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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

← All of v2.1.221 Home All releases ←olderv2.1.220 v2.1.222newer→

Claude Code v2.1.221 3 Aug 2026

Channels: new "era" block reason per connection

You'll notice

Useful2 Signal0

Elsewhere

You now get a per-server notice when a connection's protocol version can't deliver channels.

What

The channels-unavailable banner has a case for connections whose protocol era has no channel delivery path.

Details

the notice is keyed per server name, so several such servers each raise their own notice
sits alongside the existing channels-unavailable reasons

Evidence

this connection's protocol version has no channel delivery path

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 →