[{"data":1,"prerenderedAt":1249},["ShallowReactive",2],{"navigation_docs":3,"-extend-fs-reader":533,"-extend-fs-reader-surround":1244},[4,29,76,122,304,436,495],{"title":5,"path":6,"stem":7,"children":8,"page":28},"Start","\u002Fstart","1.start",[9,13,18,23],{"title":10,"path":11,"stem":12},"Introduction","\u002Fstart\u002Fintroduction","1.start\u002F1.introduction",{"title":14,"path":15,"stem":16,"icon":17},"Why start with evlog","\u002Fstart\u002Fwhy-evlog","1.start\u002F2.why-evlog","i-lucide-rocket",{"title":19,"path":20,"stem":21,"icon":22},"Installation","\u002Fstart\u002Finstallation","1.start\u002F3.installation","i-lucide-download",{"title":24,"path":25,"stem":26,"icon":27},"Quick Start","\u002Fstart\u002Fquick-start","1.start\u002F4.quick-start","i-lucide-zap",false,{"title":30,"path":31,"stem":32,"children":33,"page":28},"Learn","\u002Flearn","2.learn",[34,38,43,48,53,58,62,67,72],{"title":35,"path":36,"stem":37},"Learn evlog","\u002Flearn\u002Foverview","2.learn\u002F0.overview",{"title":39,"path":40,"stem":41,"icon":42},"Simple Logging","\u002Flearn\u002Fsimple-logging","2.learn\u002F1.simple-logging","i-lucide-terminal",{"title":44,"path":45,"stem":46,"icon":47},"Wide Events","\u002Flearn\u002Fwide-events","2.learn\u002F2.wide-events","i-lucide-layers",{"title":49,"path":50,"stem":51,"icon":52},"Structured Errors","\u002Flearn\u002Fstructured-errors","2.learn\u002F3.structured-errors","i-lucide-shield-alert",{"title":54,"path":55,"stem":56,"icon":57},"Lifecycle","\u002Flearn\u002Flifecycle","2.learn\u002F4.lifecycle","i-lucide-arrow-right-left",{"title":59,"path":60,"stem":61},"Sampling","\u002Flearn\u002Fsampling","2.learn\u002F5.sampling",{"title":63,"path":64,"stem":65,"icon":66},"Auto-Redaction","\u002Flearn\u002Fredaction","2.learn\u002F6.redaction","i-lucide-eye-off",{"title":68,"path":69,"stem":70,"icon":71},"Typed Fields","\u002Flearn\u002Ftyped-fields","2.learn\u002F7.typed-fields","i-simple-icons-typescript",{"title":73,"path":74,"stem":75},"Catalogs","\u002Flearn\u002Fcatalogs","2.learn\u002F8.catalogs",{"title":77,"path":78,"stem":79,"children":80,"page":28},"CLI","\u002Fcli","3.cli",[81,85,90,95,99,103,108,113,118],{"title":82,"path":83,"stem":84},"evlog CLI","\u002Fcli\u002Foverview","3.cli\u002F0.overview",{"title":86,"path":87,"stem":88,"icon":89},"init","\u002Fcli\u002Finit","3.cli\u002F1.init","i-lucide-wand-sparkles",{"title":91,"path":92,"stem":93,"icon":94},"map","\u002Fcli\u002Fmap","3.cli\u002F2.map","i-lucide-radar",{"title":96,"path":97,"stem":98},"Map rules","\u002Fcli\u002Frules","3.cli\u002F3.rules",{"title":100,"path":101,"stem":102},"Map scoring","\u002Fcli\u002Fscoring","3.cli\u002F4.scoring",{"title":104,"path":105,"stem":106,"icon":107},"CI","\u002Fcli\u002Fci","3.cli\u002F5.ci","i-lucide-git-pull-request",{"title":109,"path":110,"stem":111,"icon":112},"doctor","\u002Fcli\u002Fdoctor","3.cli\u002F6.doctor","i-lucide-stethoscope",{"title":114,"path":115,"stem":116,"icon":117},"telemetry","\u002Fcli\u002Ftelemetry","3.cli\u002F7.telemetry","i-lucide-bar-chart-3",{"title":119,"path":120,"stem":121},"evlog agents","\u002Fcli\u002Fagents","3.cli\u002F8.agents",{"title":123,"path":124,"stem":125,"children":126,"page":28},"Integrate","\u002Fintegrate","4.integrate",[127,132,216],{"title":128,"path":129,"stem":130,"icon":131},"Overview","\u002Fintegrate\u002Foverview","4.integrate\u002F0.overview","i-lucide-plug",{"title":133,"path":134,"stem":135,"children":136,"page":28},"Adapters","\u002Fintegrate\u002Fadapters","4.integrate\u002Fadapters",[137,141,171,196],{"title":128,"path":138,"stem":139,"icon":140},"\u002Fintegrate\u002Fadapters\u002Foverview","4.integrate\u002Fadapters\u002F01.overview","i-lucide-list",{"title":142,"path":143,"