model: line_uuid + downstream_line_uuid on SingBoxNode (design-15) - #7
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Spec §9.3 binds a host-risk approval to the exact code and inputs that produced its plan: plugin id, version, artifact digest, service, method, request hash, and the full target set. The server had somewhere for only two of those — Plugin and a singular NodeID — so the rest had to be smuggled into the free-form Plan string and recovered by hashing it. Give them real columns. Each is compared to live state at execute time and each is what the operator's review is accountable for, so each should be a typed field, not a value parsed back out of a blob. ApprovalView carries them too, so a reviewer sees what will actually run — which plugin version, which artifact, which nodes. Every field is omitempty and additive: an approval that is not a plugin operation (nft, dns, agent update) serializes exactly as before, and NodeID stays the first target so the per-node approval machinery is unchanged. Tests: model build + proto contract test green.
Design-15 D1/D4/D6: the agent reads the sing-box sidecar metadata (lattice.singbox-metadata.v2) and reports the control-plane line identity plus declared chain edge per inbound. Both fields are omitempty so older agents and servers interoperate unchanged.
This was referenced Jul 18, 2026
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Summary
SingBoxNode.LineUUID— control-plane line identity (design-15 D1), sourced from the sidecarlattice.singbox-metadata.v2SingBoxNode.DownstreamLineUUID— declared chain edge target (design-15 §6)Both
omitempty: old agents/servers interoperate unchanged; JSON-only contract (no proto mirror for SingBox types).Verification
gofmtclean,go vet ./...clean,go test ./...okConsumers (server/agent) pin this branch as a Go pseudo-version until merge. Refs LatticeNet/lattice#2.