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Install",[679,680,681,709,725,741],"code-group",{},[682,683,689],"pre",{"className":684,"code":685,"filename":686,"language":687,"meta":688,"style":688},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add evlog eve\n","pnpm","bash","",[545,690,691],{"__ignoreMap":688},[692,693,696,699,703,706],"span",{"class":694,"line":695},"line",1,[692,697,686],{"class":698},"sBMFI",[692,700,702],{"class":701},"sfazB"," add",[692,704,705],{"class":701}," evlog",[692,707,708],{"class":701}," eve\n",[682,710,713],{"className":684,"code":711,"filename":712,"language":687,"meta":688,"style":688},"bun add evlog eve\n","bun",[545,714,715],{"__ignoreMap":688},[692,716,717,719,721,723],{"class":694,"line":695},[692,718,712],{"class":698},[692,720,702],{"class":701},[692,722,705],{"class":701},[692,724,708],{"class":701},[682,726,729],{"className":684,"code":727,"filename":728,"language":687,"meta":688,"style":688},"yarn add evlog eve\n","yarn",[545,730,731],{"__ignoreMap":688},[692,732,733,735,737,739],{"class":694,"line":695},[692,734,728],{"class":698},[692,736,702],{"class":701},[692,738,705],{"class":701},[692,740,708],{"class":701},[682,742,745],{"className":684,"code":743,"filename":744,"language":687,"meta":688,"style":688},"npm install evlog eve\n","npm",[545,746,747],{"__ignoreMap":688},[692,748,749,751,754,756],{"class":694,"line":695},[692,750,744],{"class":698},[692,752,753],{"class":701}," install",[692,755,705],{"class":701},[692,757,708],{"class":701},[674,759,761],{"id":760},"_2-add-the-hook","2. Add the hook",[526,763,764,765,768],{},"Create ",[545,766,767],{},"agent\u002Fhooks\u002Fevlog.ts",":",[682,770,774],{"className":771,"code":772,"filename":767,"language":773,"meta":688,"style":688},"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",[545,775,776,804,825,832,850,886,902,927,960,966],{"__ignoreMap":688},[692,777,778,782,786,790,793,796,799,801],{"class":694,"line":695},[692,779,781],{"class":780},"s7zQu","import",[692,783,785],{"class":784},"sMK4o"," {",[692,787,789],{"class":788},"sTEyZ"," defineEvlogHook",[692,791,792],{"class":784}," }",[692,794,795],{"class":780}," from",[692,797,798],{"class":784}," '",[692,800,551],{"class":701},[692,802,803],{"class":784},"'\n",[692,805,807,809,811,814,816,818,820,823],{"class":694,"line":806},2,[692,808,781],{"class":780},[692,810,785],{"class":784},[692,812,813],{"class":788}," createAxiomDrain",[692,815,792],{"class":784},[692,817,795],{"class":780},[692,819,798],{"class":784},[692,821,822],{"class":701},"evlog\u002Faxiom",[692,824,803],{"class":784},[692,826,828],{"class":694,"line":827},3,[692,829,831],{"emptyLinePlaceholder":830},true,"\n",[692,833,835,838,841,844,847],{"class":694,"line":834},4,[692,836,837],{"class":780},"export",[692,839,840],{"class":780}," default",[692,842,789],{"class":843},"s2Zo4",[692,845,846],{"class":788},"(",[692,848,849],{"class":784},"{\n",[692,851,853,857,859,861,864,866,868,871,873,875,878,881,883],{"class":694,"line":852},5,[692,854,856],{"class":855},"swJcz","  init",[692,858,768],{"class":784},[692,860,785],{"class":784},[692,862,863],{"class":855}," env",[692,865,768],{"class":784},[692,867,785],{"class":784},[692,869,870],{"class":855}," service",[692,872,768],{"class":784},[692,874,798],{"class":784},[692,876,877],{"class":701},"my-agent",[692,879,880],{"class":784},"'",[692,882,792],{"class":784},[692,884,885],{"class":784}," },\n",[692,887,889,892,894,896,899],{"class":694,"line":888},6,[692,890,891],{"class":855},"  drain",[692,893,768],{"class":784},[692,895,813],{"class":843},[692,897,898],{"class":788},"()",[692,900,901],{"class":784},",\n",[692,903,905,908,910,913,917,920,924],{"class":694,"line":904},7,[692,906,907],{"class":843},"  