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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 v2.1.259 ·

New deferred_tools_record attachment tracks full tool schemas across turns

A new attachment records full deferred tool schemas and name-only announcements, diffed so only changes are re-emitted.

TierUnder the hoodhow much it should matter to you
Useful3my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaTool Loadingwhat it touches
KindInternal Changesin v2.1.259,
Under the hood No documentation found

A new attachment records full deferred tool schemas and name-only announcements, diffed so only changes are re-emitted.

A new deferred_tools_record attachment type now also records full tool input schemas (toolEntries) and name-only announcements (nameOnlyAnnouncements) alongside the existing per-turn deferred tool descriptions. These are diffed turn-over-turn so only new or changed entries are re-emitted.

See this entry in the whole of v2.1.259 →

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