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Sweep 25 Sep 2026 · 19:33Z Build v2.1.283 504 read Stable v2.1.274 Latest v2.1.283 Next v2.1.283 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.281 ·

Attachment telemetry payload builder with token estimates

Telemetry about attachments now includes attachment types, estimated token counts and where the request came from

Entry
JSON All of v2.1.281
EntryKind: in v2.1.281,
ChangesSection of the release
What

A new helper fills in the usage data Claude Code sends back to Anthropic about attachments. It adds these fields:

  • attachment_types
  • attachment_token_estimates, rough sizes in tokens (the units Claude reads text in)
  • skill_listing_is_full
  • query_source
Why

This changes what is recorded about attachments, not how they behave.

See this entry in the whole of v2.1.281 →

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