[{"data":1,"prerenderedAt":2034},["ShallowReactive",2],{"navigation_docs":3,"-extend-plugins":534,"-extend-plugins-surround":2029},[4,30,80,128,308,440,499],{"title":5,"path":6,"stem":7,"children":8,"page":29},"Start","\u002Fstart","1.start",[9,14,19,24],{"title":10,"path":11,"stem":12,"icon":13},"Introduction","\u002Fstart\u002Fintroduction","1.start\u002F1.introduction","i-lucide-info",{"title":15,"path":16,"stem":17,"icon":18},"Why start with evlog","\u002Fstart\u002Fwhy-evlog","1.start\u002F2.why-evlog","i-lucide-rocket",{"title":20,"path":21,"stem":22,"icon":23},"Installation","\u002Fstart\u002Finstallation","1.start\u002F3.installation","i-lucide-download",{"title":25,"path":26,"stem":27,"icon":28},"Quick Start","\u002Fstart\u002Fquick-start","1.start\u002F4.quick-start","i-lucide-zap",false,{"title":31,"path":32,"stem":33,"children":34,"page":29},"Learn","\u002Flearn","2.learn",[35,40,45,50,55,60,65,70,75],{"title":36,"path":37,"stem":38,"icon":39},"Overview","\u002Flearn\u002Foverview","2.learn\u002F0.overview","i-lucide-list",{"title":41,"path":42,"stem":43,"icon":44},"Simple Logging","\u002Flearn\u002Fsimple-logging","2.learn\u002F1.simple-logging","i-lucide-terminal",{"title":46,"path":47,"stem":48,"icon":49},"Wide Events","\u002Flearn\u002Fwide-events","2.learn\u002F2.wide-events","i-lucide-layers",{"title":51,"path":52,"stem":53,"icon":54},"Structured Errors","\u002Flearn\u002Fstructured-errors","2.learn\u002F3.structured-errors","i-lucide-shield-alert",{"title":56,"path":57,"stem":58,"icon":59},"Lifecycle","\u002Flearn\u002Flifecycle","2.learn\u002F4.lifecycle","i-lucide-arrow-right-left",{"title":61,"path":62,"stem":63,"icon":64},"Sampling","\u002Flearn\u002Fsampling","2.learn\u002F5.sampling","i-lucide-filter",{"title":66,"path":67,"stem":68,"icon":69},"Auto-Redaction","\u002Flearn\u002Fredaction","2.learn\u002F6.redaction","i-lucide-eye-off",{"title":71,"path":72,"stem":73,"icon":74},"Typed Fields","\u002Flearn\u002Ftyped-fields","2.learn\u002F7.typed-fields","i-simple-icons-typescript",{"title":76,"path":77,"stem":78,"icon":79},"Catalogs","\u002Flearn\u002Fcatalogs","2.learn\u002F8.catalogs","i-lucide-book-open",{"title":81,"path":82,"stem":83,"children":84,"page":29},"CLI","\u002Fcli","3.cli",[85,88,93,98,103,108,113,118,123],{"title":36,"path":86,"stem":87,"icon":44},"\u002Fcli\u002Foverview","3.cli\u002F0.overview",{"title":89,"path":90,"stem":91,"icon":92},"init","\u002Fcli\u002Finit","3.cli\u002F1.init","i-lucide-wand-sparkles",{"title":94,"path":95,"stem":96,"icon":97},"map","\u002Fcli\u002Fmap","3.cli\u002F2.map","i-lucide-radar",{"title":99,"path":100,"stem":101,"icon":102},"Rules","\u002Fcli\u002Frules","3.cli\u002F3.rules","i-lucide-list-checks",{"title":104,"path":105,"stem":106,"icon":107},"Scoring","\u002Fcli\u002Fscoring","3.cli\u002F4.scoring","i-lucide-gauge",{"title":109,"path":110,"stem":111,"icon":112},"CI","\u002Fcli\u002Fci","3.cli\u002F5.ci","i-lucide-git-pull-request",{"title":114,"path":115,"stem":116,"icon":117},"doctor","\u002Fcli\u002Fdoctor","3.cli\u002F6.doctor","i-lucide-stethoscope",{"title":119,"path":120,"stem":121,"icon":122},"telemetry","\u002Fcli\u002Ftelemetry","3.cli\u002F7.telemetry","i-lucide-bar-chart-3",{"title":124,"path":125,"stem":126,"icon":127},"agents","\u002Fcli\u002Fagents","3.cli\u002F8.agents","i-lucide-bot",{"title":129,"path":130,"stem":131,"children":132,"page":29},"Integrate","\u002Fintegrate","4.integrate",[133,137,220],{"title":36,"path":134,"stem":135,"icon":136},"\u002Fintegrate\u002Foverview","4.integrate\u002F0.overview","i-lucide-plug",{"title":138,"path":139,"stem":140,"children":141,"page":29},"Adapters","\u002Fintegrate\u002Fadapters","4.integrate\u002Fadapters",[142,145,175,200],{"title":36,"path":143,"stem":144,"icon":39},"\u002Fintegrate\u002Fadapters\u002Foverview","4.integrate\u002Fadapters\u002F01.overview",{"title":146,"path":147,"stem":148,"children":149,"page":29},"Cloud","\u002Fintegrate\u002Fadapters\u002Fcloud","4.integrate\u002Fadapters\u002Fcloud",[150,155,160,165,170],{"title":151,"path":152,"stem":153,"icon":154},"Axiom","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Faxiom","4.integrate\u002Fadapters\u002Fcloud\u002F01.axiom","i-custom-axiom",{"title":156,"path":157,"stem":158,"icon":159},"PostHog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fposthog","4.integrate\u002Fadapters\u002Fcloud\u002F02.posthog","i-simple-icons-posthog",{"title":161,"path":162,"stem":163,"icon":164},"Sentry","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fsentry","4.integrate\u002Fadapters\u002Fcloud\u002F03.sentry","i-simple-icons-sentry",{"title":166,"path":167,"stem":168,"icon":169},"Better Stack","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fbetter-stack","4.integrate\u002Fadapters\u002Fcloud\u002F04.better-stack","i-simple-icons-betterstack",{"title":171,"path":172,"stem":173,"icon":174},"Datadog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fdatadog","4.integrate\u002Fadapters\u002Fcloud\u002F05.datadog","i-simple-icons-datadog",{"title":176,"path":177,"stem":178,"children":179,"page":29},"Cloud or Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fhybrid","4.integrate\u002Fadapters\u002Fhybrid",[180,185,190,195],{"title":181,"path":182,"stem":183,"icon":184},"Grafana