stem":144,"children":145,"page":28},"Cloud","\u002Fintegrate\u002Fadapters\u002Fcloud","4.integrate\u002Fadapters\u002Fcloud",[146,151,156,161,166],{"title":147,"path":148,"stem":149,"icon":150},"Axiom","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Faxiom","4.integrate\u002Fadapters\u002Fcloud\u002F01.axiom","i-custom-axiom",{"title":152,"path":153,"stem":154,"icon":155},"PostHog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fposthog","4.integrate\u002Fadapters\u002Fcloud\u002F02.posthog","i-simple-icons-posthog",{"title":157,"path":158,"stem":159,"icon":160},"Sentry","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fsentry","4.integrate\u002Fadapters\u002Fcloud\u002F03.sentry","i-simple-icons-sentry",{"title":162,"path":163,"stem":164,"icon":165},"Better Stack","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fbetter-stack","4.integrate\u002Fadapters\u002Fcloud\u002F04.better-stack","i-simple-icons-betterstack",{"title":167,"path":168,"stem":169,"icon":170},"Datadog","\u002Fintegrate\u002Fadapters\u002Fcloud\u002Fdatadog","4.integrate\u002Fadapters\u002Fcloud\u002F05.datadog","i-simple-icons-datadog",{"title":172,"path":173,"stem":174,"children":175,"page":28},"Cloud or Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fhybrid","4.integrate\u002Fadapters\u002Fhybrid",[176,181,186,191],{"title":177,"path":178,"stem":179,"icon":180},"Grafana Loki","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Floki","4.integrate\u002Fadapters\u002Fhybrid\u002F01.loki","i-simple-icons-grafana",{"title":182,"path":183,"stem":184,"icon":185},"ClickHouse","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fclickhouse","4.integrate\u002Fadapters\u002Fhybrid\u002F02.clickhouse","i-simple-icons-clickhouse",{"title":187,"path":188,"stem":189,"icon":190},"OTLP","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fotlp","4.integrate\u002Fadapters\u002Fhybrid\u002F03.otlp","i-simple-icons-opentelemetry",{"title":192,"path":193,"stem":194,"icon":195},"HyperDX","\u002Fintegrate\u002Fadapters\u002Fhybrid\u002Fhyperdx","4.integrate\u002Fadapters\u002Fhybrid\u002F04.hyperdx","i-custom-hyperdx",{"title":197,"path":198,"stem":199,"children":200,"page":28},"Self-Hosted","\u002Fintegrate\u002Fadapters\u002Fself-hosted","4.integrate\u002Fadapters\u002Fself-hosted",[201,206,211],{"title":202,"path":203,"stem":204,"icon":205},"File System","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Ffs","4.integrate\u002Fadapters\u002Fself-hosted\u002F01.fs","i-lucide-hard-drive",{"title":207,"path":208,"stem":209,"icon":210},"NuxtHub","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fnuxthub","4.integrate\u002Fadapters\u002Fself-hosted\u002F02.nuxthub","i-simple-icons-nuxt",{"title":212,"path":213,"stem":214,"icon":215},"Memory","\u002Fintegrate\u002Fadapters\u002Fself-hosted\u002Fmemory","4.integrate\u002Fadapters\u002Fself-hosted\u002F03.memory","i-lucide-cpu",{"title":217,"path":218,"stem":219,"children":220,"page":28},"Frameworks","\u002Fintegrate\u002Fframeworks","4.integrate\u002Fframeworks",[221,225,230,235,240,245,250,255,260,265,270,275,280,285,289,294,299],{"title":128,"path":222,"stem":223,"icon":224},"\u002Fintegrate\u002Fframeworks\u002Foverview","4.integrate\u002Fframeworks\u002F00.overview","i-lucide-layout-grid",{"title":226,"path":227,"stem":228,"icon":229},"Nuxt","\u002Fintegrate\u002Fframeworks\u002Fnuxt","4.integrate\u002Fframeworks\u002F01.nuxt","i-simple-icons-nuxtdotjs",{"title":231,"path":232,"stem":233,"icon":234},"Next.js","\u002Fintegrate\u002Fframeworks\u002Fnextjs","4.integrate\u002Fframeworks\u002F02.nextjs","i-simple-icons-nextdotjs",{"title":236,"path":237,"stem":238,"icon":239},"SvelteKit","\u002Fintegrate\u002Fframeworks\u002Fsveltekit","4.integrate\u002Fframeworks\u002F03.sveltekit","i-simple-icons-svelte",{"title":241,"path":242,"stem":243,"icon":244},"Nitro","\u002Fintegrate\u002Fframeworks\u002Fnitro","4.integrate\u002Fframeworks\u002F04.nitro","i-custom-nitro",{"title":246,"path":247,"stem":248,"icon":249},"TanStack