| Local mock provider | Supported | Development only | go test ./... or CI pass | No sandbox isolation; not a production runtime. |
| Single-node Docker/runc | Supported | Technical production with hardened config | stacyvm config lint --production, stacyvm doctor --production, support bundle | Isolation is container-based; operators must keep Docker, kernel, and seccomp policy patched. |
| Single-node Docker with gVisor | Host-certified | Recommended container hardening path | Runtime certification report for gvisor | Requires host runtime installation and Docker runtime wiring outside StacyVM. |
| Single-node Docker with Kata | Host-certified | VM-backed container path | Runtime certification report for kata | Requires host runtime installation, VM support, and capacity planning. |
| Firecracker | Host-certified | VM isolation path for Linux/KVM hosts | Runtime certification report for firecracker | Requires Linux, KVM, kernel/rootfs/agent assets, and host networking setup. |
| PRoot | Experimental | Development and restricted hosts only | Runtime certification report for proot if used | Not a VM or container isolation boundary; production use is not recommended. |
| E2B/custom provider | Preview | Integration-specific | Provider health, conformance results, and provider-specific logs | External provider availability, auth, and isolation guarantees are outside StacyVM’s direct control. |
| Multi-worker cluster | Preview | Enterprise self-serve with OIDC + tenant model | Cluster conformance output, Postgres contract output, worker identity certification report, runtime certification for every worker runtime, OIDC provider configuration, and tenant policy review | Worker registry, placement, leases, Postgres store path, signed worker identity, centralized token issuance, worker RPC routing, mTLS wiring, OIDC/JWT RS256 auth, RBAC roles (viewer/operator/admin/tenant_admin), tenant model, policy controls, and per-tenant audit export are implemented. Remaining: target-network mTLS smoke with deployment-issued certificates for specific enterprise networks. |