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OpenTelemetry","\u002Fcompare\u002Fopentelemetry","8.compare\u002F2.opentelemetry",{"title":591,"path":592,"stem":593,"icon":567},"evlog vs LogTape","\u002Fcompare\u002Flogtape","8.compare\u002F3.logtape",{"title":595,"path":596,"stem":597,"icon":567},"evlog vs Winston: formats and request events","\u002Fcompare\u002Fwinston","8.compare\u002F4.winston",{"title":599,"path":600,"stem":601,"icon":567},"evlog vs Consola: reporters and request context","\u002Fcompare\u002Fconsola","8.compare\u002F5.consola",{"id":603,"title":124,"body":604,"description":1352,"extension":1353,"links":1354,"meta":1359,"navigation":1360,"path":423,"seo":1361,"stem":424,"__hash__":1362},"docs\u002F5.use-cases\u002F4.telemetry\u002F01.overview.md",{"type":605,"value":606,"toc":1340},"minimark",[607,628,699,710,875,880,895,966,974,977,981,984,989,1071,1075,1165,1172,1176,1221,1225,1228,1278,1281,1304,1308,1336],[608,609,610,614,615,622,623,627],"p",{},[611,612,613],"code",{},"@evlog\u002Ftelemetry"," brings ",[616,617,621],"a",{"href":618,"rel":619},"https:\u002F\u002Fevlog.dev",[620],"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: ",[624,625,626],"strong",{},"one command execution → one structured event",", not a stream of analytics calls.",[629,630,631,656,670,684],"code-group",{},[632,633,639],"pre",{"className":634,"code":635,"filename":636,"language":637,"meta":638,"style":638},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","pnpm add @evlog\u002Ftelemetry\n","pnpm","bash","",[611,640,641],{"__ignoreMap":638},[642,643,646,649,653],"span",{"class":644,"line":645},"line",1,[642,647,636],{"class":648},"sBMFI",[642,650,652],{"class":651},"sfazB"," add",[642,654,655],{"class":651}," @evlog\u002Ftelemetry\n",[632,657,660],{"className":634,"code":658,"filename":659,"language":637,"meta":638,"style":638},"bun add @evlog\u002Ftelemetry\n","bun",[611,661,662],{"__ignoreMap":638},[642,663,664,666,668],{"class":644,"line":645},[642,665,659],{"class":648},[642,667,652],{"class":651},[642,669,655],{"class":651},[632,671,674],{"className":634,"code":672,"filename":673,"language":637,"meta":638,"style":638},"yarn add @evlog\u002Ftelemetry\n","yarn",[611,675,676],{"__ignoreMap":638},[642,677,678,680,682],{"class":644,"line":645},[642,679,673],{"class":648},[642,681,652],{"class":651},[642,683,655],{"class":651},[632,685,688],{"className":634,"code":686,"filename":687,"language":637,"meta":638,"style":638},"npm install @evlog\u002Ftelemetry\n","npm",[611,689,690],{"__ignoreMap":638},[642,691,692,694,697],{"class":644,"line":645},[642,693,687],{"class":648},[642,695,696],{"class":651}," install",[642,698,655],{"class":651},[608,700,701,702,705,706,709],{},"You get command name, sanitized flags, duration, and outcome automatically. Call ",[611,703,704],{},"telemetry.set()"," only when you have extra counters, numbers and booleans by default. Raw ",[611,707,708],{},"argv"," is never read; disclosure is generated from your runtime config so it cannot drift from what you actually collect.",[711,712,715,718,868],"prompt",{":actions":713,"description":714,"icon":112},"[\"copy\",\"cursor\",\"claude\"]","Add anonymous telemetry to my CLI or script",[608,716,717],{},"Add privacy-respecting telemetry to my CLI, script, or GitHub Action with @evlog\u002Ftelemetry.",[719,720,721,737,744,758,768,786,800,813,819,830,841],"ul",{},[722,723,724,725,728,729,732,733,736],"li",{},"Detect my entrypoint: citty CLI (",[611,726,727],{},"withTelemetry","), standalone script (",[611,730,731],{},"createTelemetry","), or GitHub Actions (",[611,734,735],{},"createGitHubActionsTelemetry",")",[722,738,739,740,743],{},"Install: ",[611,741,742],{},"pnpm add @evlog\u002Ftelemetry"," (or npm\u002Fyarn\u002Fbun)",[722,745,746,747,750,751,754,755],{},"Citty: wrap the root command in ",[611,748,749],{},"withTelemetry()"," in ",[611,752,753],{},"src\u002Findex.ts"," and add ",[611,756,757],{},"defineTelemetryCommands({ name: TOOL })",[722,759,760,761,764,765],{},"Script \u002F migrator: ",[611,762,763],{},"createTelemetry({ name, version })"," and wrap each logical unit with ",[611,766,767],{},"t.run('command', fn)",[722,769,770,771,774,775,778,779,782,783],{},"GitHub Actions: ",[611,772,773],{},"createGitHubActionsTelemetry()",". Only ",[611,776,777],{},"GITHUB_ACTION"," \u002F ",[611,780,781],{},"GITHUB_EVENT_NAME"," are injected into ",[611,784,785],{},"custom",[722,787,788,789,778,792,795,796,799],{},"Declare ",[611,790,791],{},"collect.flags",[611,793,794],{},"collect.fields"," for any string values you need beyond the ",[611,797,798],{},"\"\u003Cset>\""," marker",[722,801,802,803,805,806,808,809],{},"Put your product schema in ",[611,804,785],{}," via ",[611,807,704],{},", see ",[616,810,812],{"href":811},"\u002Fuse-cases\u002Ftelemetry\u002Freference#extending-the-schema","Extending the schema",[722,814,815,816,818],{},"Call ",[611,817,704],{}," for business counters (numbers\u002Fbooleans) inside handlers or helpers on the same async stack",[722,820,821,822,825,826,829],{},"Run ",[611,823,824],{},"generateDisclosure()"," and commit ",[611,827,828],{},"TELEMETRY.md"," beside the tool",[722,831,832,833,836,837,840],{},"Bake an ingestion URL in ",[611,834,835],{},"endpoint"," (or ",[611,838,839],{},"EVLOG_TELEMETRY_ENDPOINT","). The local outbox is a buffer, not the destination",[722,842,843,844,847,848,851,852,855,856,859,860,863,864,867],{},"Ship ",[611,845,846],{},"POST \u002Fapi\u002Ftelemetry\u002Fingest"," on my app: use ",[611,849,850],{},"parseIngestBody()"," from ",[611,853,854],{},"@evlog\u002Ftelemetry\u002Fingest"," with ",[611,857,858],{},"allowedTools"," + ",[611,861,862],{},"allowedCustomKeys",", dedupe on ",[611,865,866],{},"idempotencyKey",", return 204 on success",[608,869,870,871],{},"Docs: ",[616,872,873],{"href":873,"rel":874},"https:\u002F\u002Fwww.evlog.dev\u002Fuse-cases\u002Ftelemetry\u002Foverview",[620],[876,877,879],"h2",{"id":878},"from-cli-to-your-backend","From CLI to your backend",[608,881,882,883,886,887,890,891,894],{},"The disk outbox (",[611,884,885],{},"~\u002F.config\u002F{toolName}\u002Ftelemetry\u002Foutbox.ndjson",") is a ",[624,888,889],{},"reliability buffer",", not where telemetry lives long-term. Each run appends one event locally, then the HTTP drain POSTs the backlog to ",[624,892,893],{},"your"," ingestion endpoint. Short-lived CI jobs and offline machines drain on the next invocation.",[896,897,898,908,919,927,937,947,956],"ol",{},[722,899,900,903,904,907],{},[624,901,902],{},"Run",": ",[611,905,906],{},"my-tool doctor"," executes on the user's machine",[722,909,910,903,913,915,916],{},[624,911,912],{},"Capture",[611,914,613],{}," sanitizes flags, checks consent, and records one ",[611,917,918],{},"RunEvent",[722,920,921,924,925],{},[624,922,923],{},"Buffer",": the event appends to ",[611,926,885],{},[722,928,929,932,933,936],{},[624,930,931],{},"Send",": on flush, POST ",[611,934,935],{},"{ events: RunEvent[] }"," to your ingest URL",[722,938,939,903,942,944,945,736],{},[624,940,941],{},"Validate",[611,943,850],{}," allowlists tools and custom keys (",[616,946,431],{"href":432},[722,948,949,952,953,955],{},[624,950,951],{},"Store",": dedupe on ",[611,954,866],{},", then DB \u002F warehouse \u002F evlog