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LogTape","\u002Fcompare\u002Flogtape","9.compare\u002F3.logtape",{"title":605,"path":606,"stem":607,"icon":577},"evlog vs Winston: formats and request events","\u002Fcompare\u002Fwinston","9.compare\u002F4.winston",{"title":609,"path":610,"stem":611,"icon":577},"evlog vs Consola: reporters and request context","\u002Fcompare\u002Fconsola","9.compare\u002F5.consola",{"id":613,"title":614,"body":615,"description":1261,"extension":1262,"links":1263,"meta":1268,"navigation":1269,"path":135,"seo":1270,"stem":136,"__hash__":1271},"docs\u002F3.cli\u002F9.observability-score.md","Observability Score with evlog map",{"type":616,"value":617,"toc":1254},"minimark",[618,627,632,635,646,653,682,685,689,696,707,714,725,729,732,938,941,959,968,1177,1183,1190,1194,1210,1213,1217,1220,1240,1250],[619,620,621,622,626],"p",{},"Before changing your logging, inspect which supported entry points meet evlog's logging checks. ",[623,624,625],"code",{},"evlog map"," reads source files and reports missing context, structured errors, and other recognized patterns. Its score summarizes those static checks, not the percentage of your application that can explain a production failure.",[628,629,631],"h2",{"id":630},"check-the-supported-scope-first","Check the supported scope first",[619,633,634],{},"The CLI currently has adapters for Nuxt, Nitro, Next.js, TanStack Start, and Hono. Run it from the application package, not a monorepo root without a detected framework. An unsupported Node.js project cannot be scored by these adapters.",[619,636,637,638,641,642,645],{},"You can scan a supported project without installing evlog in it. However, checks such as ",[623,639,640],{},"wide-event"," and ",[623,643,644],{},"context"," recognize evlog conventions. Existing Pino or LogTape instrumentation can receive a low score even when it produces useful logs. Use the report to plan evlog adoption, not to rank logging libraries.",[619,647,648,649,652],{},"This command inspects the project without writing ",[623,650,651],{},"evlog.map.json",". The examples on this page were checked with CLI 0.6.2:",[654,655,661],"pre",{"className":656,"code":657,"filename":658,"language":659,"meta":660,"style":660},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","npx @evlog\u002Fcli@0.6.2 map --no-write\n","Terminal","bash","",[623,662,663],{"__ignoreMap":660},[664,665,668,672,676,679],"span",{"class":666,"line":667},"line",1,[664,669,671],{"class":670},"sBMFI","npx",[664,673,675],{"class":674},"sfazB"," @evlog\u002Fcli@0.6.2",[664,677,678],{"class":674}," map",[664,680,681],{"class":674}," --no-write\n",[619,683,684],{},"The scan does not execute handlers or require traffic. It only sees entry points and code patterns its adapter recognizes. Check the detected framework and entry-point count before interpreting the number.",[628,686,688],{"id":687},"read-a-real-report","Read a real report",[619,690,691,692,695],{},"This output comes from the repository's Next.js example at commit ",[623,693,694],{},"42eb1ab2",". It has five detected entry points, two with failed requirements:",[697,698,699],"code-collapse",{},[654,700,705],{"className":701,"code":703,"filename":625,"language":704,"meta":660},[702],"language-text","█▀█ ▀▀█   score \u002F100              evlog-nextjs-example · Next.js\n█▀█   █   ▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▰▱▱▱    5 entry points scanned\n▀▀▀   ▀   good                    ▆▆█▁█\n\nCOVERAGE\n● API handlers       ▰▰▰▰▰▰▰▰▰▱   92  1 of 3 have gaps\n● Pages              ▰▰▰▰▰▰▰▰▱▱   80  1 swallows fetch errors\n● Money & auth       ▰▰▰▰▰▰▰▰▱▱   75  missing audit trails\n\nFIX FIRST\n1. POST   \u002Fapi\u002Fcheckout $ — moves money with no audit trail\n   app\u002Fapi\u002Fcheckout\u002Froute.ts:3 · evlog.dev\u002Fuse-cases\u002Faudit\u002Foverview\n2. PAGE   \u002F — swallows fetch errors — users see a blank page\n   app\u002Fpage.tsx:1 · evlog.dev\u002Flearn\u002Flifecycle\n\n✓ Already solid: \u002Fapi\u002Ferror · \u002Fapi\u002Fhealth\n▲ 87 → 100 by fixing the 2 above\n\n────────────────────────────\nhow this score works → evlog.dev\u002Fcli\u002Fscoring\n▸ evlog map --all every entry point · evlog map \u003Cfile> inspect one\n  --min-score 80 CI gate\n","text",[623,706,703],{"__ignoreMap":660},[619,708,709,710,713],{},"The 87\u002F100 score is a weighted average of checks on those entries. It does not mean 87% of the application's execution paths are covered. ",[623,711,712],{},"FIX FIRST"," highlights requirements to inspect, and the projected 100 means those static requirements would pass. It does not prove delivery to a backend or usefulness during an incident.",[619,715,716,717,721,722,724],{},"The ",[718,719,720],"a",{"href":110},"Scoring reference"," owns the weights, aggregation formula, grades, and sensitivity classification. ",[718,723,104],{"href":105}," explains what each check recognizes.",[628,726,728],{"id":727},"fix-one-context-gap","Fix one context gap",[619,730,731],{},"In a Next.js App Router application with evlog installed, this handler is wrapped for logging but adds no application context:",[654,733,738],{"className":734,"code":735,"filename":736,"language":737,"meta":660,"style":660},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { withEvlog } from 'evlog\u002Fnext'\n\nexport const GET = withEvlog(async (request: Request) => {\n  const name = new URL(request.url).searchParams.get('name') ?? 'world'\n  return Response.json({ message: `Hello ${name}` })\n})\n","app\u002Fapi\u002Fhello\u002Froute.ts, before","typescript",[623,739,740,769,776,823,887,930],{"__ignoreMap":660},[664,741,742,746,750,754,757,760,763,766],{"class":666,"line":667},[664,743,745],{"class":744},"s7zQu","import",[664,747,749],{"class":748},"sMK4o"," {",[664,751,753],{"class":752},"sTEyZ"," withEvlog",[664,755,756],{"class":748}," }",[664,758,759],{"class":744}," from",[664,761,762],{"class":748}," '",[664,764,765],{"class":674},"evlog\u002Fnext",[664,767,768],{"class":748},"'\n",[664,770,772],{"class":666,"line":771},2,[664,773,775],{"emptyLinePlaceholder":774},true,"\n",[664,777,779,782,786,789,792,795,798,801,804,808,811,814,817,820],{"class":666,"line":778},3,[664,780,781],{"class":744},"export",[664,783,785],{"class":784},"spNyl"," const",[664,787,788],{"class":752}," GET ",[664,790,791],{"class":748},"=",[664,793,753],{"class":794},"s2Zo4",[664,796,797],{"class":752},"(",[664,799,800],{"class":784},"async",[664,802,803],{"class":748}," (",[664,805,807],{"class":806},"sHdIc","request",[664,809,810],{"class":748},":",[664,812,813],{"class":670}," Request",[664,815,816],{"class":748},")",[664,818,819],{"class":784}," =>",[664,821,822],{"class":748}," {\n",[664,824,826,829,832,835,838,841,844,846,849,852,854,856,859,861,864,866,869,872,874,877,880,882,885],{"class":666,"line":825},4,[664,827,828],{"class":784},"  const",[664,830,831],{"class":752}," name",[664,833,834],{"class":748}," =",[664,836,837],{"class":748}," new",[664,839,840],{"class":794}," URL",[664,842,797],{"class":843},"swJcz",[664,845,807],{"class":752},[664,847,848],{"class":748},".",[664,850,851],{"class":752},"url",[664,853,816],{"class":843},[664,855,848],{"class":748},[664,857,858],{"class":752},"searchParams",[664,860,848],{"class":748},[664,862,863],{"class":794},"get",[664,865,797],{"class":843},[664,867,868],{"class":748},"'",[664,870,871],{"class":674},"name",[664,873,868],{"class":748},[664,875,876],{"class":843},") ",[664,878,879],{"class":748},"??",[664,881,762],{"class":748},[664,883,884],{"class":674},"world",[664,886,768],{"class":748},[664,888,890,893,896,898,901,903,906,909,911,914,917,920,922,925,927],{"class":666,"line":889},5,[664,891,892],{"class":744},"  