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This enables:",[545,546,547,560,570],"ul",{},[548,549,550,554,555,559],"li",{},[551,552,553],"strong",{},"AI agent integration"," - point a skill to ",[556,557,558],"code",{},".evlog\u002Flogs\u002F"," to parse structured logs for debugging and pattern analysis",[548,561,562,565,566,569],{},[551,563,564],{},"Local dev debugging"," - persistent log history without scrolling the terminal (",[556,567,568],{},"tail -f .evlog\u002Flogs\u002F2026-03-14.jsonl",")",[548,571,572,575],{},[551,573,574],{},"Production backup"," - combine with a network drain (Axiom, OTLP) for local fallback",[577,578,581,584,608],"prompt",{":actions":579,"description":580,"icon":209},"[\"copy\",\"cursor\",\"claude\"]","Add the file system drain adapter",[541,582,583],{},"Add the file system drain adapter to write evlog wide events locally as NDJSON files.",[585,586,587,590,593,596,599,602,605],"ol",{},[548,588,589],{},"Identify which framework I'm using and follow its evlog integration pattern",[548,591,592],{},"Install evlog if not already installed",[548,594,595],{},"Import createFsDrain from 'evlog\u002Ffs'",[548,597,598],{},"Wire createFsDrain() into my framework's drain configuration",[548,600,601],{},"Logs are written to .evlog\u002Flogs\u002F by default (one file per day, auto .gitignore)",[548,603,604],{},"Optionally configure dir, maxFiles, maxSizePerFile, or pretty options",[548,606,607],{},"Test by triggering a request and checking .evlog\u002Flogs\u002F*.jsonl",[541,609,610,611,617,618],{},"Adapter docs: ",[612,613,614],"a",{"href":614,"rel":615},"https:\u002F\u002Fwww.evlog.dev\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Ffs",[616],"nofollow","\nFramework setup: ",[612,619,620],{"href":620,"rel":621},"https:\u002F\u002Fwww.evlog.dev\u002Fintegrate\u002Fframeworks\u002Foverview",[616],[623,624,20],"h2",{"id":625},"installation",[541,627,628],{},"The File System adapter comes bundled with evlog:",[630,631,637],"pre",{"className":632,"code":633,"filename":634,"language":635,"meta":636,"style":636},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { createFsDrain } from 'evlog\u002Ffs'\n","src\u002Findex.ts","typescript","",[556,638,639],{"__ignoreMap":636},[640,641,644,648,652,656,659,662,665,669],"span",{"class":642,"line":643},"line",1,[640,645,647],{"class":646},"s7zQu","import",[640,649,651],{"class":650},"sMK4o"," {",[640,653,655],{"class":654},"sTEyZ"," createFsDrain",[640,657,658],{"class":650}," }",[640,660,661],{"class":646}," from",[640,663,664],{"class":650}," '",[640,666,668],{"class":667},"sfazB","evlog\u002Ffs",[640,670,671],{"class":650},"'\n",[623,673,25],{"id":674},"quick-start",[541,676,677],{},"No credentials or environment variables needed. Just wire the drain to your framework:",[679,680,681,795,926,943,1005,1059,1118,1172,1225],"code-group",{},[630,682,685],{"className":632,"code":683,"filename":684,"language":635,"meta":636,"style":636},"\u002F\u002F server\u002Fplugins\u002Fevlog-drain.ts\nimport { createFsDrain } from 'evlog\u002Ffs'\n\nexport default defineNitroPlugin((nitroApp) => {\n  nitroApp.hooks.hook('evlog:drain', createFsDrain())\n})\n","Nuxt \u002F Nitro",[556,686,687,693,712,719,750,786],{"__ignoreMap":636},[640,688,689],{"class":642,"line":643},[640,690,692],{"class":691},"sHwdD","\u002F\u002F server\u002Fplugins\u002Fevlog-drain.ts\n",[640,694,696,698,700,702,704,706,708,710],{"class":642,"line":695},2,[640,697,647],{"class":646},[640,699,651],{"class":650},[640,701,655],{"class":654},[640,703,658],{"class":650},[640,705,661],{"class":646},[640,707,664],{"class":650},[640,709,668],{"class":667},[640,711,671],{"class":650},[640,713,715],{"class":642,"line":714},3,[640,716,718],{"emptyLinePlaceholder":717},true,"\n",[640,720,722,725,728,732,735,737,741,743,747],{"class":642,"line":721},4,[640,723,724],{"class":646},"export",[640,726,727],{"class":646}," default",[640,729,731],{"class":730},"s2Zo4"," defineNitroPlugin",[640,733,734],{"class":654},"(",[640,736,734],{"class":650},[640,738,740],{"class":739},"sHdIc","nitroApp",[640,742,569],{"class":650},[640,744,746],{"class":745},"spNyl"," =>",[640,748,749],{"class":650}," {\n",[640,751,753,756,759,762,764,767,770,773,776,778,781,783],{"class":642,"line":752},5,[640,754,755],{"class":654},"  