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The ",[449,466,467],{},"evlog\u002Ffs"," module also ships ",[470,471,472],"strong",{},"readers"," that let any Node tool replay or follow that history without hooking into the running app.",[475,476],"ndjson-tail",{},[478,479,482,485,543],"prompt",{":actions":480,"description":481,"icon":371},"[\"copy\",\"cursor\",\"windsurf\"]","Read or tail evlog NDJSON logs from disk",[440,483,484],{},"Build a script that consumes evlog's local NDJSON history (no app hook required).",[486,487,488,499,512,522,540],"ul",{},[489,490,491,492,494,495,498],"li",{},"Confirm the filesystem drain is wired up (",[449,493,467],{}," adapter writing NDJSON to ",[449,496,497],{},".evlog\u002Flogs\u002F*.jsonl",")",[489,500,501,502,505,506,508,509],{},"For replay: import ",[449,503,504],{},"readFsLogs"," from ",[449,507,467],{}," and iterate ",[449,510,511],{},"for await (const event of readFsLogs({ since, until, level, filter }))",[489,513,514,515,518,519],{},"For follow mode: import ",[449,516,517],{},"tailFsLogs"," and iterate the same way — it watches for new lines, handles rotation, and accepts an ",[449,520,521],{},"AbortSignal",[489,523,524,525,528,529,528,532,535,536,539],{},"Apply filters at read time (",[449,526,527],{},"level",", ",[449,530,531],{},"since",[449,533,534],{},"until",", custom ",[449,537,538],{},"filter"," predicate) instead of post-processing",[489,541,542],{},"Treat malformed lines as silently skipped (partial writes happen) — never crash the script on a bad line",[440,544,545,546],{},"Docs: ",[444,547,548],{"href":548,"rel":549},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Ffs-reader",[550],"nofollow",[552,553,555],"h2",{"id":554},"replay-history","Replay history",[557,558,563],"pre",{"className":559,"code":560,"language":561,"meta":562,"style":562},"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","",[449,564,565,597,604,673,718],{"__ignoreMap":562},[566,567,570,574,578,582,585,588,591,594],"span",{"class":568,"line":569},"line",1,[566,571,573],{"class":572},"s7zQu","import",[566,575,577],{"class":576},"sMK4o"," {",[566,579,581],{"class":580},"sTEyZ"," readFsLogs",[566,583,584],{"class":576}," }",[566,586,587],{"class":572}," from",[566,589,590],{"class":576}," '",[566,592,467],{"class":593},"sfazB",[566,595,596],{"class":576},"'\n",[566,598,600],{"class":568,"line":599},2,[566,601,603],{"emptyLinePlaceholder":602},true,"\n",[566,605,607,610,613,616,620,623,626,629,632,635,639,642,644,647,650,653,656,658,660,663,665,667,670],{"class":568,"line":606},3,[566,608,609],{"class":572},"for",[566,611,612],{"class":572}," await",[566,614,615],{"class":580}," (",[566,617,619],{"class":618},"spNyl","const",[566,621,622],{"class":580}," event ",[566,624,625],{"class":576},"of",[566,627,581],{"class":628},"s2Zo4",[566,630,631],{"class":580},"(",[566,633,634],{"class":576},"{",[566,636,638],{"class":637},"swJcz"," since",[566,640,641],{"class":576},":",[566,643,590],{"class":576},[566,645,646],{"class":593},"2026-03-01",[566,648,649],{"class":576},"'",[566,651,652],{"class":576},",",[566,654,655],{"class":637}," level",[566,657,641],{"class":576},[566,659,590],{"class":576},[566,661,662],{"class":593},"error",[566,664,649],{"class":576},[566,666,584],{"class":576},[566,668,669],{"class":580},")) ",[566,671,672],{"class":576},"{\n",[566,674,676,679,682,685,687,690,692,695,697,700,702,705,708,710,712,715],{"class":568,"line":675},4,[566,677,678],{"class":580},"  