[{"data":1,"prerenderedAt":2435},["ShallowReactive",2],{"navigation_docs":3,"-use-cases-ai-sdk-metadata":567,"-use-cases-ai-sdk-metadata-surround":2430},[4,30,80,133,313,444,503,542],{"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",[85,88,93,98,103,108,113,118,123,128],{"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,"icon":132},"Observability Score","\u002Fcli\u002Fobservability-score","3.cli\u002F9.observability-score","i-lucide-activity",{"title":134,"path":135,"stem":136,"children":137,"page":29},"Integrate","\u002Fintegrate","4.integrate",[138,142,225],{"title":36,"path":139,"stem":140,"icon":141},"\u002Fintegrate\u002Foverview","4.integrate\u002F0.overview","i-lucide-plug",{"title":143,"path":144,"stem":145,"children":146,"page":29},"Adapters","\u002Fintegrate\u002Fadapters","4.integrate\u002Fadapters",[147,150,180,205],{"title":36,"path":148,"stem":149,"icon":39},"\u002Fintegrate\u002Fadapters\u002Foverview","4.integrate\u002Fadapters\u002F01.overview",{"title":151,"path":152,"stem":153,"children":154,"page":29},"Cloud","\u002Fintegrate\u002Fadapters\u002Fcloud","4.integrate\u002Fadapters\u002Fcloud",[155,160,165,170,175],{"title":156,"path":157,"stem":158,"icon":159},"Axiom","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Faxiom","4.integrate\u002Fadapters\u002Fcloud\u002F01.axiom","i-custom-axiom",{"title":161,"path":162,"stem":163,"icon":164},"PostHog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fposthog","4.integrate\u002Fadapters\u002Fcloud\u002F02.posthog","i-simple-icons-posthog",{"title":166,"path":167,"stem":168,"icon":169},"Sentry","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fsentry","4.integrate\u002Fadapters\u002Fcloud\u002F03.sentry","i-simple-icons-sentry",{"title":171,"path":172,"stem":173,"icon":174},"Better Stack","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fbetter-stack","4.integrate\u002Fadapters\u002Fcloud\u002F04.better-stack","i-simple-icons-betterstack",{"title":176,"path":177,"stem":178,"icon":179},"Datadog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fdatadog","4.integrate\u002Fadapters\u002Fcloud\u002F05.datadog","i-simple-icons-datadog",{"title":181,"path":182,"stem":183,"children":184,"page":29},"Cloud or Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fhybrid","4.integrate\u002Fadapters\u002Fhybrid",[185,190,195,200],{"title":186,"path":187,"stem":188,"icon":189},"Grafana Loki","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Floki","4.integrate\u002Fadapters\u002Fhybrid\u002F01.loki","i-simple-icons-grafana",{"title":191,"path":192,"stem":193,"icon":194},"ClickHouse","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fclickhouse","4.integrate\u002Fadapters\u002Fhybrid\u002F02.clickhouse","i-simple-icons-clickhouse",{"title":196,"path":197,"stem":198,"icon":199},"OTLP","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fotlp","4.integrate\u002Fadapters\u002Fhybrid\u002F03.otlp","i-simple-icons-opentelemetry",{"title":201,"path":202,"stem":203,"icon":204},"HyperDX","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fhyperdx","4.integrate\u002Fadapters\u002Fhybrid\u002F04.hyperdx","i-custom-hyperdx",{"title":206,"path":207,"stem":208,"children":209,"page":29},"Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fself-hosted","4.integrate\u002Fadapters\u002Fself-hosted",[210,215,220],{"title":211,"path":212,"stem":213,"icon":214},"File System","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Ffs","4.integrate\u002Fadapters\u002Fself-hosted\u002F01.fs","i-lucide-hard-drive",{"title":216,"path":217,"stem":218,"icon":219},"NuxtHub","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fnuxthub","4.integrate\u002Fadapters\u002Fself-hosted\u002F02.nuxthub","i-simple-icons-nuxt",{"title":221,"path":222,"stem":223,"icon":224},"Memory","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fmemory","4.integrate\u002Fadapters\u002Fself-hosted\u002F03.memory","i-lucide-cpu",{"title":226,"path":227,"stem":228,"children":229,"page":29},"Frameworks","\u002Fintegrate\u002Fframeworks","4.integrate\u002Fframeworks",[230,234,239,244,249,254,259,264,269,274,279,284,289,294,298,303,308],{"title":36,"path":231,"stem":232,"icon":233},"\u002Fintegrate\u002Fframeworks\u002Foverview","4.integrate\u002Fframeworks\u002F00.overview","i-lucide-layout-grid",{"title":235,"path":236,"stem":237,"icon":238},"Nuxt","\u002Fintegrate\u002Fframeworks\u002Fnuxt","4.integrate\u002Fframeworks\u002F01.nuxt","i-simple-icons-nuxtdotjs",{"title":240,"path":241,"stem":242,"icon":243},"Next.js","\u002Fintegrate\u002Fframeworks\u002Fnextjs","4.integrate\u002Fframeworks\u002F02.nextjs","i-simple-icons-nextdotjs",{"title":245,"path":246,"stem":247,"icon":248},"SvelteKit","\u002Fintegrate\u002Fframeworks\u002Fsveltekit","4.integrate\u002Fframeworks\u002F03.sveltekit","i-simple-icons-svelte",{"title":250,"path":251,"stem":252,"icon":253},"Nitro","\u002Fintegrate\u002Fframeworks\u002Fnitro","4.integrate\u002Fframeworks\u002F04.nitro","i-custom-nitro",{"title":255,"path":256,"stem":257,"icon":258},"TanStack Start","\u002Fintegrate\u002Fframeworks\u002Ftanstack-start","4.integrate\u002Fframeworks\u002F05.tanstack-start","i-custom-tanstack",{"title":260,"path":261,"stem":262,"icon":263},"NestJS","\u002Fintegrate\u002Fframeworks\u002Fnestjs","4.integrate\u002Fframeworks\u002F06.nestjs","i-simple-icons-nestjs",{"title":265,"path":266,"stem":267,"icon":268},"Express","\u002Fintegrate\u002Fframeworks\u002Fexpress","4.integrate\u002Fframeworks\u002F07.express","i-simple-icons-express",{"title":270,"path":271,"stem":272,"icon":273},"Hono","\u002Fintegrate\u002Fframeworks\u002Fhono","4.integrate\u002Fframeworks\u002F08.hono","i-simple-icons-hono",{"title":275,"path":276,"stem":277,"icon":278},"Fastify","\u002Fintegrate\u002Fframeworks\u002Ffastify","4.integrate\u002Fframeworks\u002F09.fastify","i-simple-icons-fastify",{"title":280,"path":281,"stem":282,"icon":283},"Elysia","\u002Fintegrate\u002Fframeworks\u002Felysia","4.integrate\u002Fframeworks\u002F10.elysia","i-custom-elysia",{"title":285,"path":286,"stem":287,"icon":288},"React