design-15 S7a: read-only sing-box stats collector (ADR-004)#6
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ADR-004 slice: the new singbox-stats collector queries the core's experimental V2Ray Stats API over loopback gRPC (LATTICE_SINGBOX_STATS_API, off by default) with substring patterns and never resets counters — the server keeps monotonic successive-snapshot diffing. stats.proto is the upstream definition byte-identical except go_package, with generation pinned to development time and a regen note in singboxstats/README.md. Counter names flow through unchanged (design-15 §5 u_<hash> users); the server reverses them into (user, line) pairs. Collector config joins the single-source exclusivity validation and the collector-health error reporting exactly like the xray-cli source.
Report the configured stats endpoint in runtime telemetry, pin the vendored protocol to a verified upstream commit, and publish this slice only as an alpha artifact built against the SDK declared in go.mod. Constraint: The sing-box experimental API is loopback-only and its wire contract is vendored. Rejected: Test only against generated local stubs | that cannot detect drift from upstream sing-box. Confidence: high Scope-risk: moderate Reversibility: clean Directive: Run check-singbox-stats-proto.sh before changing the vendored proto pin. Tested: go test ./...; go vet ./...; release workflow checker; upstream proto byte comparison; proxyusage race tests Not-tested: Live gRPC query against HK sing-box, deferred to canary
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Summary
singbox-statscollector: read-onlyQueryStats(substringuser>>>, neverreset) against the core's experimental V2Ray Stats API over loopback gRPC (LATTICE_SINGBOX_STATS_API, off by default). Server keeps monotonic diffing exactly like the xray-cli source.internal/proxyusage/singboxstats/stats.protois the upstream definition (byte-identical service/messages, onlygo_packageadjusted) + generated code, regen pinned to development time (README with the one-liner). New deps:google.golang.org/grpc+protobuf(pure Go, per ADR-004, design-15: line_uuid, per-line users, chain recognition, Sub-Store integration lattice#2).u_<hash>) for server-side reversal into (user, line).Verification
gofmt/go vetclean;go test ./...all ok (-count=1)Refs LatticeNet/lattice#2 (ADR-004), #5.