5 curated breaking changes across major versions of sse-starlette. Use this as a migration checklist before bumping dependencies.
**Multi-Threading Support**: SSE now works correctly in multi-threaded applications
**Multi-Loop Support**: Full compatibility with multiple asyncio event loops
**Automatic Test Isolation**: No more manual state resets needed in tests
**Context-Local Events**: Replaced global state with context-aware event management **Development Experience**
Get this data programmatically \u2014 free, no authentication.
curl https://depscope.dev/api/breaking/pypi/sse-starlette**Modern APIs**: Updated to Starlette's lifespan parameter (no more deprecation warnings)