Router","\u002Fintegrate\u002Fframeworks\u002Freact-router","4.integrate\u002Fframeworks\u002F11.react-router","i-custom-reactrouter",{"title":290,"path":291,"stem":292,"icon":293},"Cloudflare Workers","\u002Fintegrate\u002Fframeworks\u002Fcloudflare-workers","4.integrate\u002Fframeworks\u002F12.cloudflare-workers","i-simple-icons-cloudflare",{"title":295,"path":296,"stem":297,"icon":74},"Standalone","\u002Fintegrate\u002Fframeworks\u002Fstandalone","4.integrate\u002Fframeworks\u002F13.standalone",{"title":299,"path":300,"stem":301,"icon":302},"Astro","\u002Fintegrate\u002Fframeworks\u002Fastro","4.integrate\u002Fframeworks\u002F14.astro","i-simple-icons-astro",{"title":304,"path":305,"stem":306,"icon":307},"oRPC","\u002Fintegrate\u002Fframeworks\u002Forpc","4.integrate\u002Fframeworks\u002F15.orpc","i-lucide-network",{"title":309,"path":310,"stem":311,"icon":312},"AWS Lambda","\u002Fintegrate\u002Fframeworks\u002Faws-lambda","4.integrate\u002Fframeworks\u002F16.aws-lambda","i-custom-lambda",{"title":314,"path":315,"stem":316,"children":317,"page":29},"Use Cases","\u002Fuse-cases","5.use-cases",[318,321,326,354,381,413,434,439],{"title":36,"path":319,"stem":320,"icon":102},"\u002Fuse-cases\u002Foverview","5.use-cases\u002F0.overview",{"title":322,"path":323,"stem":324,"icon":325},"Client Logging","\u002Fuse-cases\u002Fclient-logging","5.use-cases\u002F1.client-logging","i-lucide-monitor",{"title":327,"icon":328,"path":329,"stem":330,"children":331,"page":29},"AI SDK","i-simple-icons-vercel","\u002Fuse-cases\u002Fai-sdk","5.use-cases\u002F2.ai-sdk",[332,335,340,345,350],{"title":36,"path":333,"stem":334,"icon":39},"\u002Fuse-cases\u002Fai-sdk\u002Foverview","5.use-cases\u002F2.ai-sdk\u002F01.overview",{"title":336,"path":337,"stem":338,"icon":339},"Usage","\u002Fuse-cases\u002Fai-sdk\u002Fusage","5.use-cases\u002F2.ai-sdk\u002F02.usage","i-lucide-code",{"title":341,"path":342,"stem":343,"icon":344},"Options","\u002Fuse-cases\u002Fai-sdk\u002Foptions","5.use-cases\u002F2.ai-sdk\u002F03.options","i-lucide-sliders",{"title":346,"path":347,"stem":348,"icon":349},"Metadata","\u002Fuse-cases\u002Fai-sdk\u002Fmetadata","5.use-cases\u002F2.ai-sdk\u002F04.metadata","i-lucide-database",{"title":351,"path":352,"stem":353,"icon":132},"Telemetry","\u002Fuse-cases\u002Fai-sdk\u002Ftelemetry","5.use-cases\u002F2.ai-sdk\u002F05.telemetry",{"title":355,"icon":356,"path":357,"stem":358,"children":359,"page":29},"Better Auth","i-simple-icons-betterauth","\u002Fuse-cases\u002Fbetter-auth","5.use-cases\u002F3.better-auth",[360,363,368,373,377],{"title":36,"path":361,"stem":362,"icon":39},"\u002Fuse-cases\u002Fbetter-auth\u002Foverview","5.use-cases\u002F3.better-auth\u002F01.overview",{"title":364,"path":365,"stem":366,"icon":367},"Identify User","\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user","5.use-cases\u002F3.better-auth\u002F02.identify-user","i-lucide-user-check",{"title":369,"path":370,"stem":371,"icon":372},"Middleware","\u002Fuse-cases\u002Fbetter-auth\u002Fmiddleware","5.use-cases\u002F3.better-auth\u002F03.middleware","i-lucide-shield",{"title":374,"path":375,"stem":376,"icon":325},"Client Sync","\u002Fuse-cases\u002Fbetter-auth\u002Fclient-sync","5.use-cases\u002F3.better-auth\u002F04.client-sync",{"title":378,"path":379,"stem":380,"icon":107},"Performance","\u002Fuse-cases\u002Fbetter-auth\u002Fperformance","5.use-cases\u002F3.better-auth\u002F05.performance",{"title":382,"icon":383,"path":384,"stem":385,"children":386,"page":29},"Audit Logs","i-lucide-shield-check","\u002Fuse-cases\u002Faudit","5.use-cases\u002F4.audit",[387,390,395,400,405,409],{"title":36,"path":388,"stem":389,"icon":39},"\u002Fuse-cases\u002Faudit\u002Foverview","5.use-cases\u002F4.audit\u002F01.overview",{"title":391,"path":392,"stem":393,"icon":394},"Schema","\u002Fuse-cases\u002Faudit\u002Fschema","5.use-cases\u002F4.audit\u002F02.schema","i-lucide-file-text",{"title":396,"path":397,"stem":398,"icon":399},"Recording","\u002Fuse-cases\u002Faudit\u002Frecording","5.use-cases\u002F4.audit\u002F03.recording","i-lucide-pen-line",{"title":401,"path":402,"stem":403,"icon":404},"Drains","\u002Fuse-cases\u002Faudit\u002Fpipeline","5.use-cases\u002F4.audit\u002F04.pipeline","i-lucide-link",{"title":406,"path":407,"stem":408,"icon":383},"Compliance","\u002Fuse-cases\u002Faudit\u002Fcompliance","5.use-cases\u002F4.audit\u002F05.compliance",{"title":410,"path":411,"stem":412,"icon":79},"Recipes","\u002Fuse-cases\u002Faudit\u002Frecipes","5.use-cases\u002F4.audit\u002F06.recipes",{"title":351,"icon":107,"path":414,"stem":415,"children":416,"page":29},"\u002Fuse-cases\u002Ftelemetry","5.use-cases\u002F4.telemetry",[417,420,425,430],{"title":36,"path":418,"stem":419,"icon":39},"\u002Fuse-cases\u002Ftelemetry\u002Foverview","5.use-cases\u002F4.telemetry\u002F01.overview",{"title":421,"path":422,"stem":423,"icon":424},"Setup","\u002Fuse-cases\u002Ftelemetry\u002Fsetup","5.use-cases\u002F4.telemetry\u002F02.setup","i-lucide-wrench",{"title":426,"path":427,"stem":428,"icon":429},"Ingest","\u002Fuse-cases\u002Ftelemetry\u002Fingest","5.use-cases\u002F4.telemetry\u002F03.ingest","i-lucide-server",{"title":431,"path":432,"stem":433,"icon":79},"Reference","\u002Fuse-cases\u002Ftelemetry\u002Freference","5.use-cases\u002F4.telemetry\u002F04.reference",{"title":435,"path":436,"stem":437,"icon":438},"Enrichers","\u002Fuse-cases\u002Fenrichers","5.use-cases\u002F5.enrichers","i-lucide-sparkles",{"title":440,"path":441,"stem":442,"icon":443},"eve","\u002Fuse-cases\u002Feve","5.use-cases\u002F5.eve","i-custom-eve",{"title":445,"path":446,"stem":447,"children":448,"page":29},"Extend","\u002Fextend","6.extend",[449,453,458,463,467,472,476,480,484,488,493,498],{"title":36,"path":450,"stem":451,"icon":452},"\u002Fextend\u002Foverview","6.extend\u002F0.overview","i-lucide-blocks",{"title":454,"path":455,"stem":456,"icon":457},"Stream","\u002Fextend\u002Fstream","6.extend\u002F1.stream","i-lucide-radio-tower",{"title":459,"path":460,"stem":461,"icon":462},"Custom