feat(observability): integrate Langfuse for LLM request tracing#791

Merged

ding113 merged 10 commits intodevfrom

feat/langfuse-integration

Feb 15, 2026

Commits on Feb 15, 2026

feat(observability): integrate Langfuse for enterprise-grade LLM request tracing

ding113
and
factory-droid[bot]
committed
fix(observability): move Langfuse trace from proxy-handler to response-handler for complete data
ding113
committed
fix(langfuse): set trace-level input/output via updateTrace
ding113
committed
fix(langfuse): correct observation duration, cost key, and usage type names
ding113
committed
fix(langfuse): send raw cost without multiplier and use username as userId
ding113
committed
feat(langfuse): add multi-span hierarchy with guard-pipeline, provider-attempt events, and timing breakdown
ding113
committed
fix(langfuse): validate LANGFUSE_MAX_IO_SIZE via env schema and fix test mock
ding113
committed
feat(langfuse): actual request/response bodies, observation level, and cost breakdown
ding113
committed
refactor(langfuse): remove truncation and header redaction for raw observability
ding113
committed
docs(langfuse): clarify header security model in headersToRecord
ding113
committed