enrich",[692,909,768],{"class":784},[692,911,912],{"class":784}," (",[692,914,916],{"class":915},"sHdIc","ctx",[692,918,919],{"class":784},")",[692,921,923],{"class":922},"spNyl"," =>",[692,925,926],{"class":784}," {\n",[692,928,930,933,936,939,941,944,947,950,952,955,957],{"class":694,"line":929},8,[692,931,932],{"class":788},"    ctx",[692,934,935],{"class":784},".",[692,937,938],{"class":788},"event",[692,940,935],{"class":784},[692,942,943],{"class":788},"region",[692,945,946],{"class":784}," =",[692,948,949],{"class":788}," process",[692,951,935],{"class":784},[692,953,954],{"class":788},"env",[692,956,935],{"class":784},[692,958,959],{"class":788},"VERCEL_REGION\n",[692,961,963],{"class":694,"line":962},9,[692,964,965],{"class":784},"  },\n",[692,967,969,972],{"class":694,"line":968},10,[692,970,971],{"class":784},"}",[692,973,974],{"class":788},")\n",[526,976,977,978,981,982,985],{},"eve auto-discovers hook files under ",[545,979,980],{},"agent\u002Fhooks\u002F",". No HTTP middleware — the unit of work is an agent ",[536,983,984],{},"turn",", not a request.",[674,987,989],{"id":988},"_3-log-business-context-from-tools","3. Log business context from tools",[526,991,992,995,996,999,1000,1003,1004,1007,1008,1011,1012,1015],{},[545,993,994],{},"defineEvlogHook()"," binds the turn logger via ",[536,997,998],{},"AsyncLocalStorage"," on ",[545,1001,1002],{},"turn.started",". Inside tool ",[545,1005,1006],{},"execute()"," handlers, call ",[545,1009,1010],{},"useLogger()"," with no arguments — same ergonomics as ",[545,1013,1014],{},"useLogger(event)"," in Nuxt or Hono.",[526,1017,1018,1019,1024],{},"In the ",[529,1020,1023],{"href":1021,"rel":1022},"https:\u002F\u002Fgithub.com\u002FHugoRCD\u002Fevlog\u002Ftree\u002Fmain\u002Fexamples\u002Feve",[533],"example agent",", support tools attach customer and order context as the agent works a refund:",[682,1026,1029],{"className":771,"code":1027,"filename":1028,"language":773,"meta":688,"style":688},"import { defineTool } from 'eve\u002Ftools'\nimport { useLogger } 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 }) {\n    const order = await fetchOrder(orderId)\n    const log = useLogger()\n    log.set({ order: { id: order.id, amount: order.amount, status: order.status } })\n    return order\n  },\n})\n","agent\u002Ftools\u002Flookup_order.ts",[545,1030,1031,1051,1070,1090,1094,1106,1122,1162,1180,1203,1217,1285,1294,1299],{"__ignoreMap":688},[692,1032,1033,1035,1037,1040,1042,1044,1046,1049],{"class":694,"line":695},[692,1034,781],{"class":780},[692,1036,785],{"class":784},[692,1038,1039],{"class":788}," defineTool",[692,1041,792],{"class":784},[692,1043,795],{"class":780},[692,1045,798],{"class":784},[692,1047,1048],{"class":701},"eve\u002Ftools",[692,1050,803],{"class":784},[692,1052,1053,1055,1057,1060,1062,1064,1066,1068],{"class":694,"line":806},[692,1054,781],{"class":780},[692,1056,785],{"class":784},[692,1058,1059],{"class":788}," useLogger",[692,1061,792],{"class":784},[692,1063,795],{"class":780},[692,1065,798],{"class":784},[692,1067,551],{"class":701},[692,1069,803],{"class":784},[692,1071,1072,1074,1076,1079,1081,1083,1085,1088],{"class":694,"line":827},[692,1073,781],{"class":780},[692,1075,785],{"class":784},[692,1077,1078],{"class":788}," z",[692,1080,792],{"class":784},[692,1082,795],{"class":780},[692,1084,798],{"class":784},[692,1086,1087],{"class":701},"zod",[692,1089,803],{"class":784},[692,1091,1092],{"class":694,"line":834},[692,1093,831],{"emptyLinePlaceholder":830},[692,1095,1096,1098,1100,1102,1104],{"class":694,"line":852},[692,1097,837],{"class":780},[692,1099,840],{"class":780},[692,1101,1039],{"class":843},[692,1103,846],{"class":788},[692,1105,849],{"class":784},[692,1107,1108,1111,1113,1115,1118,1120],{"class":694,"line":888},[692,1109,1110],{"class":855},"  