The internal code handling SDK (software development kit) control messages, such as mcp_set_servers, reload_plugins, reload_skills, reload_output_styles, mcp_reconnect, and mcp_call, was reorganized with renamed internal variables. The same validation rules, including the check that sdkMcpServers and webSearchIsolationExemptMcpServers must be arrays of strings, and the same underlying settings appear unchanged.
This looks like housekeeping rather than a behavior change; nothing here should affect how these commands work.
tengu_ptc_enabled Not enough to sayNothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.
This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.267: on
Read once, for one account on one subscription tier, against v2.1.267. It isn't a statement about your account. What a flag value here can and cannot tell you