docs(rfc): add Policy subsystem (RFC 0005)#1728
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Proposes a Policy subsystem on the gateway that delegates where policy comes from to a driver: a first-party builtin driver (the default, in-process store-backed path) or a third-party driver over a PolicyDriver gRPC contract. Third-party drivers follow the out-of-tree model — operator-run, with the gateway connecting to a provided UDS. The change is additive and opt-in per deployment. Signed-off-by: Divya Vavili <dvavili@nvidia.com>
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Summary
Proposes RFC 0005 — Policy Subsystem: promote policy to a first-class gateway subsystem that delegates where policy comes from to a driver, mirroring the subsystem-and-driver model RFC 0001 defines for the gateway (and implements today for compute).
builtindriver (the default) — today's in-process, store-backed policy path, unchanged.PolicyDrivergRPC contract and runs as an operator-managed process the gateway connects to over a UDS. The gateway does not launch or supervise it.The change is additive and opt-in per deployment. Enforcement stays the gateway's: projections are verified against a trust store (authentic), admitted all-or-nothing (complete), and gated against mutation (unaltered). A driver's internals — packaging, policy sourcing, remote backends, trust establishment — are out of scope; OpenShell consumes only the projected
SandboxPolicy.Scoping issue: #1713. Related: RFC 0001, RFC 0002, #1703.
DCO: the commit is signed off.