Loki","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Floki","4.integrate\u002Fadapters\u002Fhybrid\u002F01.loki","i-simple-icons-grafana",{"title":186,"path":187,"stem":188,"icon":189},"ClickHouse","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fclickhouse","4.integrate\u002Fadapters\u002Fhybrid\u002F02.clickhouse","i-simple-icons-clickhouse",{"title":191,"path":192,"stem":193,"icon":194},"OTLP","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fotlp","4.integrate\u002Fadapters\u002Fhybrid\u002F03.otlp","i-simple-icons-opentelemetry",{"title":196,"path":197,"stem":198,"icon":199},"HyperDX","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fhyperdx","4.integrate\u002Fadapters\u002Fhybrid\u002F04.hyperdx","i-custom-hyperdx",{"title":201,"path":202,"stem":203,"children":204,"page":29},"Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fself-hosted","4.integrate\u002Fadapters\u002Fself-hosted",[205,210,215],{"title":206,"path":207,"stem":208,"icon":209},"File System","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Ffs","4.integrate\u002Fadapters\u002Fself-hosted\u002F01.fs","i-lucide-hard-drive",{"title":211,"path":212,"stem":213,"icon":214},"NuxtHub","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fnuxthub","4.integrate\u002Fadapters\u002Fself-hosted\u002F02.nuxthub","i-simple-icons-nuxt",{"title":216,"path":217,"stem":218,"icon":219},"Memory","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fmemory","4.integrate\u002Fadapters\u002Fself-hosted\u002F03.memory","i-lucide-cpu",{"title":221,"path":222,"stem":223,"children":224,"page":29},"Frameworks","\u002Fintegrate\u002Fframeworks","4.integrate\u002Fframeworks",[225,229,234,239,244,249,254,259,264,269,274,279,284,289,293,298,303],{"title":36,"path":226,"stem":227,"icon":228},"\u002Fintegrate\u002Fframeworks\u002Foverview","4.integrate\u002Fframeworks\u002F00.overview","i-lucide-layout-grid",{"title":230,"path":231,"stem":232,"icon":233},"Nuxt","\u002Fintegrate\u002Fframeworks\u002Fnuxt","4.integrate\u002Fframeworks\u002F01.nuxt","i-simple-icons-nuxtdotjs",{"title":235,"path":236,"stem":237,"icon":238},"Next.js","\u002Fintegrate\u002Fframeworks\u002Fnextjs","4.integrate\u002Fframeworks\u002F02.nextjs","i-simple-icons-nextdotjs",{"title":240,"path":241,"stem":242,"icon":243},"SvelteKit","\u002Fintegrate\u002Fframeworks\u002Fsveltekit","4.integrate\u002Fframeworks\u002F03.sveltekit","i-simple-icons-svelte",{"title":245,"path":246,"stem":247,"icon":248},"Nitro","\u002Fintegrate\u002Fframeworks\u002Fnitro","4.integrate\u002Fframeworks\u002F04.nitro","i-custom-nitro",{"title":250,"path":251,"stem":252,"icon":253},"TanStack Start","\u002Fintegrate\u002Fframeworks\u002Ftanstack-start","4.integrate\u002Fframeworks\u002F05.tanstack-start","i-custom-tanstack",{"title":255,"path":256,"stem":257,"icon":258},"NestJS","\u002Fintegrate\u002Fframeworks\u002Fnestjs","4.integrate\u002Fframeworks\u002F06.nestjs","i-simple-icons-nestjs",{"title":260,"path":261,"stem":262,"icon":263},"Express","\u002Fintegrate\u002Fframeworks\u002Fexpress","4.integrate\u002Fframeworks\u002F07.express","i-simple-icons-express",{"title":265,"path":266,"stem":267,"icon":268},"Hono","\u002Fintegrate\u002Fframeworks\u002Fhono","4.integrate\u002Fframeworks\u002F08.hono","i-simple-icons-hono",{"title":270,"path":271,"stem":272,"icon":273},"Fastify","\u002Fintegrate\u002Fframeworks\u002Ffastify","4.integrate\u002Fframeworks\u002F09.fastify","i-simple-icons-fastify",{"title":275,"path":276,"stem":277,"icon":278},"Elysia","\u002Fintegrate\u002Fframeworks\u002Felysia","4.integrate\u002Fframeworks\u002F10.elysia","i-custom-elysia",{"title":280,"path":281,"stem":282,"icon":283},"React Router","\u002Fintegrate\u002Fframeworks\u002Freact-router","4.integrate\u002Fframeworks\u002F11.react-router","i-custom-reactrouter",{"title":285,"path":286,"stem":287,"icon":288},"Cloudflare Workers","\u002Fintegrate\u002Fframeworks\u002Fcloudflare-workers","4.integrate\u002Fframeworks\u002F12.cloudflare-workers","i-simple-icons-cloudflare",{"title":290,"path":291,"stem":292,"icon":74},"Standalone","\u002Fintegrate\u002Fframeworks\u002Fstandalone","4.integrate\u002Fframeworks\u002F13.standalone",{"title":294,"path":295,"stem":296,"icon":297},"Astro","\u002Fintegrate\u002Fframeworks\u002Fastro","4.integrate\u002Fframeworks\u002F14.astro","i-simple-icons-astro",{"title":299,"path":300,"stem":301,"icon":302},"oRPC","\u002Fintegrate\u002Fframeworks\u002Forpc","4.integrate\u002Fframeworks\u002F15.orpc","i-lucide-network",{"title":304,"path":305,"stem":306,"icon":307},"AWS Lambda","\u002Fintegrate\u002Fframeworks\u002Faws-lambda","4.integrate\u002Fframeworks\u002F16.aws-lambda","i-custom-lambda",{"title":309,"path":310,"stem":311,"children":312,"page":29},"Use Cases","\u002Fuse-cases","5.use-cases",[313,316,321,350,377,409,430,435],{"title":36,"path":314,"stem":315,"icon":102},"\u002Fuse-cases\u002Foverview","5.use-cases\u002F0.overview",{"title":317,"path":318,"stem":319,"icon":320},"Client Logging","\u002Fuse-cases\u002Fclient-logging","5.use-cases\u002F1.client-logging","i-lucide-monitor",{"title":322,"icon":323,"path":324,"stem":325,"children":326,"page":29},"AI SDK","i-simple-icons-vercel","\u002Fuse-cases\u002Fai-sdk","5.use-cases\u002F2.ai-sdk",[327,330,335,340,345],{"title":36,"path":328,"stem":329,"icon":39},"\u002Fuse-cases\u002Fai-sdk\u002Foverview","5.use-cases\u002F2.ai-sdk\u002F01.overview",{"title":331,"path":332,"stem":333,"icon":334},"Usage","\u002Fuse-cases\u002Fai-sdk\u002Fusage","5.use-cases\u002F2.ai-sdk\u002F02.usage","i-lucide-code",{"title":336,"path":337,"stem":338,"icon":339},"Options","\u002Fuse-cases\u002Fai-sdk\u002Foptions","5.use-cases\u002F2.ai-sdk\u002F03.options","i-lucide-sliders",{"title":341,"path":342,"stem":343,"icon":344},"Metadata","\u002Fuse-cases\u002Fai-sdk\u002Fmetadata","5.use-cases\u002F2.ai-sdk\u002F04.metadata","i-lucide-database",{"title":346,"path":347,"stem":348,"icon":349},"Telemetry","\u002Fuse-cases\u002Fai-sdk\u002Ftelemetry","5.use-cases\u002F2.ai-sdk\u002F05.telemetry","i-lucide-activity",{"title":351,"icon":352,"path":353,"stem":354,"children":355,"page":29},"Better