description",[692,1112,768],{"class":784},[692,1114,798],{"class":784},[692,1116,1117],{"class":701},"Look up an order by id.",[692,1119,880],{"class":784},[692,1121,901],{"class":784},[692,1123,1124,1127,1129,1131,1133,1136,1138,1141,1144,1146,1148,1150,1153,1156,1158,1160],{"class":694,"line":904},[692,1125,1126],{"class":855},"  inputSchema",[692,1128,768],{"class":784},[692,1130,1078],{"class":788},[692,1132,935],{"class":784},[692,1134,1135],{"class":843},"object",[692,1137,846],{"class":788},[692,1139,1140],{"class":784},"{",[692,1142,1143],{"class":855}," orderId",[692,1145,768],{"class":784},[692,1147,1078],{"class":788},[692,1149,935],{"class":784},[692,1151,1152],{"class":843},"string",[692,1154,1155],{"class":788},"() ",[692,1157,971],{"class":784},[692,1159,919],{"class":788},[692,1161,901],{"class":784},[692,1163,1164,1167,1170,1173,1175,1178],{"class":694,"line":929},[692,1165,1166],{"class":922},"  async",[692,1168,1169],{"class":855}," execute",[692,1171,1172],{"class":784},"({",[692,1174,1143],{"class":915},[692,1176,1177],{"class":784}," })",[692,1179,926],{"class":784},[692,1181,1182,1185,1188,1190,1193,1196,1198,1201],{"class":694,"line":962},[692,1183,1184],{"class":922},"    const",[692,1186,1187],{"class":788}," order",[692,1189,946],{"class":784},[692,1191,1192],{"class":780}," await",[692,1194,1195],{"class":843}," fetchOrder",[692,1197,846],{"class":855},[692,1199,1200],{"class":788},"orderId",[692,1202,974],{"class":855},[692,1204,1205,1207,1210,1212,1214],{"class":694,"line":968},[692,1206,1184],{"class":922},[692,1208,1209],{"class":788}," log",[692,1211,946],{"class":784},[692,1213,1059],{"class":843},[692,1215,1216],{"class":855},"()\n",[692,1218,1220,1223,1225,1228,1230,1232,1234,1236,1238,1241,1243,1245,1247,1250,1253,1256,1258,1260,1262,1265,1267,1270,1272,1274,1276,1279,1281,1283],{"class":694,"line":1219},11,[692,1221,1222],{"class":788},"    log",[692,1224,935],{"class":784},[692,1226,1227],{"class":843},"set",[692,1229,846],{"class":855},[692,1231,1140],{"class":784},[692,1233,1187],{"class":855},[692,1235,768],{"class":784},[692,1237,785],{"class":784},[692,1239,1240],{"class":855}," id",[692,1242,768],{"class":784},[692,1244,1187],{"class":788},[692,1246,935],{"class":784},[692,1248,1249],{"class":788},"id",[692,1251,1252],{"class":784},",",[692,1254,1255],{"class":855}," amount",[692,1257,768],{"class":784},[692,1259,1187],{"class":788},[692,1261,935],{"class":784},[692,1263,1264],{"class":788},"amount",[692,1266,1252],{"class":784},[692,1268,1269],{"class":855}," status",[692,1271,768],{"class":784},[692,1273,1187],{"class":788},[692,1275,935],{"class":784},[692,1277,1278],{"class":788},"status",[692,1280,792],{"class":784},[692,1282,792],{"class":784},[692,1284,974],{"class":855},[692,1286,1288,1291],{"class":694,"line":1287},12,[692,1289,1290],{"class":780},"    return",[692,1292,1293],{"class":788}," order\n",[692,1295,1297],{"class":694,"line":1296},13,[692,1298,965],{"class":784},[692,1300,1302,1304],{"class":694,"line":1301},14,[692,1303,971],{"class":784},[692,1305,974],{"class":788},[558,1307,1309,1312,1313,1315,1316,1318,1319,1322,1323,1325],{"color":1308,"icon":131},"neutral",[536,1310,1311],{},"Fallback:"," if ",[545,1314,1010],{}," throws outside a turn, pass eve tool ",[545,1317,916],{},": ",[545,1320,1321],{},"useLogger(ctx)",". This covers separate hook\u002Ftool bundles or runtimes where AsyncLocalStorage does not propagate. With a standard eve agent layout and ",[545,1324,767],{}," registered, you should not need it.",[674,1327,1329],{"id":1328},"_4-nextjs-web-chat-optional","4. Next.js web chat (optional)",[526,1331,1332,1333,1336,1337,1340,1341,1344,1345,1340,1348,1351,1352,1355,1356,1359,1360,1363,1364,935],{},"Wrap ",[545,1334,1335],{},"next.config.ts"," with ",[545,1338,1339],{},"withEve()"," from ",[545,1342,1343],{},"eve\u002Fnext"," and use ",[545,1346,1347],{},"useEveAgent()",[545,1349,1350],{},"eve\u002Freact"," in your app. eve starts alongside ",[545,1353,1354],{},"next dev"," and proxies ",[545,1357,1358],{},"\u002Feve\u002Fv1\u002F*"," on the same origin — tool calls, approvals, and ",[545,1361,1362],{},"ask_question"," work out of the box. See the ",[529,1365,1023],{"href":1021,"rel":1366},[533],[612,1368,1370],{"id":1369},"wide-event-shape","Wide event shape",[526,1372,1373],{},"Each completed turn emits one event:",[682,1375,1380],{"className":1376,"code":1377,"filename":1378,"language":1379,"meta":688,"style":688},"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\": \"7.9s\",\n  \"durationMs\": 7903,\n  \"service\": \"clearbill-support-agent\",\n  \"eve\": {\n    \"sessionId\": \"sess_abc\",\n    \"turnId\": \"turn_0\",\n    \"turnSequence\": 0,\n    \"phase\": \"awaiting-approval\",\n    \"sessionTurns\": 1\n  },\n  \"customer\": { \"slug\": \"acme-corp\", \"plan\": \"enterprise\" },\n  \"order\": { \"id\": \"4821\", \"amount\": 890, \"currency\": \"USD\" },\n  \"approval\": { \"status\": \"pending\", \"tool\": \"issue_refund\" },\n  \"ai\": {\n    \"calls\": 2,\n    \"steps\": 2,\n    \"inputTokens\": 11724,\n    \"outputTokens\": 282,\n    \"finishReason\": \"tool-calls\",\n    \"tools\": [\n      { \"name\": \"lookup_customer\", \"durationMs\": 26, \"success\": true },\n      { \"name\": \"lookup_order\", \"durationMs\": 13, \"success\": true }\n    ]\n  }\n}\n","Wide Event — turn awaiting approval","json",[545,1381,1382,1386,1409,1429,1445,1465,1481,1501,1513,1534,1554,1570,1590,1604,1608,1658,1720,1769,1783,1800,1816,1833,1850,1871,1886,1937,1985,1991,1997],{"__ignoreMap":688},[692,1383,1384],{"class":694,"line":695},[692,1385,849],{"class":784},[692,1387,1388,1391,1394,1397,1399,1402,1405,1407],{"class":694,"line":806},[692,1389,1390],{"class":784},"  \"",[692,1392,1393],{"class":922},"method",[692,1395,1396],{"class":784},"\"",[692,1398,768],{"class":784},[692,1400,1401],{"class":784}," \"",[692,1403,1404],{"class":701},"EVE",[692,1406,1396],{"class":784},[692,1408,901],{"class":784},[692,1410,1411,1413,1416,1418,1420,1422,1425,1427],{"class":694,"line":827},[692,1412,1390],{"class":784},[692,1414,1415],{"class":922},"path",[692,1417,1396],{"class":784},[692,1419,768],{"class":784},[692,1421,1401],{"class":784},[692,1423,1424],{"class":701},"\u002Fsessions\u002Fsess_abc\u002Fturns\u002Fturn_0",[692,1426,1396],{"class":784},[692,1428,901],{"class":784},[692,1430,1431,1433,1435,1437,1439,1443],{"class":694,"line":834},[692,1432,1390],{"class":784},[692,1434,1278],{"class":922},[692,1436,1396],{"class":784},[692,1438,768],{"class":784},[692,1440,1442],{"class":1441},"sbssI"," 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[{",[692,2322,1401],{"class":784},[692,2324,1896],{"class":1441},[692,2326,1396],{"class":784},[692,2328,768],{"class":784},[692,2330,1401],{"class":784},[692,2332,1764],{"class":701},[692,2334,1396],{"class":784},[692,2336,1252],{"class":784},[692,2338,1401],{"class":784},[692,2340,1471],{"class":1441},[692,2342,1396],{"class":784},[692,2344,768],{"class":784},[692,2346,2347],{"class":1441}," 993",[692,2349,1252],{"class":784},[692,2351,1401],{"class":784},[692,2353,1927],{"class":1441},[692,2355,1396],{"class":784},[692,2357,768],{"class":784},[692,2359,1934],{"class":784},[692,2361,2362],{"class":784}," }],\n",[692,2364,2365,2367,2369,2371,2373,2375,2378],{"class":694,"line":1301},[692,2366,1517],{"class":784},[692,2368,1857],{"class":698},[692,2370,1396],{"class":784},[692,2372,768],{"class":784},[692,2374,1401],{"class":784},[692,2376,2377],{"class":701},"stop",[692,2379,2380],{"class":784},"\"\n",[692,2382,2383],{"class":694,"line":1610},[692,2384,1996],{"class":784},[692,2386,2387],{"class":694,"line":1660},[692,2388,2002],{"class":784},[526,2390,2391,2392,2395,2396,2395,2399,2402,2403,2405,2406,2409,2410,2413,2414,2417,2418,2395,2420,2395,2423,2426],{},"Token