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@langwatch/n8n-observability

v1.0.0

Published

LangWatch + n8n OpenTelemetry bootstrap (TypeScript, modern, preloadable).

Vulnerabilities

Powered byPowered by Snyk
  • 0High
  • 0Medium
  • 0Low

Links

Git

Maintainers

rchavesrchavesdrew.langwatchdrew.langwatch0xdeafcafe-langwatch0xdeafcafe-langwatch

Keywords

n8nopentelemetrylangwatchobservabilityotel

Readme

@langwatch/n8n-observability

This package provides the actual n8n instrumentation for LangWatch observability.
It is published to npm as @langwatch/n8n-observability.

For a guide on how to use this package, see the setup guide in the other readme.

Development

Prerequisites

  • Node.js ≥ 18
  • pnpm ≥ 8

Build

pnpm install
pnpm build

Build artifacts include:

  • dist/hooks.cjs → CommonJS entry for EXTERNAL_HOOK_FILES
  • dist/index.js → ESM programmatic API

Test & Lint

pnpm test
pnpm lint

Internals: How it Works

  • Registers LangWatch’s Node SDK (setupObservability) → OpenTelemetry tracer provider.
  • Locates the active n8n-core instance and patches WorkflowExecute:
    • processRunExecutionData → workflow span
    • processRunData → workflow span
    • runNode → per-node span
  • Patching is idempotent (guarded by WeakSet).

Span Model

  • Workflow spans (n8n.workflow.execute.*)
    Attributes: n8n.workflow.id, n8n.workflow.name; errors recorded as exception events.

  • Node spans (n8n.node.execute)
    Attributes under n8n.node.* (type, name, etc.); optional JSON I/O capture; errors recorded as exception events.

Privacy

Inputs/outputs come from INodeExecutionData.json.
Disable capture with N8N_OTEL_CAPTURE_INPUT=false, or configure redaction rules in LangWatch.

Troubleshooting

  • No n8n-core patched

    • Set N8N_OTEL_DEBUG=1 to see search paths.
    • Verify EXTERNAL_HOOK_FILES points to dist/hooks.cjs.

  • setupObservability failed

    • Check LANGWATCH_API_KEY.
    • Verify network access to LangWatch.

  • No spans

    • Look for startup log: observability ready and patches applied.
    • Confirm I/O capture isn’t disabled if expecting inputs/outputs.

License

MIT. View the LICENSE file for details.