[{"data":1,"prerenderedAt":2480},["ShallowReactive",2],{"navigation_docs":3,"-use-cases-ai-sdk-metadata":612,"-use-cases-ai-sdk-metadata-surround":2475},[4,35,85,138,318,453,489,548,587],{"title":5,"path":6,"stem":7,"children":8,"page":34},"Start","\u002Fstart","1.start",[9,14,19,24,29],{"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",{"title":30,"path":31,"stem":32,"icon":33},"Choose your logger","\u002Fstart\u002Ftypescript-logging-library","1.start\u002F5.typescript-logging-library","i-lucide-file-code",false,{"title":36,"path":37,"stem":38,"children":39,"page":34},"Learn","\u002Flearn","2.learn",[40,45,50,55,60,65,70,75,80],{"title":41,"path":42,"stem":43,"icon":44},"Overview","\u002Flearn\u002Foverview","2.learn\u002F0.overview","i-lucide-list",{"title":46,"path":47,"stem":48,"icon":49},"Simple Logging","\u002Flearn\u002Fsimple-logging","2.learn\u002F1.simple-logging","i-lucide-terminal",{"title":51,"path":52,"stem":53,"icon":54},"Wide Events","\u002Flearn\u002Fwide-events","2.learn\u002F2.wide-events","i-lucide-layers",{"title":56,"path":57,"stem":58,"icon":59},"Structured Errors","\u002Flearn\u002Fstructured-errors","2.learn\u002F3.structured-errors","i-lucide-shield-alert",{"title":61,"path":62,"stem":63,"icon":64},"Lifecycle","\u002Flearn\u002Flifecycle","2.learn\u002F4.lifecycle","i-lucide-arrow-right-left",{"title":66,"path":67,"stem":68,"icon":69},"Sampling","\u002Flearn\u002Fsampling","2.learn\u002F5.sampling","i-lucide-filter",{"title":71,"path":72,"stem":73,"icon":74},"Auto-Redaction","\u002Flearn\u002Fredaction","2.learn\u002F6.redaction","i-lucide-eye-off",{"title":76,"path":77,"stem":78,"icon":79},"Typed Fields","\u002Flearn\u002Ftyped-fields","2.learn\u002F7.typed-fields","i-simple-icons-typescript",{"title":81,"path":82,"stem":83,"icon":84},"Catalogs","\u002Flearn\u002Fcatalogs","2.learn\u002F8.catalogs","i-lucide-book-open",{"title":86,"path":87,"stem":88,"children":89,"page":34},"CLI","\u002Fcli","3.cli",[90,93,98,103,108,113,118,123,128,133],{"title":41,"path":91,"stem":92,"icon":49},"\u002Fcli\u002Foverview","3.cli\u002F0.overview",{"title":94,"path":95,"stem":96,"icon":97},"init","\u002Fcli\u002Finit","3.cli\u002F1.init","i-lucide-wand-sparkles",{"title":99,"path":100,"stem":101,"icon":102},"map","\u002Fcli\u002Fmap","3.cli\u002F2.map","i-lucide-radar",{"title":104,"path":105,"stem":106,"icon":107},"Rules","\u002Fcli\u002Frules","3.cli\u002F3.rules","i-lucide-list-checks",{"title":109,"path":110,"stem":111,"icon":112},"Scoring","\u002Fcli\u002Fscoring","3.cli\u002F4.scoring","i-lucide-gauge",{"title":114,"path":115,"stem":116,"icon":117},"CI","\u002Fcli\u002Fci","3.cli\u002F5.ci","i-lucide-git-pull-request",{"title":119,"path":120,"stem":121,"icon":122},"doctor","\u002Fcli\u002Fdoctor","3.cli\u002F6.doctor","i-lucide-stethoscope",{"title":124,"path":125,"stem":126,"icon":127},"telemetry","\u002Fcli\u002Ftelemetry","3.cli\u002F7.telemetry","i-lucide-bar-chart-3",{"title":129,"path":130,"stem":131,"icon":132},"agents","\u002Fcli\u002Fagents","3.cli\u002F8.agents","i-lucide-bot",{"title":134,"path":135,"stem":136,"icon":137},"Observability Score","\u002Fcli\u002Fobservability-score","3.cli\u002F9.observability-score","i-lucide-activity",{"title":139,"path":140,"stem":141,"children":142,"page":34},"Integrate","\u002Fintegrate","4.integrate",[143,147,230],{"title":41,"path":144,"stem":145,"icon":146},"\u002Fintegrate\u002Foverview","4.integrate\u002F0.overview","i-lucide-plug",{"title":148,"path":149,"stem":150,"children":151,"page":34},"Adapters","\u002Fintegrate\u002Fadapters","4.integrate\u002Fadapters",[152,155,185,210],{"title":41,"path":153,"stem":154,"icon":44},"\u002Fintegrate\u002Fadapters\u002Foverview","4.integrate\u002Fadapters\u002F01.overview",{"title":156,"path":157,"stem":158,"children":159,"page":34},"Cloud","\u002Fintegrate\u002Fadapters\u002Fcloud","4.integrate\u002Fadapters\u002Fcloud",[160,165,170,175,180],{"title":161,"path":162,"stem":163,"icon":164},"Axiom","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Faxiom","4.integrate\u002Fadapters\u002Fcloud\u002F01.axiom","i-custom-axiom",{"title":166,"path":167,"stem":168,"icon":169},"PostHog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fposthog","4.integrate\u002Fadapters\u002Fcloud\u002F02.posthog","i-simple-icons-posthog",{"title":171,"path":172,"stem":173,"icon":174},"Sentry","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fsentry","4.integrate\u002Fadapters\u002Fcloud\u002F03.sentry","i-simple-icons-sentry",{"title":176,"path":177,"stem":178,"icon":179},"Better Stack","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fbetter-stack","4.integrate\u002Fadapters\u002Fcloud\u002F04.better-stack","i-simple-icons-betterstack",{"title":181,"path":182,"stem":183,"icon":184},"Datadog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fdatadog","4.integrate\u002Fadapters\u002Fcloud\u002F05.datadog","i-simple-icons-datadog",{"title":186,"path":187,"stem":188,"children":189,"page":34},"Cloud or Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fhybrid","4.integrate\u002Fadapters\u002Fhybrid",[190,195,200,205],{"title":191,"path":192,"stem":193,"icon":194},"Grafana Loki","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Floki","4.integrate\u002Fadapters\u002Fhybrid\u002F01.loki","i-simple-icons-grafana",{"title":196,"path":197,"stem":198,"icon":199},"ClickHouse","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fclickhouse","4.integrate\u002Fadapters\u002Fhybrid\u002F02.clickhouse","i-simple-icons-clickhouse",{"title":201,"path":202,"stem":203,"icon":204},"OTLP","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fotlp","4.integrate\u002Fadapters\u002Fhybrid\u002F03.otlp","i-simple-icons-opentelemetry",{"title":206,"path":207,"stem":208,"icon":209},"HyperDX","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fhyperdx","4.integrate\u002Fadapters\u002Fhybrid\u002F04.hyperdx","i-custom-hyperdx",{"title":211,"path":212,"stem":213,"children":214,"page":34},"Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fself-hosted","4.integrate\u002Fadapters\u002Fself-hosted",[215,220,225],{"title":216,"path":217,"stem":218,"icon":219},"File