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Call ",[534,626,627],{},"telemetry.set()"," only when you have extra counters — numbers and booleans by default. Raw ",[534,630,631],{},"argv"," is never read; disclosure is generated from your runtime config so it cannot drift from what you actually collect.",[634,635,638,641,787],"prompt",{":actions":636,"description":637,"icon":107},"[\"copy\",\"cursor\",\"claude\"]","Add anonymous telemetry to my CLI or script",[531,639,640],{},"Add privacy-respecting telemetry to my CLI, script, or GitHub Action with @evlog\u002Ftelemetry.",[642,643,644,660,667,681,691,709,719,732,738,749,760],"ul",{},[645,646,647,648,651,652,655,656,659],"li",{},"Detect my entrypoint: citty CLI (",[534,649,650],{},"withTelemetry","), standalone script (",[534,653,654],{},"createTelemetry","), or GitHub Actions (",[534,657,658],{},"createGitHubActionsTelemetry",")",[645,661,662,663,666],{},"Install: ",[534,664,665],{},"pnpm add @evlog\u002Ftelemetry"," (or npm\u002Fyarn\u002Fbun)",[645,668,669,670,673,674,677,678],{},"Citty: wrap the root command in ",[534,671,672],{},"withTelemetry()"," in ",[534,675,676],{},"src\u002Findex.ts"," and add ",[534,679,680],{},"defineTelemetryCommands({ name: TOOL })",[645,682,683,684,687,688],{},"Script \u002F migrator: ",[534,685,686],{},"createTelemetry({ name, version })"," and wrap each logical unit with ",[534,689,690],{},"t.run('command', fn)",[645,692,693,694,697,698,701,702,705,706],{},"GitHub Actions: ",[534,695,696],{},"createGitHubActionsTelemetry()"," — only ",[534,699,700],{},"GITHUB_ACTION"," \u002F ",[534,703,704],{},"GITHUB_EVENT_NAME"," are injected into ",[534,707,708],{},"custom",[645,710,711,712,701,715,718],{},"Declare ",[534,713,714],{},"collect.flags",[534,716,717],{},"collect.fields"," for any string values you need beyond presence-only capture",[645,720,721,722,724,725,727,728],{},"Put your product schema in ",[534,723,708],{}," via ",[534,726,627],{}," — see ",[539,729,731],{"href":730},"\u002Fuse-cases\u002Ftelemetry\u002Freference#extending-the-schema","Extending the schema",[645,733,734,735,737],{},"Call ",[534,736,627],{}," for business counters (numbers\u002Fbooleans) inside handlers or helpers on the same async stack",[645,739,740,741,744,745,748],{},"Run ",[534,742,743],{},"generateDisclosure()"," and commit ",[534,746,747],{},"TELEMETRY.md"," beside the tool",[645,750,751,752,755,756,759],{},"Bake an ingestion URL in ",[534,753,754],{},"endpoint"," (or ",[534,757,758],{},"EVLOG_TELEMETRY_ENDPOINT",") — the local outbox is a buffer, not the destination",[645,761,762,763,766,767,770,771,774,775,778,779,782,783,786],{},"Ship ",[534,764,765],{},"POST \u002Fapi\u002Ftelemetry\u002Fingest"," on my app: use ",[534,768,769],{},"parseIngestBody()"," from ",[534,772,773],{},"@evlog\u002Ftelemetry\u002Fingest"," with ",[534,776,777],{},"allowedTools"," + ",[534,780,781],{},"allowedCustomKeys",", dedupe on ",[534,784,785],{},"idempotencyKey",", return 204 on success",[531,788,789,790],{},"Docs: ",[539,791,792],{"href":792,"rel":793},"https:\u002F\u002Fwww.evlog.dev\u002Fuse-cases\u002Ftelemetry\u002Foverview",[543],[795,796,798],"h2",{"id":797},"from-cli-to-your-backend","From CLI to your backend",[531,800,801,802,805,806,809,810,813],{},"The disk outbox (",[534,803,804],{},"~\u002F.config\u002F{toolName}\u002Ftelemetry\u002Foutbox.ndjson",") is a ",[547,807,808],{},"reliability buffer",", not where telemetry lives long-term. Each run appends one event locally, then the HTTP drain POSTs the backlog to ",[547,811,812],{},"your"," ingestion endpoint. Short-lived CI jobs and offline machines drain on the next invocation.",[815,816,817,827,838,846,856,866,875],"ol",{},[645,818,819,822,823,826],{},[547,820,821],{},"Run"," — ",[534,824,825],{},"my-tool doctor"," executes on the user's machine",[645,828,829,822,832,834,835],{},[547,830,831],{},"Capture",[534,833,536],{}," sanitizes flags, checks consent, and records one ",[534,836,837],{},"RunEvent",[645,839,840,843,844],{},[547,841,842],{},"Buffer"," — the event appends to ",[534,845,804],{},[645,847,848,851,852,855],{},[547,849,850],{},"Send"," — on flush, POST ",[534,853,854],{},"{ events: RunEvent[] }"," to your ingest URL",[645,857,858,822,861,863,864,659],{},[547,859,860],{},"Validate",[534,862,769],{}," allowlists tools and custom keys (",[539,865,422],{"href":423},[645,867,868,871,872,874],{},[547,869,870],{},"Store"," — dedupe on ",[534,873,785],{},", then DB \u002F warehouse \u002F evlog drain",[645,876,877,880,881,884],{},[547,878,879],{},"Ack"," — on ",[534,882,883],{},"2xx",", delivered keys are removed from the outbox",[555,886,891],{"className":887,"code":889,"language":890,"meta":561},[888],"language-text","CLI → @evlog\u002Ftelemetry → outbox.ndjson → POST \u002Fingest → validate → store\n","text",[534,892,889],{"__ignoreMap":561},[531,894,895],{},"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).",[795,897,899],{"id":898},"why-install-it","Why install it",[531,901,902],{},"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.",[904,905,907],"h3",{"id":906},"what-you-get-for-28-kb","What you get for ~28 KB",[909,910,911,922],"table",{},[912,913,914],"thead",{},[915,916,917,920],"tr",{},[918,919],"th",{},[918,921],{},[923,924,925,942,957,977],"tbody",{},[915,926,927,933],{},[928,929,930],"td",{},[547,931,932],{},"Published size",[928,934,935,936,938,939,941],{},"~28 KB ESM (",[534,937,536],{},"), ~8.6 KB gzip — standalone, no dependency on ",[534,940,544],{}," core",[915,943,944,949],{},[928,945,946],{},[547,947,948],{},"Server ingest only",[928,950,951,953,954,956],{},[534,952,773],{}," ~5 KB (~1.7 KB gzip) — ",[534,955,769],{}," without pulling citty wiring into your API",[915,958,959,964],{},[928,960,961],{},[547,962,963],{},"Runtime deps",[928,965,966,778,969,972,973,976],{},[534,967,968],{},"citty",[534,970,971],{},"std-env"," only — both ",[534,974,975],{},"sideEffects: false",", tree-shakeable ESM",[915,978,979,984],{},[928,980,981],{},[547,982,983],{},"Node",[928,985,986,987,989],{},"18+ · ESM · ",[534,988,975],{}," on the package",[904,991,993],{"id":992},"fits-wherever-your-code-runs","Fits wherever your code runs",[909,995,996,1009],{},[912,997,998],{},[915,999,1000,1003,1006],{},[918,1001,1002],{},"Surface",[918,1004,1005],{},"Entry",[918,1007,1008],{},"Lines of integration",[923,1010,1011,1029,1047,1068],{},[915,1012,1013,1018,1023],{},[928,1014,1015],{},[547,1016,1017],{},"citty CLI",[928,1019,1020,1022],{},[534,1021,672],{}," on the root command",[928,1024,1025,1026],{},"One wrapper + optional ",[534,1027,1028],{},"defineTelemetryCommands()",[915,1030,1031,1036,1044],{},[928,1032,1033],{},[547,1034,1035],{},"Script \u002F migrator",[928,1037,1038,778,1041],{},[534,1039,1040],{},"createTelemetry()",[534,1042,1043],{},"t.run()",[928,1045,1046],{},"Wrap each logical run",[915,1048,1049,1054,1058],{},[928,1050,1051],{},[547,1052,1053],{},"GitHub Actions",[928,1055,1056],{},[534,1057,696],{},[928,1059,1060,1061,701,1064,1067],{},"Same as script; ",[534,1062,1063],{},"ghaAction",[534,1065,1066],{},"ghaEvent"," auto-injected",[915,1069,1070,1075,1081],{},[928,1071,1072],{},[547,1073,1074],{},"Your API (ingest)",[928,1076,1077,770,1079],{},[534,1078,769],{},[534,1080,773],{},[928,1082,1083],{},"One validator + one POST route",[531,1085,1086,1087,1090],{},"No framework lock-in. No PostHog \u002F Segment \u002F custom analytics SDK. No second schema to maintain — disclosure is generated from the same ",[534,1088,1089],{},"collect"," config the CLI uses at runtime.",[904,1092,1094],{"id":1093},"what-you-skip-building","What you skip building",[642,1096,1097,1102,1111,1114,1122,1125,1131,1134],{},[645,1098,1099,1100,659],{},"Privacy-safe flag capture (never reads raw ",[534,1101,631],{},[645,1103,1104,701,1107,1110],{},[534,1105,1106],{},"DO_NOT_TRACK",[534,1108,1109],{},"EVLOG_TELEMETRY"," \u002F persisted opt-out with outbox purge",[645,1112,1113],{},"Disk outbox with lockfile, stale-lock recovery, and