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The ",[444,461,462],{},"evlog\u002Ffs"," module also ships ",[465,466,467],"strong",{},"readers"," that let any Node tool replay or follow that history without hooking into the running app.",[470,471],"ndjson-tail",{},[473,474,477,480,538],"prompt",{":actions":475,"description":476,"icon":366},"[\"copy\",\"cursor\",\"windsurf\"]","Read or tail evlog NDJSON logs from disk",[435,478,479],{},"Build a script that consumes evlog's local NDJSON history (no app hook required).",[481,482,483,494,507,517,535],"ul",{},[484,485,486,487,489,490,493],"li",{},"Confirm the filesystem drain is wired up (",[444,488,462],{}," adapter writing NDJSON to ",[444,491,492],{},".evlog\u002Flogs\u002F*.jsonl",")",[484,495,496,497,500,501,503,504],{},"For replay: import ",[444,498,499],{},"readFsLogs"," from ",[444,502,462],{}," and iterate ",[444,505,506],{},"for await (const event of readFsLogs({ since, until, level, filter }))",[484,508,509,510,513,514],{},"For follow mode: import ",[444,511,512],{},"tailFsLogs"," and iterate the same way — it watches for new lines, handles rotation, and accepts an ",[444,515,516],{},"AbortSignal",[484,518,519,520,523,524,523,527,530,531,534],{},"Apply filters at read time (",[444,521,522],{},"level",", ",[444,525,526],{},"since",[444,528,529],{},"until",", custom ",[444,532,533],{},"filter"," predicate) instead of post-processing",[484,536,537],{},"Treat malformed lines as silently skipped (partial writes happen) — never crash the script on a bad line",[435,539,540,541],{},"Docs: ",[439,542,543],{"href":543,"rel":544},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Ffs-reader",[545],"nofollow",[547,548,550],"h2",{"id":549},"replay-history","Replay history",[552,553,558],"pre",{"className":554,"code":555,"language":556,"meta":557,"style":557},"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","",[444,559,560,592,599,668,713],{"__ignoreMap":557},[561,562,565,569,573,577,580,583,586,589],"span",{"class":563,"line":564},"line",1,[561,566,568],{"class":567},"s7zQu","import",[561,570,572],{"class":571},"sMK4o"," {",[561,574,576],{"class":575},"sTEyZ"," readFsLogs",[561,578,579],{"class":571}," }",[561,581,582],{"class":567}," from",[561,584,585],{"class":571}," '",[561,587,462],{"class":588},"sfazB",[561,590,591],{"class":571},"'\n",[561,593,595],{"class":563,"line":594},2,[561,596,598],{"emptyLinePlaceholder":597},true,"\n",[561,600,602,605,608,611,615,618,621,624,627,630,634,637,639,642,645,648,651,653,655,658,660,662,665],{"class":563,"line":601},3,[561,603,604],{"class":567},"for",[561,606,607],{"class":567}," await",[561,609,610],{"class":575}," (",[561,612,614],{"class":613},"spNyl","const",[561,616,617],{"class":575}," event ",[561,619,620],{"class":571},"of",[561,622,576],{"class":623},"s2Zo4",[561,625,626],{"class":575},"(",[561,628,629],{"class":571},"{",[561,631,633],{"class":632},"swJcz"," since",[561,635,636],{"class":571},":",[561,638,585],{"class":571},[561,640,641],{"class":588},"2026-03-01",[561,643,644],{"class":571},"'",[561,646,647],{"class":571},",",[561,649,650],{"class":632}," level",[561,652,636],{"class":571},[561,654,585],{"class":571},[561,656,657],{"class":588},"error",[561,659,644],{"class":571},[561,661,579],{"class":571},[561,663,664],{"class":575},")) ",[561,666,667],{"class":571},"{\n",[561,669,671,674,677,680,682,685,687,690,692,695,697,700,703,705,707,710],{"class":563,"line":670},4,[561,672,673],{"class":575},"  