framework","\u002Fextend\u002Fcustom-framework","6.extend\u002F10.custom-framework","i-lucide-puzzle",{"title":464,"path":465,"stem":466,"icon":457},"Diagnostics channel","\u002Fextend\u002Fdiagnostics-channel","6.extend\u002F11.diagnostics-channel",{"title":468,"path":469,"stem":470,"icon":471},"FS reader","\u002Fextend\u002Ffs-reader","6.extend\u002F2.fs-reader","i-lucide-folder-search",{"title":410,"path":473,"stem":474,"icon":475},"\u002Fextend\u002Fconsumer-recipes","6.extend\u002F3.consumer-recipes","i-lucide-chef-hat",{"title":477,"path":478,"stem":479,"icon":452},"Plugins","\u002Fextend\u002Fplugins","6.extend\u002F4.plugins",{"title":481,"path":482,"stem":483,"icon":438},"Custom enrichers","\u002Fextend\u002Fcustom-enrichers","6.extend\u002F5.custom-enrichers",{"title":485,"path":486,"stem":487,"icon":64},"Tail sampling","\u002Fextend\u002Ftail-sampling","6.extend\u002F6.tail-sampling",{"title":489,"path":490,"stem":491,"icon":492},"Identity headers","\u002Fextend\u002Fidentity-headers","6.extend\u002F7.identity-headers","i-lucide-fingerprint",{"title":494,"path":495,"stem":496,"icon":497},"Custom drains","\u002Fextend\u002Fcustom-drains","6.extend\u002F8.custom-drains","i-lucide-share-2",{"title":499,"path":500,"stem":501,"icon":502},"Drain pipeline","\u002Fextend\u002Fdrain-pipeline","6.extend\u002F9.drain-pipeline","i-lucide-workflow",{"title":431,"path":504,"stem":505,"children":506,"page":29},"\u002Freference","7.reference",[507,511,516,519,524,528,533,537],{"title":36,"path":508,"stem":509,"icon":510},"\u002Freference\u002Foverview","7.reference\u002F0.overview","i-lucide-book-marked",{"title":512,"path":513,"stem":514,"icon":515},"Configuration","\u002Freference\u002Fconfiguration","7.reference\u002F1.configuration","i-lucide-settings",{"title":378,"path":517,"stem":518,"icon":107},"\u002Freference\u002Fperformance","7.reference\u002F2.performance",{"title":520,"path":521,"stem":522,"icon":523},"Vite Plugin","\u002Freference\u002Fvite-plugin","7.reference\u002F3.vite-plugin","i-custom-vite",{"title":525,"path":526,"stem":527,"icon":383},"Best Practices","\u002Freference\u002Fbest-practices","7.reference\u002F4.best-practices",{"title":529,"path":530,"stem":531,"icon":532},"vs Other Loggers","\u002Freference\u002Fvs-other-loggers","7.reference\u002F5.vs-other-loggers","i-lucide-scale",{"title":534,"path":535,"stem":536,"icon":438},"Agent Skills","\u002Freference\u002Fagent-skills","7.reference\u002F6.agent-skills",{"title":538,"path":539,"stem":540,"icon":541},"Cost","\u002Freference\u002Fcost","7.reference\u002F7.cost","i-lucide-receipt",{"title":543,"path":544,"stem":545,"children":546,"page":29},"Compare","\u002Fcompare","8.compare",[547,551,555,559,563],{"title":548,"path":549,"stem":550,"icon":532},"evlog vs Pino","\u002Fcompare\u002Fpino","8.compare\u002F1.pino",{"title":552,"path":553,"stem":554,"icon":199},"evlog vs OpenTelemetry","\u002Fcompare\u002Fopentelemetry","8.compare\u002F2.opentelemetry",{"title":556,"path":557,"stem":558,"icon":532},"evlog vs LogTape","\u002Fcompare\u002Flogtape","8.compare\u002F3.logtape",{"title":560,"path":561,"stem":562,"icon":532},"evlog vs Winston: formats and request events","\u002Fcompare\u002Fwinston","8.compare\u002F4.winston",{"title":564,"path":565,"stem":566,"icon":532},"evlog vs Consola: reporters and request context","\u002Fcompare\u002Fconsola","8.compare\u002F5.consola",{"id":568,"title":569,"body":570,"description":2419,"extension":2420,"links":2421,"meta":2426,"navigation":2427,"path":347,"seo":2428,"stem":348,"__hash__":2429},"docs\u002F5.use-cases\u002F2.ai-sdk\u002F04.metadata.md","Access Metadata",{"type":571,"value":572,"toc":2408},"minimark",[573,582,588,596,610,1123,1126,1133,1148,1324,1331,1334,1365,1368,1762,1765,1817,1823,1837,1975,1979,1985,2404],[574,575,576,577,581],"p",{},"The wide event already contains the full ",[578,579,580],"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.",[574,583,584,587],{},[578,585,586],{},"AILogger"," exposes three methods for that, with no need to touch internal state.",[589,590,592,595],"h2",{"id":591},"getmetadata-final-snapshot",[578,593,594],{},"getMetadata()",": final snapshot",[574,597,598,599,602,603,605,606,609],{},"Returns a structured ",[578,600,601],{},"AIMetadata"," object that mirrors the ",[578,604,580],{}," field on the wide event. Safe to call at any point, including after the run completes or inside the AI SDK's ",[578,607,608],{},"onFinish",":",[611,612,618],"pre",{"className":613,"code":614,"filename":615,"language":616,"meta":617,"style":617},"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","",[578,619,620,653,674,694,701,737,759,781,827,835,840,853,883,900,907,912,932,937,959,982,998,1015,1032,1049,1066,1083,1090,1095,1115],{"__ignoreMap":617},[621,622,625,629,633,637,640,643,646,650],"span",{"class":623,"line":624},"line",1,[621,626,628],{"class":627},"s7zQu","import",[621,630,632],{"class":631},"sMK4o"," {",[621,634,636],{"class":635},"sTEyZ"," useLogger",[621,638,639],{"class":631}," }",[621,641,642],{"class":627}," from",[621,644,645],{"class":631}," '",[621,647,649],{"class":648},"sfazB","evlog",[621,651,652],{"class":631},"'\n",[621,654,656,658,660,663,665,667,669,672],{"class":623,"line":655},2,[621,657,628],{"class":627},[621,659,632],{"class":631},[621,661,662],{"class":635}," createAILogger",[621,664,639],{"class":631},[621,666,642],{"class":627},[621,668