return",[664,894,895],{"class":752}," Response",[664,897,848],{"class":748},[664,899,900],{"class":794},"json",[664,902,797],{"class":843},[664,904,905],{"class":748},"{",[664,907,908],{"class":843}," message",[664,910,810],{"class":748},[664,912,913],{"class":748}," `",[664,915,916],{"class":674},"Hello ",[664,918,919],{"class":748},"${",[664,921,871],{"class":752},[664,923,924],{"class":748},"}`",[664,926,756],{"class":748},[664,928,929],{"class":843},")\n",[664,931,933,936],{"class":666,"line":932},6,[664,934,935],{"class":748},"}",[664,937,929],{"class":752},[619,939,940],{},"Inspect that file directly:",[654,942,944],{"className":656,"code":943,"filename":658,"language":659,"meta":660,"style":660},"npx @evlog\u002Fcli@0.6.2 map app\u002Fapi\u002Fhello\u002Froute.ts --no-write\n",[623,945,946],{"__ignoreMap":660},[664,947,948,950,952,954,957],{"class":666,"line":667},[664,949,671],{"class":670},[664,951,675],{"class":674},[664,953,678],{"class":674},[664,955,956],{"class":674}," app\u002Fapi\u002Fhello\u002Froute.ts",[664,958,681],{"class":674},[619,960,716,961,963,964,967],{},[623,962,644],{}," requirement fails because the handler has no recognized ",[623,965,966],{},"set()"," call. Attach a useful decision without recording the user's name:",[654,969,972],{"className":734,"code":970,"filename":971,"language":737,"meta":660,"style":660},"import { useLogger, withEvlog } from 'evlog\u002Fnext'\n\nexport const GET = withEvlog(async (request: Request) => {\n  const log = useLogger()\n  const name = new URL(request.url).searchParams.get('name') ?? 'world'\n  log.set({ greeting: { personalized: name !== 'world' } })\n  return Response.json({ message: `Hello ${name}` })\n})\n","app\u002Fapi\u002Fhello\u002Froute.ts, after",[623,973,974,998,1002,1032,1046,1094,1137,1170],{"__ignoreMap":660},[664,975,976,978,980,983,986,988,990,992,994,996],{"class":666,"line":667},[664,977,745],{"class":744},[664,979,749],{"class":748},[664,981,982],{"class":752}," useLogger",[664,984,985],{"class":748},",",[664,987,753],{"class":752},[664,989,756],{"class":748},[664,991,759],{"class":744},[664,993,762],{"class":748},[664,995,765],{"class":674},[664,997,768],{"class":748},[664,999,1000],{"class":666,"line":771},[664,1001,775],{"emptyLinePlaceholder":774},[664,1003,1004,1006,1008,1010,1012,1014,1016,1018,1020,1022,1024,1026,1028,1030],{"class":666,"line":778},[664,1005,781],{"class":744},[664,1007,785],{"class":784},[664,1009,788],{"class":752},[664,1011,791],{"class":748},[664,1013,753],{"class":794},[664,1015,797],{"class":752},[664,1017,800],{"class":784},[664,1019,803],{"class":748},[664,1021,807],{"class":806},[664,1023,810],{"class":748},[664,1025,813],{"class":670},[664,1027,816],{"class":748},[664,1029,819],{"class":784},[664,1031,822],{"class":748},[664,1033,1034,1036,1039,1041,1043],{"class":666,"line":825},[664,1035,828],{"class":784},[664,1037,1038],{"class":752}," log",[664,1040,834],{"class":748},[664,1042,982],{"class":794},[664,1044,1045],{"class":843},"()\n",[664,1047,1048,1050,1052,1054,1056,1058,1060,1062,1064,1066,1068,1070,1072,1074,1076,1078,1080,1082,1084,1086,1088,1090,1092],{"class":666,"line":889},[664,1049,828],{"class":784},[664,1051,831],{"class":752},[664,1053,834],{"class":748},[664,1055,837],{"class":748},[664,1057,840],{"class":794},[664,1059,797],{"class":843},[664,1061,807],{"class":752},[664,1063,848],{"class":748},[664,1065,851],{"class":752},[664,1067,816],{"class":843},[664,1069,848],{"class":748},[664,1071,858],{"class":752},[664,1073,848],{"class":748},[664,1075,863],{"class":794},[664,1077,797],{"class":843},[664,1079,868],{"class":748},[664,1081,871],{"class":674},[664,1083,868],{"class":748},[664,1085,876],{"class":843},[664,1087,879],{"class":748},[664,1089,762],{"class":748},[664,1091,884],{"class":674},[664,1093,768],{"class":748},[664,1095,1096,1099,1101,1104,1106,1108,1111,1113,1115,1118,1120,1122,1125,1127,1129,1131,1133,1135],{"class":666,"line":932},[664,1097,1098],{"class":752},"  log",[664,1100,848],{"class":748},[664,1102,1103],{"class":794},"set",[664,1105,797],{"class":843},[664,1107,905],{"class":748},[664,1109,1110],{"class":843}," greeting",[664,1112,810],{"class":748},[664,1114,749],{"class":748},[664,1116,1117],{"class":843}," personalized",[664,1119,810],{"class":748},[664,1121,831],{"class":752},[664,1123,1124],{"class":748}," !