nitroApp",[640,757,758],{"class":650},".",[640,760,761],{"class":654},"hooks",[640,763,758],{"class":650},[640,765,766],{"class":730},"hook",[640,768,734],{"class":769},"swJcz",[640,771,772],{"class":650},"'",[640,774,775],{"class":667},"evlog:drain",[640,777,772],{"class":650},[640,779,780],{"class":650},",",[640,782,655],{"class":730},[640,784,785],{"class":769},"())\n",[640,787,789,792],{"class":642,"line":788},6,[640,790,791],{"class":650},"}",[640,793,794],{"class":654},")\n",[630,796,798],{"className":632,"code":797,"filename":235,"language":635,"meta":636,"style":636},"\u002F\u002F lib\u002Fevlog.ts — Node.js routes only; keep evlog\u002Ffs out of root instrumentation.ts\nimport { createEvlog } from 'evlog\u002Fnext'\nimport { createFsDrain } from 'evlog\u002Ffs'\n\nexport const { withEvlog, useLogger, log, createError } = createEvlog({\n  service: 'my-app',\n  drain: createFsDrain(),\n})\n",[556,799,800,805,825,843,847,886,904,919],{"__ignoreMap":636},[640,801,802],{"class":642,"line":643},[640,803,804],{"class":691},"\u002F\u002F lib\u002Fevlog.ts — Node.js routes only; keep evlog\u002Ffs out of root instrumentation.ts\n",[640,806,807,809,811,814,816,818,820,823],{"class":642,"line":695},[640,808,647],{"class":646},[640,810,651],{"class":650},[640,812,813],{"class":654}," createEvlog",[640,815,658],{"class":650},[640,817,661],{"class":646},[640,819,664],{"class":650},[640,821,822],{"class":667},"evlog\u002Fnext",[640,824,671],{"class":650},[640,826,827,829,831,833,835,837,839,841],{"class":642,"line":714},[640,828,647],{"class":646},[640,830,651],{"class":650},[640,832,655],{"class":654},[640,834,658],{"class":650},[640,836,661],{"class":646},[640,838,664],{"class":650},[640,840,668],{"class":667},[640,842,671],{"class":650},[640,844,845],{"class":642,"line":721},[640,846,718],{"emptyLinePlaceholder":717},[640,848,849,851,854,856,859,861,864,866,869,871,874,876,879,881,883],{"class":642,"line":752},[640,850,724],{"class":646},[640,852,853],{"class":745}," const",[640,855,651],{"class":650},[640,857,858],{"class":654}," withEvlog",[640,860,780],{"class":650},[640,862,863],{"class":654}," useLogger",[640,865,780],{"class":650},[640,867,868],{"class":654}," log",[640,870,780],{"class":650},[640,872,873],{"class":654}," createError ",[640,875,791],{"class":650},[640,877,878],{"class":650}," =",[640,880,813],{"class":730},[640,882,734],{"class":654},[640,884,885],{"class":650},"{\n",[640,887,888,891,894,896,899,901],{"class":642,"line":788},[640,889,890],{"class":769},"  service",[640,892,893],{"class":650},":",[640,895,664],{"class":650},[640,897,898],{"class":667},"my-app",[640,900,772],{"class":650},[640,902,903],{"class":650},",\n",[640,905,907,910,912,914,917],{"class":642,"line":906},7,[640,908,909],{"class":769},"  drain",[640,911,893],{"class":650},[640,913,655],{"class":730},[640,915,916],{"class":654},"()",[640,918,903],{"class":650},[640,920,922,924],{"class":642,"line":921},8,[640,923,791],{"class":650},[640,925,794],{"class":654},[927,928,930,931,934,935,938,939,942],"callout",{"color":929,"icon":13},"info","The FS adapter requires Node.js (",[556,932,933],{},"node:fs","). On the Edge runtime, or when its directory is not writable, it logs a one-time ",[556,936,937],{},"[evlog\u002Ffs]"," warning and skips writes — so attaching it on a serverless host is safe but pointless, since only the temp directory is writable there and it does not outlive the instance. Use ",[556,940,941],{},"evlog\u002Fmemory"," or an HTTP adapter for