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 v2.1.278 ·

SDK startup diagnostic message assignment bug fixed

Fixed a bug where a specific SDK shutdown reason never appeared in its own diagnostic log line

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KindBug Fixesin v2.1.278,
You'll notice

Fixed a bug where a specific SDK shutdown reason never appeared in its own diagnostic log line

What

In the SDK's startup-exit diagnostic logging, the code path for a permanently-closed transport (the connection used to talk to the SDK) was writing its message into the wrong variable, so that reason likely never actually showed up in the printed SDKStartup: exiting without result diagnostic line. This has been corrected.

Why

This means diagnostic logs for SDK shutdowns will now correctly report "transport closed permanently" as the reason when that's what happened, making it easier to debug why an SDK session exited.

See this entry in the whole of v2.1.278 →