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## 5.16.0

**`(feat):`** Implement transparent SSE stream auto-reconnection for `resumable: true`
endpoints, bringing the Python SDK to parity with TypeScript and Go. When a
resumable stream ends prematurely, `EventSource` now re-issues the original
request with a `Last-Event-ID` header and resumes from the last *dispatched*
event id (never a parsed-but-undispatched id, avoiding silent event loss).
Reconnection is gated on a configured stream terminator, honors
`stream_reconnection_enabled` and `max_stream_reconnection_attempts` (with
reset-on-progress), backs off 1s by default (or the server `retry:` value,
clamped to 30s), guards against empty reconnect bodies, and remains
cancellable during the backoff delay. Supported for both sync and async
clients.