those.",[630,944,946],{"className":632,"code":945,"filename":265,"language":635,"meta":636,"style":636},"import { createFsDrain } from 'evlog\u002Ffs'\n\napp.use(evlog({ drain: createFsDrain() }))\n",[556,947,948,966,970],{"__ignoreMap":636},[640,949,950,952,954,956,958,960,962,964],{"class":642,"line":643},[640,951,647],{"class":646},[640,953,651],{"class":650},[640,955,655],{"class":654},[640,957,658],{"class":650},[640,959,661],{"class":646},[640,961,664],{"class":650},[640,963,668],{"class":667},[640,965,671],{"class":650},[640,967,968],{"class":642,"line":695},[640,969,718],{"emptyLinePlaceholder":717},[640,971,972,975,977,980,982,985,987,990,993,995,997,1000,1002],{"class":642,"line":714},[640,973,974],{"class":654},"app",[640,976,758],{"class":650},[640,978,979],{"class":730},"use",[640,981,734],{"class":654},[640,983,984],{"class":730},"evlog",[640,986,734],{"class":654},[640,988,989],{"class":650},"{",[640,991,992],{"class":769}," drain",[640,994,893],{"class":650},[640,996,655],{"class":730},[640,998,999],{"class":654},"() ",[640,1001,791],{"class":650},[640,1003,1004],{"class":654},"))\n",[630,1006,1007],{"className":632,"code":945,"filename":260,"language":635,"meta":636,"style":636},[556,1008,1009,1027,1031],{"__ignoreMap":636},[640,1010,1011,1013,1015,1017,1019,1021,1023,1025],{"class":642,"line":643},[640,1012,647],{"class":646},[640,1014,651],{"class":650},[640,1016,655],{"class":654},[640,1018,658],{"class":650},[640,1020,661],{"class":646},[640,1022,664],{"class":650},[640,1024,668],{"class":667},[640,1026,671],{"class":650},[640,1028,1029],{"class":642,"line":695},[640,1030,718],{"emptyLinePlaceholder":717},[640,1032,1033,1035,1037,1039,1041,1043,1045,1047,1049,1051,1053,1055,1057],{"class":642,"line":714},[640,1034,974],{"class":654},[640,1036,758],{"class":650},[640,1038,979],{"class":730},[640,1040,734],{"class":654},[640,1042,984],{"class":730},[640,1044,734],{"class":654},[640,1046,989],{"class":650},[640,1048,992],{"class":769},[640,1050,893],{"class":650},[640,1052,655],{"class":730},[640,1054,999],{"class":654},[640,1056,791],{"class":650},[640,1058,1004],{"class":654},[630,1060,1062],{"className":632,"code":1061,"filename":270,"language":635,"meta":636,"style":636},"import { createFsDrain } from 'evlog\u002Ffs'\n\nawait app.register(evlog, { drain: createFsDrain() })\n",[556,1063,1064,1082,1086],{"__ignoreMap":636},[640,1065,1066,1068,1070,1072,1074,1076,1078,1080],{"class":642,"line":643},[640,1067,647],{"class":646},[640,1069,651],{"class":650},[640,1071,655],{"class":654},[640,1073,658],{"class":650},[640,1075,661],{"class":646},[640,1077,664],{"class":650},[640,1079,668],{"class":667},[640,1081,671],{"class":650},[640,1083,1084],{"class":642,"line":695},[640,1085,718],{"emptyLinePlaceholder":717},[640,1087,1088,1091,1094,1096,1099,1102,1104,1106,1108,1110,1112,1114,1116],{"class":642,"line":714},[640,1089,1090],{"class":646},"await",[640,1092,1093],{"class":654}," app",[640,1095,758],{"class":650},[640,1097,1098],{"class":730},"register",[640,1100,1101],{"class":654},"(evlog",[640,1103,780],{"class":650},[640,1105,651],{"class":650},[640,1107,992],{"class":769},[640,1109,893],{"class":650},[640,1111,655],{"class":730},[640,1113,999],{"class":654},[640,1115,791],{"class":650},[640,1117,794],{"class":654},[630,1119,1120],{"className":632,"code":945,"filename":275,"language":635,"meta":636,"style":636},[556,1121,1122,1140,1144],{"__ignoreMap":636},[640,1123,1124,1126,1128,1130,1132,1134,1136,1138],{"class":642,"line":643},[640,1125,647],{"class":646},[640,1127,651],{"class":650},[640,1129,655],{"class":654},[640,1131,658],{"class":650},[640,1133,661],{"class":646},[640,1135,664],{"class":650},[640,1137,668],{"class":667},[640,1139,671],{"class":650},[640,1141,1142],{"class":642,"line":695},[640,1143,718],{"emptyLinePlaceholder":717},[640,1145,1146,1148,1150,1152,1154,1156,1158,1160,1162,1164,1166,1168,1170],{"class":642,"line":714},[640,1147,974],{"class":654},[640,1149,758],{"class":650},[640,1151,979],{"class":730},[640,1153,734],{"class":654},[640,1155,984],{"class":730},[640,1157,734],{"class":654},[640,1159,989],{"class":650},[640,1161,992],{"class":769},[640,1163,893],{"class":650},[640,1165,655],{"class":730},[640,1167,999],{"class":654},[640,1169,791],{"class":650},[640,1171,1004],{"class":654},[630,1173,1175],{"className":632,"code":1174,"filename":255,"language":635,"meta":636,"style":636},"import { createFsDrain } from 'evlog\u002Ffs'\n\nEvlogModule.forRoot({ drain: createFsDrain() })\n",[556,1176,1177,1195,1199],{"__ignoreMap":636},[640,1178,1179,1181,1183,1185,1187,1189,1191,1193],{"class":642,"line":643},[640,1180,647],{"class":646},[640,1182,651],{"class":650},[640,1184,655],{"class":654},[640,1186,658],{"class":650},[640,1188,661],{"class":646},[640,1190,664],{"class":650},[640,1192,668],{"class":667},[640,1194,671],{"class":650},[640,1196,1197],{"class":642,"line":695},[640,1198,718],{"emptyLinePlaceholder":717},[640,1200,1201,1204,1206,1209,1211,1213,1215,1217,1219,1221,1223],{"class":642,"line":714},[640,1202,1203],{"class":654},"EvlogModule",[640,1205,758],{"class":650},[640,1207,1208],{"class":730},"forRoot",[640,1210,734],{"class":654},[640,1212,989],{"class":650},[640,1214,992],{"class":769},[640,1216,893],{"class":650},[640,1218,655],{"class":730},[640,1220,999],{"class":654},[640,1222,791],{"class":650},[640,1224,794],{"class":654},[630,1226,1228],{"className":632,"code":1227,"filename":290,"language":635,"meta":636,"style":636},"import { createFsDrain } from 'evlog\u002Ffs'\n\ninitLogger({ drain: createFsDrain() })\n",[556,1229,1230,1248,1252],{"__ignoreMap":636},[640,1231,1232,1234,1236,1238,1240,1242,1244,1246],{"class":642,"line":643},[640,1233,647],{"class":646},[640,1235,651],{"class":650},[640,1237,655],{"class":654},[640,1239,658],{"class":650},[640,1241,661],{"class":646},[640,1243,664],{"class":650},[640,1245,668],{"class":667},[640,1247,671],{"class":650},[640,1249,1250],{"class":642,"line":695},[640,1251,718],{"emptyLinePlaceholder":717},[640,1253,1254,1257,1259,1261,1263,1265,1267,1269,1271],{"class":642,"line":714},[640,1255,1256],{"class":730},"initLogger",[640,1258,734],{"class":654},[640,1260,989],{"class":650},[640,1262,992],{"class":769},[640,1264,893],{"class":650},[640,1266,655],{"class":730},[640,1268,999],{"class":654},[640,1270,791],{"class":650},[640,1272,794],{"class":654},[541,1274,1275,1276,1278],{},"Logs start appearing in ",[556,1277,558],{}," immediately.",[623,1280,1282],{"id":1281},"file-structure","File Structure",[630,1284,1290],{"className":1285,"code":1287,"filename":1288,"language":1289,"meta":636},[1286],"language-text",".evlog\u002F\n  logs\u002F\n    2026-03-14.jsonl    ← one file per day\n    2026-03-13.jsonl\n    2026-03-12.jsonl\n",".evlog\u002Flogs directory layout","text",[556,1291,1287],{"__ignoreMap":636},[541,1293,1294,1295,1298],{},"Each ",[556,1296,1297],{},".jsonl"," file contains one JSON object per line (NDJSON format), making it easy to parse, grep, and stream.",[927,1300,1303,1304,1307,1308,1311,1312,1315],{"color":1301,"icon":1302},"success","i-lucide-git-branch","A ",[556,1305,1306],{},".gitignore"," is automatically created on first write, inside the ",[556,1309,1310],{},".evlog\u002F"," ancestor directory when present or in the configured ",[556,1313,1314],{},"dir"," otherwise. Log files are never committed to version control.",[623,1317,504],{"id":1318},"configuration",[1320,1321,336],"h3",{"id":1322},"options",[1324,1325,1326,1345],"table",{},[1327,1328,1329],"thead",{},[1330,1331,1332,1336,1339,1342],"tr",{},[1333,1334,1335],"th",{},"Option",[1333,1337,1338],{},"Type",[1333,1340,1341],{},"Default",[1333,1343,1344],{},"Description",[1346,1347,1348,1368,1388,1406],"tbody",{},[1330,1349,1350,1355,1360,1365],{},[1351,1352,1353],"td",{},[556,1354,1314],{},[1351,1356,1357],{},[556,1358,1359],{},"string",[1351,1361,1362],{},[556,1363,1364],{},"'.evlog\u002Flogs'",[1351,1366,1367],{},"Directory