console",[561,675,676],{"class":571},".",[561,678,679],{"class":623},"log",[561,681,626],{"class":632},[561,683,684],{"class":575},"event",[561,686,676],{"class":571},[561,688,689],{"class":575},"timestamp",[561,691,647],{"class":571},[561,693,694],{"class":575}," event",[561,696,676],{"class":571},[561,698,699],{"class":575},"action",[561,701,702],{"class":571}," ??",[561,704,694],{"class":575},[561,706,676],{"class":571},[561,708,709],{"class":575},"message",[561,711,712],{"class":632},")\n",[561,714,716],{"class":563,"line":715},5,[561,717,718],{"class":571},"}\n",[435,720,721,724],{},[444,722,723],{},"readFsLogs(options)"," walks the NDJSON files in chronological order, parses them line by line, and yields events that pass all filters. 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Default: ",[444,768,769],{},".evlog\u002Flogs",[736,771,772,776,781],{},[754,773,774],{},[444,775,526],{},[754,777,778],{},[444,779,780],{},"Date | string",[754,782,783,784,676],{},"Yield events with ",[444,785,786],{},"timestamp >= since",[736,788,789,793,797],{},[754,790,791],{},[444,792,529],{},[754,794,795],{},[444,796,780],{},[754,798,783,799,676],{},[444,800,801],{},"timestamp \u003C= until",[736,803,804,808,813],{},[754,805,806],{},[444,807,522],{},[754,809,810],{},[444,811,812],{},"LogLevel | LogLevel[]",[754,814,815],{},"Filter by event level.",[736,817,818,822,827],{},[754,819,820],{},[444,821,533],{},[754,823,824],{},[444,825,826],{},"(event) => boolean",[754,828,829],{},"Custom predicate.",[435,831,832],{},"Malformed lines (partial writes, manual edits) are silently skipped — your script never crashes on a bad line.",[547,834,836],{"id":835},"live-tail","Live tail",[552,838,840],{"className":554,"code":839,"language":556,"meta":557,"style":557},"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",[444,841,842,861,865,884,922,926,966,1002],{"__ignoreMap":557},[561,843,844,846,848,851,853,855,857,859],{"class":563,"line":564},[561,845,568],{"class":567},[561,847,572],{"class":571},[561,849,850],{"class":575}," tailFsLogs",[561,852,579],{"class":571},[561,854,582],{"class":567},[561,856,585],{"class":571},[561,858,462],{"class":588},[561,860,591],{"class":571},[561,862,863],{"class":563,"line":594},[561,864,598],{"emptyLinePlaceholder":597},[561,866,867,869,872,875,878,881],{"class":563,"line":601},[561,868,614],{"class":613},[561,870,871],{"class":575}," ac ",[561,873,874],{"class":571},"=",[561,876,877],{"class":571}," new",[561,879,880],{"class":623}," AbortController",[561,882,883],{"class":575},"()\n",[561,885,886,889,891,894,896,898,901,903,905,908,911,914,916,919],{"class":563,"line":670},[561,887,888],{"class":575},"process",[561,890,676],{"class":571},[561,892,893],{"class":623},"on",[561,895,626],{"class":575},[561,897,644],{"class":571},[561,899,900],{"class":588},"SIGINT",[561,902,644],{"class":571},[561,904,647],{"class":571},[561,906,907],{"class":571}," ()",[561,909,910],{"class":613}," =>",[561,912,913],{"class":575}," ac",[561,915,676],{"class":571},[561,917,918],{"class":623},"abort",[561,920,921],{"class":575},"())\n",[561,923,924],{"class":563,"line":715},[561,925,598],{"emptyLinePlaceholder":597},[561,927,929,931,933,935,937,939,941,943,945,947,950,952,954,956,959,962,964],{"class":563,"line":928},6,[561,930,604],{"class":567},[561,932,607],{"class":567},[561,934,610],{"class":575},[561,936,614],{"class":613},[561,938,617],{"class":575},[561,940,620],{"class":571},[561,942,850],{"class":623},[561,944,626],{"class":575},[561,946,629],{"class":571},[561,948,949],{"class":632}," signal",[561,951,636],{"class":571},[561,953,913],{"class":575},[561,955,676],{"class":571},[561,957,958],{"class":575},"signal ",[561,960,961],{"class":571},"}",[561,963,664],{"class":575},[561,965,667],{"class":571},[561,967,969,971,973,975,977,979,982,984,986,988,990,992,994,996,998,1000],{"class":563,"line":968},7,[561,970,673],{"class":575},[561,972,676],{"class":571},[561,974,679],{"class":623},[561,976,626],{"class":632},[561,978,644],{"class":571},[561,980,981],{"class":588},"live:",[561,983,644],{"class":571},[561,985,647],{"class":571},[561,987,694],{"class":575},[561,989,676],{"class":571},[561,991,699],{"class":575},[561,993,702],{"class":571},[561,995,694],{"class":575},[561,997,676],{"class":571},[561,999,709],{"class":575},[561,1001,712],{"class":632},[561,1003,1005],{"class":563,"line":1004},8,[561,1006,718],{"class":571},[435,1008,1009,1012,1013,1016],{},[444,1010,1011],{},"tailFsLogs(options)"," first yields existing events (unless ",[444,1014,1015],{},"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.",[726,1018,1020],{"id":1019},"tail-specific-options","Tail-specific options",[730,1022,1023,1033],{},[733,1024,1025],{},[736,1026,1027,1029,1031],{},[739,1028,741],{},[739,1030,744],{},[739,1032,747],{},[749,1034,1035,1050,1065],{},[736,1036,1037,1042,1047],{},[754,1038,1039],{},[444,1040,1041],{},"pollIntervalMs",[754,1043,1044],{},[444,1045,1046],{},"number",[754,1048,1049],{},"Polling interval. Default: 500ms (minimum 50ms).",[736,1051,1052,1057,1062],{},[754,1053,1054],{},[444,1055,1056],{},"fromEnd",[754,1058,1059],{},[444,1060,1061],{},"boolean",[754,1063,1064],{},"Skip existing events; only yield future ones. Default: false.",[736,1066,1067,1072,1076],{},[754,1068,1069],{},[444,1070,1071],{},"signal",[754,1073,1074],{},[444,1075,516],{},[754,1077,1078],{},"Stop tailing when aborted.",[435,1080,1081,1082,1087],{},"All ",[439,1083,1085],{"href":1084},"#options",[444,1086,499],{}," options also apply.",[547,1089,1091],{"id":1090},"use-cases","Use cases",[481,1093,1094,1100,1103,1113],{},[484,1095,1096,1097,1099],{},"A local Electron \u002F Tauri dashboard reading ",[444,1098,450],{}," from a target project directory",[484,1101,1102],{},"A CI report aggregator that scans logs after a test run",[484,1104,1105,1106,1109,1110],{},"A ",[444,1107,1108],{},"grep","-style CLI that pipes filtered events into ",[444,1111,1112],{},"jq",[484,1114,1115,1116],{},"Replaying historic events into a dashboard before switching to a live in-process subscription. See the ",[439,1117,1119],{"href":1118},"\u002Fextend\u002Fconsumer-recipes#3-replay-history-then-go-live","replay-then-live recipe",[1121,1122,1123],"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":557,"searchDepth":594,"depth":594,"links":1125},[1126,1129,1132],{"id":549,"depth":594,"text":550,"children":1127},[1128],{"id":728,"depth":601,"text":264},{"id":835,"depth":594,"text":836,"children":1130},[1131],{"id":1019,"depth":601,"text":1020},{"id":1090,"depth":594,"text":1091},"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":363,"icon":366},{"title":363,"description":1133},"SCzBqyBXRkVRmjoaY9V_r8Ze7mAwTSDKcXi1GrtN8HA",[1141,1143],{"title":358,"path":359,"stem":360,"description":1142,"icon":361,"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":335,"path":368,"stem":369,"description":1144,"icon":370,"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.",1778440158782]