Capture the design work for the NixOS migration before any implementation:
- .claude/CONTEXT.md: domain glossary (Host, Module, Skeleton, Auto-loader,
Enable convention, unstable/stable overlay)
- .claude/adr/0001-sops-nix-for-secrets.md: secrets tooling decision
- .claude/spec/laptop-mvi.md: frozen minimum-viable-install spec for neogaia
- reference/: read-only snapshot of the current CachyOS configs (secrets and
state excluded), plus ENVIRONMENT.md profiling the live environment to guide
replication
