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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.281 ·

tengu_context_size measures the tool schemas actually sent

The tengu_context_size event now measures tool schemas from the tool list actually sent, when one is recorded

Under the hood Internal Changes
JSON All of v2.1.281
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 v2.1.281,
Internal ChangesSection of the release
What

tengu_context_size is a usage event that reports how much space a request takes up. One of its figures is the size of the tool schemas. A tool schema is the description of a tool that is sent to the model so it knows the tool exists and how to use it. When a recorded list of the tools that were actually sent exists, that figure is now measured from that list.

Why

The reported size now matches what the model was really given, not an estimate built some other way.

See this entry in the whole of v2.1.281 →

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