Start","\u002Fintegrate\u002Fframeworks\u002Ftanstack-start","4.integrate\u002Fframeworks\u002F05.tanstack-start","i-custom-tanstack",{"title":251,"path":252,"stem":253,"icon":254},"NestJS","\u002Fintegrate\u002Fframeworks\u002Fnestjs","4.integrate\u002Fframeworks\u002F06.nestjs","i-simple-icons-nestjs",{"title":256,"path":257,"stem":258,"icon":259},"Express","\u002Fintegrate\u002Fframeworks\u002Fexpress","4.integrate\u002Fframeworks\u002F07.express","i-simple-icons-express",{"title":261,"path":262,"stem":263,"icon":264},"Hono","\u002Fintegrate\u002Fframeworks\u002Fhono","4.integrate\u002Fframeworks\u002F08.hono","i-simple-icons-hono",{"title":266,"path":267,"stem":268,"icon":269},"Fastify","\u002Fintegrate\u002Fframeworks\u002Ffastify","4.integrate\u002Fframeworks\u002F09.fastify","i-simple-icons-fastify",{"title":271,"path":272,"stem":273,"icon":274},"Elysia","\u002Fintegrate\u002Fframeworks\u002Felysia","4.integrate\u002Fframeworks\u002F10.elysia","i-custom-elysia",{"title":276,"path":277,"stem":278,"icon":279},"React Router","\u002Fintegrate\u002Fframeworks\u002Freact-router","4.integrate\u002Fframeworks\u002F11.react-router","i-custom-reactrouter",{"title":281,"path":282,"stem":283,"icon":284},"Cloudflare Workers","\u002Fintegrate\u002Fframeworks\u002Fcloudflare-workers","4.integrate\u002Fframeworks\u002F12.cloudflare-workers","i-simple-icons-cloudflare",{"title":286,"path":287,"stem":288,"icon":71},"Standalone","\u002Fintegrate\u002Fframeworks\u002Fstandalone","4.integrate\u002Fframeworks\u002F13.standalone",{"title":290,"path":291,"stem":292,"icon":293},"Astro","\u002Fintegrate\u002Fframeworks\u002Fastro","4.integrate\u002Fframeworks\u002F14.astro","i-simple-icons-astro",{"title":295,"path":296,"stem":297,"icon":298},"oRPC","\u002Fintegrate\u002Fframeworks\u002Forpc","4.integrate\u002Fframeworks\u002F15.orpc","i-lucide-network",{"title":300,"path":301,"stem":302,"icon":303},"AWS Lambda","\u002Fintegrate\u002Fframeworks\u002Faws-lambda","4.integrate\u002Fframeworks\u002F16.aws-lambda","i-custom-lambda",{"title":305,"path":306,"stem":307,"children":308,"page":28},"Use Cases","\u002Fuse-cases","5.use-cases",[309,312,317,346,374,407,427,432],{"title":305,"path":310,"stem":311},"\u002Fuse-cases\u002Foverview","5.use-cases\u002F0.overview",{"title":313,"path":314,"stem":315,"icon":316},"Client Logging","\u002Fuse-cases\u002Fclient-logging","5.use-cases\u002F1.client-logging","i-lucide-monitor",{"title":318,"icon":319,"path":320,"stem":321,"children":322,"page":28},"AI SDK","i-simple-icons-vercel","\u002Fuse-cases\u002Fai-sdk","5.use-cases\u002F2.ai-sdk",[323,326,331,336,341],{"title":128,"path":324,"stem":325,"icon":140},"\u002Fuse-cases\u002Fai-sdk\u002Foverview","5.use-cases\u002F2.ai-sdk\u002F01.overview",{"title":327,"path":328,"stem":329,"icon":330},"Usage","\u002Fuse-cases\u002Fai-sdk\u002Fusage","5.use-cases\u002F2.ai-sdk\u002F02.usage","i-lucide-code",{"title":332,"path":333,"stem":334,"icon":335},"Options","\u002Fuse-cases\u002Fai-sdk\u002Foptions","5.use-cases\u002F2.ai-sdk\u002F03.options","i-lucide-sliders",{"title":337,"path":338,"stem":339,"icon":340},"Metadata","\u002Fuse-cases\u002Fai-sdk\u002Fmetadata","5.use-cases\u002F2.ai-sdk\u002F04.metadata","i-lucide-database",{"title":342,"path":343,"stem":344,"icon":345},"Telemetry","\u002Fuse-cases\u002Fai-sdk\u002Ftelemetry","5.use-cases\u002F2.ai-sdk\u002F05.telemetry","i-lucide-activity",{"title":347,"icon":348,"path":349,"stem":350,"children":351,"page":28},"Better