Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.274 ·

SSE transport reconnect: fixed stale-variable bugs in header refresh and retry logging

Fixed a bug where refreshed auth headers weren't actually applied on SSE reconnect, and retry logs showed the wrong status

TierYou'll noticehow much it should matter to you
Useful1my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaInternalswhat it touches
KindBug Fixesin v2.1.274,
You'll notice

Fixed a bug where refreshed auth headers weren't actually applied on SSE reconnect, and retry logs showed the wrong status

What

When Claude Code's SSE (Server-Sent Events, a streaming connection type) transport reconnects, it refreshes authentication headers, but a bug meant the freshly computed headers weren't actually applied to the request — an undefined or stale variable was used instead. This is now fixed so the real refreshed headers are assigned. A related bug in POST-retry logging and telemetry, where the logged response status or error came from a mismatched variable left over from a previous iteration, is also fixed to report the actual current status.

Why

Before this fix, a reconnecting SSE connection could silently keep using stale credentials, and retry logs could report misleading status information, both of which made connection problems harder to diagnose.

See this entry in the whole of v2.1.274 →