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The ",[466,483,484],{},"evlog\u002Ffs"," module also ships ",[487,488,489],"strong",{},"readers"," that let any Node tool replay or follow that history without hooking into the running app.",[492,493],"ndjson-tail",{},[495,496,499,502,560],"prompt",{":actions":497,"description":498,"icon":388},"[\"copy\",\"cursor\",\"windsurf\"]","Read or tail evlog NDJSON logs from disk",[457,500,501],{},"Build a script that consumes evlog's local NDJSON history (no app hook required).",[503,504,505,516,529,539,557],"ul",{},[506,507,508,509,511,512,515],"li",{},"Confirm the filesystem drain is wired up (",[466,510,484],{}," adapter writing NDJSON to ",[466,513,514],{},".evlog\u002Flogs\u002F*.jsonl",")",[506,517,518,519,522,523,525,526],{},"For replay: import ",[466,520,521],{},"readFsLogs"," from ",[466,524,484],{}," and iterate ",[466,527,528],{},"for await (const event of readFsLogs({ since, until, level, filter }))",[506,530,531,532,535,536],{},"For follow mode: import ",[466,533,534],{},"tailFsLogs"," and iterate the same way — it watches for new lines, handles rotation, and accepts an ",[466,537,538],{},"AbortSignal",[506,540,541,542,545,546,545,549,552,553,556],{},"Apply filters at read time (",[466,543,544],{},"level",", ",[466,547,548],{},"since",[466,550,551],{},"until",", custom ",[466,554,555],{},"filter"," predicate) instead of post-processing",[506,558,559],{},"Treat malformed lines as silently skipped (partial writes happen) — never crash the script on a bad line",[457,561,562,563],{},"Docs: ",[461,564,565],{"href":565,"rel":566},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Ffs-reader",[567],"nofollow",[569,570,572],"h2",{"id":571},"replay-history","Replay history",[574,575,580],"pre",{"className":576,"code":577,"language":578,"meta":579,"style":579},"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","",[466,581,582,614,621,690,735],{"__ignoreMap":579},[583,584,587,591,595,599,602,605,608,611],"span",{"class":585,"line":586},"line",1,[583,588,590],{"class":589},"s7zQu","import",[583,592,594],{"class":593},"sMK4o"," {",[583,596,598],{"class":597},"sTEyZ"," readFsLogs",[583,600,601],{"class":593}," }",[583,603,604],{"class":589}," from",[583,606,607],{"class":593}," '",[583,609,484],{"class":610},"sfazB",[583,612,613],{"class":593},"'\n",[583,615,617],{"class":585,"line":616},2,[583,618,620],{"emptyLinePlaceholder":619},true,"\n",[583,622,624,627,630,633,637,640,643,646,649,652,656,659,661,664,667,670,673,675,677,680,682,684,687],{"class":585,"line":623},3,[583,625,626],{"class":589},"for",[583,628,629],{"class":589}," await",[583,631,632],{"class":597}," (",[583,634,636],{"class":635},"spNyl","const",[583,638,639],{"class":597}," event ",[583,641,642],{"class":593},"of",[583,644,598],{"class":645},"s2Zo4",[583,647,648],{"class":597},"(",[583,650,651],{"class":593},"{",[583,653,655],{"class":654},"swJcz"," since",[583,657,658],{"class":593},":",[583,660,607],{"class":593},[583,662,663],{"class":610},"2026-03-01",[583,665,666],{"class":593},"'",[583,668,669],{"class":593},",",[583,671,672],{"class":654}," level",[583,674,658],{"class":593},[583,676,607],{"class":593},[583,678,679],{"class":610},"error",[583,681,666],{"class":593},[583,683,601],{"class":593},[583,685,686],{"class":597},")) ",[583,688,689],{"class":593},"{\n",[583,691,693,696,699,702,704,707,709,712,714,717,719,722,725,727,729,732],{"class":585,"line":692},4,[583,694,695],{"class":597},"  