Auth","i-simple-icons-betterauth","\u002Fuse-cases\u002Fbetter-auth","5.use-cases\u002F3.better-auth",[352,355,360,365,369],{"title":128,"path":353,"stem":354,"icon":140},"\u002Fuse-cases\u002Fbetter-auth\u002Foverview","5.use-cases\u002F3.better-auth\u002F01.overview",{"title":356,"path":357,"stem":358,"icon":359},"Identify User","\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user","5.use-cases\u002F3.better-auth\u002F02.identify-user","i-lucide-user-check",{"title":361,"path":362,"stem":363,"icon":364},"Middleware","\u002Fuse-cases\u002Fbetter-auth\u002Fmiddleware","5.use-cases\u002F3.better-auth\u002F03.middleware","i-lucide-shield",{"title":366,"path":367,"stem":368,"icon":316},"Client Sync","\u002Fuse-cases\u002Fbetter-auth\u002Fclient-sync","5.use-cases\u002F3.better-auth\u002F04.client-sync",{"title":370,"path":371,"stem":372,"icon":373},"Performance","\u002Fuse-cases\u002Fbetter-auth\u002Fperformance","5.use-cases\u002F3.better-auth\u002F05.performance","i-lucide-gauge",{"title":375,"icon":376,"path":377,"stem":378,"children":379,"page":28},"Audit Logs","i-lucide-shield-check","\u002Fuse-cases\u002Faudit","5.use-cases\u002F4.audit",[380,383,388,393,398,402],{"title":128,"path":381,"stem":382,"icon":140},"\u002Fuse-cases\u002Faudit\u002Foverview","5.use-cases\u002F4.audit\u002F01.overview",{"title":384,"path":385,"stem":386,"icon":387},"Schema","\u002Fuse-cases\u002Faudit\u002Fschema","5.use-cases\u002F4.audit\u002F02.schema","i-lucide-file-text",{"title":389,"path":390,"stem":391,"icon":392},"Recording","\u002Fuse-cases\u002Faudit\u002Frecording","5.use-cases\u002F4.audit\u002F03.recording","i-lucide-pen-line",{"title":394,"path":395,"stem":396,"icon":397},"Drains","\u002Fuse-cases\u002Faudit\u002Fpipeline","5.use-cases\u002F4.audit\u002F04.pipeline","i-lucide-link",{"title":399,"path":400,"stem":401,"icon":376},"Compliance","\u002Fuse-cases\u002Faudit\u002Fcompliance","5.use-cases\u002F4.audit\u002F05.compliance",{"title":403,"path":404,"stem":405,"icon":406},"Recipes","\u002Fuse-cases\u002Faudit\u002Frecipes","5.use-cases\u002F4.audit\u002F06.recipes","i-lucide-book-open",{"title":342,"icon":373,"path":408,"stem":409,"children":410,"page":28},"\u002Fuse-cases\u002Ftelemetry","5.use-cases\u002F4.telemetry",[411,414,419,423],{"title":128,"path":412,"stem":413,"icon":140},"\u002Fuse-cases\u002Ftelemetry\u002Foverview","5.use-cases\u002F4.telemetry\u002F01.overview",{"title":415,"path":416,"stem":417,"icon":418},"Setup","\u002Fuse-cases\u002Ftelemetry\u002Fsetup","5.use-cases\u002F4.telemetry\u002F02.setup","i-lucide-wrench",{"title":420,"path":421,"stem":422},"Telemetry Ingest","\u002Fuse-cases\u002Ftelemetry\u002Fingest","5.use-cases\u002F4.telemetry\u002F03.ingest",{"title":424,"path":425,"stem":426,"icon":406},"Reference","\u002Fuse-cases\u002Ftelemetry\u002Freference","5.use-cases\u002F4.telemetry\u002F04.reference",{"title":428,"path":429,"stem":430,"icon":431},"Enrichers","\u002Fuse-cases\u002Fenrichers","5.use-cases\u002F5.enrichers","i-lucide-sparkles",{"title":433,"path":434,"stem":435},"eve","\u002Fuse-cases\u002Feve","5.use-cases\u002F5.eve",{"title":437,"path":438,"stem":439,"children":440,"page":28},"Extend","\u002Fextend","6.extend",[441,445,450,455,459,464,468,472,476,481,486,491],{"title":128,"path":442,"stem":443,"icon":444},"\u002Fextend\u002Foverview","6.extend\u002F0.overview","i-lucide-blocks",{"title":446,"path":447,"stem":448,"icon":449},"Stream","\u002Fextend\u002Fstream","6.extend\u002F1.stream","i-lucide-radio-tower",{"title":451,"path":452,"stem":453,"icon":454},"Custom framework","\u002Fextend\u002Fcustom-framework","6.extend\u002F10.custom-framework","i-lucide-puzzle",{"title":456,"path":457,"stem":458,"icon":449},"Diagnostics