* fix(skills): skill scripts run when the skills dir is a symlink
* test(skills): plugin launcher fixture ships the shared main-module helper like an install
* fix(skills): the CLI's cube validator runs through a symlink too, and the guard check is stricter
* docs(skills): long agent-started renders run detached in their own process group
* docs(cli): detached renders start in their own process group, on macOS too
* docs(cli): the detached render recipe never waits on terminal input
