sop-architectural-primitive-fills-taxonomy-gap
SOPs are a distinct architectural primitive from skills (atomic single capability), topic files (reference knowledge), and feedback files (single rule). SOPs handle chronologically-ordered multi-skill workflows with parameter handoff and operator decision points across external tools — e.g., seedance-loop-prompt → Kie AI → Seedance 2 → website-creator → gh CLI in strict sequence. No existing artifact type could own this orchestration role.