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The ",[515,532,533],{},"evlog\u002Ffs"," module also ships ",[536,537,538],"strong",{},"readers"," that let any Node tool replay or follow that history without hooking into the running app.",[541,542],"ndjson-tail",{},[544,545,548,551,609],"prompt",{":actions":546,"description":547,"icon":438},"[\"copy\",\"cursor\",\"claude\"]","Read or tail evlog NDJSON logs from disk",[506,549,550],{},"Build a script that consumes evlog's local NDJSON history (no app hook required).",[552,553,554,565,578,588,606],"ul",{},[555,556,557,558,560,561,564],"li",{},"Confirm the filesystem drain is wired up (",[515,559,533],{}," adapter writing NDJSON to ",[515,562,563],{},".evlog\u002Flogs\u002F*.jsonl",")",[555,566,567,568,571,572,574,575],{},"For replay: import ",[515,569,570],{},"readFsLogs"," from ",[515,573,533],{}," and iterate ",[515,576,577],{},"for await (const event of readFsLogs({ since, until, level, filter }))",[555,579,580,581,584,585],{},"For follow mode: import ",[515,582,583],{},"tailFsLogs"," and iterate the same way — it watches for new lines, handles rotation, and accepts an ",[515,586,587],{},"AbortSignal",[555,589,590,591,594,595,594,598,601,602,605],{},"Apply filters at read time (",[515,592,593],{},"level",", ",[515,596,597],{},"since",[515,599,600],{},"until",", custom ",[515,603,604],{},"filter"," predicate) instead of post-processing",[555,607,608],{},"Treat malformed lines as silently skipped (partial writes happen) — never crash the script on a bad line",[506,610,611,612],{},"Docs: ",[510,613,614],{"href":614,"rel":615},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Ffs-reader",[616],"nofollow",[618,619,621],"h2",{"id":620},"replay-history","Replay history",[623,624,629],"pre",{"className":625,"code":626,"language":627,"meta":628,"style":628},"language-ts shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { readFsLogs } from 'evlog\u002Ffs'\n\nfor await (const event of readFsLogs({ since: '2026-03-01', level: 'error' })) {\n  console.log(event.timestamp, event.action ?? event.message)\n}\n","ts","",[515,630,631,663,670,739,784],{"__ignoreMap":628},[632,633,636,640,644,648,651,654,657,660],"span",{"class":634,"line":635},"line",1,[632,637,639],{"class":638},"s7zQu","import",[632,641,643],{"class":642},"sMK4o"," {",[632,645,647],{"class":646},"sTEyZ"," readFsLogs",[632,649,650],{"class":642}," }",[632,652,653],{"class":638}," from",[632,655,656],{"class":642}," '",[632,658,533],{"class":659},"sfazB",[632,661,662],{"class":642},"'\n",[632,664,666],{"class":634,"line":665},2,[632,667,669],{"emptyLinePlaceholder":668},true,"\n",[632,671,673,676,679,682,686,689,692,695,698,701,705,708,710,713,716,719,722,724,726,729,731,733,736],{"class":634,"line":672},3,[632,674,675],{"class":638},"for",[632,677,678],{"class":638}," await",[632,680,681],{"class":646}," (",[632,683,685],{"class":684},"spNyl","const",[632,687,688],{"class":646}," event ",[632,690,691],{"class":642},"of",[632,693,647],{"class":694},"s2Zo4",[632,696,697],{"class":646},"(",[632,699,700],{"class":642},"{",[632,702,704],{"class":703},"swJcz"," since",[632,706,707],{"class":642},":",[632,709,656],{"class":642},[632,711,712],{"class":659},"2026-03-01",[632,714,715],{"class":642},"'",[632,717,718],{"class":642},",",[632,720,721],{"class":703}," level",[632,723,707],{"class":642},[632,725,656],{"class":642},[632,727,728],{"class":659},"error",[632,730,715],{"class":642},[632,732,650],{"class":642},[632,734,735],{"class":646},")) ",[632,737,738],{"class":642},"{\n",[632,740,742,745,748,751,753,756,758,761,763,766,768,771,774,776,778,781],{"class":634,"line":741},4,[632,743,744],{"class":646},"  console",[632,746,747],{"class":642},".",[632,749,750],{"class":694},"log",[632,752,697],{"class":703},[632,754,755],{"class":646},"event",[632,757,747],{"class":642},[632,759,760],{"class":646},"timestamp",[632,762,718],{"class":642},[632,764,765],{"class":646}," event",[632,767,747],{"class":642},[632,769,770],{"class":646},"action",[632,772,773],{"class":642}," ??",[632,775,765],{"class":646},[632,777,747],{"class":642},[632,779,780],{"class":646},"message",[632,782,783],{"class":703},")\n",[632,785,787],{"class":634,"line":786},5,[632,788,789],{"class":642},"}\n",[506,791,792,795],{},[515,793,794],{},"readFsLogs(options)"," walks