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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.274 ·

OAuth failure messages during tool-triggered MCP connect now include richer context

OAuth failure messages from tool-triggered MCP connections now include richer context

Under the hood Improvements
JSON All of v2.1.274
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.274,
ImprovementsSection of the release
What

When an OAuth authentication flow fails after being started by a tool call (for example, connecting to an MCP server), the error that gets logged and shown is now wrapped with additional context via a new helper before being reported, instead of showing the raw error text.

Why

This should make failures during tool-triggered OAuth connections easier to diagnose, since the reported error carries more context about what triggered it.

See this entry in the whole of v2.1.274 →

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