System","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Ffs","4.integrate\u002Fadapters\u002Fself-hosted\u002F01.fs","i-lucide-hard-drive",{"title":221,"path":222,"stem":223,"icon":224},"NuxtHub","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fnuxthub","4.integrate\u002Fadapters\u002Fself-hosted\u002F02.nuxthub","i-simple-icons-nuxt",{"title":226,"path":227,"stem":228,"icon":229},"Memory","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fmemory","4.integrate\u002Fadapters\u002Fself-hosted\u002F03.memory","i-lucide-cpu",{"title":231,"path":232,"stem":233,"children":234,"page":34},"Frameworks","\u002Fintegrate\u002Fframeworks","4.integrate\u002Fframeworks",[235,239,244,249,254,259,264,269,274,279,284,289,294,299,303,308,313],{"title":41,"path":236,"stem":237,"icon":238},"\u002Fintegrate\u002Fframeworks\u002Foverview","4.integrate\u002Fframeworks\u002F00.overview","i-lucide-layout-grid",{"title":240,"path":241,"stem":242,"icon":243},"Nuxt","\u002Fintegrate\u002Fframeworks\u002Fnuxt","4.integrate\u002Fframeworks\u002F01.nuxt","i-simple-icons-nuxtdotjs",{"title":245,"path":246,"stem":247,"icon":248},"Next.js","\u002Fintegrate\u002Fframeworks\u002Fnextjs","4.integrate\u002Fframeworks\u002F02.nextjs","i-simple-icons-nextdotjs",{"title":250,"path":251,"stem":252,"icon":253},"SvelteKit","\u002Fintegrate\u002Fframeworks\u002Fsveltekit","4.integrate\u002Fframeworks\u002F03.sveltekit","i-simple-icons-svelte",{"title":255,"path":256,"stem":257,"icon":258},"Nitro","\u002Fintegrate\u002Fframeworks\u002Fnitro","4.integrate\u002Fframeworks\u002F04.nitro","i-custom-nitro",{"title":260,"path":261,"stem":262,"icon":263},"TanStack Start","\u002Fintegrate\u002Fframeworks\u002Ftanstack-start","4.integrate\u002Fframeworks\u002F05.tanstack-start","i-custom-tanstack",{"title":265,"path":266,"stem":267,"icon":268},"NestJS","\u002Fintegrate\u002Fframeworks\u002Fnestjs","4.integrate\u002Fframeworks\u002F06.nestjs","i-simple-icons-nestjs",{"title":270,"path":271,"stem":272,"icon":273},"Express","\u002Fintegrate\u002Fframeworks\u002Fexpress","4.integrate\u002Fframeworks\u002F07.express","i-simple-icons-express",{"title":275,"path":276,"stem":277,"icon":278},"Hono","\u002Fintegrate\u002Fframeworks\u002Fhono","4.integrate\u002Fframeworks\u002F08.hono","i-simple-icons-hono",{"title":280,"path":281,"stem":282,"icon":283},"Fastify","\u002Fintegrate\u002Fframeworks\u002Ffastify","4.integrate\u002Fframeworks\u002F09.fastify","i-simple-icons-fastify",{"title":285,"path":286,"stem":287,"icon":288},"Elysia","\u002Fintegrate\u002Fframeworks\u002Felysia","4.integrate\u002Fframeworks\u002F10.elysia","i-custom-elysia",{"title":290,"path":291,"stem":292,"icon":293},"React Router","\u002Fintegrate\u002Fframeworks\u002Freact-router","4.integrate\u002Fframeworks\u002F11.react-router","i-custom-reactrouter",{"title":295,"path":296,"stem":297,"icon":298},"Cloudflare Workers","\u002Fintegrate\u002Fframeworks\u002Fcloudflare-workers","4.integrate\u002Fframeworks\u002F12.cloudflare-workers","i-simple-icons-cloudflare",{"title":300,"path":301,"stem":302,"icon":79},"Standalone","\u002Fintegrate\u002Fframeworks\u002Fstandalone","4.integrate\u002Fframeworks\u002F13.standalone",{"title":304,"path":305,"stem":306,"icon":307},"Astro","\u002Fintegrate\u002Fframeworks\u002Fastro","4.integrate\u002Fframeworks\u002F14.astro","i-simple-icons-astro",{"title":309,"path":310,"stem":311,"icon":312},"oRPC","\u002Fintegrate\u002Fframeworks\u002Forpc","4.integrate\u002Fframeworks\u002F15.orpc","i-lucide-network",{"title":314,"path":315,"stem":316,"icon":317},"AWS Lambda","\u002Fintegrate\u002Fframeworks\u002Faws-lambda","4.integrate\u002Fframeworks\u002F16.aws-lambda","i-custom-lambda",{"title":319,"path":320,"stem":321,"children":322,"page":34},"Use Cases","\u002Fuse-cases","5.use-cases",[323,326,331,359,386,418,439,444,449],{"title":41,"path":324,"stem":325,"icon":107},"\u002Fuse-cases\u002Foverview","5.use-cases\u002F0.overview",{"title":327,"path":328,"stem":329,"icon":330},"Client Logging","\u002Fuse-cases\u002Fclient-logging","5.use-cases\u002F1.client-logging","i-lucide-monitor",{"title":332,"icon":333,"path":334,"stem":335,"children":336,"page":34},"AI SDK","i-simple-icons-vercel","\u002Fuse-cases\u002Fai-sdk","5.use-cases\u002F2.ai-sdk",[337,340,345,350,355],{"title":41,"path":338,"stem":339,"icon":44},"\u002Fuse-cases\u002Fai-sdk\u002Foverview","5.use-cases\u002F2.ai-sdk\u002F01.overview",{"title":341,"path":342,"stem":343,"icon":344},"Usage","\u002Fuse-cases\u002Fai-sdk\u002Fusage","5.use-cases\u002F2.ai-sdk\u002F02.usage","i-lucide-code",{"title":346,"path":347,"stem":348,"icon":349},"Options","\u002Fuse-cases\u002Fai-sdk\u002Foptions","5.use-cases\u002F2.ai-sdk\u002F03.options","i-lucide-sliders",{"title":351,"path":352,"stem":353,"icon":354},"Metadata","\u002Fuse-cases\u002Fai-sdk\u002Fmetadata","5.use-cases\u002F2.ai-sdk\u002F04.metadata","i-lucide-database",{"title":356,"path":357,"stem":358,"icon":137},"Telemetry","\u002Fuse-cases\u002Fai-sdk\u002Ftelemetry","5.use-cases\u002F2.ai-sdk\u002F05.telemetry",{"title":360,"icon":361,"path":362,"stem":363,"children":364,"page":34},"Better Auth","i-simple-icons-betterauth","\u002Fuse-cases\u002Fbetter-auth","5.use-cases\u002F3.better-auth",[365,368,373,378,382],{"title":41,"path":366,"stem":367,"icon":44},"\u002Fuse-cases\u002Fbetter-auth\u002Foverview","5.use-cases\u002F3.better-auth\u002F01.overview",{"title":369,"path":370,"stem":371,"icon":372},"Identify User","\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user","5.use-cases\u002F3.better-auth\u002F02.identify-user","i-lucide-user-check",{"title":374,"path":375,"stem":376,"icon":377},"Middleware","\u002Fuse-cases\u002Fbetter-auth\u002Fmiddleware","5.use-cases\u002F3.better-auth\u002F03.middleware","i-lucide-shield",{"title":379,"path":380,"stem":381,"icon":330},"Client Sync","\u002Fuse-cases\u002Fbetter-auth\u002Fclient-sync","5.use-cases\u002F3.better-auth\u002F04.client-sync",{"title":383,"path":384,"stem":385,"icon":112},"Performance","\u002Fuse-cases\u002Fbetter-auth\u002Fperformance","5.use-cases\u002F3.better-auth\u002F05.performance",{"title":387,"icon":388,"path":389,"stem":390,"children":391,"page":34},"Audit