Auth","i-simple-icons-betterauth","\u002Fuse-cases\u002Fbetter-auth","5.use-cases\u002F3.better-auth",[356,359,364,369,373],{"title":36,"path":357,"stem":358,"icon":39},"\u002Fuse-cases\u002Fbetter-auth\u002Foverview","5.use-cases\u002F3.better-auth\u002F01.overview",{"title":360,"path":361,"stem":362,"icon":363},"Identify User","\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user","5.use-cases\u002F3.better-auth\u002F02.identify-user","i-lucide-user-check",{"title":365,"path":366,"stem":367,"icon":368},"Middleware","\u002Fuse-cases\u002Fbetter-auth\u002Fmiddleware","5.use-cases\u002F3.better-auth\u002F03.middleware","i-lucide-shield",{"title":370,"path":371,"stem":372,"icon":320},"Client Sync","\u002Fuse-cases\u002Fbetter-auth\u002Fclient-sync","5.use-cases\u002F3.better-auth\u002F04.client-sync",{"title":374,"path":375,"stem":376,"icon":107},"Performance","\u002Fuse-cases\u002Fbetter-auth\u002Fperformance","5.use-cases\u002F3.better-auth\u002F05.performance",{"title":378,"icon":379,"path":380,"stem":381,"children":382,"page":29},"Audit Logs","i-lucide-shield-check","\u002Fuse-cases\u002Faudit","5.use-cases\u002F4.audit",[383,386,391,396,401,405],{"title":36,"path":384,"stem":385,"icon":39},"\u002Fuse-cases\u002Faudit\u002Foverview","5.use-cases\u002F4.audit\u002F01.overview",{"title":387,"path":388,"stem":389,"icon":390},"Schema","\u002Fuse-cases\u002Faudit\u002Fschema","5.use-cases\u002F4.audit\u002F02.schema","i-lucide-file-text",{"title":392,"path":393,"stem":394,"icon":395},"Recording","\u002Fuse-cases\u002Faudit\u002Frecording","5.use-cases\u002F4.audit\u002F03.recording","i-lucide-pen-line",{"title":397,"path":398,"stem":399,"icon":400},"Drains","\u002Fuse-cases\u002Faudit\u002Fpipeline","5.use-cases\u002F4.audit\u002F04.pipeline","i-lucide-link",{"title":402,"path":403,"stem":404,"icon":379},"Compliance","\u002Fuse-cases\u002Faudit\u002Fcompliance","5.use-cases\u002F4.audit\u002F05.compliance",{"title":406,"path":407,"stem":408,"icon":79},"Recipes","\u002Fuse-cases\u002Faudit\u002Frecipes","5.use-cases\u002F4.audit\u002F06.recipes",{"title":346,"icon":107,"path":410,"stem":411,"children":412,"page":29},"\u002Fuse-cases\u002Ftelemetry","5.use-cases\u002F4.telemetry",[413,416,421,426],{"title":36,"path":414,"stem":415,"icon":39},"\u002Fuse-cases\u002Ftelemetry\u002Foverview","5.use-cases\u002F4.telemetry\u002F01.overview",{"title":417,"path":418,"stem":419,"icon":420},"Setup","\u002Fuse-cases\u002Ftelemetry\u002Fsetup","5.use-cases\u002F4.telemetry\u002F02.setup","i-lucide-wrench",{"title":422,"path":423,"stem":424,"icon":425},"Ingest","\u002Fuse-cases\u002Ftelemetry\u002Fingest","5.use-cases\u002F4.telemetry\u002F03.ingest","i-lucide-server",{"title":427,"path":428,"stem":429,"icon":79},"Reference","\u002Fuse-cases\u002Ftelemetry\u002Freference","5.use-cases\u002F4.telemetry\u002F04.reference",{"title":431,"path":432,"stem":433,"icon":434},"Enrichers","\u002Fuse-cases\u002Fenrichers","5.use-cases\u002F5.enrichers","i-lucide-sparkles",{"title":436,"path":437,"stem":438,"icon":439},"eve","\u002Fuse-cases\u002Feve","5.use-cases\u002F5.eve","i-custom-eve",{"title":441,"path":442,"stem":443,"children":444,"page":29},"Extend","\u002Fextend","6.extend",[445,449,454,459,463,468,472,476,480,484,489,494],{"title":36,"path":446,"stem":447,"icon":448},"\u002Fextend\u002Foverview","6.extend\u002F0.overview","i-lucide-blocks",{"title":450,"path":451,"stem":452,"icon":453},"Stream","\u002Fextend\u002Fstream","6.extend\u002F1.stream","i-lucide-radio-tower",{"title":455,"path":456,"stem":457,"icon":458},"Custom framework","\u002Fextend\u002Fcustom-framework","6.extend\u002F10.custom-framework","i-lucide-puzzle",{"title":460,"path":461,"stem":462,"icon":453},"Diagnostics channel","\u002Fextend\u002Fdiagnostics-channel","6.extend\u002F11.diagnostics-channel",{"title":464,"path":465,"stem":466,"icon":467},"FS reader","\u002Fextend\u002Ffs-reader","6.extend\u002F2.fs-reader","i-lucide-folder-search",{"title":406,"path":469,"stem":470,"icon":471},"\u002Fextend\u002Fconsumer-recipes","6.extend\u002F3.consumer-recipes","i-lucide-chef-hat",{"title":473,"path":474,"stem":475,"icon":448},"Plugins","\u002Fextend\u002Fplugins","6.extend\u002F4.plugins",{"title":477,"path":478,"stem":479,"icon":434},"Custom enrichers","\u002Fextend\u002Fcustom-enrichers","6.extend\u002F5.custom-enrichers",{"title":481,"path":482,"stem":483,"icon":64},"Tail sampling","\u002Fextend\u002Ftail-sampling","6.extend\u002F6.tail-sampling",{"title":485,"path":486,"stem":487,"icon":488},"Identity headers","\u002Fextend\u002Fidentity-headers","6.extend\u002F7.identity-headers","i-lucide-fingerprint",{"title":490,"path":491,"stem":492,"icon":493},"Custom drains","\u002Fextend\u002Fcustom-drains","6.extend\u002F8.custom-drains","i-lucide-share-2",{"title":495,"path":496,"stem":497,"icon":498},"Drain pipeline","\u002Fextend\u002Fdrain-pipeline","6.extend\u002F9.drain-pipeline","i-lucide-workflow",{"title":427,"path":500,"stem":501,"children":502,"page":29},"\u002Freference","7.reference",[503,508,511,516,520,525,529],{"title":504,"path":505,"stem":506,"icon":507},"Configuration","\u002Freference\u002Fconfiguration","7.reference\u002F1.configuration","i-lucide-settings",{"title":374,"path":509,"stem":510,"icon":107},"\u002Freference\u002Fperformance","7.reference\u002F2.performance",{"title":512,"path":513,"stem":514,"icon":515},"Vite Plugin","\u002Freference\u002Fvite-plugin","7.reference\u002F3.vite-plugin","i-custom-vite",{"title":517,"path":518,"stem":519,"icon":379},"Best Practices","\u002Freference\u002Fbest-practices","7.reference\u002F4.best-practices",{"title":521,"path":522,"stem":523,"icon":524},"vs Other