deep-fusion-beats-plugin-install-for-skill-integration
When integrating external skill repos, absorbing their intelligence into existing skills (Deep Fusion) outperforms installing them as separate plugins. Installing as-is creates skill overlap (two competing design intelligence sources), Law #2 violations (two things mapping to one concept), and context window bloat. The correct pattern: extract non-overlapping intelligence, merge into the appropriate existing skill, and discard the shell.