drain",[722,957,958,961,962,965],{},[624,959,960],{},"Ack",": on ",[611,963,964],{},"2xx",", delivered keys are removed from the outbox",[632,967,972],{"className":968,"code":970,"language":971,"meta":638},[969],"language-text","CLI → @evlog\u002Ftelemetry → outbox.ndjson → POST \u002Fingest → validate → store\n","text",[611,973,970],{"__ignoreMap":638},[608,975,976],{},"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).",[876,978,980],{"id":979},"why-install-it","Why install it",[608,982,983],{},"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.",[985,986,988],"h3",{"id":987},"what-you-get-for-28-kb","What you get for ~28 KB",[990,991,992,1003],"table",{},[993,994,995],"thead",{},[996,997,998,1001],"tr",{},[999,1000],"th",{},[999,1002],{},[1004,1005,1006,1023,1038,1058],"tbody",{},[996,1007,1008,1014],{},[1009,1010,1011],"td",{},[624,1012,1013],{},"Published size",[1009,1015,1016,1017,1019,1020,1022],{},"~28 KB ESM (",[611,1018,613],{},"), ~8.6 KB gzip — standalone, no dependency on ",[611,1021,621],{}," core",[996,1024,1025,1030],{},[1009,1026,1027],{},[624,1028,1029],{},"Server ingest only",[1009,1031,1032,1034,1035,1037],{},[611,1033,854],{}," ~5 KB (~1.7 KB gzip) — ",[611,1036,850],{}," without pulling citty wiring into your API",[996,1039,1040,1045],{},[1009,1041,1042],{},[624,1043,1044],{},"Runtime deps",[1009,1046,1047,859,1050,1053,1054,1057],{},[611,1048,1049],{},"citty",[611,1051,1052],{},"std-env"," only — both ",[611,1055,1056],{},"sideEffects: false",", tree-shakeable ESM",[996,1059,1060,1065],{},[1009,1061,1062],{},[624,1063,1064],{},"Node",[1009,1066,1067,1068,1070],{},"18+ · ESM · ",[611,1069,1056],{}," on the package",[985,1072,1074],{"id":1073},"fits-wherever-your-code-runs","Fits wherever your code runs",[990,1076,1077,1090],{},[993,1078,1079],{},[996,1080,1081,1084,1087],{},[999,1082,1083],{},"Surface",[999,1085,1086],{},"Entry",[999,1088,1089],{},"Lines of integration",[1004,1091,1092,1110,1128,1149],{},[996,1093,1094,1099,1104],{},[1009,1095,1096],{},[624,1097,1098],{},"citty CLI",[1009,1100,1101,1103],{},[611,1102,749],{}," on the root command",[1009,1105,1106,1107],{},"One wrapper + optional ",[611,1108,1109],{},"defineTelemetryCommands()",[996,1111,1112,1117,1125],{},[1009,1113,1114],{},[624,1115,1116],{},"Script \u002F migrator",[1009,1118,1119,859,1122],{},[611,1120,1121],{},"createTelemetry()",[611,1123,1124],{},"t.run()",[1009,1126,1127],{},"Wrap each logical run",[996,1129,1130,1135,1139],{},[1009,1131,1132],{},[624,1133,1134],{},"GitHub Actions",[1009,1136,1137],{},[611,1138,773],{},[1009,1140,1141,1142,778,1145,1148],{},"Same as script; ",[611,1143,1144],{},"ghaAction",[611,1146,1147],{},"ghaEvent"," auto-injected",[996,1150,1151,1156,1162],{},[1009,1152,1153],{},[624,1154,1155],{},"Your API (ingest)",[1009,1157,1158,851,1160],{},[611,1159,850],{},[611,1161,854],{},[1009,1163,1164],{},"One validator + one POST route",[608,1166,1167,1168,1171],{},"No framework lock-in. No PostHog \u002F Segment \u002F custom analytics SDK. No second schema to maintain, since disclosure is generated from the same ",[611,1169,1170],{},"collect"," config the CLI uses at runtime.",[985,1173,1175],{"id":1174},"what-you-skip-building","What you skip building",[719,1177,1178,1183,1192,1195,1203,1206,1212,1215],{},[722,1179,1180,1181,736],{},"Privacy-safe flag capture (never reads raw ",[611,1182,708],{},[722,1184,1185,778,1188,1191],{},[611,1186,1187],{},"DO_NOT_TRACK",[611,1189,1190],{},"EVLOG_TELEMETRY"," \u002F persisted opt-out with outbox purge",[722,1193,1194],{},"Disk outbox with lockfile, stale-lock recovery, and backlog drain",[722,1196,1197,1198,859,1200,736],{},"Auto-generated