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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 v2.1.221 ·

Five dead-code probes removed

Five more leftover diagnostic probes were deleted, with no change to what you see.

Under the hood Removed
JSON All of v2.1.221
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
TelemetryArea: what it touches
RemovedKind: in v2.1.221,
RemovedSection of the release
What

Telemetry probes that existed only to prove a code path was dead have been deleted, along with the scaffolding around them.

Details
Evidence

tengu_dead_probe_hook_updated_mcp_tool_output

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.221 →

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