channel","\u002Fextend\u002Fdiagnostics-channel","6.extend\u002F11.diagnostics-channel",{"title":460,"path":461,"stem":462,"icon":463},"FS reader","\u002Fextend\u002Ffs-reader","6.extend\u002F2.fs-reader","i-lucide-folder-search",{"title":403,"path":465,"stem":466,"icon":467},"\u002Fextend\u002Fconsumer-recipes","6.extend\u002F3.consumer-recipes","i-lucide-chef-hat",{"title":469,"path":470,"stem":471},"Plugins","\u002Fextend\u002Fplugins","6.extend\u002F4.plugins",{"title":473,"path":474,"stem":475,"icon":431},"Custom enrichers","\u002Fextend\u002Fcustom-enrichers","6.extend\u002F5.custom-enrichers",{"title":477,"path":478,"stem":479,"icon":480},"Tail sampling","\u002Fextend\u002Ftail-sampling","6.extend\u002F6.tail-sampling","i-lucide-filter",{"title":482,"path":483,"stem":484,"icon":485},"Identity headers","\u002Fextend\u002Fidentity-headers","6.extend\u002F7.identity-headers","i-lucide-fingerprint",{"title":487,"path":488,"stem":489,"icon":490},"Custom drains","\u002Fextend\u002Fcustom-drains","6.extend\u002F8.custom-drains","i-lucide-share-2",{"title":492,"path":493,"stem":494},"Drain Pipeline","\u002Fextend\u002Fdrain-pipeline","6.extend\u002F9.drain-pipeline",{"title":424,"path":496,"stem":497,"children":498,"page":28},"\u002Freference","7.reference",[499,503,508,511,516,520,525,529],{"title":128,"path":500,"stem":501,"icon":502},"\u002Freference\u002Foverview","7.reference\u002F0.overview","i-lucide-book-marked",{"title":504,"path":505,"stem":506,"icon":507},"Configuration","\u002Freference\u002Fconfiguration","7.reference\u002F1.configuration","i-lucide-settings",{"title":370,"path":509,"stem":510,"icon":373},"\u002Freference\u002Fperformance","7.reference\u002F2.performance",{"title":512,"path":513,"stem":514,"icon":515},"Vite Plugin","\u002Freference\u002Fvite-plugin","7.reference\u002F3.vite-plugin","i-custom-vite",{"title":517,"path":518,"stem":519,"icon":376},"Best Practices","\u002Freference\u002Fbest-practices","7.reference\u002F4.best-practices",{"title":521,"path":522,"stem":523,"icon":524},"vs Other Loggers","\u002Freference\u002Fvs-other-loggers","7.reference\u002F5.vs-other-loggers","i-lucide-scale",{"title":526,"path":527,"stem":528,"icon":431},"Agent Skills","\u002Freference\u002Fagent-skills","7.reference\u002F6.agent-skills",{"title":530,"path":531,"stem":532},"Log cost","\u002Freference\u002Fcost","7.reference\u002F7.cost",{"id":534,"title":460,"body":535,"description":1237,"extension":1238,"links":1239,"meta":1240,"navigation":1241,"path":461,"seo":1242,"stem":462,"__hash__":1243},"docs\u002F6.extend\u002F2.fs-reader.md",{"type":536,"value":537,"toc":1228},"minimark",[538,573,576,650,655,823,829,833,934,937,941,1111,1121,1125,1183,1192,1196,1224],[539,540,541,542,546,547,551,552,555,556,559,560,563,564,567,568,572],"p",{},"The ",[543,544,545],"a",{"href":203},"filesystem drain"," writes wide events as NDJSON to ",[548,549,550],"code",{},".jsonl"," files under ",[548,553,554],{},".evlog\u002Flogs\u002F"," (one file per day, e.g. ",[548,557,558],{},"2026-05-08.jsonl",", plus rotation suffixes like ",[548,561,562],{},".1.jsonl"," when size-based rotation is enabled). The ",[548,565,566],{},"evlog\u002Ffs"," module also ships ",[569,570,571],"strong",{},"readers"," that let any Node tool replay or follow that history without hooking into the running app.",[574,575],"ndjson-tail",{},[577,578,581,584,642],"prompt",{":actions":579,"description":580,"icon":463},"[\"copy\",\"cursor\",\"claude\"]","Read or tail evlog NDJSON logs from disk",[539,582,583],{},"Build a script that consumes evlog's local NDJSON history (no app hook required).",[585,586,587,598,611,621,639],"ul",{},[588,589,590,591,593,594,597],"li",{},"Confirm the