Under the hood
Useful1 Signal2
Two SDK control messages got internal docs, including asking the host for a fresh token after a 401.
What's wrong with this entry?
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What
Two messages exchanged between the CLI and an SDK host gained internal documentation: one relays JSON-RPC to an MCP server the SDK hosts, the other asks the host for a fresh OAuth access token after a 401 when the CLI has no refresh token of its own. Behaviour is unchanged.
Evidence
@internal Request from the CLI subprocess to the SDK host for a fresh OAuth access token after a 401 with no local refresh token.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.