Loggers","\u002Freference\u002Fvs-other-loggers","7.reference\u002F5.vs-other-loggers","i-lucide-scale",{"title":526,"path":527,"stem":528,"icon":434},"Agent Skills","\u002Freference\u002Fagent-skills","7.reference\u002F6.agent-skills",{"title":530,"path":531,"stem":532,"icon":533},"Cost","\u002Freference\u002Fcost","7.reference\u002F7.cost","i-lucide-receipt",{"id":535,"title":473,"body":536,"description":2017,"extension":2018,"links":2019,"meta":2025,"navigation":2026,"path":474,"seo":2027,"stem":475,"__hash__":2028},"docs\u002F6.extend\u002F4.plugins.md",{"type":537,"value":538,"toc":2009},"minimark",[539,542,555,575,662,667,926,929,1161,1164,1306,1320,1324,1339,1803,1807,1816,1907,1914,1918,1975,1979,2005],[540,541],"lifecycle-flow",{},[543,544,545,549,550,554],"p",{},[546,547,548],"code",{},"definePlugin()"," is the ",[551,552,553],"strong",{},"canonical extension point"," for evlog. Drains and enrichers are special cases of plugins, but a single plugin can opt into multiple hooks at once — the right shape for any non-trivial extension that mixes several concerns (e.g. enrich on every event + side-effect on drain + keep decision on tail sampling, all reading the same shared state).",[543,556,557,558,564,565,570,571,574],{},"When the extension only does one thing, prefer the single-purpose ",[559,560,561],"a",{"href":478},[546,562,563],{},"enricherPlugin()"," \u002F ",[559,566,567],{"href":491},[546,568,569],{},"drainPlugin()"," wrappers. Reach for ",[546,572,573],{},"definePlugin"," when several hooks share state.",[576,577,580,583,654],"prompt",{":actions":578,"description":579,"icon":448},"[\"copy\",\"cursor\",\"claude\"]","Build a multi-hook evlog plugin",[543,581,582],{},"Build an evlog plugin that hooks into more than one lifecycle stage.",[584,585,586,620,626,629,643],"ul",{},[587,588,589,590,592,593,596,597,600,601,600,604,600,607,600,610,600,613,600,616,619],"li",{},"Import ",[546,591,573],{}," from ",[546,594,595],{},"evlog"," and pick the hooks I need (",[546,598,599],{},"onRequestStart",", ",[546,602,603],{},"enrich",[546,605,606],{},"drain",[546,608,609],{},"extendLogger",[546,611,612],{},"keep",[546,614,615],{},"onClientLog",[546,617,618],{},"onRequestFinish",")",[587,621,622,623,625],{},"Keep ",[546,624,603],{}," pure (no I\u002FO, no throwing — use try\u002Fcatch internally)",[587,627,628],{},"For drains, batch and ship to the destination; respect backpressure if the sink is slow",[587,630,631,632,635,636,639,640,619],{},"Register the plugin via the framework config: Next\u002Fstandalone ",[546,633,634],{},"initLogger({ plugins: [myPlugin] })",", Hono\u002FExpress\u002FFastify\u002FElysia middleware option ",[546,637,638],{},"{ plugins: [myPlugin] }",". For Nitro, register the individual hooks directly (",[546,641,642],{},"nitroApp.hooks.hook('evlog:enrich' | 'evlog:drain' | …)",[587,644,645,646,564,648,650,651,653],{},"Prefer single-purpose ",[546,647,563],{},[546,649,569],{}," wrappers for simple extensions; use ",[546,652,573],{}," only when several hooks are needed",[543,655,656,657],{},"Docs: ",[559,658,659],{"href":659,"rel":660},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Fplugins",[661],"nofollow",[663,664,666],"h2",{"id":665},"minimal-example","Minimal example",[668,669,674],"pre",{"className":670,"code":671,"language":672,"meta":673,"style":673},"language-ts shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { definePlugin } from 'evlog'\n\nexport const tenantPlugin = definePlugin({\n  name: 'tenant',\n  onRequestStart({ logger, headers }) {\n    const tenantId = headers?.['x-tenant-id']\n    if (tenantId) logger.set({ tenant: { id: tenantId } })\n  },\n  enrich({ event }) {\n    event.region = process.env.REGION\n  },\n})\n","ts","",[546,675,676,708,715,740,761,786,816,866,872,887,913,918],{"__ignoreMap":673},[677,678,681,685,689,693,696,699,702,705],"span",{"class":679,"line":680},"line",1,[677,682,684],{"class":683},"s7zQu","import",[677,686,688],{"class":687},"sMK4o"," {",[677,690,692],{"class":691},"sTEyZ"," definePlugin",[677,694,695],{"class":687}," }",[677,697,698],{"class":683}," from",[677,700,701],{"class":687}," '",[677,703,595],{"class":704},"sfazB",[677,706,707],{"class":687},"'\n",[677,709,711],{"class":679,"line":710},2,[677,712,714],{"emptyLinePlaceholder":713},true,"\n",[677,716,718,721,725,728,731,734,737],{"class":679,"line":717},3,[677,719,720],{"class":683},"export",[677,722,724],{"class":723},"spNyl"," const",[677,726,727],{"class":691}," tenantPlugin ",[677,729,730],{"class":687},"=",[677,732,692],{"class":733},"s2Zo4",[677,735,736],{"class":691},"(",[677,738,739],{"class":687},"{\n",[677,741,743,747,750,752,755,758],{"class":679,"line":742},4,[677,744,746],{"class":745},"swJcz","  name",[677,748,749],{"class":687},":",[677,751,701],{"class":687},[677,753,754],{"class":704},"tenant",[677,756,757],{"class":687},"'",[677,759,760],{"class":687},",\n",[677,762,764,767,770,774,777,780,783],{"class":679,"line":763},5,[677,765,766],{"class":745},"  onRequestStart",[677,768,769],{"class":687},"({",[677,771,773],{"class":772},"sHdIc"," logger",[677,775,776],{"class":687},",",[677,778,779],{"class":772}," headers",[677,781,782],{"class":687}," })",[677,784,785],{"class":687}," {\n",[677,787,789,792,795,798,800,803,806,808,811,813],{"class":679,"line":788},6,[677,790,791],{"class":723},"    const",[677,793,794],{"class":691}," tenantId",[677,796,797],{"class":687}," =",[677,799,779],{"class":691},[677,801,802],{"class":687},"?.",[677,804,805],{"class":745},"[",[677,807,757],{"class":687},[677,809,810],{"class":704},"x-tenant-id",[677,812,757],{"class":687},[677,814,815],{"class":745},"]\n",[677,817,819,822,825,828,831,834,837,840,842,845,848,850,852,855,857,859,861,863],{"class":679,"line":818},7,[677,820,821],{"class":683},"    