Langfuse Upgrade & Migration Current State ! ! Overview Step-by-step guide for upgrading the Langfuse SDK across major versions. Covers v3 to v4 (OTel rewrite), v4 to v5, breaking changes, and automated codemods. Prerequisites - Existing Langfuse integration - Test suite covering traced operations - Git branch for the upgrade Version Roadmap | SDK | Package | Architecture | Status | |-----|---------|-------------|--------| | v3 | (single) | Custom, class | Legacy | | v4 | , , | OpenTelemetry-based | Stable | | v5 | , , | OpenTelemetry + improvements | Latest | Instructions Step 1: Check Curre…