usage and tool executions are accumulated from eve stream events (",[545,2393,2394],{},"step.completed",", ",[545,2397,2398],{},"actions.requested",[545,2400,2401],{},"action.result","). Business fields set via ",[545,2404,1010],{}," carry across turns in the same session. Link turns in analytics with ",[545,2407,2408],{},"eve.sessionId"," + ",[545,2411,2412],{},"eve.turnSequence"," — each event stays self-contained. ",[545,2415,2416],{},"eve.phase"," is only set for non-routine endings (",[545,2419,1585],{},[545,2421,2422],{},"rejected",[545,2424,2425],{},"failed",").",[612,2428,2430],{"id":2429},"production","Production",[526,2432,2433],{},"Long-running eve agents should disable terminal pretty-printing and use a non-blocking drain:",[682,2435,2437],{"className":771,"code":2436,"filename":767,"language":773,"meta":688,"style":688},"import { defineEvlogHook } from 'evlog\u002Feve'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\nimport { createDrainPipeline } from 'evlog\u002Fpipeline'\n\nconst drain = createDrainPipeline({ batch: { size: 50, intervalMs: 5000 } })(\n  createAxiomDrain(),\n)\n\nexport default defineEvlogHook({\n  init: {\n    env: { service: 'my-agent', environment: 'production' },\n    pretty: false,\n    sampling: { rates: { info: 10 } },\n  },\n  drain,\n  maxSessions: 256,\n})\n",[545,2438,2439,2457,2475,2495,2499,2548,2557,2561,2565,2577,2585,2619,2632,2660,2664,2670,2682],{"__ignoreMap":688},[692,2440,2441,2443,2445,2447,2449,2451,2453,2455],{"class":694,"line":695},[692,2442,781],{"class":780},[692,2444,785],{"class":784},[692,2446,789],{"class":788},[692,2448,792],{"class":784},[692,2450,795],{"class":780},[692,2452,798],{"class":784},[692,2454,551],{"class":701},[692,2456,803],{"class":784},[692,2458,2459,2461,2463,2465,2467,2469,2471,2473],{"class":694,"line":806},[692,2460,781],{"class":780},[692,2462,785],{"class":784},[692,2464,813],{"class":788},[692,2466,792],{"class":784},[692,2468,795],{"class":780},[692,2470,798],{"class":784},[692,2472,822],{"class":701},[692,2474,803],{"class":784},[692,2476,2477,2479,2481,2484,2486,2488,2490,2493],{"class":694,"line":827},[692,2478,781],{"class":780},[692,2480,785],{"class":784},[692,2482,2483],{"class":788}," createDrainPipeline",[692,2485,792],{"class":784},[692,2487,795],{"class":780},[692,2489,798],{"class":784},[692,2491,2492],{"class":701},"evlog\u002Fpipeline",[692,2494,803],{"class":784},[692,2496,2497],{"class":694,"line":834},[692,2498,831],{"emptyLinePlaceholder":830},[692,2500,2501,2504,2507,2510,2512,2514,2516,2519,2521,2523,2526,2528,2531,2533,2536,2538,2541,2543,2545],{"class":694,"line":852},[692,2502,2503],{"class":922},"const",[692,2505,2506],{"class":788}," drain ",[692,2508,2509],{"class":784},"=",[692,2511,2483],{"class":843},[692,2513,846],{"class":788},[692,2515,1140],{"class":784},[692,2517,2518],{"class":855}," batch",[692,2520,768],{"class":784},[692,2522,785],{"class":784},[692,2524,2525],{"class":855}," size",[692,2527,768],{"class":784},[692,2529,2530],{"class":1441}," 50",[692,2532,1252],{"class":784},[692,2534,2535],{"class":855}," intervalMs",[692,2537,768],{"class":784},[692,2539,2540],{"class":1441}," 5000",[692,2542,792],{"class":784},[692,2544,792],{"class":784},[692,2546,2547],{"class":788},")(\n",[692,2549,2550,2553,2555],{"class":694,"line":888},[692,2551,2552],{"class":843},"  