J5ik2o ddd domain primitives and always valid
Skill j5ik2o/ai-tools/plugins/software-design/skills/j5ik2o-ddd-domain-primitives-and-always-valid
npx -y skills add j5ik2o/ai-tools --skill j5ik2o-ddd-domain-primitives-and-always-validAssembled from the repository path, not quoted from the project. Check it against their README if it does not work.