Claude Code v2.1.224 ·
MCP connection failures report a sibling probe result
Failed MCP connections now report an extra probe result for easier diagnosis.
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.224,
Internal ChangesSection of the release
What
The telemetry event for a failed MCP server connection carries one more field describing the probe, giving more detail when a server will not connect.
Details
probeSibling joins the existing negotiationMode, probeFellBack, errorCode and errorClassName fields.- The field name does not appear in the previous build.
Evidence
probeSibling
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
See this entry in the whole of v2.1.224 →