if",[677,823,824],{"class":745}," (",[677,826,827],{"class":691},"tenantId",[677,829,830],{"class":745},") ",[677,832,833],{"class":691},"logger",[677,835,836],{"class":687},".",[677,838,839],{"class":733},"set",[677,841,736],{"class":745},[677,843,844],{"class":687},"{",[677,846,847],{"class":745}," tenant",[677,849,749],{"class":687},[677,851,688],{"class":687},[677,853,854],{"class":745}," id",[677,856,749],{"class":687},[677,858,794],{"class":691},[677,860,695],{"class":687},[677,862,695],{"class":687},[677,864,865],{"class":745},")\n",[677,867,869],{"class":679,"line":868},8,[677,870,871],{"class":687},"  },\n",[677,873,875,878,880,883,885],{"class":679,"line":874},9,[677,876,877],{"class":745},"  enrich",[677,879,769],{"class":687},[677,881,882],{"class":772}," event",[677,884,782],{"class":687},[677,886,785],{"class":687},[677,888,890,893,895,898,900,903,905,908,910],{"class":679,"line":889},10,[677,891,892],{"class":691},"    event",[677,894,836],{"class":687},[677,896,897],{"class":691},"region",[677,899,797],{"class":687},[677,901,902],{"class":691}," process",[677,904,836],{"class":687},[677,906,907],{"class":691},"env",[677,909,836],{"class":687},[677,911,912],{"class":691},"REGION\n",[677,914,916],{"class":679,"line":915},11,[677,917,871],{"class":687},[677,919,921,924],{"class":679,"line":920},12,[677,922,923],{"class":687},"}",[677,925,865],{"class":691},[543,927,928],{},"Register the plugin where you bootstrap evlog. The shape depends on your runtime:",[930,931,932,1002,1080],"code-group",{},[668,933,936],{"className":670,"code":934,"filename":935,"language":672,"meta":673,"style":673},"import { initLogger } from 'evlog'\nimport { tenantPlugin } from '.\u002Fplugins\u002Ftenant'\n\ninitLogger({ plugins: [tenantPlugin] })\n","Next.js \u002F standalone",[546,937,938,957,977,981],{"__ignoreMap":673},[677,939,940,942,944,947,949,951,953,955],{"class":679,"line":680},[677,941,684],{"class":683},[677,943,688],{"class":687},[677,945,946],{"class":691}," initLogger",[677,948,695],{"class":687},[677,950,698],{"class":683},[677,952,701],{"class":687},[677,954,595],{"class":704},[677,956,707],{"class":687},[677,958,959,961,963,966,968,970,972,975],{"class":679,"line":710},[677,960,684],{"class":683},[677,962,688],{"class":687},[677,964,965],{"class":691}," tenantPlugin",[677,967,695],{"class":687},[677,969,698],{"class":683},[677,971,701],{"class":687},[677,973,974],{"class":704},".\u002Fplugins\u002Ftenant",[677,976,707],{"class":687},[677,978,979],{"class":679,"line":717},[677,980,714],{"emptyLinePlaceholder":713},[677,982,983,986,988,990,993,995,998,1000],{"class":679,"line":742},[677,984,985],{"class":733},"initLogger",[677,987,736],{"class":691},[677,989,844],{"class":687},[677,991,992],{"class":745}," plugins",[677,994,749],{"class":687},[677,996,997],{"class":691}," [tenantPlugin] ",[677,999,923],{"class":687},[677,1001,865],{"class":691},[668,1003,1006],{"className":670,"code":1004,"filename":1005,"language":672,"meta":673,"style":673},"import { evlogMiddleware } from 'evlog\u002F\u003Cframework>'\nimport { tenantPlugin } from '.\u002Fplugins\u002Ftenant'\n\napp.use(evlogMiddleware({ plugins: [tenantPlugin] }))\n","Hono \u002F Express \u002F Fastify \u002F Elysia",[546,1007,1008,1028,1046,1050],{"__ignoreMap":673},[677,1009,1010,1012,1014,1017,1019,1021,1023,1026],{"class":679,"line":680},[677,1011,684],{"class":683},[677,1013,688],{"class":687},[677,1015,1016],{"class":691}," evlogMiddleware",[677,1018,695],{"class":687},[677,1020,698],{"class":683},[677,1022,701],{"class":687},[677,1024,1025],{"class":704},"evlog\u002F\u003Cframework>",[677,1027,707],{"class":687},[677,1029,1030,1032,1034,1036,1038,1040,1042,1044],{"class":679,"line":710},[677,1031,684],{"class":683},[677,1033,688],{"class":687},[677,1035,965],{"class":691},[677,1037,695],{"class":687},[677,1039,698],{"class":683},[677,1041,701],{"class":687},[677,1043,974],{"class":704},[677,1045,707],{"class":687},[677,1047,1048],{"class":679,"line":717},[677,1049,714],{"emptyLinePlaceholder":713},[677,1051,1052,1055,1057,1060,1062,1065,1067,1069,1071,1073,1075,1077],{"class":679,"line":742},[677,1053,1054],{"class":691},"app",[677,1056,836],{"class":687},[677,1058,1059],{"class":733},"use",[677,1061,736],{"class":691},[677,1063,1064],{"class":733},"evlogMiddleware",[677,1066,736],{"class":691},[677,1068,844],{"class":687},[677,1070,992],{"class":745},[677,1072,749],{"class":687},[677,1074,997],{"class":691},[677,1076,923],{"class":687},[677,1078,1079],{"class":691},"))\n",[668,1081,1083],{"className":670,"code":1082,"filename":245,"language":672,"meta":673,"style":673},"\u002F\u002F Register the hooks you actually use directly:\nnitroApp.hooks.hook('evlog:enrich', tenantPlugin.enrich!)\nnitroApp.hooks.hook('evlog:request:start', tenantPlugin.onRequestStart!)\n",[546,1084,1085,1091,1128],{"__ignoreMap":673},[677,1086,1087],{"class":679,"line":680},[677,1088,1090],{"class":1089},"sHwdD","\u002F\u002F Register the hooks you actually use directly:\n",[677,1092,1093,1096,1098,1101,1103,1106,1108,1110,1113,1115,1117,1119,1121,1123,1126],{"class":679,"line":710},[677,1094,1095],{"class":691},"nitroApp",[677,1097,836],{"class":687},[677,1099,1100],{"class":691},"hooks",[677,1102,836],{"class":687},[677,1104,1105],{"class":733},"hook",[677,1107,736],{"class":691},[677,1109,757],{"class":687},[677,1111,1112],{"class":704},"evlog:enrich",[677,1114,757],{"class":687},[677,1116,776],{"class":687},[677,1118,965],{"class":691},[677,1120,836],{"class":687},[677,1122,603],{"class":691},[677,1124,1125],{"class":687},"!",[677,1127,865],{"class":691},[677,1129,1130,1132,1134,1136,1138,1140,1142,1144,1147,1149,1151,1153,1155,1157,1159],{"class":679,"line":717},[677,1131,1095],{"class":691},[677,1133,836],{"class":687},[677,1135,1100],{"class":691},[677,1137,836],{"class":687},[677,1139,1105],{"class":733},[677,1141,736],{"class":691},[677,1143,757],{"class":687},[677,1145,1146],{"class":704},"evlog:request:start",[677,1148,757],{"class":687},[677,1150,776],{"class":687},[677,1152,965],{"class":691},[677,1154,836],{"class":687},[677,1156,599],{"class":691},[677,1158,1125],{"class":687},[677,1160,865],{"class":691},[663,1162,1163],{"id":1100},"Hooks",[1165,1166,1167,1183],"table",{},[1168,1169,1170],"thead",{},[1171,1172,1173,1177,1180],"tr",{},[1174,1175,1176],"th",{},"Hook",[1174,1178,1179],{},"When",[1174,1181,1182],{},"Use