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OpenTelemetry","\u002Fcompare\u002Fopentelemetry","8.compare\u002F2.opentelemetry",{"title":596,"path":597,"stem":598,"icon":572},"evlog vs LogTape","\u002Fcompare\u002Flogtape","8.compare\u002F3.logtape",{"title":600,"path":601,"stem":602,"icon":572},"evlog vs Winston: formats and request events","\u002Fcompare\u002Fwinston","8.compare\u002F4.winston",{"title":604,"path":605,"stem":606,"icon":572},"evlog vs Consola: reporters and request context","\u002Fcompare\u002Fconsola","8.compare\u002F5.consola",{"id":608,"title":324,"body":609,"description":787,"extension":788,"links":789,"meta":798,"navigation":799,"path":329,"seo":800,"stem":330,"__hash__":801},"docs\u002F5.use-cases\u002F0.overview.md",{"type":610,"value":611,"toc":782},"minimark",[612,621,734,739,749,752,756],[613,614,615,616,620],"p",{},"Use Cases are ",[617,618,619],"strong",{},"recipes",", not features. Each one solves a specific problem with the same evlog primitives you already know: wide events, structured errors, drains, enrichers. They live as their own section because they have enough surface area (multiple pages each, dedicated examples) to deserve direct navigation, but they're not a separate runtime: same logger, same drain pipeline, same types.",[622,623,624,637],"table",{},[625,626,627],"thead",{},[628,629,630,634],"tr",{},[631,632,633],"th",{},"You want to…",[631,635,636],{},"See",[638,639,640,651,665,674,683,692,701,710,725],"tbody",{},[628,641,642,646],{},[643,644,645],"td",{},"Follow a Node.js request from response ID to a JSON event, including a failed payment",[643,647,648],{},[649,650,455],"a",{"href":456},[628,652,653,661],{},[643,654,655,656,660],{},"Send browser logs to your server with batching, retries, and ",[657,658,659],"code",{},"sendBeacon"," fallback",[643,662,663],{},[649,664,332],{"href":333},[628,666,667,670],{},[643,668,669],{},"Capture every AI SDK call with token usage, tool calls, streaming metrics, and cost",[643,671,672],{},[649,673,337],{"href":343},[628,675,676,679],{},[643,677,678],{},"Identify the authenticated user (and their org \u002F role) on every wide event",[643,680,681],{},[649,682,365],{"href":371},[628,684,685,688],{},[643,686,687],{},"Build a tamper-evident audit trail with hash chains, denials, redaction-aware diffs",[643,689,690],{},[649,691,392],{"href":398},[628,693,694,697],{},[643,695,696],{},"Instrument CLIs and automation with one wide event per run, consent, and disclosure",[643,698,699],{},[649,700,361],{"href":428},[628,702,703,706],{},[643,704,705],{},"Ask a decision model one question per event and keep the 200s that were silent failures",[643,707,708],{},[649,709,459],{"href":465},[628,711,712,721],{},[643,713,714,715,720],{},"Export wide events from ",[649,716,450],{"href":717,"rel":718},"https:\u002F\u002Feve.dev",[719],"nofollow"," agent turns (tokens, tools, drains)",[643,722,723],{},[649,724,450],{"href":451},[628,726,727,730],{},[643,728,729],{},"Add derived context (User-Agent, geo, request size, trace context) to every event",[643,731,732],{},[649,733,445],{"href":446},[735,736,738],"h2",{"id":737},"how-they-relate","How they relate",[740,741,747],"pre",{"className":742,"code":744,"language":745,"meta":746},[743],"language-text","your app code\n     │\n     ▼\n┌──────────────────────────────────────────────────────────────────┐\n│   evlog logger                                                   │\n│                                                                  │\n│   ┌─────────────────┐   ┌─────────────────┐   ┌──────────────┐   │\n│   │ Client logs     │   │ AI SDK wrapper  │   │ Audit logger │   │\n│   │ (browser → API) │   │ (token \u002F tools) │   │ (hash chain) │   │\n│   └─────────────────┘   └─────────────────┘   └──────────────┘   │\n│            │                     │                    │          │\n│            └─────────────────────┼────────────────────┘          │\n│                                  ▼                               │\n│                       enrich  →  drain                           │\n│                       (User-Agent, geo, trace, …)                │\n└──────────────────────────────────────────────────────────────────┘\n","text","",[657,748,744],{"__ignoreMap":746},[613,750,751],{},"Every use case is opt-in. Adopt the ones your application needs. They coexist in the same logger, the same drain pipeline, and the same enrich chain.",[735,753,755],{"id":754},"where-to-go-next","Where to go next",[757,758,759,766,773],"ul",{},[760,761,762,763,765],"li",{},"Building a new use case from scratch? Start with ",[649,764,51],{"href":52}," for the conceptual model.",[760,767,768,769,772],{},"Need to send the resulting events somewhere? Pick an ",[649,770,771],{"href":158},"adapter",".",[760,774,775,776,779,780,772],{},"Want to write your own use case as a reusable enricher \u002F plugin? See ",[649,777,778],{"href":522},"Custom Enrichers"," or ",[649,781,517],{"href":518},{"title":746,"searchDepth":783,"depth":783,"links":784},2,[785,786],{"id":737,"depth":783,"text":738},{"id":754,"depth":783,"text":755},"Recipes that each solve one problem: browser logs, AI SDK calls, user identity, a tamper-evident audit trail, tool telemetry, derived context.","md",[790,794,795,796,797],{"label":332,"icon":791,"to":333,"color":792,"variant":793},"i-lucide-globe","neutral","subtle",{"label":337,"icon":338,"to":343,"color":792,"variant":793},{"label":392,"icon":393,"to":398,"color":792,"variant":793},{"label":361,"icon":117,"to":428,"color":792,"variant":793},{"label":459,"icon":460,"to":465,"color":792,"variant":793},{},{"title":41,"icon":112},{"title":324,"description":787},"4GQj3btaZ8fbiMoEMA66jVIKjDGP8bbl96ygFWCmkCU",[803,805],{"title":319,"path":320,"stem":321,"description":804,"icon":322,"children":-1},"Wide events and structured logging in AWS Lambda functions, including SQS consumers and event-driven handlers.",{"title":332,"path":333,"stem":334,"description":806,"icon":335,"children":-1},"Capture browser events with structured logging. Same API as the server, with automatic console styling, user identity context, and optional server transport.",1791444523064]