Terraform-style operator/project split: ~/.omnigraph/config.yaml for
identity (operator.actor in the --as cascade), credentials keyed by
server name (env -> 0600 credentials file; no inline secrets), and
operator-owned named servers that project configs reference but cannot
redefine. Explicitly a staged subset of RFC-002: adopts its settled
decisions (one dir, keyed credentials, env precedence), defers
GraphLocator/use/state-layer, and encodes the ten confirmed PR #139
findings as design rules (compat shims, key-level merges, atomic writes,
the project-layer trust boundary).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
