> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tracelit.io/llms.txt
> Use this file to discover all available pages before exploring further.

# v0.1.0 — Apr 20, 2026

> Node.js SDK v0.1.0 — Apr 20, 2026

# v0.1.0 — Apr 20, 2026

**Initial release**

First public release of the Tracelit Node.js SDK:

* `Tracelit.configure()` + `Tracelit.start()` lifecycle
* Full auto-instrumentation via `@opentelemetry/auto-instrumentations-node` — Express, Fastify, pg, Mongoose, Redis, gRPC, GraphQL, Prisma, Kafka.js, Undici, and more
* `Tracelit.tracer` — standard OTel `Tracer` for manual span creation
* `Tracelit.metrics` — Counter, Histogram, and Gauge helpers with optional-chaining-safe `null` returns before `start()`
* Automatic `process.memory.rss` and `process.event_loop.lag` polling
* Console bridge for automatic log forwarding with trace correlation
* `ErrorAlwaysOnSampler` + `ErrorSpanProcessor` — errors always exported regardless of sampling
* Environment variable fallbacks for all config options
* Node.js ≥ 18, TypeScript ≥ 5, CJS + ESM