},[621,1917,1919,1921,1923,1925,1927,1929,1931,1934,1936,1938,1940,1942,1944,1946,1948],{"class":623,"line":1918},24,[621,1920,1850],{"class":713},[621,1922,1292],{"class":713},[621,1924,1855],{"class":1332},[621,1926,1287],{"class":713},[621,1928,697],{"class":713},[621,1930,1292],{"class":713},[621,1932,1933],{"class":630},"issue_refund",[621,1935,1287],{"class":713},[621,1937,1163],{"class":713},[621,1939,1292],{"class":713},[621,1941,1873],{"class":1332},[621,1943,1287],{"class":713},[621,1945,697],{"class":713},[621,1947,1623],{"class":713},[621,1949,1950],{"class":713}," }\n",[621,1952,1954],{"class":623,"line":1953},25,[621,1955,1956],{"class":713},"    ]\n",[621,1958,1960],{"class":623,"line":1959},26,[621,1961,1962],{"class":713},"  }\n",[621,1964,1966],{"class":623,"line":1965},27,[621,1967,1968],{"class":713},"}\n",[454,1970,1971,1972,1975,1976,1979,1980,864],{},"Token usage and tool executions are accumulated from Eve stream events (",[473,1973,1974],{},"step.completed",", ",[473,1977,1978],{},"action.result","). Eve owns the model loop — you do not wrap the model with ",[473,1981,1982],{},"evlog\u002Fai",[541,1984,274],{"id":1985},"options",[546,1987,1988,1998],{},[549,1989,1990],{},[552,1991,1992,1995],{},[555,1993,1994],{},"Option",[555,1996,1997],{},"Description",[562,1999,2000,2014,2036,2050],{},[552,2001,2002,2007],{},[567,2003,2004],{},[473,2005,2006],{},"init",[567,2008,2009,2010,2013],{},"Passed to ",[473,2011,2012],{},"initLogger()"," on first hook invocation",[552,2015,2016,2031],{},[567,2017,2018,2021,2022,2021,2025,2021,2028],{},[473,2019,2020],{},"drain"," \u002F ",[473,2023,2024],{},"enrich",[473,2026,2027],{},"keep",[473,2029,2030],{},"plugins",[567,2032,2033,2034,848],{},"Same as HTTP integrations (",[457,2035,2030],{"href":391},[552,2037,2038,2043],{},[567,2039,2040],{},[473,2041,2042],{},"redactMessage",[567,2044,2045,2046,2049],{},"Default ",[473,2047,2048],{},"true"," — omits user message text from the wide event",[552,2051,2052,2060],{},[567,2053,2054,2021,2057],{},[473,2055,2056],{},"include",[473,2058,2059],{},"exclude",[567,2061,2062,2063,848],{},"Route-style filters on turn paths (",[473,2064,2065],{},"\u002Fsessions\u002F*\u002Fturns\u002F*",[541,2067,398],{"id":2068},"tail-sampling",[454,2070,2071,2072,2074],{},"Use ",[473,2073,2027],{}," to force-keep turns with failed tools or high token usage:",[611,2076,2078],{"className":700,"code":2077,"filename":696,"language":702,"meta":617,"style":617},"export default defineEvlogHook({\n  drain: createAxiomDrain(),\n  keep: (ctx) => {\n    const ai = ctx.context.ai as { totalTokens?: number, tools?: Array\u003C{ success: boolean }> } | undefined\n    if ((ai?.totalTokens ?? 0) > 10_000) ctx.shouldKeep = true\n    if (ai?.tools?.some(t => !t.success)) ctx.shouldKeep = true\n  },\n})\n",[473,2079,2080,2092,2104,2121,2187,2233,2279,2283],{"__ignoreMap":617},[621,2081,2082,2084,2086,2088,2090],{"class":623,"line":624},[621,2083,766],{"class":709},[621,2085,769],{"class":709},[621,2087,718],{"class":772},[621,2089,775],{"class":717},[621,2091,778],{"class":713},[621,2093,2094,2096,2098,2100,2102],{"class":623,"line":735},[621,2095,820],{"class":784},[621,2097,697],{"class":713},[621,2099,742],{"class":772},[621,2101,827],{"class":717},[621,2103,830],{"class":713},[621,2105,2106,2109,2111,2113,2115,2117,2119],{"class":623,"line":756},[621,2107,2108],{"class":772},"  