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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 ·

Remote MCP tool calls gain send/addressed callbacks

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Remote MCP tool dispatch gained callbacks for when a call is first sent and when a recipient acknowledges it.

TierUnder the hoodhow much it should matter to you
Useful2my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaRemote Toolswhat it touches
KindInternal Changesin v2.1.259,
Under the hood

Remote MCP tool dispatch gained callbacks for when a call is first sent and when a recipient acknowledges it.

The remote MCP tool-call dispatcher now accepts optional onFirstSend and onAddressed callbacks, fired when a tool call is sent over the transport and when a recipient acknowledges it.

See this entry in the whole of v2.1.259 →

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