observability-and-instrumentation, deprecation-and-migration, ci-cd-and-automation from addyosmani/agent-skills 2686b620, curl'd into skills-external/<name>/ by install-plugins.sh Step 8e (tmp+mv), refreshed by update-all.sh 7.3, symlinked by link.sh, registered in toggle-external, profile.sh and the full/backend/dev profiles. Pin read from the lock via argv, never hardcoded. Case 2 of the 6-repo review, BDR-102.