keep",[621,2110,697],{"class":713},[621,2112,841],{"class":713},[621,2114,845],{"class":844},[621,2116,848],{"class":713},[621,2118,852],{"class":851},[621,2120,855],{"class":713},[621,2122,2123,2125,2128,2130,2132,2134,2137,2139,2141,2144,2146,2149,2152,2155,2157,2160,2162,2165,2168,2171,2173,2176,2179,2181,2184],{"class":623,"line":763},[621,2124,1092],{"class":851},[621,2126,2127],{"class":717}," ai",[621,2129,875],{"class":713},[621,2131,1083],{"class":717},[621,2133,864],{"class":713},[621,2135,2136],{"class":717},"context",[621,2138,864],{"class":713},[621,2140,1756],{"class":717},[621,2142,2143],{"class":709}," as",[621,2145,714],{"class":713},[621,2147,2148],{"class":784}," totalTokens",[621,2150,2151],{"class":713},"?:",[621,2153,2154],{"class":627}," number",[621,2156,1163],{"class":713},[621,2158,2159],{"class":784}," tools",[621,2161,2151],{"class":713},[621,2163,2164],{"class":627}," Array",[621,2166,2167],{"class":713},"\u003C{",[621,2169,2170],{"class":784}," success",[621,2172,697],{"class":713},[621,2174,2175],{"class":627}," boolean",[621,2177,2178],{"class":713}," }>",[621,2180,721],{"class":713},[621,2182,2183],{"class":713}," |",[621,2185,2186],{"class":627}," undefined\n",[621,2188,2189,2192,2195,2197,2200,2203,2206,2209,2212,2215,2218,2220,2222,2224,2227,2229],{"class":623,"line":781},[621,2190,2191],{"class":709},"    if",[621,2193,2194],{"class":784}," ((",[621,2196,1756],{"class":717},[621,2198,2199],{"class":713},"?.",[621,2201,2202],{"class":717},"totalTokens",[621,2204,2205],{"class":713}," ??",[621,2207,2208],{"class":1332}," 0",[621,2210,2211],{"class":784},") ",[621,2213,2214],{"class":713},">",[621,2216,2217],{"class":1332}," 10_000",[621,2219,2211],{"class":784},[621,2221,845],{"class":717},[621,2223,864],{"class":713},[621,2225,2226],{"class":717},"shouldKeep",[621,2228,875],{"class":713},[621,2230,2232],{"class":2231},"sfNiH"," true\n",[621,2234,2235,2237,2239,2241,2243,2245,2247,2250,2252,2255,2257,2260,2262,2264,2266,2269,2271,2273,2275,2277],{"class":623,"line":817},[621,2236,2191],{"class":709},[621,2238,841],{"class":784},[621,2240,1756],{"class":717},[621,2242,2199],{"class":713},[621,2244,1837],{"class":717},[621,2246,2199],{"class":713},[621,2248,2249],{"class":772},"some",[621,2251,775],{"class":784},[621,2253,2254],{"class":844},"t",[621,2256,852],{"class":851},[621,2258,2259],{"class":713}," !",[621,2261,2254],{"class":717},[621,2263,864],{"class":713},[621,2265,1873],{"class":717},[621,2267,2268],{"class":784},")) ",[621,2270,845],{"class":717},[621,2272,864],{"class":713},[621,2274,2226],{"class":717},[621,2276,875],{"class":713},[621,2278,2232],{"class":2231},[621,2280,2281],{"class":623,"line":833},[621,2282,894],{"class":713},[621,2284,2285,2287],{"class":623,"line":858},[621,2286,900],{"class":713},[621,2288,903],{"class":717},[541,2290,2292],{"id":2291},"audit-logs","Audit logs",[454,2294,2295,2296,2298,2299,2302,2303,2306,2307,2310,2311,1227,2313,864],{},"Combine with ",[457,2297,317],{"href":323},": register ",[473,2300,2301],{},"auditEnricher()"," via ",[473,2304,2305],{},"init.plugins"," or a global plugin, and call ",[473,2308,2309],{},"log.audit()"," inside tools when a human approval gate fires. Tool rejections surface on ",[473,2312,1978],{},[473,2314,2315],{},"status: \"rejected\"",[541,2317,2319],{"id":2318},"run-locally","Run locally",[611,2321,2323],{"className":613,"code":2322,"language":616,"meta":617,"style":617},"git clone https:\u002F\u002Fgithub.com\u002FHugoRCD\u002Fevlog\ncd evlog\npnpm install\npnpm run