,645],{"class":631},[621,670,671],{"class":648},"evlog\u002Fai",[621,673,652],{"class":631},[621,675,677,679,681,684,686,688,690,692],{"class":623,"line":676},3,[621,678,628],{"class":627},[621,680,632],{"class":631},[621,682,683],{"class":635}," generateText",[621,685,639],{"class":631},[621,687,642],{"class":627},[621,689,645],{"class":631},[621,691,580],{"class":648},[621,693,652],{"class":631},[621,695,697],{"class":623,"line":696},4,[621,698,700],{"emptyLinePlaceholder":699},true,"\n",[621,702,704,707,710,714,717,721,724,728,731,734],{"class":623,"line":703},5,[621,705,706],{"class":627},"export",[621,708,709],{"class":627}," default",[621,711,713],{"class":712},"s2Zo4"," defineEventHandler",[621,715,716],{"class":635},"(",[621,718,720],{"class":719},"spNyl","async",[621,722,723],{"class":631}," (",[621,725,727],{"class":726},"sHdIc","event",[621,729,730],{"class":631},")",[621,732,733],{"class":719}," =>",[621,735,736],{"class":631}," {\n",[621,738,740,743,746,749,751,754,756],{"class":623,"line":739},6,[621,741,742],{"class":719},"  const",[621,744,745],{"class":635}," log",[621,747,748],{"class":631}," =",[621,750,636],{"class":712},[621,752,716],{"class":753},"swJcz",[621,755,727],{"class":635},[621,757,758],{"class":753},")\n",[621,760,762,764,767,769,771,773,776,779],{"class":623,"line":761},7,[621,763,742],{"class":719},[621,765,766],{"class":635}," ai",[621,768,748],{"class":631},[621,770,662],{"class":712},[621,772,716],{"class":753},[621,774,775],{"class":635},"log",[621,777,778],{"class":631},",",[621,780,736],{"class":631},[621,782,784,787,789,791,793,796,799,801,803,806,808,812,814,817,819,822,824],{"class":623,"line":783},8,[621,785,786],{"class":753},"    cost",[621,788,609],{"class":631},[621,790,632],{"class":631},[621,792,645],{"class":631},[621,794,795],{"class":753},"claude-sonnet-4.6",[621,797,798],{"class":631},"'",[621,800,609],{"class":631},[621,802,632],{"class":631},[621,804,805],{"class":753}," input",[621,807,609],{"class":631},[621,809,811],{"class":810},"sbssI"," 3",[621,813,778],{"class":631},[621,815,816],{"class":753}," output",[621,818,609],{"class":631},[621,820,821],{"class":810}," 15",[621,823,639],{"class":631},[621,825,826],{"class":631}," },\n",[621,828,830,833],{"class":623,"line":829},9,[621,831,832],{"class":631},"  }",[621,834,758],{"class":753},[621,836,838],{"class":623,"line":837},10,[621,839,700],{"emptyLinePlaceholder":699},[621,841,843,846,848,850],{"class":623,"line":842},11,[621,844,845],{"class":627},"  await",[621,847,683],{"class":712},[621,849,716],{"class":753},[621,851,852],{"class":631},"{\n",[621,854,856,859,861,863,866,869,871,873,876,878,880],{"class":623,"line":855},12,[621,857,858],{"class":753},"    model",[621,860,609],{"class":631},[621,862,766],{"class":635},[621,864,865],{"class":631},".",[621,867,868],{"class":712},"wrap",[621,870,716],{"class":753},[621,872,798],{"class":631},[621,874,875],{"class":648},"anthropic\u002Fclaude-sonnet-4.6",[621,877,798],{"class":631},[621,879,730],{"class":753},[621,881,882],{"class":631},",\n",[621,884,886,889,891,893,896,898],{"class":623,"line":885},13,[621,887,888],{"class":753},"    prompt",[621,890,609],{"class":631},[621,892,645],{"class":631},[621,894,895],{"class":648},"Summarize this document",[621,897,798],{"class":631},[621,899,882],{"class":631},[621,901,903,905],{"class":623,"line":902},14,[621,904,832],{"class":631},[621,906,758],{"class":753},[621,908,910],{"class":623,"line":909},15,[621,911,700],{"emptyLinePlaceholder":699},[621,913,915,917,920,922,924,926,929],{"class":623,"line":914},16,[621,916,742],{"class":719},[621,918,919],{"class":635}," metadata",[621,921,748],{"class":631},[621,923,766],{"class":635},[621,925,865],{"class":631},[621,927,928],{"class":712},"getMetadata",[621,930,931],{"class":753},"()\n",[621,933,935],{"class":623,"line":934},17,[621,936,700],{"emptyLinePlaceholder":699},[621,938,940,942,945,947,950,952,955,957],{"class":623,"line":939},18,[621,941,845],{"class":627},[621,943,944],{"class":635}," db",[621,946,865],{"class":631},[621,948,949],{"class":635},"aiRuns",[621,951,865],{"class":631},[621,953,954],{"class":712},"insert",[621,956,716],{"class":753},[621,958,852],{"class":631},[621,960,962,965,967,970,972,975,977,980],{"class":623,"line":961},19,[621,963,964],{"class":753},"    userId",[621,966,609],{"class":631},[621,968,969],{"class":635}," event",[621,971,865],{"class":631},[621,973,974],{"class":635},"context",[621,976,865],{"class":631},[621,978,979],{"class":635},"userId",[621,981,882],{"class":631},[621,983,985,987,989,991,993,996],{"class":623,"line":984},20,[621,986,858],{"class":753},[621,988,609],{"class":631},[621,990,919],{"class":635},[621,992,865],{"class":631},[621,994,995],{"class":635},"model",[621,997,882],{"class":631},[621,999,1001,1004,1006,1008,1010,1013],{"class":623,"line":1000},21,[621,1002,1003],{"class":753},"    inputTokens",[621,1005,609],{"class":631},[621,1007,919],{"class":635},[621,1009,865],{"class":631},[621,1011,1012],{"class":635},"inputTokens",[621,1014,882],{"class":631},[621,1016,1018,1021,1023,1025,1027,1030],{"class":623,"line":1017},22,[621,1019,1020],{"class":753},"    outputTokens",[621,1022,609],{"class":631},[621,1024,919],{"class":635},[621,1026,865],{"class":631},[621,1028,1029],{"class":635},"outputTokens",[621,1031,882],{"class":631},[621,1033,1035,1038,1040,1042,1044,1047],{"class":623,"line":1034},23,[621,1036,1037],{"class":753},"    estimatedCost",[621,1039,609],{"class":631},[621,1041,919],{"class":635},[621,1043,865],{"class":631},[621,1045,1046],{"class":635},"estimatedCost",[621,1048,882],{"class":631},[621,1050,1052,1055,1057,1059,1061,1064],{"class":623,"line":1051},24,[621,1053,1054],{"class":753},"    