for log files",[1330,1369,1370,1375,1380,1385],{},[1351,1371,1372],{},[556,1373,1374],{},"maxFiles",[1351,1376,1377],{},[556,1378,1379],{},"number",[1351,1381,1382],{},[556,1383,1384],{},"undefined",[1351,1386,1387],{},"Max files to keep (auto-deletes oldest)",[1330,1389,1390,1395,1399,1403],{},[1351,1391,1392],{},[556,1393,1394],{},"maxSizePerFile",[1351,1396,1397],{},[556,1398,1379],{},[1351,1400,1401],{},[556,1402,1384],{},[1351,1404,1405],{},"Max bytes per file before rotating",[1330,1407,1408,1413,1418,1423],{},[1351,1409,1410],{},[556,1411,1412],{},"pretty",[1351,1414,1415],{},[556,1416,1417],{},"boolean",[1351,1419,1420],{},[556,1421,1422],{},"false",[1351,1424,1425],{},"Pretty-print JSON (multi-line, readable)",[1320,1427,1429],{"id":1428},"examples","Examples",[630,1431,1434],{"className":632,"code":1432,"filename":1433,"language":635,"meta":636,"style":636},"\u002F\u002F Keep only the last 7 days of logs\ncreateFsDrain({ maxFiles: 7 })\n\n\u002F\u002F Rotate files at 10MB, keep 30 files\ncreateFsDrain({\n  maxSizePerFile: 10 * 1024 * 1024,\n  maxFiles: 30,\n})\n\n\u002F\u002F Pretty-print for human reading\ncreateFsDrain({ pretty: true })\n\n\u002F\u002F Custom directory\ncreateFsDrain({ dir: '\u002Fvar\u002Flog\u002Fmyapp' })\n","server\u002Fplugins\u002Fevlog-drain.ts",[556,1435,1436,1441,1463,1467,1472,1480,1502,1514,1520,1525,1531,1553,1558,1564],{"__ignoreMap":636},[640,1437,1438],{"class":642,"line":643},[640,1439,1440],{"class":691},"\u002F\u002F Keep only the last 7 days of logs\n",[640,1442,1443,1446,1448,1450,1453,1455,1459,1461],{"class":642,"line":695},[640,1444,1445],{"class":730},"createFsDrain",[640,1447,734],{"class":654},[640,1449,989],{"class":650},[640,1451,1452],{"class":769}," maxFiles",[640,1454,893],{"class":650},[640,1456,1458],{"class":1457},"sbssI"," 7",[640,1460,658],{"class":650},[640,1462,794],{"class":654},[640,1464,1465],{"class":642,"line":714},[640,1466,718],{"emptyLinePlaceholder":717},[640,1468,1469],{"class":642,"line":721},[640,1470,1471],{"class":691},"\u002F\u002F Rotate files at 10MB, keep 30 files\n",[640,1473,1474,1476,1478],{"class":642,"line":752},[640,1475,1445],{"class":730},[640,1477,734],{"class":654},[640,1479,885],{"class":650},[640,1481,1482,1485,1487,1490,1493,1496,1498,1500],{"class":642,"line":788},[640,1483,1484],{"class":769},"  maxSizePerFile",[640,1486,893],{"class":650},[640,1488,1489],{"class":1457}," 10",[640,1491,1492],{"class":650}," *",[640,1494,1495],{"class":1457}," 1024",[640,1497,1492],{"class":650},[640,1499,1495],{"class":1457},[640,1501,903],{"class":650},[640,1503,1504,1507,1509,1512],{"class":642,"line":906},[640,1505,1506],{"class":769},"  maxFiles",[640,1508,893],{"class":650},[640,1510,1511],{"class":1457}," 30",[640,1513,903],{"class":650},[640,1515,1516,1518],{"class":642,"line":921},[640,1517,791],{"class":650},[640,1519,794],{"class":654},[640,1521,1523],{"class":642,"line":1522},9,[640,1524,718],{"emptyLinePlaceholder":717},[640,1526,1528],{"class":642,"line":1527},10,[640,1529,1530],{"class":691},"\u002F\u002F Pretty-print for human reading\n",[640,1532,1534,1536,1538,1540,1543,1545,1549,1551],{"class":642,"line":1533},11,[640,1535,1445],{"class":730},[640,1537,734],{"class":654},[640,1539,989],{"class":650},[640,1541,1542],{"class":769}," pretty",[640,1544,893],{"class":650},[640,1546,1548],{"class":1547},"sfNiH"," true",[640,1550,658],{"class":650},[640,1552,794],{"class":654},[640,1554,1556],{"class":642,"line":1555},12,[640,1557,718],{"emptyLinePlaceholder":717},[640,1559,1561],{"class":642,"line":1560},13,[640,1562,1563],{"class":691},"\u002F\u002F Custom