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The ",[535,552,553],{},"evlog\u002Ffs"," module also ships ",[556,557,558],"strong",{},"readers"," that let any Node tool replay or follow that history without hooking into the running app.",[561,562],"ndjson-tail",{},[564,565,568,571,629],"prompt",{":actions":566,"description":567,"icon":458},"[\"copy\",\"cursor\",\"claude\"]","Read or tail evlog NDJSON logs from disk",[526,569,570],{},"Build a script that consumes evlog's local NDJSON history (no app hook required).",[572,573,574,585,598,608,626],"ul",{},[575,576,577,578,580,581,584],"li",{},"Confirm the filesystem drain is wired up (",[535,579,553],{}," adapter writing NDJSON to ",[535,582,583],{},".evlog\u002Flogs\u002F*.jsonl",")",[575,586,587,588,591,592,594,595],{},"For replay: import ",[535,589,590],{},"readFsLogs"," from ",[535,593,553],{}," and iterate ",[535,596,597],{},"for await (const event of readFsLogs({ since, until, level, filter }))",[575,599,600,601,604,605],{},"For follow mode: import ",[535,602,603],{},"tailFsLogs"," and iterate the same way — it watches for new lines, handles rotation, and accepts an ",[535,606,607],{},"AbortSignal",[575,609,610,611,614,615,614,618,621,622,625],{},"Apply filters at read time (",[535,612,613],{},"level",", ",[535,616,617],{},"since",[535,619,620],{},"until",", custom ",[535,623,624],{},"filter"," predicate) instead of post-processing",[575,627,628],{},"Treat malformed lines as silently skipped (partial writes happen) — never crash the script on a bad line",[526,630,631,632],{},"Docs: ",[530,633,634],{"href":634,"rel":635},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Ffs-reader",[636],"nofollow",[638,639,641],"h2",{"id":640},"replay-history","Replay history",[643,644,649],"pre",{"className":645,"code":646,"language":647,"meta":648,"style":648},"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","",[535,650,651,683,690,759,804],{"__ignoreMap":648},[652,653,656,660,664,668,671,674,677,680],"span",{"class":654,"line":655},"line",1,[652,657,659],{"class":658},"s7zQu","import",[652,661,663],{"class":662},"sMK4o"," {",[652,665,667],{"class":666},"sTEyZ"," readFsLogs",[652,669,670],{"class":662}," }",[652,672,673],{"class":658}," from",[652,675,676],{"class":662}," '",[652,678,553],{"class":679},"sfazB",[652,681,682],{"class":662},"'\n",[652,684,686],{"class":654,"line":685},2,[652,687,689],{"emptyLinePlaceholder":688},true,"\n",[652,691,693,696,699,702,706,709,712,715,718,721,725,728,730,733,736,739,742,744,746,749,751,753,756],{"class":654,"line":692},3,[652,694,695],{"class":658},"for",[652,697,698],{"class":658}," await",[652,700,701],{"class":666}," (",[652,703,705],{"class":704},"spNyl","const",[652,707,708],{"class":666}," event ",[652,710,711],{"class":662},"of",[652,713,667],{"class":714},"s2Zo4",[652,716,717],{"class":666},"(",[652,719,720],{"class":662},"{",[652,722,724],{"class":723},"swJcz"," since",[652,726,727],{"class":662},":",[652,729,676],{"class":662},[652,731,732],{"class":679},"2026-03-01",[652,734,735],{"class":662},"'",[652,737,738],{"class":662},",",[652,740,741],{"class":723}," level",[652,743,727],{"class":662},[652,745,676],{"class":662},[652,747,748],{"class":679},"error",[652,750,735],{"class":662},[652,752,670],{"class":662},[652,754,755],{"class":666},")) ",[652,757,758],{"class":662},"{\n",[652,760,762,765,768,771,773,776,778,781,783,786,788,791,794,796,798,801],{"class":654,"line":761},4,[652,763,764],{"class":666},"  