createAxiomDrain",[692,2554,898],{"class":788},[692,2556,901],{"class":784},[692,2558,2559],{"class":694,"line":904},[692,2560,974],{"class":788},[692,2562,2563],{"class":694,"line":929},[692,2564,831],{"emptyLinePlaceholder":830},[692,2566,2567,2569,2571,2573,2575],{"class":694,"line":962},[692,2568,837],{"class":780},[692,2570,840],{"class":780},[692,2572,789],{"class":843},[692,2574,846],{"class":788},[692,2576,849],{"class":784},[692,2578,2579,2581,2583],{"class":694,"line":968},[692,2580,856],{"class":855},[692,2582,768],{"class":784},[692,2584,926],{"class":784},[692,2586,2587,2590,2592,2594,2596,2598,2600,2602,2604,2606,2609,2611,2613,2615,2617],{"class":694,"line":1219},[692,2588,2589],{"class":855},"    env",[692,2591,768],{"class":784},[692,2593,785],{"class":784},[692,2595,870],{"class":855},[692,2597,768],{"class":784},[692,2599,798],{"class":784},[692,2601,877],{"class":701},[692,2603,880],{"class":784},[692,2605,1252],{"class":784},[692,2607,2608],{"class":855}," environment",[692,2610,768],{"class":784},[692,2612,798],{"class":784},[692,2614,2429],{"class":701},[692,2616,880],{"class":784},[692,2618,885],{"class":784},[692,2620,2621,2624,2626,2630],{"class":694,"line":1287},[692,2622,2623],{"class":855},"    pretty",[692,2625,768],{"class":784},[692,2627,2629],{"class":2628},"sfNiH"," false",[692,2631,901],{"class":784},[692,2633,2634,2637,2639,2641,2644,2646,2648,2651,2653,2656,2658],{"class":694,"line":1296},[692,2635,2636],{"class":855},"    sampling",[692,2638,768],{"class":784},[692,2640,785],{"class":784},[692,2642,2643],{"class":855}," rates",[692,2645,768],{"class":784},[692,2647,785],{"class":784},[692,2649,2650],{"class":855}," info",[692,2652,768],{"class":784},[692,2654,2655],{"class":1441}," 10",[692,2657,792],{"class":784},[692,2659,885],{"class":784},[692,2661,2662],{"class":694,"line":1301},[692,2663,965],{"class":784},[692,2665,2666,2668],{"class":694,"line":1610},[692,2667,891],{"class":788},[692,2669,901],{"class":784},[692,2671,2672,2675,2677,2680],{"class":694,"line":1660},[692,2673,2674],{"class":855},"  maxSessions",[692,2676,768],{"class":784},[692,2678,2679],{"class":1441}," 256",[692,2681,901],{"class":784},[692,2683,2684,2686],{"class":694,"line":1722},[692,2685,971],{"class":784},[692,2687,974],{"class":788},[617,2689,2690,2700],{},[620,2691,2692],{},[623,2693,2694,2697],{},[626,2695,2696],{},"Concern",[626,2698,2699],{},"Recommendation",[633,2701,2702,2713,2721,2732,2746],{},[623,2703,2704,2707],{},[638,2705,2706],{},"Terminal output",[638,2708,2709,2712],{},[545,2710,2711],{},"init.pretty: false"," — pretty-print is for local dev only",[623,2714,2715,2718],{},[638,2716,2717],{},"Drain latency",[638,2719,2720],{},"Batch or async HTTP drains; never block the turn on I\u002FO",[623,2722,2723,2726],{},[638,2724,2725],{},"Head sampling",[638,2727,2728,2731],{},[545,2729,2730],{},"init.sampling.rates"," — eve emits one event per turn, not per token",[623,2733,2734,2736],{},[638,2735,211],{},[638,2737,2738,2741,2742,2745],{},[545,2739,2740],{},"maxSessions"," (default ",[545,2743,2744],{},"256",") evicts oldest idle session state",[623,2747,2748,2751],{},[638,2749,2750],{},"Load",[638,2752,2753],{},"Hook handlers are O(1) per stream event; cost is dominated by your drain",[612,2755,331],{"id":2756},"options",[617,2758,2759,2769],{},[620,2760,2761],{},[623,2762,2763,2766],{},[626,2764,2765],{},"Option",[626,2767,2768],{},"Description",[633,2770,2771,2784,2806,2820,2843,2854],{},[623,2772,2773,2777],{},[638,2774,2775],{},[545,2776,89],{},[638,2778,2779,2780,2783],{},"Passed to ",[545,2781,2782],{},"initLogger()"," on first hook invocation",[623,2785,2786,2801],{},[638,2787,2788,2791,2792,2791,2795,2791,2798],{},[545,2789,2790],{},"drain"," \u002F ",[545,2793,2794],{},"enrich",[545,2796,2797],{},"keep",[545,2799,2800],{},"plugins",[638,2802,2803,2804,919],{},"Same as HTTP