Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.234,
Internal ChangesSection of the release
What
Connection events for MCP servers now record whether negotiation was denylisted and whether listening was suppressed, alongside the existing probe-fallback fields, making it visible when a server skipped protocol negotiation.
Evidence
negotiationDenylisted
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