filesystem drain is wired up (",[548,592,566],{}," adapter writing NDJSON to ",[548,595,596],{},".evlog\u002Flogs\u002F*.jsonl",")",[588,599,600,601,604,605,607,608],{},"For replay: import ",[548,602,603],{},"readFsLogs"," from ",[548,606,566],{}," and iterate ",[548,609,610],{},"for await (const event of readFsLogs({ since, until, level, filter }))",[588,612,613,614,617,618],{},"For follow mode: import ",[548,615,616],{},"tailFsLogs"," and iterate the same way. It watches for new lines, handles rotation, and accepts an ",[548,619,620],{},"AbortSignal",[588,622,623,624,627,628,627,631,634,635,638],{},"Apply filters at read time (",[548,625,626],{},"level",", ",[548,629,630],{},"since",[548,632,633],{},"until",", custom ",[548,636,637],{},"filter"," predicate) instead of post-processing",[588,640,641],{},"Treat malformed lines as silently skipped (partial writes happen), and never crash the script on a bad line",[539,643,644,645],{},"Docs: ",[543,646,647],{"href":647,"rel":648},"https:\u002F\u002Fwww.evlog.dev\u002Fextend\u002Ffs-reader",[649],"nofollow",[651,652,654],"h2",{"id":653},"replay-history","Replay history",[656,657,662],"pre",{"className":658,"code":659,"language":660,"meta":661,"style":661},"language-ts shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","import { readFsLogs } from 'evlog\u002Ffs'\n\nfor await (const event of readFsLogs({ since: '2026-03-01', level: 'error' })) {\n  console.log(event.timestamp, event.action ?? event.message)\n}\n","ts","",[548,663,664,696,703,772,817],{"__ignoreMap":661},[665,666,669,673,677,681,684,687,690,693],"span",{"class":667,"line":668},"line",1,[665,670,672],{"class":671},"s7zQu","import",[665,674,676],{"class":675},"sMK4o"," {",[665,678,680],{"class":679},"sTEyZ"," readFsLogs",[665,682,683],{"class":675}," }",[665,685,686],{"class":671}," from",[665,688,689],{"class":675}," '",[665,691,566],{"class":692},"sfazB",[665,694,695],{"class":675},"'\n",[665,697,699],{"class":667,"line":698},2,[665,700,702],{"emptyLinePlaceholder":701},true,"\n",[665,704,706,709,712,715,719,722,725,728,731,734,738,741,743,746,749,752,755,757,759,762,764,766,769],{"class":667,"line":705},3,[665,707,708],{"class":671},"for",[665,710,711],{"class":671}," await",[665,713,714],{"class":679}," (",[665,716,718],{"class":717},"spNyl","const",[665,720,721],{"class":679}," event ",[665,723,724],{"class":675},"of",[665,726,680],{"class":727},"s2Zo4",[665,729,730],{"class":679},"(",[665,732,733],{"class":675},"{",[665,735,737],{"class":736},"swJcz"," since",[665,739,740],{"class":675},":",[665,742,689],{"class":675},[665,744,745],{"class":692},"2026-03-01",[665,747,748],{"class":675},"'",[665,750,751],{"class":675},",",[665,753,754],{"class":736}," level",[665,756,740],{"class":675},[665,758,689],{"class":675},[665,760,761],{"class":692},"error",[665,763,748],{"class":675},[665,765,683],{"class":675},[665,767,768],{"class":679},")) ",[665,770,771],{"class":675},"{\n",[665,773,775,778,781,784,786,789,791,794,796,799,801,804,807,809,811,814],{"class":667,"line":774},4,[665,776,777],{"class":679},"  console",[665,779,780],{"class":675},".",[665,782,783],{"class":727},"log",[665,785,730],{"class":736},[665,787,788],{"class":679},"event",[665,790,780],{"class":675},[665,792,793],{"class":679},"timestamp",[665,795,751],{"class":675},[665,797,798],{"class":679}," event",[665,800,780],{"class":675},[665,802,803],{"class":679},"action",[665,805,806],{"class":675}," ??",[665,808,798],{"class":679},[665,810,780],{"class":675},[665,812,813],{"class":679},"message",[665,815,816],{"class":736},")\n",[665,818,820],{"class":667,"line":819},5,[665,821,822],{"class":675},"}\n",[539,824,825,828],{},[548,826,827],{},"readFsLogs(options)"," walks the NDJSON files in chronological