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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":124,"body":614,"description":1361,"extension":1362,"links":1363,"meta":1368,"navigation":1369,"path":423,"seo":1370,"stem":424,"__hash__":1371},"docs\u002F5.use-cases\u002F4.telemetry\u002F01.overview.md",{"type":615,"value":616,"toc":1349},"minimark",[617,638,709,720,885,890,905,976,984,987,991,994,999,1081,1085,1175,1182,1186,1231,1235,1238,1288,1291,1313,1317,1345],[618,619,620,624,625,632,633,637],"p",{},[621,622,623],"code",{},"@evlog\u002Ftelemetry"," brings ",[626,627,631],"a",{"href":628,"rel":629},"https:\u002F\u002Fevlog.dev",[630],"nofollow","evlog","'s wide-event model to tools that run on other people's machines: CLIs, GitHub Actions, dev scripts, and CI jobs. Same philosophy as HTTP logging: ",[634,635,636],"strong",{},"one command execution → one structured event",", not a stream of analytics calls.",[639,640,641,666,680,694],"code-group",{},[642,643,649],"pre",{"className":644,"code":645,"filename":646,"language":647,"meta":648,"style":648},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add @evlog\u002Ftelemetry\n","pnpm","bash","",[621,650,651],{"__ignoreMap":648},[652,653,656,659,663],"span",{"class":654,"line":655},"line",1,[652,657,646],{"class":658},"sBMFI",[652,660,662],{"class":661},"sfazB"," add",[652,664,665],{"class":661}," @evlog\u002Ftelemetry\n",[642,667,670],{"className":644,"code":668,"filename":669,"language":647,"meta":648,"style":648},"bun add @evlog\u002Ftelemetry\n","bun",[621,671,672],{"__ignoreMap":648},[652,673,674,676,678],{"class":654,"line":655},[652,675,669],{"class":658},[652,677,662],{"class":661},[652,679,665],{"class":661},[642,681,684],{"className":644,"code":682,"filename":683,"language":647,"meta":648,"style":648},"yarn add @evlog\u002Ftelemetry\n","yarn",[621,685,686],{"__ignoreMap":648},[652,687,688,690,692],{"class":654,"line":655},[652,689,683],{"class":658},[652,691,662],{"class":661},[652,693,665],{"class":661},[642,695,698],{"className":644,"code":696,"filename":697,"language":647,"meta":648,"style":648},"npm install @evlog\u002Ftelemetry\n","npm",[621,699,700],{"__ignoreMap":648},[652,701,702,704,707],{"class":654,"line":655},[652,703,697],{"class":658},[652,705,706],{"class":661}," install",[652,708,665],{"class":661},[618,710,711,712,715,716,719],{},"You get command name, sanitized flags, duration, and outcome automatically. Call ",[621,713,714],{},"telemetry.set()"," only when you have extra counters, numbers and booleans by default. Raw ",[621,717,718],{},"argv"," is never read; disclosure is generated from your runtime config so it cannot drift from what you actually collect.",[721,722,725,728,878],"prompt",{":actions":723,"description":724,"icon":112},"[\"copy\",\"cursor\",\"claude\"]","Add anonymous telemetry to my CLI or script",[618,726,727],{},"Add privacy-respecting telemetry to my CLI, script, or GitHub Action with @evlog\u002Ftelemetry.",[729,730,731,747,754,768,778,796,810,823,829,840,851],"ul",{},[732,733,734,735,738,739,742,743,746],"li",{},"Detect my entrypoint: citty CLI (",[621,736,737],{},"withTelemetry","), standalone script (",[621,740,741],{},"createTelemetry","), or GitHub Actions (",[621,744,745],{},"createGitHubActionsTelemetry",")",[732,748,749,750,753],{},"Install: ",[621,751,752],{},"pnpm add @evlog\u002Ftelemetry"," (or npm\u002Fyarn\u002Fbun)",[732,755,756,757,760,761,764,765],{},"Citty: wrap the root command in ",[621,758,759],{},"withTelemetry()"," in ",[621,762,763],{},"src\u002Findex.ts"," and add ",[621,766,767],{},"defineTelemetryCommands({ name: TOOL })",[732,769,770,771,774,775],{},"Script \u002F migrator: ",[621,772,773],{},"createTelemetry({ name, version })"," and wrap each logical unit with ",[621,776,777],{},"t.run('command', fn)",[732,779,780,781,784,785,788,789,792,793],{},"GitHub Actions: ",[621,782,783],{},"createGitHubActionsTelemetry()",". Only ",[621,786,787],{},"GITHUB_ACTION"," \u002F ",[621,790,791],{},"GITHUB_EVENT_NAME"," are injected into ",[621,794,795],{},"custom",[732,797,798,799,788,802,805,806,809],{},"Declare ",[621,800,801],{},"collect.flags",[621,803,804],{},"collect.fields"," for any string values you need beyond the ",[621,807,808],{},"\"\u003Cset>\""," marker",[732,811,812,813,815,816,818,819],{},"Put your product schema in ",[621,814,795],{}," via ",[621,817,714],{},", see ",[626,820,822],{"href":821},"\u002Fuse-cases\u002Ftelemetry\u002Freference#extending-the-schema","Extending the schema",[732,824,825,826,828],{},"Call ",[621,827,714],{}," for business counters (numbers\u002Fbooleans) inside handlers or helpers on the same async stack",[732,830,831,832,835,836,839],{},"Run ",[621,833,834],{},"generateDisclosure()"," and commit ",[621,837,838],{},"TELEMETRY.md"," beside the tool",[732,841,842,843,846,847,850],{},"Bake an ingestion URL in ",[621,844,845],{},"endpoint"," (or ",[621,848,849],{},"EVLOG_TELEMETRY_ENDPOINT","). The local outbox is a buffer, not the destination",[732,852,853,854,857,858,861,862,865,866,869,870,873,874,877],{},"Ship ",[621,855,856],{},"POST \u002Fapi\u002Ftelemetry\u002Fingest"," on my app: use ",[621,859,860],{},"parseIngestBody()"," from ",[621,863,864],{},"@evlog\u002Ftelemetry\u002Fingest"," with ",[621,867,868],{},"allowedTools"," + ",[621,871,872],{},"allowedCustomKeys",", dedupe on ",[621,875,876],{},"idempotencyKey",", return 204 on success",[618,879,880,881],{},"Docs: ",[626,882,883],{"href":883,"rel":884},"https:\u002F\u002Fwww.evlog.dev\u002Fuse-cases\u002Ftelemetry\u002Foverview",[630],[886,887,889],"h2",{"id":888},"from-cli-to-your-backend","From CLI to your backend",[618,891,892,893,896,897,900,901,904],{},"The disk outbox (",[621,894,895],{},"~\u002F.config\u002F{toolName}\u002Ftelemetry\u002Foutbox.ndjson",") is a ",[634,898,899],{},"reliability buffer",", not where telemetry lives long-term. Each run appends one event locally, then the HTTP drain POSTs the backlog to ",[634,902,903],{},"your"," ingestion endpoint. Short-lived CI jobs and offline machines drain on the next invocation.",[906,907,908,918,929,937,947,957,966],"ol",{},[732,909,910,913,914,917],{},[634,911,912],{},"Run",": ",[621,915,916],{},"my-tool doctor"," executes on the user's machine",[732,919,920,913,923,925,926],{},[634,921,922],{},"Capture",[621,924,623],{}," sanitizes flags, checks consent, and records one ",[621,927,928],{},"RunEvent",[732,930,931,934,935],{},[634,932,933],{},"Buffer",": the event appends to ",[621,936,895],{},[732,938,939,942,943,946],{},[634,940,941],{},"Send",": on flush, POST ",[621,944,945],{},"{ events: RunEvent[] }"," to your ingest URL",[732,948,949,913,952,954,955,746],{},[634,950,951],{},"Validate",[621,953,860],{}," allowlists tools and custom keys (",[626,956,431],{"href":432},[732,958,959,962,963,965],{},[634,960,961],{},"Store",": dedupe on ",[621,964,876],{},", then DB \u002F warehouse \u002F evlog drain",[732,967,968,971,972,975],{},[634,969,970],{},"Ack",": on ",[621,973,974],{},"2xx",", delivered keys are removed from the outbox",[642,977,982],{"className":978,"code":980,"language":981,"meta":648},[979],"language-text","CLI → @evlog\u002Ftelemetry → outbox.ndjson → POST \u002Fingest → validate → store\n","text",[621,983,980],{"__ignoreMap":648},[618,985,986],{},"Nothing is sent until you configure an endpoint and the server returns a success status. Until then, events stay in the outbox (or are purged on