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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.246 ·

MCP connections now report four auth-lifecycle moments to nobody

MCP now fires auth-loss and reconnect events that nothing in this build listens to.

Nothing to try yet Notable Internal Changes
JSON All of v2.1.246
Nothing to try yetTier: how much it should matter to you
1Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
MCPArea: what it touches
Internal ChangesKind: in v2.1.246,
What probably matters to youSection of the release

Four MCP auth-lifecycle events fire on lost auth, reconnect, cached-connection adoption and cached-dial failure, with no subscriber present.

What

MCP connection handling now fires events when authentication is lost mid-call, when a reconnect after re-authenticating reaches the connected state, when a cached connection is adopted, and when dialling a cached connection fails. Nothing in the build subscribes to any of them.

Details
  • The four are authLost, reauthReconnect, cachedAdopt and cachedDialFailed, none of which existed previously.
  • Every use of them in the build is a fire, never a listen, so they are instrumentation points waiting for a consumer.
Evidence

cachedDialFailed

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.246 →

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