it for",[1184,1185,1186,1203,1218,1231,1251,1264,1277,1290],"tbody",{},[1171,1187,1188,1194,1197],{},[1189,1190,1191],"td",{},[546,1192,1193],{},"setup(ctx)",[1189,1195,1196],{},"Once when registered",[1189,1198,1199,1200,1202],{},"Read ",[546,1201,907],{},", set up shared state",[1171,1204,1205,1210,1213],{},[1189,1206,1207],{},[546,1208,1209],{},"onRequestStart(ctx)",[1189,1211,1212],{},"Each request, before any handler runs",[1189,1214,1215,1216],{},"Pull values from headers into ",[546,1217,833],{},[1171,1219,1220,1225,1228],{},[1189,1221,1222],{},[546,1223,1224],{},"enrich(ctx)",[1189,1226,1227],{},"Every event, before drain",[1189,1229,1230],{},"Add derived fields (geo, deploy id…)",[1171,1232,1233,1238,1241],{},[1189,1234,1235],{},[546,1236,1237],{},"keep(ctx)",[1189,1239,1240],{},"Tail sampling decision",[1189,1242,1243,1244,600,1247,1250],{},"Force-keep based on outcome (",[546,1245,1246],{},"status >= 400",[546,1248,1249],{},"duration > 500",", …)",[1171,1252,1253,1258,1261],{},[1189,1254,1255],{},[546,1256,1257],{},"drain(ctx)",[1189,1259,1260],{},"Every emitted event",[1189,1262,1263],{},"Side-effect: alert, mirror to a queue, etc.",[1171,1265,1266,1271,1274],{},[1189,1267,1268],{},[546,1269,1270],{},"onRequestFinish(ctx)",[1189,1272,1273],{},"After response",[1189,1275,1276],{},"Per-request post-processing",[1171,1278,1279,1284,1287],{},[1189,1280,1281],{},[546,1282,1283],{},"onClientLog(ctx)",[1189,1285,1286],{},"Browser-submitted event hits the ingest endpoint",[1189,1288,1289],{},"Observe \u002F reject client traffic",[1171,1291,1292,1297,1300],{},[1189,1293,1294],{},[546,1295,1296],{},"extendLogger(logger)",[1189,1298,1299],{},"Each request",[1189,1301,1302,1303,619],{},"Add custom methods (e.g. ",[546,1304,1305],{},"logger.audit.refund()",[543,1307,1308,1309,1312,1313,836],{},"Every hook is ",[551,1310,1311],{},"optional",". A plugin can implement any subset. The full type lives in ",[559,1314,1317],{"href":1315,"rel":1316},"https:\u002F\u002Fgithub.com\u002FHugoRCD\u002Fevlog\u002Fblob\u002Fmain\u002Fpackages\u002Fevlog\u002Fsrc\u002Fshared\u002Fplugin.ts",[661],[546,1318,1319],{},"packages\u002Fevlog\u002Fsrc\u002Fshared\u002Fplugin.ts",[663,1321,1323],{"id":1322},"a-multi-hook-example","A multi-hook example",[543,1325,1326,1327,1330,1331,600,1334,1336,1337,749],{},"Plugins shine when several concerns share state. Here, a single ",[546,1328,1329],{},"request-metrics"," plugin tracks per-request timing through ",[546,1332,1333],{},"setup",[546,1335,599],{},", and ",[546,1338,606],{},[668,1340,1342],{"className":670,"code":1341,"language":672,"meta":673,"style":673},"import { definePlugin } from 'evlog\u002Ftoolkit'\n\nexport const requestMetricsPlugin = definePlugin({\n  name: 'request-metrics',\n\n  setup({ env }) {\n    statsd.init({ service: env.service })\n  },\n\n  enrich({ event }) {\n    if (event.durationMs !== undefined) event.tier = event.durationMs > 1000 ? 'slow' : 'fast'\n  },\n\n  drain({ event }) {\n    if (event.durationMs !== undefined) {\n      statsd.timing('http.request', event.durationMs, { path: event.path as string })\n    }\n  },\n\n  onRequestStart({ logger, request }) {\n    logger.set({ trace: { startedAt: Date.now() } })\n  },\n\n  onRequestFinish({ event, durationMs }) {\n    if (event && (event.level === 'error' || durationMs > 5000)) {\n      \u002F\u002F alert \u002F forward \u002F etc.\n    }\n  },\n})\n",[546,1343,1344,1363,1367,1384,1398,1402,1416,1445,1449,1453,1465,1529,1533,1538,1552,1573,1628,1634,1639,1644,1662,1705,1710,1715,1734,1780,1786,1791,1796],{"__ignoreMap":673},[677,1345,1346,1348,1350,1352,1354,1356,1358,1361],{"class":679,"line":680},[677,1347,684],{"class":683},[677,1349,688],{"class":687},[677,1351,692],{"class":691},[677,1353,695],{"class":687},[677,1355,698],{"class":683},[677,1357,701],{"class":687},[677,1359,1360],{"class":704},"evlog\u002Ftoolkit",[677,1362,707],{"class":687},[677,1364,1365],{"class":679,"line":710},[677,1366,714],{"emptyLinePlaceholder":713},[677,1368,1369,1371,1373,1376,1378,1380,1382],{"class":679,"line":717},[677,1370,720],{"class":683},[677,1372,724],{"class":723},[677,1374,1375],{"class":691}," requestMetricsPlugin ",[677,1377,730],{"class":687},[677,1379,692],{"class":733},[677,1381,736],{"class":691},[677,1383,739],{"class":687},[677,1385,1386,1388,1390,1392,1394,1396],{"class":679,"line":742},[677,1387,746],{"class":745},[677,1389,749],{"class":687},[677,1391,701],{"class":687},[677,1393,1329],{"class":704},[677,1395,757],{"class":687},[677,1397,760],{"class":687},[677,1399,1400],{"class":679,"line":763},[677,1401,714],{"emptyLinePlaceholder":713},[677,1403,1404,1407,1409,1412,1414],{"class":679,"line":788},[677,1405,1406],{"class":745},"  setup",[677,1408,769],{"class":687},[677,1410,1411],{"class":772}," env",[677,1413,782],{"class":687},[677,1415,785],{"class":687},[677,1417,1418,1421,1423,1425,1427,1429,1432,1434,1436,1438,1441,1443],{"class":679,"line":818},[677,1419,1420],{"class":691},"    