opt-out).",[886,988,990],{"id":989},"why-install-it","Why install it",[618,992,993],{},"You can wire anonymous usage telemetry yourself: outbox file, consent flags, flag sanitization, disclosure markdown, ingest validation, first-run notice. Or you add one dependency and get the evlog playbook baked in.",[995,996,998],"h3",{"id":997},"what-you-get-for-28-kb","What you get for ~28 KB",[1000,1001,1002,1013],"table",{},[1003,1004,1005],"thead",{},[1006,1007,1008,1011],"tr",{},[1009,1010],"th",{},[1009,1012],{},[1014,1015,1016,1033,1048,1068],"tbody",{},[1006,1017,1018,1024],{},[1019,1020,1021],"td",{},[634,1022,1023],{},"Published size",[1019,1025,1026,1027,1029,1030,1032],{},"~28 KB ESM (",[621,1028,623],{},"), ~8.6 KB gzip — standalone, no dependency on ",[621,1031,631],{}," core",[1006,1034,1035,1040],{},[1019,1036,1037],{},[634,1038,1039],{},"Server ingest only",[1019,1041,1042,1044,1045,1047],{},[621,1043,864],{}," ~5 KB (~1.7 KB gzip) — ",[621,1046,860],{}," without pulling citty wiring into your API",[1006,1049,1050,1055],{},[1019,1051,1052],{},[634,1053,1054],{},"Runtime deps",[1019,1056,1057,869,1060,1063,1064,1067],{},[621,1058,1059],{},"citty",[621,1061,1062],{},"std-env"," only — both ",[621,1065,1066],{},"sideEffects: false",", tree-shakeable ESM",[1006,1069,1070,1075],{},[1019,1071,1072],{},[634,1073,1074],{},"Node",[1019,1076,1077,1078,1080],{},"18+ · ESM · ",[621,1079,1066],{}," on the package",[995,1082,1084],{"id":1083},"fits-wherever-your-code-runs","Fits wherever your code runs",[1000,1086,1087,1100],{},[1003,1088,1089],{},[1006,1090,1091,1094,1097],{},[1009,1092,1093],{},"Surface",[1009,1095,1096],{},"Entry",[1009,1098,1099],{},"Lines of integration",[1014,1101,1102,1120,1138,1159],{},[1006,1103,1104,1109,1114],{},[1019,1105,1106],{},[634,1107,1108],{},"citty CLI",[1019,1110,1111,1113],{},[621,1112,759],{}," on the root command",[1019,1115,1116,1117],{},"One wrapper + optional ",[621,1118,1119],{},"defineTelemetryCommands()",[1006,1121,1122,1127,1135],{},[1019,1123,1124],{},[634,1125,1126],{},"Script \u002F migrator",[1019,1128,1129,869,1132],{},[621,1130,1131],{},"createTelemetry()",[621,1133,1134],{},"t.run()",[1019,1136,1137],{},"Wrap each logical run",[1006,1139,1140,1145,1149],{},[1019,1141,1142],{},[634,1143,1144],{},"GitHub Actions",[1019,1146,1147],{},[621,1148,783],{},[1019,1150,1151,1152,788,1155,1158],{},"Same as script; ",[621,1153,1154],{},"ghaAction",[621,1156,1157],{},"ghaEvent"," auto-injected",[1006,1160,1161,1166,1172],{},[1019,1162,1163],{},[634,1164,1165],{},"Your API (ingest)",[1019,1167,1168,861,1170],{},[621,1169,860],{},[621,1171,864],{},[1019,1173,1174],{},"One validator + one POST route",[618,1176,1177,1178,1181],{},"No framework lock-in. No PostHog \u002F Segment \u002F custom analytics SDK. No second schema to maintain, since disclosure is generated from the same ",[621,1179,1180],{},"collect"," config the CLI uses at runtime.",[995,1183,1185],{"id":1184},"what-you-skip-building","What you skip building",[729,1187,1188,1193,1202,1205,1213,1216,1222,1225],{},[732,1189,1190,1191,746],{},"Privacy-safe flag capture (never reads raw ",[621,1192,718],{},[732,1194,1195,788,1198,1201],{},[621,1196,1197],{},"DO_NOT_TRACK",[621,1199,1200],{},"EVLOG_TELEMETRY"," \u002F persisted opt-out with outbox purge",[732,1203,1204],{},"Disk outbox with lockfile, stale-lock recovery, and backlog drain",[732,1206,1207,1208,869,1210,746],{},"Auto-generated disclosure (",[621,1209,838],{},[621,1211,1212],{},"telemetry status",[732,1214,1215],{},"First-run notice with opt-out instructions",[732,1217,1218,1219,1221],{},"Typed ",[621,1220,714],{}," with allowlisted string fields",[732,1223,1224],{},"Server-side ingest validation aligned