console",[566,680,681],{"class":576},".",[566,683,684],{"class":628},"log",[566,686,631],{"class":637},[566,688,689],{"class":580},"event",[566,691,681],{"class":576},[566,693,694],{"class":580},"timestamp",[566,696,652],{"class":576},[566,698,699],{"class":580}," event",[566,701,681],{"class":576},[566,703,704],{"class":580},"action",[566,706,707],{"class":576}," ??",[566,709,699],{"class":580},[566,711,681],{"class":576},[566,713,714],{"class":580},"message",[566,716,717],{"class":637},")\n",[566,719,721],{"class":568,"line":720},5,[566,722,723],{"class":576},"}\n",[440,725,726,729],{},[449,727,728],{},"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: ",[449,773,774],{},".evlog\u002Flogs",[741,776,777,781,786],{},[759,778,779],{},[449,780,531],{},[759,782,783],{},[449,784,785],{},"Date | string",[759,787,788,789,681],{},"Yield events with ",[449,790,791],{},"timestamp >= since",[741,793,794,798,802],{},[759,795,796],{},[449,797,534],{},[759,799,800],{},[449,801,785],{},[759,803,788,804,681],{},[449,805,806],{},"timestamp \u003C= until",[741,808,809,813,818],{},[759,810,811],{},[449,812,527],{},[759,814,815],{},[449,816,817],{},"LogLevel | LogLevel[]",[759,819,820],{},"Filter by event level.",[741,822,823,827,832],{},[759,824,825],{},[449,826,538],{},[759,828,829],{},[449,830,831],{},"(event) => boolean",[759,833,834],{},"Custom predicate.",[440,836,837],{},"Malformed lines (partial writes, manual edits) are silently skipped — your script never crashes on a bad line.",[552,839,841],{"id":840},"live-tail","Live tail",[557,843,845],{"className":559,"code":844,"language":561,"meta":562,"style":562},"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",[449,846,847,866,870,889,927,931,971,1007],{"__ignoreMap":562},[566,848,849,851,853,856,858,860,862,864],{"class":568,"line":569},[566,850,573],{"class":572},[566,852,577],{"class":576},[566,854,855],{"class":580}," tailFsLogs",[566,857,584],{"class":576},[566,859,587],{"class":572},[566,861,590],{"class":576},[566,863,467],{"class":593},[566,865,596],{"class":576},[566,867,868],{"class":568,"line":599},[566,869,603],{"emptyLinePlaceholder":602},[566,871,872,874,877,880,883,886],{"class":568,"line":606},[566,873,619],{"class":618},[566,875,876],{"class":580}," ac ",[566,878,879],{"class":576},"=",[566,881,882],{"class":576}," new",[566,884,885],{"class":628}," AbortController",[566,887,888],{"class":580},"()\n",[566,890,891,894,896,899,901,903,906,908,910,913,916,919,921,924],{"class":568,"line":675},[566,892,893],{"class":580},"process",[566,895,681],{"class":576},[566,897,898],{"class":628},"on",[566,900,631],{"class":580},[566,902,649],{"class":576},[566,904,905],{"class":593},"SIGINT",[566,907,649],{"class":576},[566,909,652],{"class":576},[566,911,912],{"class":576}," ()",[566,914,915],{"class":618}," =>",[566,917,918],{"class":580}," ac",[566,920,681],{"class":576},[566,922,923],{"class":628},"abort",[566,925,926],{"class":580},"())\n",[566,928,929],{"class":568,"line":720},[566,930,603],{"emptyLinePlaceholder":602},[566,932,934,936,938,940,942,944,946,948,950,952,955,957,959,961,964,967,969],{"class":568,"line":933},6,[566,935,609],{"class":572},[566,937,612],{"class":572},[566,939,615],{"class":580},[566,941,619],{"class":618},[566,943,622],{"class":580},[566,945,625],{"class":576},[566,947,855],{"class":628},[566,949,631],{"class":580},[566,951,634],{"class":576},[566,953,954],{"class":637}," signal",[566,956,641],{"class":576},[566,958,918],{"class":580},[566,960,681],{"class":576},[566,962,963],{"class":580},"signal ",[566,965,966],{"class":576},"}",[566,968,669],{"class":580},[566,970,672],{"class":576},[566,972,974,976,978,980,982,984,987,989,991,993,995,997,999,1001,1003,1005],{"class":568,"line":973},7,[566,975,678],{"class":580},[566,977,681],{"class":576},[566,979,684],{"class":628},[566,981,631],{"class":637},[566,983,649],{"class":576},[566,985,986],{"class":593},"live:",[566,988,649],{"class":576},[566,990,652],{"class":576},[566,992,699],{"class":580},[566,994,681],{"class":576},[566,996,704],{"class":580},[566,998,707],{"class":576},[566,1000,699],{"class":580},[566,1002,681],{"class":576},[566,1004,714],{"class":580},[566,1006,717],{"class":637},[566,1008,1010],{"class":568,"line":1009},8,[566,1011,723],{"class":576},[440,1013,1014,1017,1018,1021],{},[449,1015,1016],{},"tailFsLogs(options)"," first yields existing events (unless ",[449,1019,1020],{},"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.",[731,1023,1025],{"id":1024},"tail-specific-options","Tail-specific options",[735,1027,1028,1038],{},[738,1029,1030],{},[741,1031,1032,1034,1036],{},[744,1033,746],{},[744,1035,749],{},[744,1037,752],{},[754,1039,1040,1055,1070],{},[741,1041,1042,1047,1052],{},[759,1043,1044],{},[449,1045,1046],{},"pollIntervalMs",[759,1048,1049],{},[449,1050,1051],{},"number",[759,1053,1054],{},"Polling interval. Default: 500ms (minimum 50ms).",[741,1056,1057,1062,1067],{},[759,1058,1059],{},[449,1060,1061],{},"fromEnd",[759,1063,1064],{},[449,1065,1066],{},"boolean",[759,1068,1069],{},"Skip existing events; only yield future ones. Default: false.",[741,1071,1072,1077,1081],{},[759,1073,1074],{},[449,1075,1076],{},"signal",[759,1078,1079],{},[449,1080,521],{},[759,1082,1083],{},"Stop tailing when aborted.",[440,1085,1086,1087,1092],{},"All ",[444,1088,1090],{"href":1089},"#options",[449,1091,504],{}," options also apply.",[552,1094,1096],{"id":1095},"use-cases","Use cases",[486,1098,1099,1105,1108,1118],{},[489,1100,1101,1102,1104],{},"A local Electron \u002F Tauri dashboard reading ",[449,1103,455],{}," from a target project directory",[489,1106,1107],{},"A CI report aggregator that scans logs after a test run",[489,1109,1110,1111,1114,1115],{},"A ",[449,1112,1113],{},"grep","-style CLI that pipes filtered events into ",[449,1116,1117],{},"jq",[489,1119,1120,1121],{},"Replaying historic events into a dashboard before switching to a live in-process subscription. See the ",[444,1122,1124],{"href":1123},"\u002Fextend\u002Fconsumer-recipes#3-replay-history-then-go-live","replay-then-live recipe",[1126,1127,1128],"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":562,"searchDepth":599,"depth":599,"links":1130},[1131,1134,1137],{"id":554,"depth":599,"text":555,"children":1132},[1133],{"id":733,"depth":606,"text":269},{"id":840,"depth":599,"text":841,"children":1135},[1136],{"id":1024,"depth":606,"text":1025},{"id":1095,"depth":599,"text":1096},"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":368,"icon":371},{"title":368,"description":1138},"SCzBqyBXRkVRmjoaY9V_r8Ze7mAwTSDKcXi1GrtN8HA",[1146,1148],{"title":363,"path":364,"stem":365,"description":1147,"icon":366,"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":340,"path":373,"stem":374,"description":1149,"icon":375,"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.",1778445005869]