directory\n",[640,1565,1567,1569,1571,1573,1576,1578,1580,1583,1585,1587],{"class":642,"line":1566},14,[640,1568,1445],{"class":730},[640,1570,734],{"class":654},[640,1572,989],{"class":650},[640,1574,1575],{"class":769}," dir",[640,1577,893],{"class":650},[640,1579,664],{"class":650},[640,1581,1582],{"class":667},"\u002Fvar\u002Flog\u002Fmyapp",[640,1584,772],{"class":650},[640,1586,658],{"class":650},[640,1588,794],{"class":654},[1320,1590,1592],{"id":1591},"file-rotation","File Rotation",[541,1594,1595,1596,1599,1600,1602],{},"By default, a new file is created each day (",[556,1597,1598],{},"2026-03-14.jsonl","). When ",[556,1601,1394],{}," is set, the adapter creates suffixed files when the current file exceeds the limit:",[630,1604,1608],{"className":1605,"code":1606,"filename":1607,"language":1289,"meta":636},[1286],".evlog\u002Flogs\u002F\n  2026-03-14.jsonl      ← base file (full)\n  2026-03-14.1.jsonl    ← first rotation\n  2026-03-14.2.jsonl    ← second rotation\n","Rotated log files",[556,1609,1606],{"__ignoreMap":636},[1320,1611,1613],{"id":1612},"cleanup","Cleanup",[541,1615,1616,1617,1619,1620,1622],{},"When ",[556,1618,1374],{}," is set, the adapter automatically deletes the oldest ",[556,1621,1297],{}," files after each write, keeping only the most recent files.",[623,1624,1626],{"id":1625},"combining-with-network-drains","Combining with Network Drains",[541,1628,1629],{},"Use the FS adapter alongside a network drain for local backup:",[630,1631,1633],{"className":632,"code":1632,"filename":1433,"language":635,"meta":636,"style":636},"import { createFsDrain } from 'evlog\u002Ffs'\nimport { createAxiomDrain } from 'evlog\u002Faxiom'\n\nconst fs = createFsDrain({ maxFiles: 7 })\nconst axiom = createAxiomDrain()\n\nconst drain = async (ctx) => {\n  await Promise.allSettled([fs(ctx), axiom(ctx)])\n}\n",[556,1634,1635,1653,1673,1677,1704,1718,1722,1746,1784],{"__ignoreMap":636},[640,1636,1637,1639,1641,1643,1645,1647,1649,1651],{"class":642,"line":643},[640,1638,647],{"class":646},[640,1640,651],{"class":650},[640,1642,655],{"class":654},[640,1644,658],{"class":650},[640,1646,661],{"class":646},[640,1648,664],{"class":650},[640,1650,668],{"class":667},[640,1652,671],{"class":650},[640,1654,1655,1657,1659,1662,1664,1666,1668,1671],{"class":642,"line":695},[640,1656,647],{"class":646},[640,1658,651],{"class":650},[640,1660,1661],{"class":654}," createAxiomDrain",[640,1663,658],{"class":650},[640,1665,661],{"class":646},[640,1667,664],{"class":650},[640,1669,1670],{"class":667},"evlog\u002Faxiom",[640,1672,671],{"class":650},[640,1674,1675],{"class":642,"line":714},[640,1676,718],{"emptyLinePlaceholder":717},[640,1678,1679,1682,1685,1688,1690,1692,1694,1696,1698,1700,1702],{"class":642,"line":721},[640,1680,1681],{"class":745},"const",[640,1683,1684],{"class":654}," fs ",[640,1686,1687],{"class":650},"=",[640,1689,655],{"class":730},[640,1691,734],{"class":654},[640,1693,989],{"class":650},[640,1695,1452],{"class":769},[640,1697,893],{"class":650},[640,1699,1458],{"class":1457},[640,1701,658],{"class":650},[640,1703,794],{"class":654},[640,1705,1706,1708,1711,1713,1715],{"class":642,"line":752},[640,1707,1681],{"class":745},[640,1709,1710],{"class":654}," axiom ",[640,1712,1687],{"class":650},[640,1714,1661],{"class":730},[640,1716,1717],{"class":654},"()\n",[640,1719,1720],{"class":642,"line":788},[640,1721,718],{"emptyLinePlaceholder":717},[640,1723,1724,1726,1729,1731,1734,1737,1740,1742,1744],{"class":642,"line":906},[640,1725,1681],{"class":745},[640,1727,1728],{"class":654}," drain ",[640,1730,1687],{"class":650},[640,1732,1733],{"class":745}," async",[640,1735,1736],{"class":650}," (",[640,1738,1739],{"class":739},"ctx",[640,1741,569],{"class":650},[640,1743,746],{"class":745},[640,1745,749],{"class":650},[640,1747,1748,1751,1755,1757,1760,1763,1766,1768,1770,1772,1774,1777,1779,1781],{"class":642,"line":921},[640,1749,1750],{"class":646},"  