deep-fusion-over-plugin-install-for-skill-upgrades

When integrating external skill repositories, absorbing their intelligence into existing skills (Deep Fusion) is architecturally superior to installing them as separate plugins. Side-by-side installation creates skill overlap (e.g., Impeccable anti-slop vs frontend-taste anti-slop), violating Zero Ambiguity (Law #2) and bloating context windows with competing design intelligence sources. The correct pattern: extract non-overlapping intelligence and merge it into the existing canonical skill.