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npub1jmc9dt2lyvzu3h0kxlwxt5zg4fxp9476awyxw6gwxn72g6cw7exqs64whmandTyler Longwell
e1b090e48e
Adds `crates/buzz-conformance/` — the substrate for runtime formal-spec
conformance. It is the **independent oracle** for the multi-tenant relay:
given a trace of seam events recorded by the relay at runtime, the
checker asserts they obey `docs/spec/MultiTenantRelay.tla`. Production
binaries pay zero cost (the relay defaults to `NoopTracer`); test/staging
runs against `JsonlTracer` and the checker re-runs every captured trace.
Crate contents:
- `src/lib.rs` — schema: `TraceStep`, `TraceAction` (8 spec actions +
`ImplBug` for coverage-breach), `AbstractState` (resolved_community,
bound_host, actor), the `Tracer` trait, `NoopTracer` for prod.
- `src/transitions.rs` — re-implementation of the spec's `Next` relation
in Rust, used by the checker. Owned by this crate, not pulled from the
relay — that's what makes the oracle independent.
- `src/checker.rs` — replay engine: `check_trace` returns
`Err(IllegalTransition | StateMismatch | NonInterference | CoverageBreach)`
on any departure from the spec. 9 unit tests covering each failure mode
plus the M2/M8 (`claimed != resolved`) and NI/ReadConfinement bites.
- `tests/replay_fixtures.rs` + `tests/fixtures/*.jsonl` — five tests that
reconstruct three on-disk JSONL fixtures from typed Rust, assert the
committed file matches byte-for-byte (any schema change requires
`BUZZ_CONFORMANCE_UPDATE=1` to refresh), then replay each through
`check_trace`:
- `good.jsonl` → `Ok(())`
- `bad_host_channel_mismatch.jsonl` → `IllegalTransition`
- `bad_coverage_breach.jsonl` → `CoverageBreach`
- `TRACE_SCHEMA.md` — grounds every action in its `MultiTenantRelay.tla`
line and calls out the three load-bearing projection rules.
- `LIMITS.md` — honestly describes what a green run does/doesn't prove,
and the CI command listing the test surfaces.
Production-fence discipline: deps are exactly `serde / serde_json /
thiserror / uuid`. Zero `buzz-*` production crates. `CommunityLabel(Uuid)`
is a newtype in this crate, NOT `buzz_core::CommunityId` — the checker
physically cannot inherit a production bug because it shares no code
with the relay.
Verify discipline:
- `cargo test -p buzz-conformance --lib` → 9/9
- `cargo test -p buzz-conformance --test replay_fixtures` → 5/5
- Mutate→red→restore proven three times (in earlier session): row-label
corruption → `NonInterference` fires; trace `claimed = resolved` →
`IllegalTransition` vanishes; counter threshold loosened →
`ImplBug` doesn't fire.
This commit lands the substrate only. The relay-side glue
(`crates/buzz-relay/src/conformance/{mod,tracers}.rs`, `AppState.tracer`,
`EmitGuard`) and the ingest-seam emitter follow on the next branch
(`quinn/conformance-relay-glue`). The req.rs read-seam emitters land
after.
Co-authored-by: Tyler Longwell <tlongwell@block.xyz>
Signed-off-by: Tyler Longwell <tlongwell@block.xyz>