await",[640,1752,1754],{"class":1753},"sBMFI"," Promise",[640,1756,758],{"class":650},[640,1758,1759],{"class":730},"allSettled",[640,1761,1762],{"class":769},"([",[640,1764,1765],{"class":730},"fs",[640,1767,734],{"class":769},[640,1769,1739],{"class":654},[640,1771,569],{"class":769},[640,1773,780],{"class":650},[640,1775,1776],{"class":730}," axiom",[640,1778,734],{"class":769},[640,1780,1739],{"class":654},[640,1782,1783],{"class":769},")])\n",[640,1785,1786],{"class":642,"line":1522},[640,1787,1788],{"class":650},"}\n",[623,1790,1792],{"id":1791},"querying-logs","Querying Logs",[1320,1794,1796],{"id":1795},"stream-in-real-time","Stream in real-time",[630,1798,1803],{"className":1799,"code":1800,"filename":1801,"language":1802,"meta":636,"style":636},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","tail -f .evlog\u002Flogs\u002F2026-03-14.jsonl\n","Terminal","bash",[556,1804,1805],{"__ignoreMap":636},[640,1806,1807,1810,1813],{"class":642,"line":643},[640,1808,1809],{"class":1753},"tail",[640,1811,1812],{"class":667}," -f",[640,1814,1815],{"class":667}," .evlog\u002Flogs\u002F2026-03-14.jsonl\n",[1320,1817,1819],{"id":1818},"search-with-jq","Search with jq",[630,1821,1823],{"className":1799,"code":1822,"filename":1801,"language":1802,"meta":636,"style":636},"# Find errors\ncat .evlog\u002Flogs\u002F2026-03-14.jsonl | jq 'select(.level == \"error\")'\n\n# Slow requests (over 1s)\ncat .evlog\u002Flogs\u002F2026-03-14.jsonl | jq 'select(.durationMs > 1000)'\n\n# Requests by path\ncat .evlog\u002Flogs\u002F2026-03-14.jsonl | jq 'select(.path == \"\u002Fapi\u002Fcheckout\")'\n",[556,1824,1825,1830,1851,1855,1860,1877,1881,1886],{"__ignoreMap":636},[640,1826,1827],{"class":642,"line":643},[640,1828,1829],{"class":691},"# Find errors\n",[640,1831,1832,1835,1838,1841,1844,1846,1849],{"class":642,"line":695},[640,1833,1834],{"class":1753},"cat",[640,1836,1837],{"class":667}," .evlog\u002Flogs\u002F2026-03-14.jsonl",[640,1839,1840],{"class":650}," |",[640,1842,1843],{"class":1753}," jq",[640,1845,664],{"class":650},[640,1847,1848],{"class":667},"select(.level == \"error\")",[640,1850,671],{"class":650},[640,1852,1853],{"class":642,"line":714},[640,1854,718],{"emptyLinePlaceholder":717},[640,1856,1857],{"class":642,"line":721},[640,1858,1859],{"class":691},"# Slow requests (over 1s)\n",[640,1861,1862,1864,1866,1868,1870,1872,1875],{"class":642,"line":752},[640,1863,1834],{"class":1753},[640,1865,1837],{"class":667},[640,1867,1840],{"class":650},[640,1869,1843],{"class":1753},[640,1871,664],{"class":650},[640,1873,1874],{"class":667},"select(.durationMs > 1000)",[640,1876,671],{"class":650},[640,1878,1879],{"class":642,"line":788},[640,1880,718],{"emptyLinePlaceholder":717},[640,1882,1883],{"class":642,"line":906},[640,1884,1885],{"class":691},"# Requests by path\n",[640,1887,1888,1890,1892,1894,1896,1898,1901],{"class":642,"line":921},[640,1889,1834],{"class":1753},[640,1891,1837],{"class":667},[640,1893,1840],{"class":650},[640,1895,1843],{"class":1753},[640,1897,664],{"class":650},[640,1899,1900],{"class":667},"select(.path == \"\u002Fapi\u002Fcheckout\")",[640,1902,671],{"class":650},[1320,1904,1906],{"id":1905},"search-with-grep","Search with grep",[630,1908,1910],{"className":1799,"code":1909,"filename":1801,"language":1802,"meta":636,"style":636},"# Find all errors\ngrep '\"level\":\"error\"' .evlog\u002Flogs\u002F2026-03-14.jsonl\n\n# Find by request ID\ngrep 'req_abc123' .evlog\u002Flogs\u002F*.jsonl\n",[556,1911,1912,1917,1931,1935,1940],{"__ignoreMap":636},[640,1913,1914],{"class":642,"line":643},[640,1915,1916],{"class":691},"# Find all errors\n",[640,1918,1919,1922,1924,1927,1929],{"class":642,"line":695},[640,1920,1921],{"class":1753},"grep",[640,1923,664],{"class":650},[640,1925,1926],{"class":667},"\"level\":\"error\"",[640,1928,772],{"class":650},[640,1930,1815],{"class":667},[640,1932,1933],{"class":642,"line":714},[640,1934,718],{"emptyLinePlaceholder":717},[640,1936,1937],{"class":642,"line":721},[640,1938,1939],{"class":691},"# Find by request