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- lib/common.sh: add require_local_os, require_remote_os, require_remote_pkg_manager - setup/macbook.sh: require macOS (Darwin) - setup/unraid.sh: require remote is Linux - setup/fedora.sh: require remote is Linux + has dnf (RPM-based) - manage_runner.sh: native runner add/remove requires macOS - run_all.sh: control plane must be macOS - preflight.sh: 3 new checks (1: local=macOS, 2: Unraid=Linux, 3: Fedora=Linux+dnf) - phase5_migrate_pipelines.sh: fix sed -i to be portable (no macOS-only syntax) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>