You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ProxyArea: what it touches
New FeaturesKind: in v2.1.229,
New FeaturesSection of the release
What
The local Anthropic-shaped proxy now sends a periodic SSE ping event whenever the upstream has gone quiet, so long thinking pauses no longer trip client or proxy idle timeouts. The stream wrapper takes a keepalive interval and enqueues a pre-encoded ping frame.
Details
The bundled Bedrock proxy guidance document was updated to state the same requirement for third-party proxies.
Evidence
emit your own \event: ping\ during silent gaps
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