finishReason",[621,1056,609],{"class":631},[621,1058,919],{"class":635},[621,1060,865],{"class":631},[621,1062,1063],{"class":635},"finishReason",[621,1065,882],{"class":631},[621,1067,1069,1072,1074,1076,1078,1081],{"class":623,"line":1068},25,[621,1070,1071],{"class":753},"    responseId",[621,1073,609],{"class":631},[621,1075,919],{"class":635},[621,1077,865],{"class":631},[621,1079,1080],{"class":635},"responseId",[621,1082,882],{"class":631},[621,1084,1086,1088],{"class":623,"line":1085},26,[621,1087,832],{"class":631},[621,1089,758],{"class":753},[621,1091,1093],{"class":623,"line":1092},27,[621,1094,700],{"emptyLinePlaceholder":699},[621,1096,1098,1101,1103,1106,1108,1112],{"class":623,"line":1097},28,[621,1099,1100],{"class":627},"  return",[621,1102,632],{"class":631},[621,1104,1105],{"class":753}," ok",[621,1107,609],{"class":631},[621,1109,1111],{"class":1110},"sfNiH"," true",[621,1113,1114],{"class":631}," }\n",[621,1116,1118,1121],{"class":623,"line":1117},29,[621,1119,1120],{"class":631},"}",[621,1122,758],{"class":635},[574,1124,1125],{},"The snapshot is a fresh copy: mutating it never affects the underlying state or subsequent calls.",[589,1127,1129,1132],{"id":1128},"getestimatedcost-quick-cost-check",[578,1130,1131],{},"getEstimatedCost()",": quick cost check",[574,1134,1135,1136,1139,1140,1143,1144,1147],{},"Convenience for ",[578,1137,1138],{},"getMetadata().estimatedCost",". Returns the cost in dollars, or ",[578,1141,1142],{},"undefined"," if no ",[578,1145,1146],{},"cost"," map was provided or the model is not in the map.",[611,1149,1151],{"className":613,"code":1150,"language":616,"meta":617,"style":617},"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",[578,1152,1153,1173,1210,1216,1220,1262,1266,1284],{"__ignoreMap":617},[621,1154,1155,1158,1161,1164,1166,1169,1171],{"class":623,"line":624},[621,1156,1157],{"class":719},"const",[621,1159,1160],{"class":635}," ai ",[621,1162,1163],{"class":631},"=",[621,1165,662],{"class":712},[621,1167,1168],{"class":635},"(log",[621,1170,778],{"class":631},[621,1172,736],{"class":631},[621,1174,1175,1178,1180,1182,1184,1186,1188,1190,1192,1194,1196,1198,1200,1202,1204,1206,1208],{"class":623,"line":655},[621,1176,1177],{"class":753},"  cost",[621,1179,609],{"class":631},[621,1181,632],{"class":631},[621,1183,645],{"class":631},[621,1185,795],{"class":753},[621,1187,798],{"class":631},[621,1189,609],{"class":631},[621,1191,632],{"class":631},[621,1193,805],{"class":753},[621,1195,609],{"class":631},[621,1197,811],{"class":810},[621,1199,778],{"class":631},[621,1201,816],{"class":753},[621,1203,609],{"class":631},[621,1205,821],{"class":810},[621,1207,639],{"class":631},[621,1209,826],{"class":631},[621,1211,1212,1214],{"class":623,"line":676},[621,1213,1120],{"class":631},[621,1215,758],{"class":635},[621,1217,1218],{"class":623,"line":696},[621,1219,700],{"emptyLinePlaceholder":699},[621,1221,1222,1225,1227,1229,1232,1235,1237,1239,1241,1243,1245,1247,1249,1251,1253,1255,1258,1260],{"class":623,"line":703},[621,1223,1224],{"class":627},"await",[621,1226,683],{"class":712},[621,1228,716],{"class":635},[621,1230,1231],{"class":631},"{",[621,1233,1234],{"class":753}," model",[621,1236,609],{"class":631},[621,1238,766],{"class":635},[621,1240,865],{"class":631},[621,1242,868],{"class":712},[621,1244,716],{"class":635},[621,1246,798],{"class":631},[621,1248,875],{"class":648},[621,1250,798],{"class":631},[621,1252,730],{"class":635},[621,1254,778],{"class":631},[621,1256,1257],{"class":635}," prompt ",[621,1259,1120],{"class":631},[621,1261,758],{"class":635},[621,1263,1264],{"class":623,"line":739},[621,1265,700],{"emptyLinePlaceholder":699},[621,1267,1268,1270,1273,1275,1277,1279,1282],{"class":623,"line":761},[621,1269,1157],{"class":719},[621,1271,1272],{"class":635}," cost ",[621,1274,1163],{"class":631},[621,1276,766],{"class":635},[621,1278,865],{"class":631},[621,1280,1281],{"class":712},"getEstimatedCost",[621,1283,931],{"class":635},[621,1285,1286,1289,1291,1293,1295,1298,1301,1304,1306,1309,1312,1314,1317,1319,1322],{"class":623,"line":783},[621,1287,1288],{"class":635},"console",[621,1290,865],{"class":631},[621,1292,775],{"class":712},[621,1294,716],{"class":635},[621,1296,1297],{"class":631},"`",[621,1299,1300],{"class":648},"This call cost $",[621,1302,1303],{"class":631},"${",[621,1305,1146],{"class":635},[621,1307,1308],{"class":631},"?.",[621,1310,1311],{"class":712},"toFixed",[621,1313,716],{"class":635},[621,1315,1316],{"class":810},"4",[621,1318,730],{"class":635},[621,1320,1321],{"class":631},"}`",[621,1323,758],{"class":635},[589,1325,1327,1330],{"id":1326},"onupdatecallback-incremental-updates",[578,1328,1329],{},"onUpdate(callback)",": incremental updates",[574,1332,1333],{},"Subscribe to metadata updates. The callback fires every time the underlying state flushes:",[1335,1336,1337,1341,1348,1351],"ul",{},[1338,1339,1340],"li",{},"Once per step in multi-step agent runs",[1338,1342,1343,1344,1347],{},"Once per ",[578,1345,1346],{},"captureEmbed"," call",[1338,1349,1350],{},"On model errors",[1338,1352,1353,1354,1357,1358,1361,1362,1364],{},"On ",[578,1355,1356],{},"createEvlogIntegration","'s ",[578,1359,1360],{},"onEnd"," (v7) or ",[578,1363,608],{}," (v6)",[574,1366,1367],{},"Each invocation receives a fresh snapshot. Returns an unsubscribe function. Subscriber errors are isolated and never break the AI