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 v2.1.277 ·

System-prompt-block and request-content telemetry now fail closed

System-prompt-block and request-content telemetry no longer crash Claude Code if they fail

TierUnder the hoodhow much it should matter to you
Useful1my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaTelemetrywhat it touches
KindInternal Changesin v2.1.277,
Under the hood

System-prompt-block and request-content telemetry no longer crash Claude Code if they fail

What

Two internal telemetry functions, one that reports on system-prompt blocking (tengu_sysprompt_block) and a new wrapper around request-content telemetry, are now wrapped so that an error inside them no longer throws and interrupts anything. If telemetry fails, Claude Code just logs 'system prompt block telemetry failed' or 'request content telemetry failed' and moves on.

Why

Telemetry recording is meant to be a side effect, not something that can break your session. This change makes sure a bug in telemetry reporting can't cause a visible failure.

See this entry in the whole of v2.1.277 →