with the CLI envelope",[732,1226,1227,1228],{},"Hard guarantee: ",[634,1229,1230],{},"telemetry never throws, never blocks exit",[995,1232,1234],{"id":1233},"the-payoff","The payoff",[618,1236,1237],{},"Once ingest is live you can answer product questions that CLI authors usually guess at:",[729,1239,1240,1251,1262,1269,1276],{},[732,1241,1242,1243,1245,1246,1245,1249,746],{},"Which commands are actually used (",[621,1244,119],{}," vs ",[621,1247,1248],{},"sync",[621,1250,1212],{},[732,1252,1253,1254,1257,1258,1261],{},"Where runs fail (",[621,1255,1256],{},"outcome",", ",[621,1259,1260],{},"errorCode",", version breakdown)",[732,1263,1264,1265,1268],{},"How long operations take (",[621,1266,1267],{},"durationMs"," per command)",[732,1270,1271,1272,1275],{},"Which versions are still in the wild (",[621,1273,1274],{},"tool.version"," on every event)",[732,1277,1278,1279,1257,1282,1257,1285,746],{},"Whether CI or local dev dominates (",[621,1280,1281],{},"env.ci",[621,1283,1284],{},"env.agent",[621,1286,1287],{},"env.tty",[618,1289,1290],{},"All from one wide event per run, the same mental model as evlog on the server, without bolting a browser analytics stack onto a terminal tool.",[1292,1293,1295,1296,913,1303,1257,1306,1309,1310,1312],"callout",{"color":1294,"icon":461},"neutral","Try it locally: ",[626,1297,1300],{"href":1298,"rel":1299},"https:\u002F\u002Fgithub.com\u002Fevloghq\u002Fevlog\u002Ftree\u002Fmain\u002Fexamples\u002Ftelemetry-playground",[630],[621,1301,1302],{},"examples\u002Ftelemetry-playground",[621,1304,1305],{},"pnpm run cli -- doctor",[621,1307,1308],{},"EVLOG_TELEMETRY_DEBUG=1"," to inspect payloads, ",[621,1311,1212],{}," for disclosure.",[886,1314,1316],{"id":1315},"see-also","See also",[729,1318,1319,1324,1329,1334,1340],{},[732,1320,1321,1323],{},[626,1322,426],{"href":427},": citty, scripts, GitHub Actions, delivery config",[732,1325,1326,1328],{},[626,1327,431],{"href":432},": server endpoint, validation, storage",[732,1330,1331,1333],{},[626,1332,436],{"href":437},": envelope, schema extensions, disclosure, consent",[732,1335,1336,1339],{},[626,1337,1338],{"href":393},"Audit",": wide events for security-sensitive actions",[732,1341,1342,1344],{},[626,1343,544],{"href":545},": forward ingested events into Axiom, Datadog, OTLP, or a custom store",[1346,1347,1348],"style",{},"html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}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":1350,"depth":1350,"links":1351},2,[1352,1353,1360],{"id":888,"depth":1350,"text":889},{"id":989,"depth":1350,"text":990,"children":1354},[1355,1357,1358,1359],{"id":997,"depth":1356,"text":998},3,{"id":1083,"depth":1356,"text":1084},{"id":1184,"depth":1356,"text":1185},{"id":1233,"depth":1356,"text":1234},{"id":1315,"depth":1350,"text":1316},"One event per run for CLIs and automation, with privacy-safe flags, consent, an outbox, and disclosure generated from the same config.","md",[1364,1366,1367],{"label":426,"icon":429,"to":427,"color":1294,"variant":1365},"subtle",{"label":431,"icon":434,"to":432,"color":1294,"variant":1365},{"label":436,"icon":84,"to":437,"color":1294,"variant":1365},{},{"title":41,"icon":44},{"title":124,"description":1361},"Gb7FHqy5yh1KpnsU8Ghkee_rw-LOn-NRxW1nZ6xcYk8",[1373,1375],{"title":415,"path":416,"stem":417,"description":1374,"icon":84,"children":-1},"File system, Axiom, and Postgres recipes for audit logs, plus mockAudit for tests and the full API reference.",{"title":426,"path":427,"stem":428,"description":1376,"icon":429,"children":-1},"Wire @evlog\u002Ftelemetry into citty CLIs, standalone scripts, and GitHub Actions — delivery config, automatic flag capture, telemetry.set(), and debug mode.",1789294025476]