statsd",[677,1422,836],{"class":687},[677,1424,89],{"class":733},[677,1426,736],{"class":745},[677,1428,844],{"class":687},[677,1430,1431],{"class":745}," service",[677,1433,749],{"class":687},[677,1435,1411],{"class":691},[677,1437,836],{"class":687},[677,1439,1440],{"class":691},"service",[677,1442,695],{"class":687},[677,1444,865],{"class":745},[677,1446,1447],{"class":679,"line":868},[677,1448,871],{"class":687},[677,1450,1451],{"class":679,"line":874},[677,1452,714],{"emptyLinePlaceholder":713},[677,1454,1455,1457,1459,1461,1463],{"class":679,"line":889},[677,1456,877],{"class":745},[677,1458,769],{"class":687},[677,1460,882],{"class":772},[677,1462,782],{"class":687},[677,1464,785],{"class":687},[677,1466,1467,1469,1471,1474,1476,1479,1482,1485,1487,1489,1491,1494,1496,1498,1500,1502,1505,1509,1512,1514,1517,1519,1522,1524,1527],{"class":679,"line":915},[677,1468,821],{"class":683},[677,1470,824],{"class":745},[677,1472,1473],{"class":691},"event",[677,1475,836],{"class":687},[677,1477,1478],{"class":691},"durationMs",[677,1480,1481],{"class":687}," !==",[677,1483,1484],{"class":687}," undefined",[677,1486,830],{"class":745},[677,1488,1473],{"class":691},[677,1490,836],{"class":687},[677,1492,1493],{"class":691},"tier",[677,1495,797],{"class":687},[677,1497,882],{"class":691},[677,1499,836],{"class":687},[677,1501,1478],{"class":691},[677,1503,1504],{"class":687}," >",[677,1506,1508],{"class":1507},"sbssI"," 1000",[677,1510,1511],{"class":687}," ?",[677,1513,701],{"class":687},[677,1515,1516],{"class":704},"slow",[677,1518,757],{"class":687},[677,1520,1521],{"class":687}," :",[677,1523,701],{"class":687},[677,1525,1526],{"class":704},"fast",[677,1528,707],{"class":687},[677,1530,1531],{"class":679,"line":920},[677,1532,871],{"class":687},[677,1534,1536],{"class":679,"line":1535},13,[677,1537,714],{"emptyLinePlaceholder":713},[677,1539,1541,1544,1546,1548,1550],{"class":679,"line":1540},14,[677,1542,1543],{"class":745},"  drain",[677,1545,769],{"class":687},[677,1547,882],{"class":772},[677,1549,782],{"class":687},[677,1551,785],{"class":687},[677,1553,1555,1557,1559,1561,1563,1565,1567,1569,1571],{"class":679,"line":1554},15,[677,1556,821],{"class":683},[677,1558,824],{"class":745},[677,1560,1473],{"class":691},[677,1562,836],{"class":687},[677,1564,1478],{"class":691},[677,1566,1481],{"class":687},[677,1568,1484],{"class":687},[677,1570,830],{"class":745},[677,1572,739],{"class":687},[677,1574,1576,1579,1581,1584,1586,1588,1591,1593,1595,1597,1599,1601,1603,1605,1608,1610,1612,1614,1617,1620,1624,1626],{"class":679,"line":1575},16,[677,1577,1578],{"class":691},"      statsd",[677,1580,836],{"class":687},[677,1582,1583],{"class":733},"timing",[677,1585,736],{"class":745},[677,1587,757],{"class":687},[677,1589,1590],{"class":704},"http.request",[677,1592,757],{"class":687},[677,1594,776],{"class":687},[677,1596,882],{"class":691},[677,1598,836],{"class":687},[677,1600,1478],{"class":691},[677,1602,776],{"class":687},[677,1604,688],{"class":687},[677,1606,1607],{"class":745}," path",[677,1609,749],{"class":687},[677,1611,882],{"class":691},[677,1613,836],{"class":687},[677,1615,1616],{"class":691},"path",[677,1618,1619],{"class":683}," as",[677,1621,1623],{"class":1622},"sBMFI"," string",[677,1625,695],{"class":687},[677,1627,865],{"class":745},[677,1629,1631],{"class":679,"line":1630},17,[677,1632,1633],{"class":687},"    }\n",[677,1635,1637],{"class":679,"line":1636},18,[677,1638,871],{"class":687},[677,1640,1642],{"class":679,"line":1641},19,[677,1643,714],{"emptyLinePlaceholder":713},[677,1645,1647,1649,1651,1653,1655,1658,1660],{"class":679,"line":1646},20,[677,1648,766],{"class":745},[677,1650,769],{"class":687},[677,1652,773],{"class":772},[677,1654,776],{"class":687},[677,1656,1657],{"class":772}," request",[677,1659,782],{"class":687},[677,1661,785],{"class":687},[677,1663,1665,1668,1670,1672,1674,1676,1679,1681,1683,1686,1688,1691,1693,1696,1699,1701,1703],{"class":679,"line":1664},21,[677,1666,1667],{"class":691},"    logger",[677,1669,836],{"class":687},[677,1671,839],{"class":733},[677,1673,736],{"class":745},[677,1675,844],{"class":687},[677,1677,1678],{"class":745}," trace",[677,1680,749],{"class":687},[677,1682,688],{"class":687},[677,1684,1685],{"class":745}," startedAt",[677,1687,749],{"class":687},[677,1689,1690],{"class":691}," Date",[677,1692,836],{"class":687},[677,1694,1695],{"class":733},"now",[677,1697,1698],{"class":745},"() ",[677,1700,923],{"class":687},[677,1702,695],{"class":687},[677,1704,865],{"class":745},[677,1706,1708],{"class":679,"line":1707},22,[677,1709,871],{"class":687},[677,1711,1713],{"class":679,"line":1712},23,[677,1714,714],{"emptyLinePlaceholder":713},[677,1716,1718,1721,1723,1725,1727,1730,1732],{"class":679,"line":1717},24,[677,1719,1720],{"class":745},"  onRequestFinish",[677,1722,769],{"class":687},[677,1724,882],{"class":772},[677,1726,776],{"class":687},[677,1728,1729],{"class":772}," durationMs",[677,1731,782],{"class":687},[677,1733,785],{"class":687},[677,1735,1737,1739,1741,1743,1746,1748,1750,1752,1755,1758,1760,1763,1765,1768,1770,1772,1775,1778],{"class":679,"line":1736},25,[677,1738,821],{"class":683},[677,1740,824],{"class":745},[677,1742,1473],{"class":691},[677,1744,1745],{"class":687}," &&",[677,1747,824],{"class":745},[677,1749,1473],{"class":691},[677,1751,836],{"class":687},[677,1753,1754],{"class":691},"level",[677,1756,1757],{"class":687}," ===",[677,1759,701],{"class":687},[677,1761,1762],{"class":704},"error",[677,1764,757],{"class":687},[677,1766,1767],{"class":687}," ||",[677,1769,1729],{"class":691},[677,1771,1504],{"class":687},[677,1773,1774],{"class":1507}," 5000",[677,1776,1777],{"class":745},")) ",[677,1779,739],{"class":687},[677,1781,1783],{"class":679,"line":1782},26,[677,1784,1785],{"class":1089},"      \u002F\u002F alert \u002F forward \u002F etc.