console",[583,697,698],{"class":593},".",[583,700,701],{"class":645},"log",[583,703,648],{"class":654},[583,705,706],{"class":597},"event",[583,708,698],{"class":593},[583,710,711],{"class":597},"timestamp",[583,713,669],{"class":593},[583,715,716],{"class":597}," event",[583,718,698],{"class":593},[583,720,721],{"class":597},"action",[583,723,724],{"class":593}," ??",[583,726,716],{"class":597},[583,728,698],{"class":593},[583,730,731],{"class":597},"message",[583,733,734],{"class":654},")\n",[583,736,738],{"class":585,"line":737},5,[583,739,740],{"class":593},"}\n",[457,742,743,746],{},[466,744,745],{},"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.",[748,749,274],"h3",{"id":750},"options",[752,753,754,770],"table",{},[755,756,757],"thead",{},[758,759,760,764,767],"tr",{},[761,762,763],"th",{},"Option",[761,765,766],{},"Type",[761,768,769],{},"Description",[771,772,773,792,809,824,838],"tbody",{},[758,774,775,781,786],{},[776,777,778],"td",{},[466,779,780],{},"dir",[776,782,783],{},[466,784,785],{},"string",[776,787,788,789,698],{},"Directory to read from. Default: ",[466,790,791],{},".evlog\u002Flogs",[758,793,794,798,803],{},[776,795,796],{},[466,797,548],{},[776,799,800],{},[466,801,802],{},"Date | string",[776,804,805,806,698],{},"Yield events with ",[466,807,808],{},"timestamp >= since",[758,810,811,815,819],{},[776,812,813],{},[466,814,551],{},[776,816,817],{},[466,818,802],{},[776,820,805,821,698],{},[466,822,823],{},"timestamp \u003C= until",[758,825,826,830,835],{},[776,827,828],{},[466,829,544],{},[776,831,832],{},[466,833,834],{},"LogLevel | LogLevel[]",[776,836,837],{},"Filter by event level.",[758,839,840,844,849],{},[776,841,842],{},[466,843,555],{},[776,845,846],{},[466,847,848],{},"(event) => boolean",[776,850,851],{},"Custom predicate.",[457,853,854],{},"Malformed lines (partial writes, manual edits) are silently skipped — your script never crashes on a bad line.",[569,856,858],{"id":857},"live-tail","Live tail",[574,860,862],{"className":576,"code":861,"language":578,"meta":579,"style":579},"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",[466,863,864,883,887,906,944,948,988,1024],{"__ignoreMap":579},[583,865,866,868,870,873,875,877,879,881],{"class":585,"line":586},[583,867,590],{"class":589},[583,869,594],{"class":593},[583,871,872],{"class":597}," tailFsLogs",[583,874,601],{"class":593},[583,876,604],{"class":589},[583,878,607],{"class":593},[583,880,484],{"class":610},[583,882,613],{"class":593},[583,884,885],{"class":585,"line":616},[583,886,620],{"emptyLinePlaceholder":619},[583,888,889,891,894,897,900,903],{"class":585,"line":623},[583,890,636],{"class":635},[583,892,893],{"class":597}," ac ",[583,895,896],{"class":593},"=",[583,898,899],{"class":593}," new",[583,901,902],{"class":645}," AbortController",[583,904,905],{"class":597},"()\n",[583,907,908,911,913,916,918,920,923,925,927,930,933,936,938,941],{"class":585,"line":692},[583,909,910],{"class":597},"process",[583,912,698],{"class":593},[583,914,915],{"class":645},"on",[583,917,648],{"class":597},[583,919,666],{"class":593},[583,921,922],{"class":610},"SIGINT",[583,924,666],{"class":593},[583,926,669],{"class":593},[583,928,929],{"class":593}," ()",[583,931,932],{"class":635}," =>",[583,934,935],{"class":597}," ac",[583,937,698],{"class":593},[583,939,940],{"class":645},"abort",[583,942,943],{"class":597},"())\n",[583,945,946],{"class":585,"line":737},[583,947,620],{"emptyLinePlaceholder":619},[583,949,951,953,955,957,959,961,963,965,967,969,972,974,976,978,981,984,986],{"class":585,"line":950},6,[583,952,626],{"class":589},[583,954,629],{"class":589},[583,956,632],{"class":597},[583,958,636],{"class":635},[583,960,639],{"class":597},[583,962,642],{"class":593},[583,964,872],{"class":645},[583,966,648],{"class":597},[583,968,651],{"class":593},[583,970,971],{"class":654}," signal",[583,973,658],{"class":593},[583,975,935],{"class":597},[583,977,698],{"class":593},[583,979,980],{"class":597},"signal ",[583,982,983],{"class":593},"}",[583,985,686],{"class":597},[583,987,689],{"class":593},[583,989,991,993,995,997,999,1001,1004,1006,1008,1010,1012,1014,1016,1018,1020,1022],{"class":585,"line":990},7,[583,992,695],{"class":597},[583,994,698],{"class":593},[583,996,701],{"class":645},[583,998,648],{"class":654},[583,1000,666],{"class":593},[583,1002,1003],{"class":610},"live:",[583,1005,666],{"class":593},[583,1007,669],{"class":593},[583,1009,716],{"class":597},[583,1011,698],{"class":593},[583,1013,721],{"class":597},[583,1015,724],{"class":593},[583,1017,716],{"class":597},[583,1019,698],{"class":593},[583,1021,731],{"class":597},[583,1023,734],{"class":654},[583,1025,1027],{"class":585,"line":1026},8,[583,1028,740],{"class":593},[457,1030,1031,1034,1035,1038],{},[466,1032,1033],{},"tailFsLogs(options)"," first yields existing events (unless ",[466,1036,1037],{},"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.",[748,1040,1042],{"id":1041},"tail-specific-options","Tail-specific options",[752,1044,1045,1055],{},[755,1046,1047],{},[758,1048,1049,1051,1053],{},[761,1050,763],{},[761,1052,766],{},[761,1054,769],{},[771,1056,1057,1072,1087],{},[758,1058,1059,1064,1069],{},[776,1060,1061],{},[466,1062,1063],{},"pollIntervalMs",[776,1065,1066],{},[466,1067,1068],{},"number",[776,1070,1071],{},"Polling interval. Default: 500ms (minimum 50ms).",[758,1073,1074,1079,1084],{},[776,1075,1076],{},[466,1077,1078],{},"fromEnd",[776,1080,1081],{},[466,1082,1083],{},"boolean",[776,1085,1086],{},"Skip existing events; only yield future ones. Default: false.",[758,1088,1089,1094,1098],{},[776,1090,1091],{},[466,1092,1093],{},"signal",[776,1095,1096],{},[466,1097,538],{},[776,1099,1100],{},"Stop tailing when aborted.",[457,1102,1103,1104,1109],{},"All ",[461,1105,1107],{"href":1106},"#options",[466,1108,521],{}," options also apply.",[569,1111,1113],{"id":1112},"use-cases","Use cases",[503,1115,1116,1122,1125,1135],{},[506,1117,1118,1119,1121],{},"A local Electron \u002F Tauri dashboard reading ",[466,1120,472],{}," from a target project directory",[506,1123,1124],{},"A CI report aggregator that scans logs after a test run",[506,1126,1127,1128,1131,1132],{},"A ",[466,1129,1130],{},"grep","-style CLI that pipes filtered events into ",[466,1133,1134],{},"jq",[506,1136,1137,1138],{},"Replaying historic events into a dashboard before switching to a live in-process subscription. See the ",[461,1139,1141],{"href":1140},"\u002Fextend\u002Fconsumer-recipes#3-replay-history-then-go-live","replay-then-live recipe",[1143,1144,1145],"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":579,"searchDepth":616,"depth":616,"links":1147},[1148,1151,1154],{"id":571,"depth":616,"text":572,"children":1149},[1150],{"id":750,"depth":623,"text":274},{"id":857,"depth":616,"text":858,"children":1152},[1153],{"id":1041,"depth":623,"text":1042},{"id":1112,"depth":616,"text":1113},"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":385,"icon":388},{"title":385,"description":1155},"SCzBqyBXRkVRmjoaY9V_r8Ze7mAwTSDKcXi1GrtN8HA",[1163,1165],{"title":380,"path":381,"stem":382,"description":1164,"icon":383,"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":345,"path":390,"stem":391,"description":1166,"icon":392,"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.",1784142042612]