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The ",[462,479,480],{},"evlog\u002Ffs"," module also ships ",[483,484,485],"strong",{},"readers"," that let any Node tool replay or follow that history without hooking into the running app.",[488,489],"ndjson-tail",{},[491,492,495,498,556],"prompt",{":actions":493,"description":494,"icon":384},"[\"copy\",\"cursor\",\"windsurf\"]","Read or tail evlog NDJSON logs from disk",[453,496,497],{},"Build a script that consumes evlog's local NDJSON history (no app hook required).",[499,500,501,512,525,535,553],"ul",{},[502,503,504,505,507,508,511],"li",{},"Confirm the filesystem drain is wired up (",[462,506,480],{}," adapter writing NDJSON to ",[462,509,510],{},".evlog\u002Flogs\u002F*.jsonl",")",[502,513,514,515,518,519,521,522],{},"For replay: import ",[462,516,517],{},"readFsLogs"," from ",[462,520,480],{}," and iterate ",[462,523,524],{},"for await (const event of readFsLogs({ since, until, level, filter }))",[502,526,527,528,531,532],{},"For follow mode: import ",[462,529,530],{},"tailFsLogs"," and iterate the same way — it watches for new lines, handles rotation, and accepts an ",[462,533,534],{},"AbortSignal",[502,536,537,538,541,542,541,545,548,549,552],{},"Apply filters at read time (",[462,539,540],{},"level",", ",[462,543,544],{},"since",[462,546,547],{},"until",", custom ",[462,550,551],{},"filter"," predicate) instead of post-processing",[502,554,555],{},"Treat malformed lines as silently skipped (partial writes happen) — never crash the script on a bad line",[453,557,558,559],{},"Docs: ",[457,560,561],{"href":561,"rel":562},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Ffs-reader",[563],"nofollow",[565,566,568],"h2",{"id":567},"replay-history","Replay history",[570,571,576],"pre",{"className":572,"code":573,"language":574,"meta":575,"style":575},"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","",[462,577,578,610,617,686,731],{"__ignoreMap":575},[579,580,583,587,591,595,598,601,604,607],"span",{"class":581,"line":582},"line",1,[579,584,586],{"class":585},"s7zQu","import",[579,588,590],{"class":589},"sMK4o"," {",[579,592,594],{"class":593},"sTEyZ"," readFsLogs",[579,596,597],{"class":589}," }",[579,599,600],{"class":585}," from",[579,602,603],{"class":589}," '",[579,605,480],{"class":606},"sfazB",[579,608,609],{"class":589},"'\n",[579,611,613],{"class":581,"line":612},2,[579,614,616],{"emptyLinePlaceholder":615},true,"\n",[579,618,620,623,626,629,633,636,639,642,645,648,652,655,657,660,663,666,669,671,673,676,678,680,683],{"class":581,"line":619},3,[579,621,622],{"class":585},"for",[579,624,625],{"class":585}," await",[579,627,628],{"class":593}," (",[579,630,632],{"class":631},"spNyl","const",[579,634,635],{"class":593}," event ",[579,637,638],{"class":589},"of",[579,640,594],{"class":641},"s2Zo4",[579,643,644],{"class":593},"(",[579,646,647],{"class":589},"{",[579,649,651],{"class":650},"swJcz"," since",[579,653,654],{"class":589},":",[579,656,603],{"class":589},[579,658,659],{"class":606},"2026-03-01",[579,661,662],{"class":589},"'",[579,664,665],{"class":589},",",[579,667,668],{"class":650}," level",[579,670,654],{"class":589},[579,672,603],{"class":589},[579,674,675],{"class":606},"error",[579,677,662],{"class":589},[579,679,597],{"class":589},[579,681,682],{"class":593},")) ",[579,684,685],{"class":589},"{\n",[579,687,689,692,695,698,700,703,705,708,710,713,715,718,721,723,725,728],{"class":581,"line":688},4,[579,690,691],{"class":593},"  