\n",[677,1787,1789],{"class":679,"line":1788},27,[677,1790,1633],{"class":687},[677,1792,1794],{"class":679,"line":1793},28,[677,1795,871],{"class":687},[677,1797,1799,1801],{"class":679,"line":1798},29,[677,1800,923],{"class":687},[677,1802,865],{"class":691},[663,1804,1806],{"id":1805},"sugar-plugins","Sugar plugins",[543,1808,1809,1810,1812,1813,1815],{},"For single-hook extensions, the toolkit offers ",[546,1811,569],{}," and ",[546,1814,563],{}," wrappers:",[668,1817,1821],{"className":1818,"code":1819,"language":1820,"meta":673,"style":673},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { drainPlugin, enricherPlugin } from 'evlog\u002Ftoolkit'\n\nconst drainOnly = drainPlugin('axiom', createAxiomDrain())\nconst enricherOnly = enricherPlugin('user-agent', createUserAgentEnricher())\n","typescript",[546,1822,1823,1847,1851,1880],{"__ignoreMap":673},[677,1824,1825,1827,1829,1832,1834,1837,1839,1841,1843,1845],{"class":679,"line":680},[677,1826,684],{"class":683},[677,1828,688],{"class":687},[677,1830,1831],{"class":691}," drainPlugin",[677,1833,776],{"class":687},[677,1835,1836],{"class":691}," enricherPlugin",[677,1838,695],{"class":687},[677,1840,698],{"class":683},[677,1842,701],{"class":687},[677,1844,1360],{"class":704},[677,1846,707],{"class":687},[677,1848,1849],{"class":679,"line":710},[677,1850,714],{"emptyLinePlaceholder":713},[677,1852,1853,1856,1859,1861,1863,1865,1867,1870,1872,1874,1877],{"class":679,"line":717},[677,1854,1855],{"class":723},"const",[677,1857,1858],{"class":691}," drainOnly ",[677,1860,730],{"class":687},[677,1862,1831],{"class":733},[677,1864,736],{"class":691},[677,1866,757],{"class":687},[677,1868,1869],{"class":704},"axiom",[677,1871,757],{"class":687},[677,1873,776],{"class":687},[677,1875,1876],{"class":733}," createAxiomDrain",[677,1878,1879],{"class":691},"())\n",[677,1881,1882,1884,1887,1889,1891,1893,1895,1898,1900,1902,1905],{"class":679,"line":742},[677,1883,1855],{"class":723},[677,1885,1886],{"class":691}," enricherOnly ",[677,1888,730],{"class":687},[677,1890,1836],{"class":733},[677,1892,736],{"class":691},[677,1894,757],{"class":687},[677,1896,1897],{"class":704},"user-agent",[677,1899,757],{"class":687},[677,1901,776],{"class":687},[677,1903,1904],{"class":733}," createUserAgentEnricher",[677,1906,1879],{"class":691},[543,1908,1909,1910,1913],{},"These are equivalent to a ",[546,1911,1912],{},"definePlugin({ name, drain | enrich })"," shape but read more clearly when intent is obvious.",[663,1915,1917],{"id":1916},"common-pitfalls","Common pitfalls",[584,1919,1920,1929,1940,1963],{},[587,1921,1922,1925,1926,1928],{},[551,1923,1924],{},"Don't throw from a hook."," The plugin runner catches and logs errors with the plugin name, but a thrown error from ",[546,1927,603],{}," won't propagate the event downstream. Keep hooks defensive.",[587,1930,1931,1936,1937,1939],{},[551,1932,1933,1935],{},[546,1934,606],{}," runs for every event"," — not just per-request. If you only care about per-request lifecycle, use ",[546,1938,618],{}," instead.",[587,1941,1942,1947,1948,1951,1952,1955,1956,1959,1960,836],{},[551,1943,1944,1946],{},[546,1945,609],{}," mutates the logger object"," — augment ",[546,1949,1950],{},"RequestLogger"," in a ",[546,1953,1954],{},".d.ts"," so ",[546,1957,1958],{},"useLogger(event)"," exposes the new methods to TypeScript. See ",[559,1961,1962],{"href":72},"typed fields",[587,1964,1965,1971,1972,1974],{},[551,1966,1967,1968],{},"Plugins are de-duplicated by ",[546,1969,1970],{},"name",". Re-registering with the same ",[546,1973,1970],{}," replaces the previous version (last registration wins).",[663,1976,1978],{"id":1977},"next-steps","Next steps",[584,1980,1981,1987,1993,1999],{},[587,1982,1983,1986],{},[559,1984,1985],{"href":478},"Custom Enrichers"," — single-hook enrichment",[587,1988,1989,1992],{},[559,1990,1991],{"href":491},"Custom Drains"," — single-destination output",[587,1994,1995,1998],{},[559,1996,1997],{"href":482},"Tail Sampling"," — outcome-aware keep decisions",[587,2000,2001,2004],{},[559,2002,2003],{"href":486},"Identity Headers"," — tag every drain request",[2006,2007,2008],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}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);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}",{"title":673,"searchDepth":710,"depth":710,"links":2010},[2011,2012,2013,2014,2015,2016],{"id":665,"depth":710,"text":666},{"id":1100,"depth":710,"text":1163},{"id":1322,"depth":710,"text":1323},{"id":1805,"depth":710,"text":1806},{"id":1916,"depth":710,"text":1917},{"id":1977,"depth":710,"text":1978},"definePlugin is the canonical extension point for evlog — opt into any subset of setup, onRequestStart, enrich, keep, drain, onRequestFinish, onClientLog, extendLogger from a single cohesive object.","md",[2020,2023,2024],{"label":1985,"icon":434,"to":478,"color":2021,"variant":2022},"neutral","subtle",{"label":1991,"icon":493,"to":491,"color":2021,"variant":2022},{"label":1997,"icon":64,"to":482,"color":2021,"variant":2022},{},{"title":473,"icon":448},{"title":473,"description":2017},"CaGzOsOYCAFDV3rwTWeINIdy8tDGfHNZgdpS6x8zb5g",[2030,2032],{"title":406,"path":469,"stem":470,"description":2031,"icon":471,"children":-1},"Concrete copy-paste recipes — build your own minimal devtool, pipe to curl + jq, replay history then go live, and aggregate on the consumer side.",{"title":477,"path":478,"stem":479,"description":2033,"icon":434,"children":-1},"Write custom enrichers to add derived context to your wide events. Add deployment metadata, tenant IDs, feature flags, geo, or any computed data — the toolkit handles error isolation, undefined skipping, and the merge step.",1786743655655]