backlog drain",[645,1115,1116,1117,778,1119,659],{},"Auto-generated disclosure (",[534,1118,747],{},[534,1120,1121],{},"telemetry status",[645,1123,1124],{},"First-run notice with opt-out instructions",[645,1126,1127,1128,1130],{},"Typed ",[534,1129,627],{}," with allowlisted string fields",[645,1132,1133],{},"Server-side ingest validation aligned with the CLI envelope",[645,1135,1136,1137],{},"Hard guarantee: ",[547,1138,1139],{},"telemetry never throws, never blocks exit",[904,1141,1143],{"id":1142},"the-payoff","The payoff",[531,1145,1146],{},"Once ingest is live you can answer product questions that CLI authors usually guess at:",[642,1148,1149,1160,1171,1178,1185],{},[645,1150,1151,1152,1154,1155,1154,1158,659],{},"Which commands are actually used (",[534,1153,114],{}," vs ",[534,1156,1157],{},"sync",[534,1159,1121],{},[645,1161,1162,1163,1166,1167,1170],{},"Where runs fail (",[534,1164,1165],{},"outcome",", ",[534,1168,1169],{},"errorCode",", version breakdown)",[645,1172,1173,1174,1177],{},"How long operations take (",[534,1175,1176],{},"durationMs"," per command)",[645,1179,1180,1181,1184],{},"Which versions are still in the wild (",[534,1182,1183],{},"tool.version"," on every event)",[645,1186,1187,1188,1166,1191,1166,1194,659],{},"Whether CI or local dev dominates (",[534,1189,1190],{},"env.ci",[534,1192,1193],{},"env.agent",[534,1195,1196],{},"env.tty",[531,1198,1199],{},"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.",[1201,1202,1205,1206,822,1213,1166,1216,1219,1220,1222],"callout",{"color":1203,"icon":1204},"neutral","i-lucide-package","Try it locally: ",[539,1207,1210],{"href":1208,"rel":1209},"https:\u002F\u002Fgithub.com\u002FHugoRCD\u002Fevlog\u002Ftree\u002Fmain\u002Fexamples\u002Ftelemetry-playground",[543],[534,1211,1212],{},"examples\u002Ftelemetry-playground",[534,1214,1215],{},"pnpm run cli -- doctor",[534,1217,1218],{},"EVLOG_TELEMETRY_DEBUG=1"," to inspect payloads, ",[534,1221,1121],{}," for disclosure.",[795,1224,1226],{"id":1225},"see-also","See also",[642,1228,1229,1234,1239,1244,1250],{},[645,1230,1231,1233],{},[539,1232,417],{"href":418}," — citty, scripts, GitHub Actions, delivery config",[645,1235,1236,1238],{},[539,1237,422],{"href":423}," — server endpoint, validation, storage",[645,1240,1241,1243],{},[539,1242,427],{"href":428}," — envelope, schema extensions, disclosure, consent",[645,1245,1246,1249],{},[539,1247,1248],{"href":384},"Audit"," — wide events for security-sensitive actions",[645,1251,1252,1254],{},[539,1253,491],{"href":492}," — forward ingested events into Axiom, Datadog, OTLP, or a custom store",[1256,1257,1258],"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":561,"searchDepth":1260,"depth":1260,"links":1261},2,[1262,1263,1270],{"id":797,"depth":1260,"text":798},{"id":898,"depth":1260,"text":899,"children":1264},[1265,1267,1268,1269],{"id":906,"depth":1266,"text":907},3,{"id":992,"depth":1266,"text":993},{"id":1093,"depth":1266,"text":1094},{"id":1142,"depth":1266,"text":1143},{"id":1225,"depth":1260,"text":1226},"Wide-event telemetry for CLIs and automation — evlog's one-event-per-run model for tools on user machines, with privacy-safe flags, consent, outbox, and auto-generated disclosure.","md",[1274,1276,1277],{"label":417,"icon":420,"to":418,"color":1203,"variant":1275},"subtle",{"label":422,"icon":425,"to":423,"color":1203,"variant":1275},{"label":427,"icon":79,"to":428,"color":1203,"variant":1275},{},{"title":36,"icon":39},{"title":119,"description":1271},"9jh5Kgt4J5jpYeo833BTabRU5EVVS8x7g-W_bp24kEA",[1283,1285],{"title":406,"path":407,"stem":408,"description":1284,"icon":79,"children":-1},"File system, Axiom, and Postgres recipes for audit logs, plus mockAudit for tests and the full API reference.",{"title":417,"path":418,"stem":419,"description":1286,"icon":420,"children":-1},"Wire @evlog\u002Ftelemetry into citty CLIs, standalone scripts, and GitHub Actions — delivery config, automatic flag capture, telemetry.set(), and debug mode.",1785674475652]