the NDJSON files in chronological order, parses them line by line, and yields events that pass all filters. Files outside the date window are skipped entirely.",[797,798,311],"h3",{"id":799},"options",[801,802,803,819],"table",{},[804,805,806],"thead",{},[807,808,809,813,816],"tr",{},[810,811,812],"th",{},"Option",[810,814,815],{},"Type",[810,817,818],{},"Description",[820,821,822,841,858,873,887],"tbody",{},[807,823,824,830,835],{},[825,826,827],"td",{},[515,828,829],{},"dir",[825,831,832],{},[515,833,834],{},"string",[825,836,837,838,747],{},"Directory to read from. Default: ",[515,839,840],{},".evlog\u002Flogs",[807,842,843,847,852],{},[825,844,845],{},[515,846,597],{},[825,848,849],{},[515,850,851],{},"Date | string",[825,853,854,855,747],{},"Yield events with ",[515,856,857],{},"timestamp >= since",[807,859,860,864,868],{},[825,861,862],{},[515,863,600],{},[825,865,866],{},[515,867,851],{},[825,869,854,870,747],{},[515,871,872],{},"timestamp \u003C= until",[807,874,875,879,884],{},[825,876,877],{},[515,878,593],{},[825,880,881],{},[515,882,883],{},"LogLevel | LogLevel[]",[825,885,886],{},"Filter by event level.",[807,888,889,893,898],{},[825,890,891],{},[515,892,604],{},[825,894,895],{},[515,896,897],{},"(event) => boolean",[825,899,900],{},"Custom predicate.",[506,902,903],{},"Malformed lines (partial writes, manual edits) are silently skipped — your script never crashes on a bad line.",[618,905,907],{"id":906},"live-tail","Live tail",[623,909,911],{"className":625,"code":910,"language":627,"meta":628,"style":628},"import { tailFsLogs } from 'evlog\u002Ffs'\n\nconst ac = new AbortController()\nprocess.on('SIGINT', () => ac.abort())\n\nfor await (const event of tailFsLogs({ signal: ac.signal })) {\n  console.log('live:', event.action ?? event.message)\n}\n",[515,912,913,932,936,955,993,997,1037,1073],{"__ignoreMap":628},[632,914,915,917,919,922,924,926,928,930],{"class":634,"line":635},[632,916,639],{"class":638},[632,918,643],{"class":642},[632,920,921],{"class":646}," tailFsLogs",[632,923,650],{"class":642},[632,925,653],{"class":638},[632,927,656],{"class":642},[632,929,533],{"class":659},[632,931,662],{"class":642},[632,933,934],{"class":634,"line":665},[632,935,669],{"emptyLinePlaceholder":668},[632,937,938,940,943,946,949,952],{"class":634,"line":672},[632,939,685],{"class":684},[632,941,942],{"class":646}," ac ",[632,944,945],{"class":642},"=",[632,947,948],{"class":642}," new",[632,950,951],{"class":694}," AbortController",[632,953,954],{"class":646},"()\n",[632,956,957,960,962,965,967,969,972,974,976,979,982,985,987,990],{"class":634,"line":741},[632,958,959],{"class":646},"process",[632,961,747],{"class":642},[632,963,964],{"class":694},"on",[632,966,697],{"class":646},[632,968,715],{"class":642},[632,970,971],{"class":659},"SIGINT",[632,973,715],{"class":642},[632,975,718],{"class":642},[632,977,978],{"class":642}," ()",[632,980,981],{"class":684}," =>",[632,983,984],{"class":646}," ac",[632,986,747],{"class":642},[632,988,989],{"class":694},"abort",[632,991,992],{"class":646},"())\n",[632,994,995],{"class":634,"line":786},[632,996,669],{"emptyLinePlaceholder":668},[632,998,1000,1002,1004,1006,1008,1010,1012,1014,1016,1018,1021,1023,1025,1027,1030,1033,1035],{"class":634,"line":999},6,[632,1001,675],{"class":638},[632,1003,678],{"class":638},[632,1005,681],{"class":646},[632,1007,685],{"class":684},[632,1009,688],{"class":646},[632,1011,691],{"class":642},[632,1013,921],{"class":694},[632,1015,697],{"class":646},[632,1017,700],{"class":642},[632,1019,1020],{"class":703}," signal",[632,1022,707],{"class":642},[632,1024,984],{"class":646},[632,1026,747],{"class":642},[632,1028,1029],{"class":646},"signal ",[632,1031,1032],{"class":642},"}",[632,1034,735],{"class":646},[632,1036,738],{"class":642},[632,1038,1040,1042,1044,1046,1048,1050,1053,1055,1057,1059,1061,1063,1065,1067,1069,1071],{"class":634,"line":1039},7,[632,1041,744],{"class":646},[632,1043,747],{"class":642},[632,1045,750],{"class":694},[632,1047,697],{"class":703},[632,1049,715],{"class":642},[632,1051,1052],{"class":659},"live:",[632,1054,715],{"class":642},[632,1056,718],{"class":642},[632,1058,765],{"class":646},[632,1060,747],{"class":642},[632,1062,770],{"class":646},[632,1064,773],{"class":642},[632,1066,765],{"class":646},[632,1068,747],{"class":642},[632,1070,780],{"class":646},[632,1072,783],{"class":703},[632,1074,1076],{"class":634,"line":1075},8,[632,1077,789],{"class":642},[506,1079,1080,1083,1084,1087],{},[515,1081,1082],{},"tailFsLogs(options)"," first yields existing events (unless ",[515,1085,1086],{},"fromEnd: true","), then keeps yielding new ones as they're appended — including events written into newly created daily files. Partial writes split across polls are recombined transparently.",[797,1089,1091],{"id":1090},"tail-specific-options","Tail-specific options",[801,1093,1094,1104],{},[804,1095,1096],{},[807,1097,1098,1100,1102],{},[810,1099,812],{},[810,1101,815],{},[810,1103,818],{},[820,1105,1106,1121,1136],{},[807,1107,1108,1113,1118],{},[825,1109,1110],{},[515,1111,1112],{},"pollIntervalMs",[825,1114,1115],{},[515,1116,1117],{},"number",[825,1119,1120],{},"Polling interval. Default: 500ms (minimum 50ms).",[807,1122,1123,1128,1133],{},[825,1124,1125],{},[515,1126,1127],{},"fromEnd",[825,1129,1130],{},[515,1131,1132],{},"boolean",[825,1134,1135],{},"Skip existing events; only yield future ones. Default: false.",[807,1137,1138,1143,1147],{},[825,1139,1140],{},[515,1141,1142],{},"signal",[825,1144,1145],{},[515,1146,587],{},[825,1148,1149],{},"Stop tailing when aborted.",[506,1151,1152,1153,1158],{},"All ",[510,1154,1156],{"href":1155},"#options",[515,1157,570],{}," options also apply.",[618,1160,1162],{"id":1161},"use-cases","Use cases",[552,1164,1165,1171,1174,1184],{},[555,1166,1167,1168,1170],{},"A local Electron \u002F Tauri dashboard reading ",[515,1169,521],{}," from a target project directory",[555,1172,1173],{},"A CI report aggregator that scans logs after a test run",[555,1175,1176,1177,1180,1181],{},"A ",[515,1178,1179],{},"grep","-style CLI that pipes filtered events into ",[515,1182,1183],{},"jq",[555,1185,1186,1187],{},"Replaying historic events into a dashboard before switching to a live in-process subscription. See the ",[510,1188,1190],{"href":1189},"\u002Fextend\u002Fconsumer-recipes#3-replay-history-then-go-live","replay-then-live recipe",[1192,1193,1194],"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 .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 .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}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 .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);}",{"title":628,"searchDepth":665,"depth":665,"links":1196},[1197,1200,1203],{"id":620,"depth":665,"text":621,"children":1198},[1199],{"id":799,"depth":672,"text":311},{"id":906,"depth":665,"text":907,"children":1201},[1202],{"id":1090,"depth":672,"text":1091},{"id":1161,"depth":665,"text":1162},"Replay and tail the local NDJSON drain with readFsLogs and tailFsLogs — works in-process or from any external Node tool, survives restarts.","md",null,{},{"title":435,"icon":438},{"title":435,"description":1204},"hip7SEWxeeu5DMPk0t0UWw-70GfCvrAeqjgm7ysLBmE",[1212,1214],{"title":430,"path":431,"stem":432,"description":1213,"icon":433,"children":-1},"Build evlog support for an HTTP framework (or non-HTTP runtime) without a built-in integration. Use defineFrameworkIntegration for the (ctx, next) middleware shape, or createMiddlewareLogger \u002F createRequestLogger for everything else.",{"title":381,"path":440,"stem":441,"description":1215,"icon":442,"children":-1},"Concrete copy-paste recipes — build your own minimal devtool, pipe to curl + jq, replay history then go live, and aggregate on the consumer side.",1785016757604]