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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.268 ·

Bash tool telemetry gains detailed shell-command shape fields

Bash tool telemetry now records a detailed breakdown of each command's shape

TierUnder the hoodhow much it should matter to you
Useful2my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaTelemetrywhat it touches
KindInternal Changesin v2.1.268,
Under the hood

Bash tool telemetry now records a detailed breakdown of each command's shape

What

The telemetry events fired when a bash command succeeds (tengu_bash_tool_command_executed) or fails (tengu_bash_tool_command_failed) now include a much richer breakdown of the parsed command, on top of the existing command_type field:

  • the command's class and its first argument (argv0)
  • the last command's argv0 in a chain
  • whether it used pipes, redirects, chains, subshells, or heredocs
  • a count of simple commands within it
Why

This gives more detailed visibility into the structure of bash commands being run, which can help with understanding usage patterns and diagnosing issues, though the underlying tengu_bash_tool_command_executed and tengu_bash_tool_command_failed gates have no recorded reading yet.

See this entry in the whole of v2.1.268 →

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