Logs","i-lucide-shield-check","\u002Fuse-cases\u002Faudit","5.use-cases\u002F4.audit",[392,395,400,405,410,414],{"title":41,"path":393,"stem":394,"icon":44},"\u002Fuse-cases\u002Faudit\u002Foverview","5.use-cases\u002F4.audit\u002F01.overview",{"title":396,"path":397,"stem":398,"icon":399},"Schema","\u002Fuse-cases\u002Faudit\u002Fschema","5.use-cases\u002F4.audit\u002F02.schema","i-lucide-file-text",{"title":401,"path":402,"stem":403,"icon":404},"Recording","\u002Fuse-cases\u002Faudit\u002Frecording","5.use-cases\u002F4.audit\u002F03.recording","i-lucide-pen-line",{"title":406,"path":407,"stem":408,"icon":409},"Drains","\u002Fuse-cases\u002Faudit\u002Fpipeline","5.use-cases\u002F4.audit\u002F04.pipeline","i-lucide-link",{"title":411,"path":412,"stem":413,"icon":388},"Compliance","\u002Fuse-cases\u002Faudit\u002Fcompliance","5.use-cases\u002F4.audit\u002F05.compliance",{"title":415,"path":416,"stem":417,"icon":84},"Recipes","\u002Fuse-cases\u002Faudit\u002Frecipes","5.use-cases\u002F4.audit\u002F06.recipes",{"title":356,"icon":112,"path":419,"stem":420,"children":421,"page":34},"\u002Fuse-cases\u002Ftelemetry","5.use-cases\u002F4.telemetry",[422,425,430,435],{"title":41,"path":423,"stem":424,"icon":44},"\u002Fuse-cases\u002Ftelemetry\u002Foverview","5.use-cases\u002F4.telemetry\u002F01.overview",{"title":426,"path":427,"stem":428,"icon":429},"Setup","\u002Fuse-cases\u002Ftelemetry\u002Fsetup","5.use-cases\u002F4.telemetry\u002F02.setup","i-lucide-wrench",{"title":431,"path":432,"stem":433,"icon":434},"Ingest","\u002Fuse-cases\u002Ftelemetry\u002Fingest","5.use-cases\u002F4.telemetry\u002F03.ingest","i-lucide-server",{"title":436,"path":437,"stem":438,"icon":84},"Reference","\u002Fuse-cases\u002Ftelemetry\u002Freference","5.use-cases\u002F4.telemetry\u002F04.reference",{"title":440,"path":441,"stem":442,"icon":443},"Enrichers","\u002Fuse-cases\u002Fenrichers","5.use-cases\u002F5.enrichers","i-lucide-sparkles",{"title":445,"path":446,"stem":447,"icon":448},"eve","\u002Fuse-cases\u002Feve","5.use-cases\u002F5.eve","i-custom-eve",{"title":450,"path":451,"stem":452,"icon":434},"Node.js request logging","\u002Fuse-cases\u002Fstructured-logging-nodejs","5.use-cases\u002F6.structured-logging-nodejs",{"title":454,"path":455,"stem":456,"children":457,"page":34},"Libraries","\u002Flibraries","6.libraries",[458,462,467,470,474,479,484],{"title":41,"path":459,"stem":460,"icon":461},"\u002Flibraries\u002Foverview","6.libraries\u002F0.overview","i-lucide-package",{"title":463,"path":464,"stem":465,"icon":466},"Emitting Events","\u002Flibraries\u002Femitting","6.libraries\u002F1.emitting","i-lucide-radio",{"title":56,"path":468,"stem":469,"icon":59},"\u002Flibraries\u002Ferrors","6.libraries\u002F2.errors",{"title":471,"path":472,"stem":473,"icon":132},"Errors Agents Can Act On","\u002Flibraries\u002Fagents","6.libraries\u002F3.agents",{"title":475,"path":476,"stem":477,"icon":478},"Exporting the Catalog","\u002Flibraries\u002Fexporting","6.libraries\u002F4.exporting","i-lucide-file-output",{"title":480,"path":481,"stem":482,"icon":483},"Migrating","\u002Flibraries\u002Fmigrating","6.libraries\u002F5.migrating","i-lucide-route",{"title":485,"path":486,"stem":487,"icon":488},"Testing","\u002Flibraries\u002Ftesting","6.libraries\u002F6.testing","i-lucide-flask-conical",{"title":490,"path":491,"stem":492,"children":493,"page":34},"Extend","\u002Fextend","7.extend",[494,498,503,508,512,517,521,525,529,533,538,543],{"title":41,"path":495,"stem":496,"icon":497},"\u002Fextend\u002Foverview","7.extend\u002F0.overview","i-lucide-blocks",{"title":499,"path":500,"stem":501,"icon":502},"Stream","\u002Fextend\u002Fstream","7.extend\u002F1.stream","i-lucide-radio-tower",{"title":504,"path":505,"stem":506,"icon":507},"Custom framework","\u002Fextend\u002Fcustom-framework","7.extend\u002F10.custom-framework","i-lucide-puzzle",{"title":509,"path":510,"stem":511,"icon":502},"Diagnostics channel","\u002Fextend\u002Fdiagnostics-channel","7.extend\u002F11.diagnostics-channel",{"title":513,"path":514,"stem":515,"icon":516},"FS reader","\u002Fextend\u002Ffs-reader","7.extend\u002F2.fs-reader","i-lucide-folder-search",{"title":415,"path":518,"stem":519,"icon":520},"\u002Fextend\u002Fconsumer-recipes","7.extend\u002F3.consumer-recipes","i-lucide-chef-hat",{"title":522,"path":523,"stem":524,"icon":497},"Plugins","\u002Fextend\u002Fplugins","7.extend\u002F4.plugins",{"title":526,"path":527,"stem":528,"icon":443},"Custom enrichers","\u002Fextend\u002Fcustom-enrichers","7.extend\u002F5.custom-enrichers",{"title":530,"path":531,"stem":532,"icon":69},"Tail sampling","\u002Fextend\u002Ftail-sampling","7.extend\u002F6.tail-sampling",{"title":534,"path":535,"stem":536,"icon":537},"Identity headers","\u002Fextend\u002Fidentity-headers","7.extend\u002F7.identity-headers","i-lucide-fingerprint",{"title":539,"path":540,"stem":541,"icon":542},"Custom drains","\u002Fextend\u002Fcustom-drains","7.extend\u002F8.custom-drains","i-lucide-share-2",{"title":544,"path":545,"stem":546,"icon":547},"Drain pipeline","\u002Fextend\u002Fdrain-pipeline","7.extend\u002F9.drain-pipeline","i-lucide-workflow",{"title":436,"path":549,"stem":550,"children":551,"page":34},"\u002Freference","8.reference",[552,556,561,564,569,573,578,582],{"title":41,"path":553,"stem":554,"icon":555},"\u002Freference\u002Foverview","8.reference\u002F0.overview","i-lucide-book-marked",{"title":557,"path":558,"stem":559,"icon":560},"Configuration","\u002Freference\u002Fconfiguration","8.reference\u002F1.configuration","i-lucide-settings",{"title":383,"path":562,"stem":563,"icon":112},"\u002Freference\u002Fperformance","8.reference\u002F2.performance",{"title":565,"path":566,"stem":567,"icon":568},"Vite Plugin","\u002Freference\u002Fvite-plugin","8.reference\u002F3.vite-plugin","i-custom-vite",{"title":570,"path":571,"stem":572,"icon":388},"Best Practices","\u002Freference\u002Fbest-practices","8.reference\u002F4.best-practices",{"title":574,"path":575,"stem":576,"icon":577},"vs Other Loggers","\u002Freference\u002Fvs-other-loggers","8.reference\u002F5.vs-other-loggers","i-lucide-scale",{"title":579,"path":580,"stem":581,"icon":443},"Agent Skills","\u002Freference\u002Fagent-skills","8.reference\u002F6.agent-skills",{"title":583,"path":584,"stem":585,"icon":586},"Cost","\u002Freference\u002Fcost","8.reference\u002F7.cost","i-lucide-receipt",{"title":588,"path":589,"stem":590,"children":591,"page":34},"Compare","\u002Fcompare","9.compare",[592,596,600,604,608],{"title":593,"path":594,"stem":595,"icon":577},"evlog vs Pino","\u002Fcompare\u002Fpino","9.compare\u002F1.pino",{"title":597,"path":598,"stem":599,"icon":204},"evlog vs OpenTelemetry","\u002Fcompare\u002Fopentelemetry","9.compare\u002F2.opentelemetry",{"title":601,"path":602,"stem":603,"icon":577},"evlog vs 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":614,"body":615,"description":2464,"extension":2465,"links":2466,"meta":2471,"navigation":2472,"path":352,"seo":2473,"stem":353,"__hash__":2474},"docs\u002F5.use-cases\u002F2.ai-sdk\u002F04.metadata.md","Access Metadata",{"type":616,"value":617,"toc":2453},"minimark",[618,627,633,641,655,1168,1171,1178,1193,1369,1376,1379,1410,1413,1807,1810,1862,1868,1882,2020,2024,2030,2449],[619,620,621,622,626],"p",{},"The wide event already contains the full ",[623,624,625],"code",{},"ai"," metadata, but you often want the same data inside your handler: to persist it, surface it to end-users, bill against it, or stream incremental progress to the client.",[619,628,629,632],{},[623,630,631],{},"AILogger"," exposes