Under the hood
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MCP server config changes now trigger sync hooks to keep SDK hosts' binding state in sync.
The control-request handler for mcp_set_servers now calls a .sync("binding_changed") hook before applying server config changes, with a .sync("startup") hook invoked earlier during session init. This appears to be new plumbing for keeping an SDK host's server-binding state in sync with dynamic MCP server updates.
Names in the bundlemcp_set_servers