console",[579,693,694],{"class":589},".",[579,696,697],{"class":641},"log",[579,699,644],{"class":650},[579,701,702],{"class":593},"event",[579,704,694],{"class":589},[579,706,707],{"class":593},"timestamp",[579,709,665],{"class":589},[579,711,712],{"class":593}," event",[579,714,694],{"class":589},[579,716,717],{"class":593},"action",[579,719,720],{"class":589}," ??",[579,722,712],{"class":593},[579,724,694],{"class":589},[579,726,727],{"class":593},"message",[579,729,730],{"class":650},")\n",[579,732,734],{"class":581,"line":733},5,[579,735,736],{"class":589},"}\n",[453,738,739,742],{},[462,740,741],{},"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.",[744,745,274],"h3",{"id":746},"options",[748,749,750,766],"table",{},[751,752,753],"thead",{},[754,755,756,760,763],"tr",{},[757,758,759],"th",{},"Option",[757,761,762],{},"Type",[757,764,765],{},"Description",[767,768,769,788,805,820,834],"tbody",{},[754,770,771,777,782],{},[772,773,774],"td",{},[462,775,776],{},"dir",[772,778,779],{},[462,780,781],{},"string",[772,783,784,785,694],{},"Directory to read from. Default: ",[462,786,787],{},".evlog\u002Flogs",[754,789,790,794,799],{},[772,791,792],{},[462,793,544],{},[772,795,796],{},[462,797,798],{},"Date | string",[772,800,801,802,694],{},"Yield events with ",[462,803,804],{},"timestamp >= since",[754,806,807,811,815],{},[772,808,809],{},[462,810,547],{},[772,812,813],{},[462,814,798],{},[772,816,801,817,694],{},[462,818,819],{},"timestamp \u003C= until",[754,821,822,826,831],{},[772,823,824],{},[462,825,540],{},[772,827,828],{},[462,829,830],{},"LogLevel | LogLevel[]",[772,832,833],{},"Filter by event level.",[754,835,836,840,845],{},[772,837,838],{},[462,839,551],{},[772,841,842],{},[462,843,844],{},"(event) => boolean",[772,846,847],{},"Custom predicate.",[453,849,850],{},"Malformed lines (partial writes, manual edits) are silently skipped — your script never crashes on a bad line.",[565,852,854],{"id":853},"live-tail","Live tail",[570,856,858],{"className":572,"code":857,"language":574,"meta":575,"style":575},"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",[462,859,860,879,883,902,940,944,984,1020],{"__ignoreMap":575},[579,861,862,864,866,869,871,873,875,877],{"class":581,"line":582},[579,863,586],{"class":585},[579,865,590],{"class":589},[579,867,868],{"class":593}," tailFsLogs",[579,870,597],{"class":589},[579,872,600],{"class":585},[579,874,603],{"class":589},[579,876,480],{"class":606},[579,878,609],{"class":589},[579,880,881],{"class":581,"line":612},[579,882,616],{"emptyLinePlaceholder":615},[579,884,885,887,890,893,896,899],{"class":581,"line":619},[579,886,632],{"class":631},[579,888,889],{"class":593}," ac ",[579,891,892],{"class":589},"=",[579,894,895],{"class":589}," new",[579,897,898],{"class":641}," AbortController",[579,900,901],{"class":593},"()\n",[579,903,904,907,909,912,914,916,919,921,923,926,929,932,934,937],{"class":581,"line":688},[579,905,906],{"class":593},"process",[579,908,694],{"class":589},[579,910,911],{"class":641},"on",[579,913,644],{"class":593},[579,915,662],{"class":589},[579,917,918],{"class":606},"SIGINT",[579,920,662],{"class":589},[579,922,665],{"class":589},[579,924,925],{"class":589}," ()",[579,927,928],{"class":631}," =>",[579,930,931],{"class":593}," ac",[579,933,694],{"class":589},[579,935,936],{"class":641},"abort",[579,938,939],{"class":593},"())\n",[579,941,942],{"class":581,"line":733},[579,943,616],{"emptyLinePlaceholder":615},[579,945,947,949,951,953,955,957,959,961,963,965,968,970,972,974,977,980,982],{"class":581,"line":946},6,[579,948,622],{"class":585},[579,950,625],{"class":585},[579,952,628],{"class":593},[579,954,632],{"class":631},[579,956,635],{"class":593},[579,958,638],{"class":589},[579,960,868],{"class":641},[579,962,644],{"class":593},[579,964,647],{"class":589},[579,966,967],{"class":650}," signal",[579,969,654],{"class":589},[579,971,931],{"class":593},[579,973,694],{"class":589},[579,975,976],{"class":593},"signal ",[579,978,979],{"class":589},"}",[579,981,682],{"class":593},[579,983,685],{"class":589},[579,985,987,989,991,993,995,997,1000,1002,1004,1006,1008,1010,1012,1014,1016,1018],{"class":581,"line":986},7,[579,988,691],{"class":593},[579,990,694],{"class":589},[579,992,697],{"class":641},[579,994,644],{"class":650},[579,996,662],{"class":589},[579,998,999],{"class":606},"live:",[579,1001,662],{"class":589},[579,1003,665],{"class":589},[579,1005,712],{"class":593},[579,1007,694],{"class":589},[579,1009,717],{"class":593},[579,1011,720],{"class":589},[579,1013,712],{"class":593},[579,1015,694],{"class":589},[579,1017,727],{"class":593},[579,1019,730],{"class":650},[579,1021,1023],{"class":581,"line":1022},8,[579,1024,736],{"class":589},[453,1026,1027,1030,1031,1034],{},[462,1028,1029],{},"tailFsLogs(options)"," first yields existing events (unless ",[462,1032,1033],{},"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.",[744,1036,1038],{"id":1037},"tail-specific-options","Tail-specific options",[748,1040,1041,1051],{},[751,1042,1043],{},[754,1044,1045,1047,1049],{},[757,1046,759],{},[757,1048,762],{},[757,1050,765],{},[767,1052,1053,1068,1083],{},[754,1054,1055,1060,1065],{},[772,1056,1057],{},[462,1058,1059],{},"pollIntervalMs",[772,1061,1062],{},[462,1063,1064],{},"number",[772,1066,1067],{},"Polling interval. Default: 500ms (minimum 50ms).",[754,1069,1070,1075,1080],{},[772,1071,1072],{},[462,1073,1074],{},"fromEnd",[772,1076,1077],{},[462,1078,1079],{},"boolean",[772,1081,1082],{},"Skip existing events; only yield future ones. Default: false.",[754,1084,1085,1090,1094],{},[772,1086,1087],{},[462,1088,1089],{},"signal",[772,1091,1092],{},[462,1093,534],{},[772,1095,1096],{},"Stop tailing when aborted.",[453,1098,1099,1100,1105],{},"All ",[457,1101,1103],{"href":1102},"#options",[462,1104,517],{}," options also apply.",[565,1107,1109],{"id":1108},"use-cases","Use cases",[499,1111,1112,1118,1121,1131],{},[502,1113,1114,1115,1117],{},"A local Electron \u002F Tauri dashboard reading ",[462,1116,468],{}," from a target project directory",[502,1119,1120],{},"A CI report aggregator that scans logs after a test run",[502,1122,1123,1124,1127,1128],{},"A ",[462,1125,1126],{},"grep","-style CLI that pipes filtered events into ",[462,1129,1130],{},"jq",[502,1132,1133,1134],{},"Replaying historic events into a dashboard before switching to a live in-process subscription. See the ",[457,1135,1137],{"href":1136},"\u002Fextend\u002Fconsumer-recipes#3-replay-history-then-go-live","replay-then-live recipe",[1139,1140,1141],"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":575,"searchDepth":612,"depth":612,"links":1143},[1144,1147,1150],{"id":567,"depth":612,"text":568,"children":1145},[1146],{"id":746,"depth":619,"text":274},{"id":853,"depth":612,"text":854,"children":1148},[1149],{"id":1037,"depth":619,"text":1038},{"id":1108,"depth":612,"text":1109},"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":381,"icon":384},{"title":381,"description":1151},"SCzBqyBXRkVRmjoaY9V_r8Ze7mAwTSDKcXi1GrtN8HA",[1159,1161],{"title":376,"path":377,"stem":378,"description":1160,"icon":379,"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":386,"stem":387,"description":1162,"icon":388,"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.",1782924672977]