Issue: --header / -H option is incorrectly available as a global option

Issue: --header / -H option is incorrectly available as a global option: a task in LegoFlow-SWE (Harbor dataset). Description: The --header (short form -H ) option is intended to allow users to pass custom HTTP headers when connecting to an MCP server. However, it is currently defined as a global…

The task

**Description:** The `--header` (short form `-H`) option is intended to allow users to pass custom HTTP headers when connecting to an MCP server. However, it is currently defined as a global option, causing it to appear in the top-level help text and be accepted before any command. In practice, headers only have…

Part of Lego-X/LegoFlow-SWE.