disclosure (",[611,1199,828],{},[611,1201,1202],{},"telemetry status",[722,1204,1205],{},"First-run notice with opt-out instructions",[722,1207,1208,1209,1211],{},"Typed ",[611,1210,704],{}," with allowlisted string fields",[722,1213,1214],{},"Server-side ingest validation aligned with the CLI envelope",[722,1216,1217,1218],{},"Hard guarantee: ",[624,1219,1220],{},"telemetry never throws, never blocks exit",[985,1222,1224],{"id":1223},"the-payoff","The payoff",[608,1226,1227],{},"Once ingest is live you can answer product questions that CLI authors usually guess at:",[719,1229,1230,1241,1252,1259,1266],{},[722,1231,1232,1233,1235,1236,1235,1239,736],{},"Which commands are actually used (",[611,1234,119],{}," vs ",[611,1237,1238],{},"sync",[611,1240,1202],{},[722,1242,1243,1244,1247,1248,1251],{},"Where runs fail (",[611,1245,1246],{},"outcome",", ",[611,1249,1250],{},"errorCode",", version breakdown)",[722,1253,1254,1255,1258],{},"How long operations take (",[611,1256,1257],{},"durationMs"," per command)",[722,1260,1261,1262,1265],{},"Which versions are still in the wild (",[611,1263,1264],{},"tool.version"," on every event)",[722,1267,1268,1269,1247,1272,1247,1275,736],{},"Whether CI or local dev dominates (",[611,1270,1271],{},"env.ci",[611,1273,1274],{},"env.agent",[611,1276,1277],{},"env.tty",[608,1279,1280],{},"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.",[1282,1283,1286,1287,903,1294,1247,1297,1300,1301,1303],"callout",{"color":1284,"icon":1285},"neutral","i-lucide-package","Try it locally: ",[616,1288,1291],{"href":1289,"rel":1290},"https:\u002F\u002Fgithub.com\u002Fevloghq\u002Fevlog\u002Ftree\u002Fmain\u002Fexamples\u002Ftelemetry-playground",[620],[611,1292,1293],{},"examples\u002Ftelemetry-playground",[611,1295,1296],{},"pnpm run cli -- doctor",[611,1298,1299],{},"EVLOG_TELEMETRY_DEBUG=1"," to inspect payloads, ",[611,1302,1202],{}," for disclosure.",[876,1305,1307],{"id":1306},"see-also","See also",[719,1309,1310,1315,1320,1325,1331],{},[722,1311,1312,1314],{},[616,1313,426],{"href":427},": citty, scripts, GitHub Actions, delivery config",[722,1316,1317,1319],{},[616,1318,431],{"href":432},": server endpoint, validation, storage",[722,1321,1322,1324],{},[616,1323,436],{"href":437},": envelope, schema extensions, disclosure, consent",[722,1326,1327,1330],{},[616,1328,1329],{"href":393},"Audit",": wide events for security-sensitive actions",[722,1332,1333,1335],{},[616,1334,534],{"href":535},": forward ingested events into Axiom, Datadog, OTLP, or a custom store",[1337,1338,1339],"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":638,"searchDepth":1341,"depth":1341,"links":1342},2,[1343,1344,1351],{"id":878,"depth":1341,"text":879},{"id":979,"depth":1341,"text":980,"children":1345},[1346,1348,1349,1350],{"id":987,"depth":1347,"text":988},3,{"id":1073,"depth":1347,"text":1074},{"id":1174,"depth":1347,"text":1175},{"id":1223,"depth":1347,"text":1224},{"id":1306,"depth":1341,"text":1307},"One event per run for CLIs and automation, with privacy-safe flags, consent, an outbox, and disclosure generated from the same config.","md",[1355,1357,1358],{"label":426,"icon":429,"to":427,"color":1284,"variant":1356},"subtle",{"label":431,"icon":434,"to":432,"color":1284,"variant":1356},{"label":436,"icon":84,"to":437,"color":1284,"variant":1356},{},{"title":41,"icon":44},{"title":124,"description":1352},"Gb7FHqy5yh1KpnsU8Ghkee_rw-LOn-NRxW1nZ6xcYk8",[1364,1366],{"title":415,"path":416,"stem":417,"description":1365,"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":1367,"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.",1791112778702]