order, parses them line by line, and yields events that pass all filters. Files outside the date window are skipped entirely.",[830,831,332],"h3",{"id":832},"options",[834,835,836,852],"table",{},[837,838,839],"thead",{},[840,841,842,846,849],"tr",{},[843,844,845],"th",{},"Option",[843,847,848],{},"Type",[843,850,851],{},"Description",[853,854,855,874,891,906,920],"tbody",{},[840,856,857,863,868],{},[858,859,860],"td",{},[548,861,862],{},"dir",[858,864,865],{},[548,866,867],{},"string",[858,869,870,871,780],{},"Directory to read from. Default: ",[548,872,873],{},".evlog\u002Flogs",[840,875,876,880,885],{},[858,877,878],{},[548,879,630],{},[858,881,882],{},[548,883,884],{},"Date | string",[858,886,887,888,780],{},"Yield events with ",[548,889,890],{},"timestamp >= since",[840,892,893,897,901],{},[858,894,895],{},[548,896,633],{},[858,898,899],{},[548,900,884],{},[858,902,887,903,780],{},[548,904,905],{},"timestamp \u003C= until",[840,907,908,912,917],{},[858,909,910],{},[548,911,626],{},[858,913,914],{},[548,915,916],{},"LogLevel | LogLevel[]",[858,918,919],{},"Filter by event level.",[840,921,922,926,931],{},[858,923,924],{},[548,925,637],{},[858,927,928],{},[548,929,930],{},"(event) => boolean",[858,932,933],{},"Custom predicate.",[539,935,936],{},"Malformed lines (partial writes, manual edits) are silently skipped, so your script never crashes on a bad line.",[651,938,940],{"id":939},"live-tail","Live tail",[656,942,944],{"className":658,"code":943,"language":660,"meta":661,"style":661},"import { tailFsLogs } from 'evlog\u002Ffs'\n\nconst ac = new AbortController()\nprocess.on('SIGINT', () => ac.abort())\n\nfor await (const event of tailFsLogs({ signal: ac.signal })) {\n  console.log('live:', event.action ?? event.message)\n}\n",[548,945,946,965,969,988,1026,1030,1070,1106],{"__ignoreMap":661},[665,947,948,950,952,955,957,959,961,963],{"class":667,"line":668},[665,949,672],{"class":671},[665,951,676],{"class":675},[665,953,954],{"class":679}," tailFsLogs",[665,956,683],{"class":675},[665,958,686],{"class":671},[665,960,689],{"class":675},[665,962,566],{"class":692},[665,964,695],{"class":675},[665,966,967],{"class":667,"line":698},[665,968,702],{"emptyLinePlaceholder":701},[665,970,971,973,976,979,982,985],{"class":667,"line":705},[665,972,718],{"class":717},[665,974,975],{"class":679}," ac ",[665,977,978],{"class":675},"=",[665,980,981],{"class":675}," new",[665,983,984],{"class":727}," AbortController",[665,986,987],{"class":679},"()\n",[665,989,990,993,995,998,1000,1002,1005,1007,1009,1012,1015,1018,1020,1023],{"class":667,"line":774},[665,991,992],{"class":679},"process",[665,994,780],{"class":675},[665,996,997],{"class":727},"on",[665,999,730],{"class":679},[665,1001,748],{"class":675},[665,1003,1004],{"class":692},"SIGINT",[665,1006,748],{"class":675},[665,1008,751],{"class":675},[665,1010,1011],{"class":675}," ()",[665,1013,1014],{"class":717}," =>",[665,1016,1017],{"class":679}," ac",[665,1019,780],{"class":675},[665,1021,1022],{"class":727},"abort",[665,1024,1025],{"class":679},"())\n",[665,1027,1028],{"class":667,"line":819},[665,1029,702],{"emptyLinePlaceholder":701},[665,1031,1033,1035,1037,1039,1041,1043,1045,1047,1049,1051,1054,1056,1058,1060,1063,1066,1068],{"class":667,"line":1032},6,[665,1034,708],{"class":671},[665,1036,711],{"class":671},[665,1038,714],{"class":679},[665,1040,718],{"class":717},[665,1042,721],{"class":679},[665,1044,724],{"class":675},[665,1046,954],{"class":727},[665,1048,730],{"class":679},[665,1050,733],{"class":675},[665,1052,1053],{"class":736}," signal",[665,1055,740],{"class":675},[665,1057,1017],{"class":679},[665,1059,780],{"class":675},[665,1061,1062],{"class":679},"signal ",[665,1064,1065],{"class":675},"}",[665,1067,768],{"class":679},[665,1069,771],{"class":675},[665,1071,1073,1075,1077,1079,1081,1083,1086,1088,1090,1092,1094,1096,1098,1100,1102,1104],{"class":667,"line":1072},7,[665,1074,777],{"class":679},[665,1076,780],{"class":675},[665,1078,783],{"class":727},[665,1080,730],{"class":736},[665,1082,748],{"class":675},[665,1084,1085],{"class":692},"live:",[665,1087,748],{"class":675},[665,1089,751],{"class":675},[665,1091,798],{"class":679},[665,1093,780],{"class":675},[665,1095,803],{"class":679},[665,1097,806],{"class":675},[665,1099,798],{"class":679},[665,1101,780],{"class":675},[665,1103,813],{"class":679},[665,1105,816],{"class":736},[665,1107,1109],{"class":667,"line":1108},8,[665,1110,822],{"class":675},[539,1112,1113,1116,1117,1120],{},[548,1114,1115],{},"tailFsLogs(options)"," first yields existing events (unless ",[548,1118,1119],{},"fromEnd: true","), then keeps yielding new ones as they're appended, including events written into newly created daily files. Partial writes split across polls are recombined transparently.",[830,1122,1124],{"id":1123},"tail-specific-options","Tail-specific options",[834,1126,1127,1137],{},[837,1128,1129],{},[840,1130,1131,1133,1135],{},[843,1132,845],{},[843,1134,848],{},[843,1136,851],{},[853,1138,1139,1154,1169],{},[840,1140,1141,1146,1151],{},[858,1142,1143],{},[548,1144,1145],{},"pollIntervalMs",[858,1147,1148],{},[548,1149,1150],{},"number",[858,1152,1153],{},"Polling interval. Default: 500ms (minimum 50ms).",[840,1155,1156,1161,1166],{},[858,1157,1158],{},[548,1159,1160],{},"fromEnd",[858,1162,1163],{},[548,1164,1165],{},"boolean",[858,1167,1168],{},"Skip existing events; only yield future ones. Default: false.",[840,1170,1171,1176,1180],{},[858,1172,1173],{},[548,1174,1175],{},"signal",[858,1177,1178],{},[548,1179,620],{},[858,1181,1182],{},"Stop tailing when aborted.",[539,1184,1185,1186,1191],{},"All ",[543,1187,1189],{"href":1188},"#options",[548,1190,603],{}," options also apply.",[651,1193,1195],{"id":1194},"use-cases","Use cases",[585,1197,1198,1204,1207,1217],{},[588,1199,1200,1201,1203],{},"A local Electron \u002F Tauri dashboard reading ",[548,1202,554],{}," from a target project directory",[588,1205,1206],{},"A CI report aggregator that scans logs after a test run",[588,1208,1209,1210,1213,1214],{},"A ",[548,1211,1212],{},"grep","-style CLI that pipes filtered events into ",[548,1215,1216],{},"jq",[588,1218,1219,1220],{},"Replaying historic events into a dashboard before switching to a live in-process subscription. See the ",[543,1221,1223],{"href":1222},"\u002Fextend\u002Fconsumer-recipes#3-replay-history-then-go-live","replay-then-live recipe",[1225,1226,1227],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}",{"title":661,"searchDepth":698,"depth":698,"links":1229},[1230,1233,1236],{"id":653,"depth":698,"text":654,"children":1231},[1232],{"id":832,"depth":705,"text":332},{"id":939,"depth":698,"text":940,"children":1234},[1235],{"id":1123,"depth":705,"text":1124},{"id":1194,"depth":698,"text":1195},"Replay and tail the local NDJSON drain with readFsLogs and tailFsLogs — works in-process or from any external Node tool, survives restarts.","md",null,{},{"title":460,"icon":463},{"title":460,"description":1237},"R4g1MMNweLy_HA56RMBi-WG1D7Jb4XHOLc2nDmDbp2A",[1245,1247],{"title":456,"path":457,"stem":458,"description":1246,"icon":449,"children":-1},"Publish every wide event on a node:diagnostics_channel, so a consumer subscribes without importing evlog and Cloudflare can Tail Worker it.",{"title":403,"path":465,"stem":466,"description":1248,"icon":467,"children":-1},"Concrete copy-paste recipes — build your own minimal devtool, pipe to curl + jq, replay history then go live, and aggregate on the consumer side.",1786806601443]