console",[652,766,767],{"class":662},".",[652,769,770],{"class":714},"log",[652,772,717],{"class":723},[652,774,775],{"class":666},"event",[652,777,767],{"class":662},[652,779,780],{"class":666},"timestamp",[652,782,738],{"class":662},[652,784,785],{"class":666}," event",[652,787,767],{"class":662},[652,789,790],{"class":666},"action",[652,792,793],{"class":662}," ??",[652,795,785],{"class":666},[652,797,767],{"class":662},[652,799,800],{"class":666},"message",[652,802,803],{"class":723},")\n",[652,805,807],{"class":654,"line":806},5,[652,808,809],{"class":662},"}\n",[526,811,812,815],{},[535,813,814],{},"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.",[817,818,331],"h3",{"id":819},"options",[821,822,823,839],"table",{},[824,825,826],"thead",{},[827,828,829,833,836],"tr",{},[830,831,832],"th",{},"Option",[830,834,835],{},"Type",[830,837,838],{},"Description",[840,841,842,861,878,893,907],"tbody",{},[827,843,844,850,855],{},[845,846,847],"td",{},[535,848,849],{},"dir",[845,851,852],{},[535,853,854],{},"string",[845,856,857,858,767],{},"Directory to read from. Default: ",[535,859,860],{},".evlog\u002Flogs",[827,862,863,867,872],{},[845,864,865],{},[535,866,617],{},[845,868,869],{},[535,870,871],{},"Date | string",[845,873,874,875,767],{},"Yield events with ",[535,876,877],{},"timestamp >= since",[827,879,880,884,888],{},[845,881,882],{},[535,883,620],{},[845,885,886],{},[535,887,871],{},[845,889,874,890,767],{},[535,891,892],{},"timestamp \u003C= until",[827,894,895,899,904],{},[845,896,897],{},[535,898,613],{},[845,900,901],{},[535,902,903],{},"LogLevel | LogLevel[]",[845,905,906],{},"Filter by event level.",[827,908,909,913,918],{},[845,910,911],{},[535,912,624],{},[845,914,915],{},[535,916,917],{},"(event) => boolean",[845,919,920],{},"Custom predicate.",[526,922,923],{},"Malformed lines (partial writes, manual edits) are silently skipped — your script never crashes on a bad line.",[638,925,927],{"id":926},"live-tail","Live tail",[643,929,931],{"className":645,"code":930,"language":647,"meta":648,"style":648},"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",[535,932,933,952,956,975,1013,1017,1057,1093],{"__ignoreMap":648},[652,934,935,937,939,942,944,946,948,950],{"class":654,"line":655},[652,936,659],{"class":658},[652,938,663],{"class":662},[652,940,941],{"class":666}," tailFsLogs",[652,943,670],{"class":662},[652,945,673],{"class":658},[652,947,676],{"class":662},[652,949,553],{"class":679},[652,951,682],{"class":662},[652,953,954],{"class":654,"line":685},[652,955,689],{"emptyLinePlaceholder":688},[652,957,958,960,963,966,969,972],{"class":654,"line":692},[652,959,705],{"class":704},[652,961,962],{"class":666}," ac ",[652,964,965],{"class":662},"=",[652,967,968],{"class":662}," new",[652,970,971],{"class":714}," AbortController",[652,973,974],{"class":666},"()\n",[652,976,977,980,982,985,987,989,992,994,996,999,1002,1005,1007,1010],{"class":654,"line":761},[652,978,979],{"class":666},"process",[652,981,767],{"class":662},[652,983,984],{"class":714},"on",[652,986,717],{"class":666},[652,988,735],{"class":662},[652,990,991],{"class":679},"SIGINT",[652,993,735],{"class":662},[652,995,738],{"class":662},[652,997,998],{"class":662}," ()",[652,1000,1001],{"class":704}," =>",[652,1003,1004],{"class":666}," ac",[652,1006,767],{"class":662},[652,1008,1009],{"class":714},"abort",[652,1011,1012],{"class":666},"())\n",[652,1014,1015],{"class":654,"line":806},[652,1016,689],{"emptyLinePlaceholder":688},[652,1018,1020,1022,1024,1026,1028,1030,1032,1034,1036,1038,1041,1043,1045,1047,1050,1053,1055],{"class":654,"line":1019},6,[652,1021,695],{"class":658},[652,1023,698],{"class":658},[652,1025,701],{"class":666},[652,1027,705],{"class":704},[652,1029,708],{"class":666},[652,1031,711],{"class":662},[652,1033,941],{"class":714},[652,1035,717],{"class":666},[652,1037,720],{"class":662},[652,1039,1040],{"class":723}," signal",[652,1042,727],{"class":662},[652,1044,1004],{"class":666},[652,1046,767],{"class":662},[652,1048,1049],{"class":666},"signal ",[652,1051,1052],{"class":662},"}",[652,1054,755],{"class":666},[652,1056,758],{"class":662},[652,1058,1060,1062,1064,1066,1068,1070,1073,1075,1077,1079,1081,1083,1085,1087,1089,1091],{"class":654,"line":1059},7,[652,1061,764],{"class":666},[652,1063,767],{"class":662},[652,1065,770],{"class":714},[652,1067,717],{"class":723},[652,1069,735],{"class":662},[652,1071,1072],{"class":679},"live:",[652,1074,735],{"class":662},[652,1076,738],{"class":662},[652,1078,785],{"class":666},[652,1080,767],{"class":662},[652,1082,790],{"class":666},[652,1084,793],{"class":662},[652,1086,785],{"class":666},[652,1088,767],{"class":662},[652,1090,800],{"class":666},[652,1092,803],{"class":723},[652,1094,1096],{"class":654,"line":1095},8,[652,1097,809],{"class":662},[526,1099,1100,1103,1104,1107],{},[535,1101,1102],{},"tailFsLogs(options)"," first yields existing events (unless ",[535,1105,1106],{},"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.",[817,1109,1111],{"id":1110},"tail-specific-options","Tail-specific options",[821,1113,1114,1124],{},[824,1115,1116],{},[827,1117,1118,1120,1122],{},[830,1119,832],{},[830,1121,835],{},[830,1123,838],{},[840,1125,1126,1141,1156],{},[827,1127,1128,1133,1138],{},[845,1129,1130],{},[535,1131,1132],{},"pollIntervalMs",[845,1134,1135],{},[535,1136,1137],{},"number",[845,1139,1140],{},"Polling interval. Default: 500ms (minimum 50ms).",[827,1142,1143,1148,1153],{},[845,1144,1145],{},[535,1146,1147],{},"fromEnd",[845,1149,1150],{},[535,1151,1152],{},"boolean",[845,1154,1155],{},"Skip existing events; only yield future ones. Default: false.",[827,1157,1158,1163,1167],{},[845,1159,1160],{},[535,1161,1162],{},"signal",[845,1164,1165],{},[535,1166,607],{},[845,1168,1169],{},"Stop tailing when aborted.",[526,1171,1172,1173,1178],{},"All ",[530,1174,1176],{"href":1175},"#options",[535,1177,590],{}," options also apply.",[638,1180,1182],{"id":1181},"use-cases","Use cases",[572,1184,1185,1191,1194,1204],{},[575,1186,1187,1188,1190],{},"A local Electron \u002F Tauri dashboard reading ",[535,1189,541],{}," from a target project directory",[575,1192,1193],{},"A CI report aggregator that scans logs after a test run",[575,1195,1196,1197,1200,1201],{},"A ",[535,1198,1199],{},"grep","-style CLI that pipes filtered events into ",[535,1202,1203],{},"jq",[575,1205,1206,1207],{},"Replaying historic events into a dashboard before switching to a live in-process subscription. See the ",[530,1208,1210],{"href":1209},"\u002Fextend\u002Fconsumer-recipes#3-replay-history-then-go-live","replay-then-live recipe",[1212,1213,1214],"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":648,"searchDepth":685,"depth":685,"links":1216},[1217,1220,1223],{"id":640,"depth":685,"text":641,"children":1218},[1219],{"id":819,"depth":692,"text":331},{"id":926,"depth":685,"text":927,"children":1221},[1222],{"id":1110,"depth":692,"text":1111},{"id":1181,"depth":685,"text":1182},"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":455,"icon":458},{"title":455,"description":1224},"hip7SEWxeeu5DMPk0t0UWw-70GfCvrAeqjgm7ysLBmE",[1232,1234],{"title":450,"path":451,"stem":452,"description":1233,"icon":453,"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":401,"path":460,"stem":461,"description":1235,"icon":462,"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.",1785609806059]