Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
TelemetryArea: what it touches
Internal ChangesKind: in v2.1.280,
Internal ChangesSection of the release
What
When a subprocess (a program Claude Code runs on your behalf) exits, Claude Code now tags the resulting error or exception with that process's exit code, using a new hidden marker called telemetryChildExitStatus. The exit code is checked to be a whole number within an expected range before being attached.
Why
This is internal bookkeeping: it lets Claude Code's telemetry pull the exact exit code out of an error later, rather than the failure being reported without that detail. It does not change any visible behavior.