example:eve\n",[473,2324,2325,2336,2344,2351],{"__ignoreMap":617},[621,2326,2327,2330,2333],{"class":623,"line":624},[621,2328,2329],{"class":627},"git",[621,2331,2332],{"class":630}," clone",[621,2334,2335],{"class":630}," https:\u002F\u002Fgithub.com\u002FHugoRCD\u002Fevlog\n",[621,2337,2338,2341],{"class":623,"line":735},[621,2339,2340],{"class":772},"cd",[621,2342,2343],{"class":630}," evlog\n",[621,2345,2346,2348],{"class":623,"line":756},[621,2347,615],{"class":627},[621,2349,2350],{"class":630}," install\n",[621,2352,2353,2355,2358],{"class":623,"line":763},[621,2354,615],{"class":627},[621,2356,2357],{"class":630}," run",[621,2359,2360],{"class":630}," example:eve\n",[454,2362,2363,2364,2367,2368,2371,2372,2375,2376,2382],{},"The ",[473,2365,2366],{},"examples\u002Feve"," project is a ",[464,2369,2370],{},"support refund copilot"," (Clearbill SaaS): lookup customer → lookup order → issue refund, with Eve approvals when amount > $100. Run ",[473,2373,2374],{},"pnpm run example:eve",", open ",[464,2377,2378],{},[457,2379,2380],{"href":2380,"rel":2381},"http:\u002F\u002Flocalhost:3000",[461],", and click a starter prompt.",[541,2384,2386],{"id":2385},"what-to-read-next","What to read next",[507,2388,2389,2397,2405,2411],{},[510,2390,2391,2396],{},[457,2392,2395],{"href":2393,"rel":2394},"https:\u002F\u002Feve.dev\u002Fdocs\u002Fguides\u002Fhooks",[461],"Eve hooks guide"," — stream event vocabulary",[510,2398,2399,2404],{},[457,2400,2403],{"href":2401,"rel":2402},"https:\u002F\u002Feve.dev\u002Fdocs\u002Fguides\u002Finstrumentation",[461],"Eve instrumentation"," — OTel spans (complementary)",[510,2406,2407,2410],{},[457,2408,2409],{"href":266},"AI SDK use case"," — when you own the model loop directly",[510,2412,2413,2416],{},[457,2414,2415],{"href":95},"Adapters overview"," — drain destinations",[2418,2419,2420],"style",{},"html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}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 .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 .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}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 .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 .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}",{"title":617,"searchDepth":735,"depth":735,"links":2422},[2423,2424,2430,2431,2432,2433,2434,2435],{"id":543,"depth":735,"text":544},{"id":601,"depth":735,"text":25,"children":2425},[2426,2427,2428,2429],{"id":605,"depth":756,"text":606},{"id":689,"depth":756,"text":690},{"id":917,"depth":756,"text":918},{"id":1219,"depth":756,"text":1220},{"id":1260,"depth":735,"text":1261},{"id":1985,"depth":735,"text":274},{"id":2068,"depth":735,"text":398},{"id":2291,"depth":735,"text":2292},{"id":2318,"depth":735,"text":2319},{"id":2385,"depth":735,"text":2386},"Export one evlog wide event per Eve agent turn — token usage, tool executions, business context, drains, enrichers, and tail sampling alongside Agent Runs and OpenTelemetry.","md",[2439],{"label":2440,"icon":2441,"to":924,"color":2442,"variant":2443},"Source Code","i-simple-icons-github","neutral","subtle",{},{"title":36,"icon":261},{"title":449,"description":2436},"T_LyaqWVd-xODkt4T-1y-m2n1FKRqkfHDjxLROofi2A",[2449,2451],{"title":349,"path":350,"stem":351,"description":2450,"icon":352,"children":-1},"Add derived context to every wide event automatically — user agent, geo, request size, and trace context. Built-in enrichers from evlog\u002Fenrichers, plus how to compose them with your own.",{"title":36,"path":367,"stem":368,"description":2452,"icon":369,"children":-1},"Observe what flows through the pipeline (stream, fs reader, consumer recipes), plug into the pipeline (plugins, enrichers, tail sampling, identity headers), or build your own bricks (custom drains, drain pipeline, custom framework integration).",1782924663095]