flow.",[611,1369,1372],{"className":613,"code":1370,"filename":1371,"language":616,"meta":617,"style":617},"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",[578,1373,1374,1403,1421,1439,1443,1465,1481,1506,1522,1526,1549,1562,1578,1594,1610,1625,1632,1638,1642,1660,1684,1703,1721,1727,1731,1756],{"__ignoreMap":617},[621,1375,1376,1378,1380,1383,1385,1388,1390,1393,1395,1397,1399,1401],{"class":623,"line":624},[621,1377,628],{"class":627},[621,1379,632],{"class":631},[621,1381,1382],{"class":635}," ToolLoopAgent",[621,1384,778],{"class":631},[621,1386,1387],{"class":635}," createAgentUIStreamResponse",[621,1389,778],{"class":631},[621,1391,1392],{"class":635}," stepCountIs",[621,1394,639],{"class":631},[621,1396,642],{"class":627},[621,1398,645],{"class":631},[621,1400,580],{"class":648},[621,1402,652],{"class":631},[621,1404,1405,1407,1409,1411,1413,1415,1417,1419],{"class":623,"line":655},[621,1406,628],{"class":627},[621,1408,632],{"class":631},[621,1410,636],{"class":635},[621,1412,639],{"class":631},[621,1414,642],{"class":627},[621,1416,645],{"class":631},[621,1418,649],{"class":648},[621,1420,652],{"class":631},[621,1422,1423,1425,1427,1429,1431,1433,1435,1437],{"class":623,"line":676},[621,1424,628],{"class":627},[621,1426,632],{"class":631},[621,1428,662],{"class":635},[621,1430,639],{"class":631},[621,1432,642],{"class":627},[621,1434,645],{"class":631},[621,1436,671],{"class":648},[621,1438,652],{"class":631},[621,1440,1441],{"class":623,"line":696},[621,1442,700],{"emptyLinePlaceholder":699},[621,1444,1445,1447,1449,1451,1453,1455,1457,1459,1461,1463],{"class":623,"line":703},[621,1446,706],{"class":627},[621,1448,709],{"class":627},[621,1450,713],{"class":712},[621,1452,716],{"class":635},[621,1454,720],{"class":719},[621,1456,723],{"class":631},[621,1458,727],{"class":726},[621,1460,730],{"class":631},[621,1462,733],{"class":719},[621,1464,736],{"class":631},[621,1466,1467,1469,1471,1473,1475,1477,1479],{"class":623,"line":739},[621,1468,742],{"class":719},[621,1470,745],{"class":635},[621,1472,748],{"class":631},[621,1474,636],{"class":712},[621,1476,716],{"class":753},[621,1478,727],{"class":635},[621,1480,758],{"class":753},[621,1482,1483,1485,1487,1490,1492,1494,1497,1500,1502,1504],{"class":623,"line":761},[621,1484,742],{"class":719},[621,1486,632],{"class":631},[621,1488,1489],{"class":635}," messages",[621,1491,639],{"class":631},[621,1493,748],{"class":631},[621,1495,1496],{"class":627}," await",[621,1498,1499],{"class":712}," readBody",[621,1501,716],{"class":753},[621,1503,727],{"class":635},[621,1505,758],{"class":753},[621,1507,1508,1510,1512,1514,1516,1518,1520],{"class":623,"line":783},[621,1509,742],{"class":719},[621,1511,766],{"class":635},[621,1513,748],{"class":631},[621,1515,662],{"class":712},[621,1517,716],{"class":753},[621,1519,775],{"class":635},[621,1521,758],{"class":753},[621,1523,1524],{"class":623,"line":829},[621,1525,700],{"emptyLinePlaceholder":699},[621,1527,1528,1531,1533,1536,1538,1540,1543,1545,1547],{"class":623,"line":837},[621,1529,1530],{"class":635},"  ai",[621,1532,865],{"class":631},[621,1534,1535],{"class":712},"onUpdate",[621,1537,716],{"class":753},[621,1539,716],{"class":631},[621,1541,1542],{"class":726},"metadata",[621,1544,730],{"class":631},[621,1546,733],{"class":719},[621,1548,736],{"class":631},[621,1550,1551,1554,1556,1558,1560],{"class":623,"line":842},[621,1552,1553],{"class":712},"    pushToClient",[621,1555,716],{"class":753},[621,1557,727],{"class":635},[621,1559,778],{"class":631},[621,1561,736],{"class":631},[621,1563,1564,1567,1569,1571,1574,1576],{"class":623,"line":855},[621,1565,1566],{"class":753},"      type",[621,1568,609],{"class":631},[621,1570,645],{"class":631},[621,1572,1573],{"class":648},"ai-progress",[621,1575,798],{"class":631},[621,1577,882],{"class":631},[621,1579,1580,1583,1585,1587,1589,1592],{"class":623,"line":885},[621,1581,1582],{"class":753},"      step",[621,1584,609],{"class":631},[621,1586,919],{"class":635},[621,1588,865],{"class":631},[621,1590,1591],{"class":635},"steps",[621,1593,882],{"class":631},[621,1595,1596,1599,1601,1603,1605,1608],{"class":623,"line":902},[621,1597,1598],{"class":753},"      tokens",[621,1600,609],{"class":631},[621,1602,919],{"class":635},[621,1604,865],{"class":631},[621,1606,1607],{"class":635},"totalTokens",[621,1609,882],{"class":631},[621,1611,1612,1615,1617,1619,1621,1623],{"class":623,"line":909},[621,1613,1614],{"class":753},"      cost",[621,1616,609],{"class":631},[621,1618,919],{"class":635},[621,1620,865],{"class":631},[621,1622,1046],{"class":635},[621,1624,882],{"class":631},[621,1626,1627,1630],{"class":623,"line":914},[621,1628,1629],{"class":631},"    }",[621,1631,758],{"class":753},[621,1633,1634,1636],{"class":623,"line":934},[621,1635,832],{"class":631},[621,1637,758],{"class":753},[621,1639,1640],{"class":623,"line":939},[621,1641,700],{"emptyLinePlaceholder":699},[621,1643,1644,1646,1649,1651,1654,1656,1658],{"class":623,"line":961},[621,1645,742],{"class":719},[621,1647,1648],{"class":635}," agent",[621,1650,748],{"class":631},[621,1652,1653],{"class":631}," new",[621,1655,1382],{"class":712},[621,1657,716],{"class":753},[621,1659,852],{"class":631},[621,1661,1662,1664,1666,1668,1670,1672,1674,1676,1678,1680,1682],{"class":623,"line":984},[621,1663,858],{"class":753},[621,1665,609],{"class":631},[621,1667,766],{"class":635},[621,1669,865],{"class":631},[621,1671,868],{"class":712},[621,1673,716],{"class":753},[621,1675,798],{"class":631},[621,1677,875],{"class":648},[621,1679,798],{"class":631},[621,1681,730],{"class":753},[621,1683,882],{"class":631},[621,1685,1686,1689,1691,1693,1696,1698,1701],{"class":623,"line":1000},[621,1687,1688],{"class":753},"    tools",[621,1690,609],{"class":631},[621,1692,632],{"class":631},[621,1694,1695],{"class":635}," searchWeb",[621,1697,778],{"class":631},[621,1699,1700],{"class":635}," queryDatabase",[621,1702,826],{"class":631},[621,1704,1705,1708,1710,1712,1714,1717,1719],{"class":623,"line":1017},[621,1706,1707],{"class":753},"    