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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 v2.1.265 ·

MCP resource metadata fetch de-duplication / discovery-state error type changed

Internal renames in the MCP OAuth login flow's error handling, with no apparent change in behavior

TierUnder the hoodhow much it should matter to you
Useful1my rating, 1 to 5
Signal0worth watching, 1 to 5
AreaMCPwhat it touches
KindInternal Changesin v2.1.265,
Under the hood

Internal renames in the MCP OAuth login flow's error handling, with no apparent change in behavior

What

Internal code in the MCP (Model Context Protocol) OAuth login flow was reworked: the check for a discovery-state error now looks for a differently-named error type, and several "persist failed" logging calls were renamed to use a different helper. This happened in both the regular and enterprise variants of the MCP OAuth client.

Why

These look like internal renames rather than a behavior change, so there's likely nothing for users to notice here.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhether this is purely a rename or also changes how discovery-state errors are detected in some edge case is not established by the…

See this entry in the whole of v2.1.265 →

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