==",[664,1126,762],{"class":748},[664,1128,884],{"class":674},[664,1130,868],{"class":748},[664,1132,756],{"class":748},[664,1134,756],{"class":748},[664,1136,929],{"class":843},[664,1138,1140,1142,1144,1146,1148,1150,1152,1154,1156,1158,1160,1162,1164,1166,1168],{"class":666,"line":1139},7,[664,1141,892],{"class":744},[664,1143,895],{"class":752},[664,1145,848],{"class":748},[664,1147,900],{"class":794},[664,1149,797],{"class":843},[664,1151,905],{"class":748},[664,1153,908],{"class":843},[664,1155,810],{"class":748},[664,1157,913],{"class":748},[664,1159,916],{"class":674},[664,1161,919],{"class":748},[664,1163,871],{"class":752},[664,1165,924],{"class":748},[664,1167,756],{"class":748},[664,1169,929],{"class":843},[664,1171,1173,1175],{"class":666,"line":1172},8,[664,1174,935],{"class":748},[664,1176,929],{"class":752},[619,1178,1179,1180,1182],{},"Run the same command again. The ",[623,1181,644],{}," requirement now passes, removing its 15-point penalty. In this isolated example the route moves from 85 to 100. In a larger application the global change depends on all scored entries and their weights.",[619,1184,1185,1186,1189],{},"A passing check establishes that the pattern exists. It does not judge whether ",[623,1187,1188],{},"greeting.personalized"," is the field your incident investigation needs. Review the event output and required business fields separately.",[628,1191,1193],{"id":1192},"know-what-a-high-score-leaves-untested","Know what a high score leaves untested",[1195,1196,1197,1201,1204,1207],"ul",{},[1198,1199,1200],"li",{},"Source patterns do not prove runtime execution, complete error-path coverage, or successful delivery to a backend.",[1198,1202,1203],{},"Sensitivity classification uses imports and route paths. Inspect the reported reasons for money, authentication, or personal-data flags.",[1198,1205,1206],{},"The current CLI can show 100 when no scorable entries are found. An empty scan is no evidence of instrumentation, so inspect the count and scope first.",[1198,1208,1209],{},"Logging through wrappers or abstractions the analyzer does not recognize can produce false positives. Look at the code before applying a suggestion.",[619,1211,1212],{},"A high score is useful for checking agreed conventions alongside runtime tests and sampled production events.",[628,1214,1216],{"id":1215},"add-a-ci-gate-after-reviewing-the-baseline","Add a CI gate after reviewing the baseline",[619,1218,1219],{},"Pin the CLI version and keep the analyzed package, configuration, and exclusions consistent. Rule changes can change a score without an application edit.",[619,1221,1222,1223,1225,1226,1229,1230,1232,1233,1235,1236,1239],{},"Commit a reviewed ",[623,1224,651],{}," baseline and use ",[623,1227,1228],{},"--baseline"," to detect recognized requirement or score regressions on existing entries. It does not track every context field: removing one ",[623,1231,966],{}," call may still leave another call that satisfies ",[623,1234,644],{},". New entries also need review. Add ",[623,1237,1238],{},"--min-score"," when you want a floor on the current aggregate score, understanding that an average can hide one weak route.",[619,1241,716,1242,1245,1246,1249],{},[718,1243,1244],{"href":115},"CI guide"," covers exit codes and gate configuration. 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