three methods for that, with no need to touch internal state.",[634,635,637,640],"h2",{"id":636},"getmetadata-final-snapshot",[623,638,639],{},"getMetadata()",": final snapshot",[619,642,643,644,647,648,650,651,654],{},"Returns a structured ",[623,645,646],{},"AIMetadata"," object that mirrors the ",[623,649,625],{}," field on the wide event. Safe to call at any point, including after the run completes or inside the AI SDK's ",[623,652,653],{},"onFinish",":",[656,657,663],"pre",{"className":658,"code":659,"filename":660,"language":661,"meta":662,"style":662},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { useLogger } from 'evlog'\nimport { createAILogger } from 'evlog\u002Fai'\nimport { generateText } from 'ai'\n\nexport default defineEventHandler(async (event) => {\n  const log = useLogger(event)\n  const ai = createAILogger(log, {\n    cost: { 'claude-sonnet-4.6': { input: 3, output: 15 } },\n  })\n\n  await generateText({\n    model: ai.wrap('anthropic\u002Fclaude-sonnet-4.6'),\n    prompt: 'Summarize this document',\n  })\n\n  const metadata = ai.getMetadata()\n\n  await db.aiRuns.insert({\n    userId: event.context.userId,\n    model: metadata.model,\n    inputTokens: metadata.inputTokens,\n    outputTokens: metadata.outputTokens,\n    estimatedCost: metadata.estimatedCost,\n    finishReason: metadata.finishReason,\n    responseId: metadata.responseId,\n  })\n\n  return { ok: true }\n})\n","server\u002Fapi\u002Fchat.post.ts","typescript","",[623,664,665,698,719,739,746,782,804,826,872,880,885,898,928,945,952,957,977,982,1004,1027,1043,1060,1077,1094,1111,1128,1135,1140,1160],{"__ignoreMap":662},[666,667,670,674,678,682,685,688,691,695],"span",{"class":668,"line":669},"line",1,[666,671,673],{"class":672},"s7zQu","import",[666,675,677],{"class":676},"sMK4o"," {",[666,679,681],{"class":680},"sTEyZ"," useLogger",[666,683,684],{"class":676}," }",[666,686,687],{"class":672}," from",[666,689,690],{"class":676}," '",[666,692,694],{"class":693},"sfazB","evlog",[666,696,697],{"class":676},"'\n",[666,699,701,703,705,708,710,712,714,717],{"class":668,"line":700},2,[666,702,673],{"class":672},[666,704,677],{"class":676},[666,706,707],{"class":680}," createAILogger",[666,709,684],{"class":676},[666,711,687],{"class":672},[666,713,690],{"class":676},[666,715,716],{"class":693},"evlog\u002Fai",[666,718,697],{"class":676},[666,720,722,724,726,729,731,733,735,737],{"class":668,"line":721},3,[666,723,673],{"class":672},[666,725,677],{"class":676},[666,727,728],{"class":680}," generateText",[666,730,684],{"class":676},[666,732,687],{"class":672},[666,734,690],{"class":676},[666,736,625],{"class":693},[666,738,697],{"class":676},[666,740,742],{"class":668,"line":741},4,[666,743,745],{"emptyLinePlaceholder":744},true,"\n",[666,747,749,752,755,759,762,766,769,773,776,779],{"class":668,"line":748},5,[666,750,751],{"class":672},"export",[666,753,754],{"class":672}," default",[666,756,758],{"class":757},"s2Zo4"," defineEventHandler",[666,760,761],{"class":680},"(",[666,763,765],{"class":764},"spNyl","async",[666,767,768],{"class":676}," (",[666,770,772],{"class":771},"sHdIc","event",[666,774,775],{"class":676},")",[666,777,778],{"class":764}," =>",[666,780,781],{"class":676}," {\n",[666,783,785,788,791,794,796,799,801],{"class":668,"line":784},6,[666,786,787],{"class":764},"  const",[666,789,790],{"class":680}," log",[666,792,793],{"class":676}," =",[666,795,681],{"class":757},[666,797,761],{"class":798},"swJcz",[666,800,772],{"class":680},[666,802,803],{"class":798},")\n",[666,805,807,809,812,814,816,818,821,824],{"class":668,"line":806},7,[666,808,787],{"class":764},[666,810,811],{"class":680}," ai",[666,813,793],{"class":676},[666,815,707],{"class":757},[666,817,761],{"class":798},[666,819,820],{"class":680},"log",[666,822,823],{"class":676},",",[666,825,781],{"class":676},[666,827,829,832,834,836,838,841,844,846,848,851,853,857,859,862,864,867,869],{"class":668,"line":828},8,[666,830,831],{"class":798},"    cost",[666,833,654],{"class":676},[666,835,677],{"class":676},[666,837,690],{"class":676},[666,839,840],{"class":798},"claude-sonnet-4.6",[666,842,843],{"class":676},"'",[666,845,654],{"class":676},[666,847,677],{"class":676},[666,849,850],{"class":798}," input",[666,852,654],{"class":676},[666,854,856],{"class":855},"sbssI"," 3",[666,858,823],{"class":676},[666,860,861],{"class":798}," output",[666,863,654],{"class":676},[666,865,866],{"class":855}," 15",[666,868,684],{"class":676},[666,870,871],{"class":676}," },\n",[666,873,875,878],{"class":668,"line":874},9,[666,876,877],{"class":676},"  }",[666,879,803],{"class":798},[666,881,883],{"class":668,"line":882},10,[666,884,745],{"emptyLinePlaceholder":744},[666,886,888,891,893,895],{"class":668,"line":887},11,[666,889,890],{"class":672},"  await",[666,892,728],{"class":757},[666,894,761],{"class":798},[666,896,897],{"class":676},"{\n",[666,899,901,904,906,908,911,914,916,918,921,923,925],{"class":668,"line":900},12,[666,902,903],{"class":798},"    model",[666,905,654],{"class":676},[666,907,811],{"class":680},[666,909,910],{"class":676},".",[666,912,913],{"class":757},"wrap",[666,915,761],{"class":798},[666,917,843],{"class":676},[666,919,920],{"class":693},"anthropic\u002Fclaude-sonnet-4.6",[666,922,843],{"class":676},[666,924,775],{"class":798},[666,926,927],{"class":676},",\n",[666,929,931,934,936,938,941,943],{"class":668,"line":930},13,[666,932,933],{"class":798},"    prompt",[666,935,654],{"class":676},[666,937,690],{"class":676},[666,939,940],{"class":693},"Summarize this document",[666,942,843],{"class":676},[666,944,927],{"class":676},[666,946,948,950],{"class":668,"line":947},14,[666,949,877],{"class":676},[666,951,803],{"class":798},[666,953,955],{"class":668,"line":954},15,[666,956,745],{"emptyLinePlaceholder":744},[666,958,960,962,965,967,969,971,974],{"class":668,"line":959},16,[666,961,787],{"class":764},[666,963,964],{"class":680}," metadata",[666,966,793],{"class":676},[666,968,811],{"class":680},[666,970,910],{"class":676},[666,972,973],{"class":757},"getMetadata",[666,975,976],{"class":798},"()\n",[666,978,980],{"class":668,"line":979},17,[666,981,745],{"emptyLinePlaceholder":744},[666,983,985,987,990,992,995,997,1000,1002],{"class":668,"line":984},18,[666,986,890],{"class":672},[666,988,989],{"class":680}," db",[666,991,910],{"class":676},[666,993,994],{"class":680},"aiRuns",[666,996,910],{"class":676},[666,998,999],{"class":757},"insert",[666,1001,761],{"class":798},[666,1003,897],{"class":676},[666,1005,1007,1010,1012,1015,1017,1020,1022,1025],{"class":668,"line":1006},19,[666,1008,1009],{"class":798},"    