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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.

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Claude Code v2.1.229

MCP OAuth repairs a stale saved client instead of re-registering

You'll notice
Useful3 Signal2
MCP not in their notes

A stale saved OAuth client for an MCP server is repaired in place instead of re-registered.

oauth.clientId
What

When a saved OAuth client for an MCP server has an out-of-date redirect URI, Claude Code no longer always forces a fresh dynamic registration. If a client ID is configured, it updates the stored entry in place, adopting that client ID and clearing the secret, or just bringing the redirect URI into line, and uses it. Failures to write the repair are logged.

Evidence

stale client_id repair

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.229 →