Set Target Platform Overview This skill is the switcher side of the target-platform contract in . It only edits ; it never authors a new profile YAML. To author a new profile, use the sibling skill . Single output: updated to point at the user's chosen existing profile. When to invoke - The user asks to switch / change / activate a different target platform among profiles that already exist. - A downstream skill refused with "no active target" and already contains one or more profile YAMLs. - The user names a target by filename or product, and that profile YAML is already on disk. If is missi…