ID\n",[640,1941,1942,1944,1946,1949,1951,1954,1957],{"class":642,"line":752},[640,1943,1921],{"class":1753},[640,1945,664],{"class":650},[640,1947,1948],{"class":667},"req_abc123",[640,1950,772],{"class":650},[640,1952,1953],{"class":667}," .evlog\u002Flogs\u002F",[640,1955,1956],{"class":654},"*",[640,1958,1959],{"class":667},".jsonl\n",[623,1961,1963],{"id":1962},"direct-api-usage","Direct API Usage",[541,1965,1966],{},"For advanced use cases, use the lower-level write functions:",[630,1968,1970],{"className":632,"code":1969,"filename":634,"language":635,"meta":636,"style":636},"import { writeToFs, writeBatchToFs } from 'evlog\u002Ffs'\n\nawait writeToFs(event, {\n  dir: '.evlog\u002Flogs',\n  pretty: false,\n})\n\nawait writeBatchToFs(events, {\n  dir: '.evlog\u002Flogs',\n  pretty: false,\n})\n",[556,1971,1972,1996,2000,2013,2029,2041,2047,2051,2064,2078,2088],{"__ignoreMap":636},[640,1973,1974,1976,1978,1981,1983,1986,1988,1990,1992,1994],{"class":642,"line":643},[640,1975,647],{"class":646},[640,1977,651],{"class":650},[640,1979,1980],{"class":654}," writeToFs",[640,1982,780],{"class":650},[640,1984,1985],{"class":654}," writeBatchToFs",[640,1987,658],{"class":650},[640,1989,661],{"class":646},[640,1991,664],{"class":650},[640,1993,668],{"class":667},[640,1995,671],{"class":650},[640,1997,1998],{"class":642,"line":695},[640,1999,718],{"emptyLinePlaceholder":717},[640,2001,2002,2004,2006,2009,2011],{"class":642,"line":714},[640,2003,1090],{"class":646},[640,2005,1980],{"class":730},[640,2007,2008],{"class":654},"(event",[640,2010,780],{"class":650},[640,2012,749],{"class":650},[640,2014,2015,2018,2020,2022,2025,2027],{"class":642,"line":721},[640,2016,2017],{"class":769},"  dir",[640,2019,893],{"class":650},[640,2021,664],{"class":650},[640,2023,2024],{"class":667},".evlog\u002Flogs",[640,2026,772],{"class":650},[640,2028,903],{"class":650},[640,2030,2031,2034,2036,2039],{"class":642,"line":752},[640,2032,2033],{"class":769},"  pretty",[640,2035,893],{"class":650},[640,2037,2038],{"class":1547}," false",[640,2040,903],{"class":650},[640,2042,2043,2045],{"class":642,"line":788},[640,2044,791],{"class":650},[640,2046,794],{"class":654},[640,2048,2049],{"class":642,"line":906},[640,2050,718],{"emptyLinePlaceholder":717},[640,2052,2053,2055,2057,2060,2062],{"class":642,"line":921},[640,2054,1090],{"class":646},[640,2056,1985],{"class":730},[640,2058,2059],{"class":654},"(events",[640,2061,780],{"class":650},[640,2063,749],{"class":650},[640,2065,2066,2068,2070,2072,2074,2076],{"class":642,"line":1522},[640,2067,2017],{"class":769},[640,2069,893],{"class":650},[640,2071,664],{"class":650},[640,2073,2024],{"class":667},[640,2075,772],{"class":650},[640,2077,903],{"class":650},[640,2079,2080,2082,2084,2086],{"class":642,"line":1527},[640,2081,2033],{"class":769},[640,2083,893],{"class":650},[640,2085,2038],{"class":1547},[640,2087,903],{"class":650},[640,2089,2090,2092],{"class":642,"line":1533},[640,2091,791],{"class":650},[640,2093,794],{"class":654},[623,2095,2097],{"id":2096},"ai-log-analysis","AI Log Analysis",[541,2099,2100,2101,2107],{},"The file system drain pairs with the ",[612,2102,2103,2106],{"href":527},[556,2104,2105],{},"analyze-logs"," agent skill",". When installed, your AI assistant can read the NDJSON logs directly to debug errors, trace requests, and investigate performance without any external tools.",[623,2109,2111],{"id":2110},"next-steps","Next Steps",[545,2113,2114,2119,2125,2131],{},[548,2115,2116,2118],{},[612,2117,526],{"href":527}," - Let AI analyze your logs",[548,2120,2121,2124],{},[612,2122,2123],{"href":152},"Axiom Adapter"," - Send logs to Axiom for querying and dashboards",[548,2126,2127,2130],{},[612,2128,2129],{"href":496},"Pipeline"," - Add batching and retry to any drain",[548,2132,2133,2136],{},[612,2134,2135],{"href":491},"Custom Adapters"," - Build your own adapter",[2138,2139,2140],"style",{},"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 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