userId",[666,1011,654],{"class":676},[666,1013,1014],{"class":680}," event",[666,1016,910],{"class":676},[666,1018,1019],{"class":680},"context",[666,1021,910],{"class":676},[666,1023,1024],{"class":680},"userId",[666,1026,927],{"class":676},[666,1028,1030,1032,1034,1036,1038,1041],{"class":668,"line":1029},20,[666,1031,903],{"class":798},[666,1033,654],{"class":676},[666,1035,964],{"class":680},[666,1037,910],{"class":676},[666,1039,1040],{"class":680},"model",[666,1042,927],{"class":676},[666,1044,1046,1049,1051,1053,1055,1058],{"class":668,"line":1045},21,[666,1047,1048],{"class":798},"    inputTokens",[666,1050,654],{"class":676},[666,1052,964],{"class":680},[666,1054,910],{"class":676},[666,1056,1057],{"class":680},"inputTokens",[666,1059,927],{"class":676},[666,1061,1063,1066,1068,1070,1072,1075],{"class":668,"line":1062},22,[666,1064,1065],{"class":798},"    outputTokens",[666,1067,654],{"class":676},[666,1069,964],{"class":680},[666,1071,910],{"class":676},[666,1073,1074],{"class":680},"outputTokens",[666,1076,927],{"class":676},[666,1078,1080,1083,1085,1087,1089,1092],{"class":668,"line":1079},23,[666,1081,1082],{"class":798},"    estimatedCost",[666,1084,654],{"class":676},[666,1086,964],{"class":680},[666,1088,910],{"class":676},[666,1090,1091],{"class":680},"estimatedCost",[666,1093,927],{"class":676},[666,1095,1097,1100,1102,1104,1106,1109],{"class":668,"line":1096},24,[666,1098,1099],{"class":798},"    finishReason",[666,1101,654],{"class":676},[666,1103,964],{"class":680},[666,1105,910],{"class":676},[666,1107,1108],{"class":680},"finishReason",[666,1110,927],{"class":676},[666,1112,1114,1117,1119,1121,1123,1126],{"class":668,"line":1113},25,[666,1115,1116],{"class":798},"    responseId",[666,1118,654],{"class":676},[666,1120,964],{"class":680},[666,1122,910],{"class":676},[666,1124,1125],{"class":680},"responseId",[666,1127,927],{"class":676},[666,1129,1131,1133],{"class":668,"line":1130},26,[666,1132,877],{"class":676},[666,1134,803],{"class":798},[666,1136,1138],{"class":668,"line":1137},27,[666,1139,745],{"emptyLinePlaceholder":744},[666,1141,1143,1146,1148,1151,1153,1157],{"class":668,"line":1142},28,[666,1144,1145],{"class":672},"  return",[666,1147,677],{"class":676},[666,1149,1150],{"class":798}," ok",[666,1152,654],{"class":676},[666,1154,1156],{"class":1155},"sfNiH"," true",[666,1158,1159],{"class":676}," }\n",[666,1161,1163,1166],{"class":668,"line":1162},29,[666,1164,1165],{"class":676},"}",[666,1167,803],{"class":680},[619,1169,1170],{},"The snapshot is a fresh copy: mutating it never affects the underlying state or subsequent calls.",[634,1172,1174,1177],{"id":1173},"getestimatedcost-quick-cost-check",[623,1175,1176],{},"getEstimatedCost()",": quick cost check",[619,1179,1180,1181,1184,1185,1188,1189,1192],{},"Convenience for ",[623,1182,1183],{},"getMetadata().estimatedCost",". Returns the cost in dollars, or ",[623,1186,1187],{},"undefined"," if no ",[623,1190,1191],{},"cost"," map was provided or the model is not in the map.",[656,1194,1196],{"className":658,"code":1195,"language":661,"meta":662,"style":662},"const ai = createAILogger(log, {\n  cost: { 'claude-sonnet-4.6': { input: 3, output: 15 } },\n})\n\nawait generateText({ model: ai.wrap('anthropic\u002Fclaude-sonnet-4.6'), prompt })\n\nconst cost = ai.getEstimatedCost()\nconsole.log(`This call cost $${cost?.toFixed(4)}`)\n",[623,1197,1198,1218,1255,1261,1265,1307,1311,1329],{"__ignoreMap":662},[666,1199,1200,1203,1206,1209,1211,1214,1216],{"class":668,"line":669},[666,1201,1202],{"class":764},"const",[666,1204,1205],{"class":680}," ai ",[666,1207,1208],{"class":676},"=",[666,1210,707],{"class":757},[666,1212,1213],{"class":680},"(log",[666,1215,823],{"class":676},[666,1217,781],{"class":676},[666,1219,1220,1223,1225,1227,1229,1231,1233,1235,1237,1239,1241,1243,1245,1247,1249,1251,1253],{"class":668,"line":700},[666,1221,1222],{"class":798},"  cost",[666,1224,654],{"class":676},[666,1226,677],{"class":676},[666,1228,690],{"class":676},[666,1230,840],{"class":798},[666,1232,843],{"class":676},[666,1234,654],{"class":676},[666,1236,677],{"class":676},[666,1238,850],{"class":798},[666,1240,654],{"class":676},[666,1242,856],{"class":855},[666,1244,823],{"class":676},[666,1246,861],{"class":798},[666,1248,654],{"class":676},[666,1250,866],{"class":855},[666,1252,684],{"class":676},[666,1254,871],{"class":676},[666,1256,1257,1259],{"class":668,"line":721},[666,1258,1165],{"class":676},[666,1260,803],{"class":680},[666,1262,1263],{"class":668,"line":741},[666,1264,745],{"emptyLinePlaceholder":744},[666,1266,1267,1270,1272,1274,1277,1280,1282,1284,1286,1288,1290,1292,1294,1296,1298,1300,1303,1305],{"class":668,"line":748},[666,1268,1269],{"class":672},"await",[666,1271,728],{"class":757},[666,1273,761],{"class":680},[666,1275,1276],{"class":676},"{",[666,1278,1279],{"class":798}," model",[666,1281,654],{"class":676},[666,1283,811],{"class":680},[666,1285,910],{"class":676},[666,1287,913],{"class":757},[666,1289,761],{"class":680},[666,1291,843],{"class":676},[666,1293,920],{"class":693},[666,1295,843],{"class":676},[666,1297,775],{"class":680},[666,1299,823],{"class":676},[666,1301,1302],{"class":680}," prompt ",[666,1304,1165],{"class":676},[666,1306,803],{"class":680},[666,1308,1309],{"class":668,"line":784},[666,1310,745],{"emptyLinePlaceholder":744},[666,1312,1313,1315,1318,1320,1322,1324,1327],{"class":668,"line":806},[666,1314,1202],{"class":764},[666,1316,1317],{"class":680}," cost ",[666,1319,1208],{"class":676},[666,1321,811],{"class":680},[666,1323,910],{"class":676},[666,1325,1326],{"class":757},"getEstimatedCost",[666,1328,976],{"class":680},[666,1330,1331,1334,1336,1338,1340,1343,1346,1349,1351,1354,1357,1359,1362,1364,1367],{"class":668,"line":828},[666,1332,1333],{"class":680},"console",[666,1335,910],{"class":676},[666,1337,820],{"class":757},[666,1339,761],{"class":680},[666,1341,1342],{"class":676},"`",[666,1344,1345],{"class":693},"This call cost $",[666,1347,1348],{"class":676},"${",[666,1350,1191],{"class":680},[666,1352,1353],{"class":676},"?.",[666,1355,1356],{"class":757},"toFixed",[666,1358,761],{"class":680},[666,1360,1361],{"class":855},"4",[666,1363,775],{"class":680},[666,1365,1366],{"class":676},"}`",[666,1368,803],{"class":680},[634,1370,1372,1375],{"id":1371},"onupdatecallback-incremental-updates",[623,1373,1374],{},"onUpdate(callback)",": incremental updates",[619,1377,1378],{},"Subscribe to metadata updates. The callback fires every time the underlying state flushes:",[1380,1381,1382,1386,1393,1396],"ul",{},[1383,1384,1385],"li",{},"Once per step in multi-step agent runs",[1383,1387,1388,1389,1392],{},"Once per ",[623,1390,1391],{},"captureEmbed"," call",[1383,1394,1395],{},"On model errors",[1383,1397,1398,1399,1402,1403,1406,1407,1409],{},"On ",[623,1400,1401],{},"createEvlogIntegration","'s ",[623,1404,1405],{},"onEnd"," (v7) or ",[623,1408,653],{}," (v6)",[619,1411,1412],{},"Each invocation receives a fresh snapshot. Returns an unsubscribe function. Subscriber errors are isolated and never break the AI flow.",[656,1414,1417],{"className":658,"code":1415,"filename":1416,"language":661,"meta":662,"style":662},"import { ToolLoopAgent, createAgentUIStreamResponse, stepCountIs } from 'ai'\nimport { useLogger } from 'evlog'\nimport { createAILogger } from 'evlog\u002Fai'\n\nexport default defineEventHandler(async (event) => {\n  const log = useLogger(event)\n  const { messages } = await readBody(event)\n  const ai = createAILogger(log)\n\n  ai.onUpdate((metadata) => {\n    pushToClient(event, {\n      type: 'ai-progress',\n      step: metadata.steps,\n      tokens: metadata.totalTokens,\n      cost: metadata.estimatedCost,\n    })\n  })\n\n  const agent = new ToolLoopAgent({\n    model: ai.wrap('anthropic\u002Fclaude-sonnet-4.6'),\n    tools: { searchWeb, queryDatabase },\n    stopWhen: stepCountIs(5),\n  })\n\n  return createAgentUIStreamResponse({ agent, uiMessages: messages })\n})\n","server\u002Fapi\u002Fagent.post.ts",[623,1418,1419,1448,1466,1484,1488,1510,1526,1551,1567,1571,1594,1607,1623,1639,1655,1670,1677,1683,1687,1705,1729,1748,1766,1772,1776,1801],{"__ignoreMap":662},[666,1420,1421,1423,1425,1428,1430,1433,1435,1438,1440,1442,1444,1446],{"class":668,"line":669},[666,1422,673],{"class":672},[666,1424,677],{"class":676},[666,1426,1427],{"class":680}," ToolLoopAgent",[666,1429,823],{"class":676},[666,1431,1432],{"class":680}," createAgentUIStreamResponse",[666,1434,823],{"class":676},[666,1436,1437],{"class":680}," stepCountIs",[666,1439,684],{"class":676},[666,1441,687],{"class":672},[666,1443,690],{"class":676},[666,1445,625],{"class":693},[666,1447,697],{"class":676},[666,1449,1450,1452,1454,1456,1458,1460,1462,1464],{"class":668,"line":700},[666,1451,673],{"class":672},[666,1453,677],{"class":676},[666,1455,681],{"class":680},[666,1457,684],{"class":676},[666,1459,687],{"class":672},[666,1461,690],{"class":676},[666,1463,694],{"class":693},[666,1465,697],{"class":676},[666,1467,1468,1470,1472,1474,1476,1478,1480,1482],{"class":668,"line":721},[666,1469,673],{"class":672},[666,1471,677],{"class":676},[666,1473,707],{"class":680},[666,1475,684],{"class":676},[666,1477,687],{"class":672},[666,1479,690],{"class":676},[666,1481,716],{"class":693},[666,1483,697],{"class":676},[666,1485,1486],{"class":668,"line":741},[666,1487,745],{"emptyLinePlaceholder":744},[666,1489,1490,1492,1494,1496,1498,1500,1502,1504,1506,1508],{"class":668,"line":748},[666,1491,751],{"class":672},[666,1493,754],{"class":672},[666,1495,758],{"class":757},[666,1497,761],{"class":680},[666,1499,765],{"class":764},[666,1501,768],{"class":676},[666,1503,772],{"class":771},[666,1505,775],{"class":676},[666,1507,778],{"class":764},[666,1509,781],{"class":676},[666,1511,1512,1514,1516,1518,1520,1522,1524],{"class":668,"line":784},[666,1513,787],{"class":764},[666,1515,790],{"class":680},[666,1517,793],{"class":676},[666,1519,681],{"class":757},[666,1521,761],{"class":798},[666,1523,772],{"class":680},[666,1525,803],{"class":798},[666,1527,1528,1530,1532,1535,1537,1539,1542,1545,1547,1549],{"class":668,"line":806},[666,1529,787],{"class":764},[666,1531,677],{"class":676},[666,1533,1534],{"class":680}," messages",[666,1536,684],{"class":676},[666,1538,793],{"class":676},[666,1540,1541],{"class":672}," await",[666,1543,1544],{"class":757}," readBody",[666,1546,761],{"class":798},[666,1548,772],{"class":680},[666,1550,803],{"class":798},[666,1552,1553,1555,1557,1559,1561,1563,1565],{"class":668,"line":828},[666,1554,787],{"class":764},[666,1556,811],{"class":680},[666,1558,793],{"class":676},[666,1560,707],{"class":757},[666,1562,761],{"class":798},[666,1564,820],{"class":680},[666,1566,803],{"class":798},[666,1568,1569],{"class":668,"line":874},[666,1570,745],{"emptyLinePlaceholder":744},[666,1572,1573,1576,1578,1581,1583,1585,1588,1590,1592],{"class":668,"line":882},[666,1574,1575],{"class":680},"  ai",[666,1577,910],{"class":676},[666,1579,1580],{"class":757},"onUpdate",[666,1582,761],{"class":798},[666,1584,761],{"class":676},[666,1586,1587],{"class":771},"metadata",[666,1589,775],{"class":676},[666,1591,778],{"class":764},[666,1593,781],{"class":676},[666,1595,1596,1599,1601,1603,1605],{"class":668,"line":887},[666,1597,1598],{"class":757},"    pushToClient",[666,1600,761],{"class":798},[666,1602,772],{"class":680},[666,1604,823],{"class":676},[666,1606,781],{"class":676},[666,1608,1609,1612,1614,1616,1619,1621],{"class":668,"line":900},[666,1610,1611],{"class":798},"      type",[666,1613,654],{"class":676},[666,1615,690],{"class":676},[666,1617,1618],{"class":693},"ai-progress",[666,1620,843],{"class":676},[666,1622,927],{"class":676},[666,1624,1625,1628,1630,1632,1634,1637],{"class":668,"line":930},[666,1626,1627],{"class":798},"      step",[666,1629,654],{"class":676},[666,1631,964],{"class":680},[666,1633,910],{"class":676},[666,1635,1636],{"class":680},"steps",[666,1638,927],{"class":676},[666,1640,1641,1644,1646,1648,1650,1653],{"class":668,"line":947},[666,1642,1643],{"class":798},"      tokens",[666,1645,654],{"class":676},[666,1647,964],{"class":680},[666,1649,910],{"class":676},[666,1651,1652],{"class":680},"totalTokens",[666,1654,927],{"class":676},[666,1656,1657,1660,1662,1664,1666,1668],{"class":668,"line":954},[666,1658,1659],{"class":798},"      cost",[666,1661,654],{"class":676},[666,1663,964],{"class":680},[666,1665,910],{"class":676},[666,1667,1091],{"class":680},[666,1669,927],{"class":676},[666,1671,1672,1675],{"class":668,"line":959},[666,1673,1674],{"class":676},"    }",[666,1676,803],{"class":798},[666,1678,1679,1681],{"class":668,"line":979},[666,1680,877],{"class":676},[666,1682,803],{"class":798},[666,1684,1685],{"class":668,"line":984},[666,1686,745],{"emptyLinePlaceholder":744},[666,1688,1689,1691,1694,1696,1699,1701,1703],{"class":668,"line":1006},[666,1690,787],{"class":764},[666,1692,1693],{"class":680}," agent",[666,1695,793],{"class":676},[666,1697,1698],{"class":676}," new",[666,1700,1427],{"class":757},[666,1702,761],{"class":798},[666,1704,897],{"class":676},[666,1706,1707,1709,1711,1713,1715,1717,1719,1721,1723,1725,1727],{"class":668,"line":1029},[666,1708,903],{"class":798},[666,1710,654],{"class":676},[666,1712,811],{"class":680},[666,1714,910],{"class":676},[666,1716,913],{"class":757},[666,1718,761],{"class":798},[666,1720,843],{"class":676},[666,1722,920],{"class":693},[666,1724,843],{"class":676},[666,1726,775],{"class":798},[666,1728,927],{"class":676},[666,1730,1731,1734,1736,1738,1741,1743,1746],{"class":668,"line":1045},[666,1732,1733],{"class":798},"    