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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.309 ·

Usage data now tells failed tools apart from tools that never started

Claude Code's usage data now separates tool errors where the tool never started in this process from other errors

Under the hood Internal Changes
JSON All of v2.1.309
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 v2.1.309,
Internal ChangesSection of the release
What

In the usage data Claude Code reports about tool results, an error from a tool that never started in the current process is now recorded as its own kind. Before, it was recorded the same as any other error.

Why

This affects only the reported data and changes nothing you see.

See this entry in the whole of v2.1.309 →

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