Claude Code v2.1.221 ·
MCP connection-failure telemetry records negotiation outcome
Failed MCP connections now record how the handshake was negotiated and whether it fell back.
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.221,
Internal ChangesSection of the release
Details
- Two new field names, both absent from 2.1.220.
- A fallback records the reason
probe_failed.
Evidence
probeFellBack
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
See this entry in the whole of v2.1.221 →