tools",[666,1735,654],{"class":676},[666,1737,677],{"class":676},[666,1739,1740],{"class":680}," searchWeb",[666,1742,823],{"class":676},[666,1744,1745],{"class":680}," queryDatabase",[666,1747,871],{"class":676},[666,1749,1750,1753,1755,1757,1759,1762,1764],{"class":668,"line":1062},[666,1751,1752],{"class":798},"    stopWhen",[666,1754,654],{"class":676},[666,1756,1437],{"class":757},[666,1758,761],{"class":798},[666,1760,1761],{"class":855},"5",[666,1763,775],{"class":798},[666,1765,927],{"class":676},[666,1767,1768,1770],{"class":668,"line":1079},[666,1769,877],{"class":676},[666,1771,803],{"class":798},[666,1773,1774],{"class":668,"line":1096},[666,1775,745],{"emptyLinePlaceholder":744},[666,1777,1778,1780,1782,1784,1786,1788,1790,1793,1795,1797,1799],{"class":668,"line":1113},[666,1779,1145],{"class":672},[666,1781,1432],{"class":757},[666,1783,761],{"class":798},[666,1785,1276],{"class":676},[666,1787,1693],{"class":680},[666,1789,823],{"class":676},[666,1791,1792],{"class":798}," uiMessages",[666,1794,654],{"class":676},[666,1796,1534],{"class":680},[666,1798,684],{"class":676},[666,1800,803],{"class":798},[666,1802,1803,1805],{"class":668,"line":1130},[666,1804,1165],{"class":676},[666,1806,803],{"class":680},[619,1808,1809],{},"For one-off cleanup:",[656,1811,1813],{"className":658,"code":1812,"language":661,"meta":662,"style":662},"const off = ai.onUpdate((metadata) => { \u002F* ... *\u002F })\n\u002F\u002F later\noff()\n",[623,1814,1815,1850,1855],{"__ignoreMap":662},[666,1816,1817,1819,1822,1824,1826,1828,1830,1832,1834,1836,1838,1840,1842,1846,1848],{"class":668,"line":669},[666,1818,1202],{"class":764},[666,1820,1821],{"class":680}," off ",[666,1823,1208],{"class":676},[666,1825,811],{"class":680},[666,1827,910],{"class":676},[666,1829,1580],{"class":757},[666,1831,761],{"class":680},[666,1833,761],{"class":676},[666,1835,1587],{"class":771},[666,1837,775],{"class":676},[666,1839,778],{"class":764},[666,1841,677],{"class":676},[666,1843,1845],{"class":1844},"sHwdD"," \u002F* ... *\u002F",[666,1847,684],{"class":676},[666,1849,803],{"class":680},[666,1851,1852],{"class":668,"line":700},[666,1853,1854],{"class":1844},"\u002F\u002F later\n",[666,1856,1857,1860],{"class":668,"line":721},[666,1858,1859],{"class":757},"off",[666,1861,976],{"class":680},[634,1863,1865,1867],{"id":1864},"aimetadata-shape",[623,1866,646],{}," shape",[619,1869,1870,1872,1873,1875,1876,1878,1879,1881],{},[623,1871,646],{}," is a public type alias for the snapshot returned by ",[623,1874,639],{}," and passed to ",[623,1877,1580],{}," listeners. It has the same shape as the ",[623,1880,625],{}," field on the wide event.",[656,1883,1885],{"className":658,"code":1884,"language":661,"meta":662,"style":662},"import type { AIMetadata, AIMetadataListener } from 'evlog\u002Fai'\n\nfunction handleProgress(metadata: AIMetadata) {\n  console.log(`${metadata.calls} calls, $${metadata.estimatedCost ?? 0}`)\n}\n\nconst listener: AIMetadataListener = handleProgress\nai.onUpdate(listener)\n",[623,1886,1887,1914,1918,1939,1984,1989,1993,2009],{"__ignoreMap":662},[666,1888,1889,1891,1894,1896,1899,1901,1904,1906,1908,1910,1912],{"class":668,"line":669},[666,1890,673],{"class":672},[666,1892,1893],{"class":672}," type",[666,1895,677],{"class":676},[666,1897,1898],{"class":680}," AIMetadata",[666,1900,823],{"class":676},[666,1902,1903],{"class":680}," AIMetadataListener",[666,1905,684],{"class":676},[666,1907,687],{"class":672},[666,1909,690],{"class":676},[666,1911,716],{"class":693},[666,1913,697],{"class":676},[666,1915,1916],{"class":668,"line":700},[666,1917,745],{"emptyLinePlaceholder":744},[666,1919,1920,1923,1926,1928,1930,1932,1935,1937],{"class":668,"line":721},[666,1921,1922],{"class":764},"function",[666,1924,1925],{"class":757}," handleProgress",[666,1927,761],{"class":676},[666,1929,1587],{"class":771},[666,1931,654],{"class":676},[666,1933,1898],{"class":1934},"sBMFI",[666,1936,775],{"class":676},[666,1938,781],{"class":676},[666,1940,1941,1944,1946,1948,1950,1953,1955,1957,1960,1962,1965,1967,1969,1971,1974,1977,1980,1982],{"class":668,"line":741},[666,1942,1943],{"class":680},"  console",[666,1945,910],{"class":676},[666,1947,820],{"class":757},[666,1949,761],{"class":798},[666,1951,1952],{"class":676},"`${",[666,1954,1587],{"class":680},[666,1956,910],{"class":676},[666,1958,1959],{"class":680},"calls",[666,1961,1165],{"class":676},[666,1963,1964],{"class":693}," calls, $",[666,1966,1348],{"class":676},[666,1968,1587],{"class":680},[666,1970,910],{"class":676},[666,1972,1973],{"class":680},"estimatedCost ",[666,1975,1976],{"class":676},"??",[666,1978,1979],{"class":855}," 0",[666,1981,1366],{"class":676},[666,1983,803],{"class":798},[666,1985,1986],{"class":668,"line":748},[666,1987,1988],{"class":676},"}\n",[666,1990,1991],{"class":668,"line":784},[666,1992,745],{"emptyLinePlaceholder":744},[666,1994,1995,1997,2000,2002,2004,2006],{"class":668,"line":806},[666,1996,1202],{"class":764},[666,1998,1999],{"class":680}," listener",[666,2001,654],{"class":676},[666,2003,1903],{"class":1934},[666,2005,793],{"class":676},[666,2007,2008],{"class":680}," handleProgress\n",[666,2010,2011,2013,2015,2017],{"class":668,"line":828},[666,2012,625],{"class":680},[666,2014,910],{"class":676},[666,2016,1580],{"class":757},[666,2018,2019],{"class":680},"(listener)\n",[634,2021,2023],{"id":2022},"every-field-the-middleware-records","Every field the middleware records",[619,2025,2026,2027,654],{},"Every field that may show up under ",[623,2028,2029],{},"ai.