Dayuan Jiang
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fa1b02ad78
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feat: integrate Langfuse for LLM observability (#66)
* feat: integrate Langfuse for LLM observability
- Add instrumentation.ts with Langfuse OpenTelemetry exporter
- Enable experimental telemetry on streamText calls
- Add instrumentationHook to Next.js config
- Install required dependencies (@vercel/otel, langfuse-vercel, etc.)
* feat: add optional Langfuse observability integration
- Add session tracking with unique sessionId per conversation
- Add user tracking via IP address (x-forwarded-for header)
- Make telemetry conditional - only enabled if LANGFUSE_PUBLIC_KEY is set
- Add environment variable validation in instrumentation.ts
- Add sessionId validation (type check + 200 char limit)
- Update env.example with Langfuse configuration docs
- Remove unused langfuse-vercel and @vercel/otel packages
* fix: remove deprecated instrumentationHook (enabled by default in Next.js 15)
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2025-12-04 00:23:09 +09:00 |
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