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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 telemetry events for MCP listing races and model-catalog comparisons

Two telemetry events were allowlisted, one for rejected MCP tool listings and one comparing served model catalogs.

TierUnder the hoodhow much it should matter to you
Useful1my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaMCPwhat it touches
KindInternal Changesin v2.1.259,
Under the hood No documentation found

Two telemetry events were allowlisted, one for rejected MCP tool listings and one comparing served model catalogs.

Two telemetry events are now allowlisted: tengu_mcp_listing_prior_rejected, fired when an MCP tool listing response is rejected because a newer one already arrived, and a second event for comparing served model catalogs.

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Names in the bundletengu_mcp_listing_prior_rejected

See this entry in the whole of v2.1.259 →

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