*",[2031,2032,2033,2049],"table",{},[2034,2035,2036],"thead",{},[2037,2038,2039,2043,2046],"tr",{},[2040,2041,2042],"th",{},"Wide event field",[2040,2044,2045],{},"Source",[2040,2047,2048],{},"Description",[2050,2051,2052,2066,2081,2094,2120,2135,2150,2165,2180,2195,2210,2231,2255,2273,2293,2308,2321,2334,2347,2359,2371,2384,2403,2417,2434],"tbody",{},[2037,2053,2054,2060,2063],{},[2055,2056,2057],"td",{},[623,2058,2059],{},"ai.calls",[2055,2061,2062],{},"Call count",[2055,2064,2065],{},"Number of AI calls in this request",[2037,2067,2068,2073,2078],{},[2055,2069,2070],{},[623,2071,2072],{},"ai.model",[2055,2074,2075],{},[623,2076,2077],{},"response.modelId",[2055,2079,2080],{},"Model that served the response",[2037,2082,2083,2088,2091],{},[2055,2084,2085],{},[623,2086,2087],{},"ai.models",[2055,2089,2090],{},"All model IDs",[2055,2092,2093],{},"Array of all models used (only when > 1)",[2037,2095,2096,2101,2106],{},[2055,2097,2098],{},[623,2099,2100],{},"ai.provider",[2055,2102,2103],{},[623,2104,2105],{},"model.provider",[2055,2107,2108,2109,2112,2113,2112,2116,2119],{},"Provider (",[623,2110,2111],{},"anthropic",", ",[623,2114,2115],{},"openai",[623,2117,2118],{},"google",", etc.)",[2037,2121,2122,2127,2132],{},[2055,2123,2124],{},[623,2125,2126],{},"ai.inputTokens",[2055,2128,2129],{},[623,2130,2131],{},"usage.inputTokens.total",[2055,2133,2134],{},"Total input tokens across all calls",[2037,2136,2137,2142,2147],{},[2055,2138,2139],{},[623,2140,2141],{},"ai.outputTokens",[2055,2143,2144],{},[623,2145,2146],{},"usage.outputTokens.total",[2055,2148,2149],{},"Total output tokens across all calls",[2037,2151,2152,2157,2160],{},[2055,2153,2154],{},[623,2155,2156],{},"ai.totalTokens",[2055,2158,2159],{},"Computed",[2055,2161,2162],{},[623,2163,2164],{},"inputTokens + outputTokens",[2037,2166,2167,2172,2177],{},[2055,2168,2169],{},[623,2170,2171],{},"ai.cacheReadTokens",[2055,2173,2174],{},[623,2175,2176],{},"usage.inputTokens.cacheRead",[2055,2178,2179],{},"Tokens served from prompt cache",[2037,2181,2182,2187,2192],{},[2055,2183,2184],{},[623,2185,2186],{},"ai.cacheWriteTokens",[2055,2188,2189],{},[623,2190,2191],{},"usage.inputTokens.cacheWrite",[2055,2193,2194],{},"Tokens written to prompt cache",[2037,2196,2197,2202,2207],{},[2055,2198,2199],{},[623,2200,2201],{},"ai.reasoningTokens",[2055,2203,2204],{},[623,2205,2206],{},"usage.outputTokens.reasoning",[2055,2208,2209],{},"Reasoning tokens (extended thinking)",[2037,2211,2212,2217,2222],{},[2055,2213,2214],{},[623,2215,2216],{},"ai.finishReason",[2055,2218,2219],{},[623,2220,2221],{},"finishReason.unified",[2055,2223,2224,2225,2112,2228,2119],{},"Why generation ended (",[623,2226,2227],{},"stop",[623,2229,2230],{},"tool-calls",[2037,2232,2233,2238,2241],{},[2055,2234,2235],{},[623,2236,2237],{},"ai.toolCalls",[2055,2239,2240],{},"Content \u002F stream chunks",[2055,2242,2243,2246,2247,2250,2251,2254],{},[623,2244,2245],{},"string[]"," of tool names by default, or ",[623,2248,2249],{},"Array\u003C{ name, input }>"," when ",[623,2252,2253],{},"toolInputs"," is enabled",[2037,2256,2257,2262,2267],{},[2055,2258,2259],{},[623,2260,2261],{},"ai.responseId",[2055,2263,2264],{},[623,2265,2266],{},"response.id",[2055,2268,2269,2270,775],{},"Provider-assigned response ID (e.g. Anthropic's ",[623,2271,2272],{},"msg_...",[2037,2274,2275,2280,2286],{},[2055,2276,2277],{},[623,2278,2279],{},"ai.prompt",[2055,2281,2282,2283],{},"First call's ",[623,2284,2285],{},"params.prompt",[2055,2287,2288,2289,2292],{},"Formatted text of the prompt sent to the first model call (only when the ",[623,2290,2291],{},"prompt"," option is enabled)",[2037,2294,2295,2300,2302],{},[2055,2296,2297],{},[623,2298,2299],{},"ai.output",[2055,2301,2240],{},[2055,2303,2304,2305,2292],{},"Text generated by the last model call (only when the ",[623,2306,2307],{},"output",[2037,2309,2310,2315,2318],{},[2055,2311,2312],{},[623,2313,2314],{},"ai.steps",[2055,2316,2317],{},"Step count",[2055,2319,2320],{},"Number of LLM calls (only when > 1)",[2037,2322,2323,2328,2331],{},[2055,2324,2325],{},[623,2326,2327],{},"ai.stepsUsage",[2055,2329,2330],{},"Per-step accumulation",[2055,2332,2333],{},"Per-step token and tool call breakdown (only when > 1 step)",[2037,2335,2336,2341,2344],{},[2055,2337,2338],{},[623,2339,2340],{},"ai.msToFirstChunk",[2055,2342,2343],{},"Stream timing",[2055,2345,2346],{},"Time to first text chunk (streaming only)",[2037,2348,2349,2354,2356],{},[2055,2350,2351],{},[623,2352,2353],{},"ai.msToFinish",[2055,2355,2343],{},[2055,2357,2358],{},"Total stream duration (streaming only)",[2037,2360,2361,2366,2368],{},[2055,2362,2363],{},[623,2364,2365],{},"ai.tokensPerSecond",[2055,2367,2159],{},[2055,2369,2370],{},"Output tokens per second (streaming only)",[2037,2372,2373,2378,2381],{},[2055,2374,2375],{},[623,2376,2377],{},"ai.error",[2055,2379,2380],{},"Error capture",[2055,2382,2383],{},"Error message if a model call fails",[2037,2385,2386,2391,2394],{},[2055,2387,2388],{},[623,2389,2390],{},"ai.tools",[2055,2392,2393],{},"Telemetry integration",[2055,2395,2396,2397,2400,2401,775],{},"Per-tool ",[623,2398,2399],{},"{ name, durationMs, success, error? }"," (requires ",[623,2402,1401],{},[2037,2404,2405,2410,2412],{},[2055,2406,2407],{},[623,2408,2409],{},"ai.totalDurationMs",[2055,2411,2393],{},[2055,2413,2414,2415,775],{},"Total generation wall time (requires ",[623,2416,1401],{},[2037,2418,2419,2424,2428],{},[2055,2420,2421],{},[623,2422,2423],{},"ai.embedding",[2055,2425,2426],{},[623,2427,1391],{},[2055,2429,2430,2433],{},[623,2431,2432],{},"{ model?, tokens, dimensions?, count? }"," — embedding metadata",[2037,2435,2436,2441,2443],{},[2055,2437,2438],{},[623,2439,2440],{},"ai.estimatedCost",[2055,2442,2159],{},[2055,2444,2445,2446,2448],{},"Estimated cost in dollars (requires ",[623,2447,1191],{}," option)",[2450,2451,2452],"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 .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}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 pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}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 .sBMFI, html code.shiki .sBMFI{--shiki-light:#E2931D;--shiki-default:#FFCB6B;--shiki-dark:#FFCB6B}",{"title":662,"searchDepth":700,"depth":700,"links":2454},[2455,2457,2459,2461,2463],{"id":636,"depth":700,"text":2456},"getMetadata(): final snapshot",{"id":1173,"depth":700,"text":2458},"getEstimatedCost(): quick cost check",{"id":1371,"depth":700,"text":2460},"onUpdate(callback): incremental updates",{"id":1864,"depth":700,"text":2462},"AIMetadata shape",{"id":2022,"depth":700,"text":2023},"Read AI metadata from your handler — persist it, surface it to end-users, bill against it, or stream incremental progress to the client.","md",[2467,2470],{"label":41,"icon":44,"to":338,"color":2468,"variant":2469},"neutral","subtle",{"label":346,"icon":349,"to":347,"color":2468,"variant":2469},{},{"title":351,"icon":354},{"title":614,"description":2464},"oktUAcn6BKUbJm4OAL1HZzl7Y3h1SNXKFh-ZvcF32yE",[2476,2478],{"title":346,"path":347,"stem":348,"description":2477,"icon":349,"children":-1},"Configure prompt and output capture (with redaction and truncation), tool input capture, cost estimation per model, and error handling during AI calls.",{"title":356,"path":357,"stem":358,"description":2479,"icon":137,"children":-1},"Add tool execution timing and total wall time with createEvlogIntegration. Compose with other middleware like supermemory or guardrails.",1789294026212]