stopWhen",[621,1709,609],{"class":631},[621,1711,1392],{"class":712},[621,1713,716],{"class":753},[621,1715,1716],{"class":810},"5",[621,1718,730],{"class":753},[621,1720,882],{"class":631},[621,1722,1723,1725],{"class":623,"line":1034},[621,1724,832],{"class":631},[621,1726,758],{"class":753},[621,1728,1729],{"class":623,"line":1051},[621,1730,700],{"emptyLinePlaceholder":699},[621,1732,1733,1735,1737,1739,1741,1743,1745,1748,1750,1752,1754],{"class":623,"line":1068},[621,1734,1100],{"class":627},[621,1736,1387],{"class":712},[621,1738,716],{"class":753},[621,1740,1231],{"class":631},[621,1742,1648],{"class":635},[621,1744,778],{"class":631},[621,1746,1747],{"class":753}," uiMessages",[621,1749,609],{"class":631},[621,1751,1489],{"class":635},[621,1753,639],{"class":631},[621,1755,758],{"class":753},[621,1757,1758,1760],{"class":623,"line":1085},[621,1759,1120],{"class":631},[621,1761,758],{"class":635},[574,1763,1764],{},"For one-off cleanup:",[611,1766,1768],{"className":613,"code":1767,"language":616,"meta":617,"style":617},"const off = ai.onUpdate((metadata) => { \u002F* ... *\u002F })\n\u002F\u002F later\noff()\n",[578,1769,1770,1805,1810],{"__ignoreMap":617},[621,1771,1772,1774,1777,1779,1781,1783,1785,1787,1789,1791,1793,1795,1797,1801,1803],{"class":623,"line":624},[621,1773,1157],{"class":719},[621,1775,1776],{"class":635}," off ",[621,1778,1163],{"class":631},[621,1780,766],{"class":635},[621,1782,865],{"class":631},[621,1784,1535],{"class":712},[621,1786,716],{"class":635},[621,1788,716],{"class":631},[621,1790,1542],{"class":726},[621,1792,730],{"class":631},[621,1794,733],{"class":719},[621,1796,632],{"class":631},[621,1798,1800],{"class":1799},"sHwdD"," \u002F* ... *\u002F",[621,1802,639],{"class":631},[621,1804,758],{"class":635},[621,1806,1807],{"class":623,"line":655},[621,1808,1809],{"class":1799},"\u002F\u002F later\n",[621,1811,1812,1815],{"class":623,"line":676},[621,1813,1814],{"class":712},"off",[621,1816,931],{"class":635},[589,1818,1820,1822],{"id":1819},"aimetadata-shape",[578,1821,601],{}," shape",[574,1824,1825,1827,1828,1830,1831,1833,1834,1836],{},[578,1826,601],{}," is a public type alias for the snapshot returned by ",[578,1829,594],{}," and passed to ",[578,1832,1535],{}," listeners. It has the same shape as the ",[578,1835,580],{}," field on the wide event.",[611,1838,1840],{"className":613,"code":1839,"language":616,"meta":617,"style":617},"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",[578,1841,1842,1869,1873,1894,1939,1944,1948,1964],{"__ignoreMap":617},[621,1843,1844,1846,1849,1851,1854,1856,1859,1861,1863,1865,1867],{"class":623,"line":624},[621,1845,628],{"class":627},[621,1847,1848],{"class":627}," type",[621,1850,632],{"class":631},[621,1852,1853],{"class":635}," AIMetadata",[621,1855,778],{"class":631},[621,1857,1858],{"class":635}," AIMetadataListener",[621,1860,639],{"class":631},[621,1862,642],{"class":627},[621,1864,645],{"class":631},[621,1866,671],{"class":648},[621,1868,652],{"class":631},[621,1870,1871],{"class":623,"line":655},[621,1872,700],{"emptyLinePlaceholder":699},[621,1874,1875,1878,1881,1883,1885,1887,1890,1892],{"class":623,"line":676},[621,1876,1877],{"class":719},"function",[621,1879,1880],{"class":712}," handleProgress",[621,1882,716],{"class":631},[621,1884,1542],{"class":726},[621,1886,609],{"class":631},[621,1888,1853],{"class":1889},"sBMFI",[621,1891,730],{"class":631},[621,1893,736],{"class":631},[621,1895,1896,1899,1901,1903,1905,1908,1910,1912,1915,1917,1920,1922,1924,1926,1929,1932,1935,1937],{"class":623,"line":696},[621,1897,1898],{"class":635},"  console",[621,1900,865],{"class":631},[621,1902,775],{"class":712},[621,1904,716],{"class":753},[621,1906,1907],{"class":631},"`${",[621,1909,1542],{"class":635},[621,1911,865],{"class":631},[621,1913,1914],{"class":635},"calls",[621,1916,1120],{"class":631},[621,1918,1919],{"class":648}," calls, $",[621,1921,1303],{"class":631},[621,1923,1542],{"class":635},[621,1925,865],{"class":631},[621,1927,1928],{"class":635},"estimatedCost ",[621,1930,1931],{"class":631},"??",[621,1933,1934],{"class":810}," 0",[621,1936,1321],{"class":631},[621,1938,758],{"class":753},[621,1940,1941],{"class":623,"line":703},[621,1942,1943],{"class":631},"}\n",[621,1945,1946],{"class":623,"line":739},[621,1947,700],{"emptyLinePlaceholder":699},[621,1949,1950,1952,1955,1957,1959,1961],{"class":623,"line":761},[621,1951,1157],{"class":719},[621,1953,1954],{"class":635}," listener",[621,1956,609],{"class":631},[621,1958,1858],{"class":1889},[621,1960,748],{"class":631},[621,1962,1963],{"class":635}," handleProgress\n",[621,1965,1966,1968,1970,1972],{"class":623,"line":783},[621,1967,580],{"class":635},[621,1969,865],{"class":631},[621,1971,1535],{"class":712},[621,1973,1974],{"class":635},"(listener)\n",[589,1976,1978],{"id":1977},"every-field-the-middleware-records","Every field the middleware records",[574,1980,1981,1982,609],{},"Every field that may show up under ",[578,1983,1984],{},"ai.*",[1986,1987,1988,2004],"table",{},[1989,1990,1991],"thead",{},[1992,1993,1994,1998,2001],"tr",{},[1995,1996,1997],"th",{},"Wide event field",[1995,1999,2000],{},"Source",[1995,2002,2003],{},"Description",[2005,2006,2007,2021,2036,2049,2075,2090,2105,2120,2135,2150,2165,2186,2210,2228,2248,2263,2276,2289,2302,2314,2326,2339,2358,2372,2389],"tbody",{},[1992,2008,2009,2015,2018],{},[2010,2011,2012],"td",{},[578,2013,2014],{},"ai.calls",[2010,2016,2017],{},"Call count",[2010,2019,2020],{},"Number of AI calls in this request",[1992,2022,2023,2028,2033],{},[2010,2024,2025],{},[578,2026,2027],{},"ai.model",[2010,2029,2030],{},[578,2031,2032],{},"response.modelId",[2010,2034,2035],{},"Model that served the response",[1992,2037,2038,2043,2046],{},[2010,2039,2040],{},[578,2041,2042],{},"ai.models",[2010,2044,2045],{},"All model IDs",[2010,2047,2048],{},"Array of all models used (only when > 1)",[1992,2050,2051,2056,2061],{},[2010,2052,2053],{},[578,2054,2055],{},"ai.provider",[2010,2057,2058],{},[578,2059,2060],{},"model.provider",[2010,2062,2063,2064,2067,2068,2067,2071,2074],{},"Provider (",[578,2065,2066],{},"anthropic",", ",[578,2069,2070],{},"openai",[578,2072,2073],{},"google",", etc.)",[1992,2076,2077,2082,2087],{},[2010,2078,2079],{},[578,2080,2081],{},"ai.inputTokens",[2010,2083,2084],{},[578,2085,2086],{},"usage.inputTokens.total",[2010,2088,2089],{},"Total input tokens across all calls",[1992,2091,2092,2097,2102],{},[2010,2093,2094],{},[578,2095,2096],{},"ai.outputTokens",[2010,2098,2099],{},[578,2100,2101],{},"usage.outputTokens.total",[2010,2103,2104],{},"Total output tokens across all calls",[1992,2106,2107,2112,2115],{},[2010,2108,2109],{},[578,2110,2111],{},"ai.totalTokens",[2010,2113,2114],{},"Computed",[2010,2116,2117],{},[578,2118,2119],{},"inputTokens + outputTokens",[1992,2121,2122,2127,2132],{},[2010,2123,2124],{},[578,2125,2126],{},"ai.cacheReadTokens",[2010,2128,2129],{},[578,2130,2131],{},"usage.inputTokens.cacheRead",[2010,2133,2134],{},"Tokens served from prompt cache",[1992,2136,2137,2142,2147],{},[2010,2138,2139],{},[578,2140,2141],{},"ai.cacheWriteTokens",[2010,2143,2144],{},[578,2145,2146],{},"usage.inputTokens.cacheWrite",[2010,2148,2149],{},"Tokens written to prompt cache",[1992,2151,2152,2157,2162],{},[2010,2153,2154],{},[578,2155,2156],{},"ai.reasoningTokens",[2010,2158,2159],{},[578,2160,2161],{},"usage.outputTokens.reasoning",[2010,2163,2164],{},"Reasoning tokens (extended thinking)",[1992,2166,2167,2172,2177],{},[2010,2168,2169],{},[578,2170,2171],{},"ai.finishReason",[2010,2173,2174],{},[578,2175,2176],{},"finishReason.unified",[2010,2178,2179,2180,2067,2183,2074],{},"Why generation ended (",[578,2181,2182],{},"stop",[578,2184,2185],{},"tool-calls",[1992,2187,2188,2193,2196],{},[2010,2189,2190],{},[578,2191,2192],{},"ai.toolCalls",[2010,2194,2195],{},"Content \u002F stream chunks",[2010,2197,2198,2201,2202,2205,2206,2209],{},[578,2199,2200],{},"string[]"," of tool names by default, or ",[578,2203,2204],{},"Array\u003C{ name, input }>"," when ",[578,2207,2208],{},"toolInputs"," is enabled",[1992,2211,2212,2217,2222],{},[2010,2213,2214],{},[578,2215,2216],{},"ai.responseId",[2010,2218,2219],{},[578,2220,2221],{},"response.id",[2010,2223,2224,2225,730],{},"Provider-assigned response ID (e.g. Anthropic's ",[578,2226,2227],{},"msg_...",[1992,2229,2230,2235,2241],{},[2010,2231,2232],{},[578,2233,2234],{},"ai.prompt",[2010,2236,2237,2238],{},"First call's ",[578,2239,2240],{},"params.prompt",[2010,2242,2243,2244,2247],{},"Formatted text of the prompt sent to the first model call (only when the ",[578,2245,2246],{},"prompt"," option is enabled)",[1992,2249,2250,2255,2257],{},[2010,2251,2252],{},[578,2253,2254],{},"ai.output",[2010,2256,2195],{},[2010,2258,2259,2260,2247],{},"Text generated by the last model call (only when the ",[578,2261,2262],{},"output",[1992,2264,2265,2270,2273],{},[2010,2266,2267],{},[578,2268,2269],{},"ai.steps",[2010,2271,2272],{},"Step count",[2010,2274,2275],{},"Number of LLM calls (only when > 1)",[1992,2277,2278,2283,2286],{},[2010,2279,2280],{},[578,2281,2282],{},"ai.stepsUsage",[2010,2284,2285],{},"Per-step accumulation",[2010,2287,2288],{},"Per-step token and tool call breakdown (only when > 1 step)",[1992,2290,2291,2296,2299],{},[2010,2292,2293],{},[578,2294,2295],{},"ai.msToFirstChunk",[2010,2297,2298],{},"Stream timing",[2010,2300,2301],{},"Time to first text chunk (streaming only)",[1992,2303,2304,2309,2311],{},[2010,2305,2306],{},[578,2307,2308],{},"ai.msToFinish",[2010,2310,2298],{},[2010,2312,2313],{},"Total stream duration (streaming only)",[1992,2315,2316,2321,2323],{},[2010,2317,2318],{},[578,2319,2320],{},"ai.tokensPerSecond",[2010,2322,2114],{},[2010,2324,2325],{},"Output tokens per second (streaming only)",[1992,2327,2328,2333,2336],{},[2010,2329,2330],{},[578,2331,2332],{},"ai.error",[2010,2334,2335],{},"Error capture",[2010,2337,2338],{},"Error message if a model call fails",[1992,2340,2341,2346,2349],{},[2010,2342,2343],{},[578,2344,2345],{},"ai.tools",[2010,2347,2348],{},"Telemetry integration",[2010,2350,2351,2352,2355,2356,730],{},"Per-tool ",[578,2353,2354],{},"{ name, durationMs, success, error? }"," (requires ",[578,2357,1356],{},[1992,2359,2360,2365,2367],{},[2010,2361,2362],{},[578,2363,2364],{},"ai.totalDurationMs",[2010,2366,2348],{},[2010,2368,2369,2370,730],{},"Total generation wall time (requires ",[578,2371,1356],{},[1992,2373,2374,2379,2383],{},[2010,2375,2376],{},[578,2377,2378],{},"ai.embedding",[2010,2380,2381],{},[578,2382,1346],{},[2010,2384,2385,2388],{},[578,2386,2387],{},"{ model?, tokens, dimensions?, count? }"," — embedding metadata",[1992,2390,2391,2396,2398],{},[2010,2392,2393],{},[578,2394,2395],{},"ai.estimatedCost",[2010,2397,2114],{},[2010,2399,2400,2401,2403],{},"Estimated cost in dollars (requires ",[578,2402,1146],{}," option)",[2405,2406,2407],"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":617,"searchDepth":655,"depth":655,"links":2409},[2410,2412,2414,2416,2418],{"id":591,"depth":655,"text":2411},"getMetadata(): final snapshot",{"id":1128,"depth":655,"text":2413},"getEstimatedCost(): quick cost check",{"id":1326,"depth":655,"text":2415},"onUpdate(callback): incremental updates",{"id":1819,"depth":655,"text":2417},"AIMetadata shape",{"id":1977,"depth":655,"text":1978},"Read AI metadata from your handler — persist it, surface it to end-users, bill against it, or stream incremental progress to the client.","md",[2422,2425],{"label":36,"icon":39,"to":333,"color":2423,"variant":2424},"neutral","subtle",{"label":341,"icon":344,"to":342,"color":2423,"variant":2424},{},{"title":346,"icon":349},{"title":569,"description":2419},"oktUAcn6BKUbJm4OAL1HZzl7Y3h1SNXKFh-ZvcF32yE",[2431,2433],{"title":341,"path":342,"stem":343,"description":2432,"icon":344,"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":351,"path":352,"stem":353,"description":2434,"icon":132,"children":-1},"Add tool execution timing and total wall time with createEvlogIntegration. Compose with other middleware like supermemory or guardrails.",1788921637634]