integrations (",[529,2805,2800],{"href":465},[623,2807,2808,2813],{},[638,2809,2810],{},[545,2811,2812],{},"redactMessage",[638,2814,2815,2816,2819],{},"Default ",[545,2817,2818],{},"true"," — omits user message text from the wide event",[623,2821,2822,2830],{},[638,2823,2824,2791,2827],{},[545,2825,2826],{},"cost",[545,2828,2829],{},"model",[638,2831,2832,2833,1340,2836,2839,2840],{},"Optional token pricing (",[545,2834,2835],{},"ModelCost",[545,2837,2838],{},"evlog\u002Fai",") → ",[545,2841,2842],{},"ai.estimatedCost",[623,2844,2845,2849],{},[638,2846,2847],{},[545,2848,2740],{},[638,2850,2851,2852,919],{},"In-memory session cap for context carry-over (default ",[545,2853,2744],{},[623,2855,2856,2864],{},[638,2857,2858,2791,2861],{},[545,2859,2860],{},"include",[545,2862,2863],{},"exclude",[638,2865,2866,2867,919],{},"Route-style filters on turn paths (",[545,2868,2869],{},"\u002Fsessions\u002F*\u002Fturns\u002F*",[612,2871,472],{"id":2872},"tail-sampling",[526,2874,2875,2876,2878],{},"Use ",[545,2877,2797],{}," to force-keep turns with failed tools or high token usage:",[682,2880,2882],{"className":771,"code":2881,"filename":767,"language":773,"meta":688,"style":688},"export default defineEvlogHook({\n  drain: createAxiomDrain(),\n  keep: (ctx) => {\n    const ai = ctx.context.ai as {\n      inputTokens?: number\n      outputTokens?: number\n      tools?: Array\u003C{ success: boolean }>\n    } | undefined\n    const totalTokens = (ai?.inputTokens ?? 0) + (ai?.outputTokens ?? 0)\n    if (totalTokens > 10_000) ctx.shouldKeep = true\n    if (ai?.tools?.some(t => !t.success)) ctx.shouldKeep = true\n  },\n})\n",[545,2883,2884,2896,2908,2925,2951,2962,2971,2995,3006,3049,3079,3125,3129],{"__ignoreMap":688},[692,2885,2886,2888,2890,2892,2894],{"class":694,"line":695},[692,2887,837],{"class":780},[692,2889,840],{"class":780},[692,2891,789],{"class":843},[692,2893,846],{"class":788},[692,2895,849],{"class":784},[692,2897,2898,2900,2902,2904,2906],{"class":694,"line":806},[692,2899,891],{"class":855},[692,2901,768],{"class":784},[692,2903,813],{"class":843},[692,2905,898],{"class":788},[692,2907,901],{"class":784},[692,2909,2910,2913,2915,2917,2919,2921,2923],{"class":694,"line":827},[692,2911,2912],{"class":843},"  keep",[692,2914,768],{"class":784},[692,2916,912],{"class":784},[692,2918,916],{"class":915},[692,2920,919],{"class":784},[692,2922,923],{"class":922},[692,2924,926],{"class":784},[692,2926,2927,2929,2932,2934,2937,2939,2942,2944,2946,2949],{"class":694,"line":834},[692,2928,1184],{"class":922},[692,2930,2931],{"class":788}," ai",[692,2933,946],{"class":784},[692,2935,2936],{"class":788}," ctx",[692,2938,935],{"class":784},[692,2940,2941],{"class":788},"context",[692,2943,935],{"class":784},[692,2945,1776],{"class":788},[692,2947,2948],{"class":780}," as",[692,2950,926],{"class":784},[692,2952,2953,2956,2959],{"class":694,"line":852},[692,2954,2955],{"class":855},"      inputTokens",[692,2957,2958],{"class":784},"?:",[692,2960,2961],{"class":698}," number\n",[692,2963,2964,2967,2969],{"class":694,"line":888},[692,2965,2966],{"class":855},"      outputTokens",[692,2968,2958],{"class":784},[692,2970,2961],{"class":698},[692,2972,2973,2976,2978,2981,2984,2987,2989,2992],{"class":694,"line":904},[692,2974,2975],{"class":855},"      tools",[692,2977,2958],{"class":784},[692,2979,2980],{"class":698}," Array",[692,2982,2983],{"class":784},"\u003C{",[692,2985,2986],{"class":855}," success",[692,2988,768],{"class":784},[692,2990,2991],{"class":698}," boolean",[692,2993,2994],{"class":784}," }>\n",[692,2996,2997,3000,3003],{"class":694,"line":929},[692,2998,2999],{"class":784},"    }",[692,3001,3002],{"class":784}," |",[692,3004,3005],{"class":698}," undefined\n",[692,3007,3008,3010,3013,3015,3017,3019,3022,3024,3027,3029,3032,3035,3037,3039,3041,3043,3045,3047],{"class":694,"line":962},[692,3009,1184],{"class":922},[692,3011,3012],{"class":788}," totalTokens",[692,3014,946],{"class":784},[692,3016,912],{"class":855},[692,3018,1776],{"class":788},[692,3020,3021],{"class":784},"?.",[692,3023,1823],{"class":788},[692,3025,3026],{"class":784}," ??",[692,3028,1567],{"class":1441},[692,3030,3031],{"class":855},") ",[692,3033,3034],{"class":784},"+",[692,3036,912],{"class":855},[692,3038,1776],{"class":788},[692,3040,3021],{"class":784},[692,3042,1840],{"class":788},[692,3044,3026],{"class":784},[692,3046,1567],{"class":1441},[692,3048,974],{"class":855},[692,3050,3051,3054,3056,3059,3062,3065,3067,3069,3071,3074,3076],{"class":694,"line":968},[692,3052,3053],{"class":780},"    if",[692,3055,912],{"class":855},[692,3057,3058],{"class":788},"totalTokens",[692,3060,3061],{"class":784}," >",[692,3063,3064],{"class":1441}," 10_000",[692,3066,3031],{"class":855},[692,3068,916],{"class":788},[692,3070,935],{"class":784},[692,3072,3073],{"class":788},"shouldKeep",[692,3075,946],{"class":784},[692,3077,3078],{"class":2628}," true\n",[692,3080,3081,3083,3085,3087,3089,3091,3093,3096,3098,3101,3103,3106,3108,3110,3112,3115,3117,3119,3121,3123],{"class":694,"line":1219},[692,3082,3053],{"class":780},[692,3084,912],{"class":855},[692,3086,1776],{"class":788},[692,3088,3021],{"class":784},[692,3090,1878],{"class":788},[692,3092,3021],{"class":784},[692,3094,3095],{"class":843},"some",[692,3097,846],{"class":855},[692,3099,3100],{"class":915},"t",[692,3102,923],{"class":922},[692,3104,3105],{"class":784}," !",[692,3107,3100],{"class":788},[692,3109,935],{"class":784},[692,3111,1927],{"class":788},[692,3113,3114],{"class":855},")) ",[692,3116,916],{"class":788},[692,3118,935],{"class":784},[692,3120,3073],{"class":788},[692,3122,946],{"class":784},[692,3124,3078],{"class":2628},[692,3126,3127],{"class":694,"line":1287},[692,3128,965],{"class":784},[692,3130,3131,3133],{"class":694,"line":1296},[692,3132,971],{"class":784},[692,3134,974],{"class":788},[612,3136,3138],{"id":3137},"audit-logs","Audit logs",[526,3140,3141,3142,3144,3145,3148,3149,3152,3153,3156,3157,1336,3159,935],{},"Combine with ",[529,3143,373],{"href":379},": register ",[545,3146,3147],{},"auditEnricher()"," via ",[545,3150,3151],{},"init.plugins"," or a global plugin, and call ",[545,3154,3155],{},"log.audit()"," inside tools when a human approval gate fires. Tool rejections surface on ",[545,3158,2401],{},[545,3160,3161],{},"status: \"rejected\"",[612,3163,3165],{"id":3164},"run-locally","Run locally",[682,3167,3169],{"className":684,"code":3168,"language":687,"meta":688,"style":688},"git clone https:\u002F\u002Fgithub.com\u002FHugoRCD\u002Fevlog\ncd evlog\npnpm install\npnpm example eve\n",[545,3170,3171,3182,3190,3197],{"__ignoreMap":688},[692,3172,3173,3176,3179],{"class":694,"line":695},[692,3174,3175],{"class":698},"git",[692,3177,3178],{"class":701}," clone",[692,3180,3181],{"class":701}," https:\u002F\u002Fgithub.com\u002FHugoRCD\u002Fevlog\n",[692,3183,3184,3187],{"class":694,"line":806},[692,3185,3186],{"class":843},"cd",[692,3188,3189],{"class":701}," evlog\n",[692,3191,3192,3194],{"class":694,"line":827},[692,3193,686],{"class":698},[692,3195,3196],{"class":701}," install\n",[692,3198,3199,3201,3204],{"class":694,"line":834},[692,3200,686],{"class":698},[692,3202,3203],{"class":701}," example",[692,3205,708],{"class":701},[526,3207,3208,3209,3212,3213,3216,3217,3220,3221,3227],{},"The ",[545,3210,3211],{},"examples\u002Feve"," project is a ",[536,3214,3215],{},"support refund copilot"," (Clearbill SaaS): lookup customer → lookup order → issue refund, with eve approvals when amount > $100. 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