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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 v2.1.265 ·

New start/stop instrumentation around REPL inner tool execution

Claude Code now internally marks the start and end of each tool call for both local and remote execution

TierUnder the hoodhow much it should matter to you
Useful1my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaTelemetrywhat it touches
KindInternal Changesin v2.1.265,
Under the hood

Claude Code now internally marks the start and end of each tool call for both local and remote execution

What

The internal code path that runs a tool call, whether it executes on the local machine or on a remote host, now records a marker just before and just after the actual call.

Why

This is internal instrumentation. It does not change what happens when a tool runs, but lays groundwork for measuring or tracking tool execution more precisely.

See this entry in the whole of v2.1.265 →

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