Structure only, no deploy path: DESIGN.md decision registry (phasing,
per-instance adapter, bidirectional sync with drift-abort on deploy,
reload-vs-restart gating, token handling), instances.yaml (ken/piha via
docker-exec, chelsty-ha via api), config/storage-export/fixtures dirs,
and a read-only scripts/ha/import.sh (docker-exec adapter only) with a
canonical YAML normalize+split library and an offline determinism test.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
