Under the hood
No functional change found in MCP control-channel request handling, only internal variable renaming
What
A large section of code handling MCP control-channel requests (things like mcp_call, mcp_toggle, mcp_authenticate, apply_flag_settings, and related handlers) was reorganized, but the change appears to be limited to renaming internal variables.
Why
No behavior change is described here; this is bookkeeping in the code rather than something a user would notice.