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Deterministic Replay Contract (Feed/Tool/Rule Pinning)

Module

__Libraries

Status

VERIFIED

Description

Replay manifests pin feed snapshots, tool versions, rule packs, and scoring inputs with content-addressed hashes. Validation ensures CAS integrity and deterministic sorting.

Implementation Details

  • ReplayManifest: src/__Libraries/StellaOps.Replay.Core/ReplayManifest.cs -- core manifest model with versioning
  • ReplayManifestValidator: src/__Libraries/StellaOps.Replay.Core/ReplayManifestValidator.cs -- multi-partial validation: .Cas.cs (CAS reference integrity), .Graphs.cs (graph reference validation), .Sorting.cs (deterministic sort verification), .Traces.cs (trace reference validation), .Upgrade.cs/.Upgrade.Helpers.cs (manifest version upgrade paths)
  • ReplayManifestVersions: src/__Libraries/StellaOps.Replay.Core/ReplayManifestVersions.cs -- version constants and migration logic
  • CasReference/ICasValidator/InMemoryCasValidator: src/__Libraries/StellaOps.Replay.Core/CasReference.cs, ICasValidator.cs, InMemoryCasValidator.cs -- content-addressed storage validation with CasValidationResult/CasValidationError
  • PolicySimulationInputLock: src/__Libraries/StellaOps.Replay.Core/PolicySimulationInputLock.cs -- pins policy simulation inputs with content-addressed hashes
  • PolicySimulationInputLockValidator: src/__Libraries/StellaOps.Replay.Core/PolicySimulationInputLockValidator.cs -- validates pinned input integrity
  • DeterministicHash: src/__Libraries/StellaOps.Replay.Core/DeterministicHash.cs -- deterministic hash computation for replay verification
  • DeterminismManifestValidator: src/__Libraries/StellaOps.Replay.Core/Validation/DeterminismManifestValidator.cs -- comprehensive multi-partial validation: .Core.cs, .Inputs.cs, .Artifact.cs, .CanonicalHash.cs, .Toolchain.cs, .Verification.cs, .Reproducibility.cs, .Required.cs, .Parse.cs, .Regex.cs
  • ReplayProof: src/__Libraries/StellaOps.Replay.Core/ReplayProof.cs -- .Canonical.cs (canonical serialization), .Factory.cs (proof construction), .Validation.cs (proof verification)
  • FeedSnapshotCoordinatorService: src/__Libraries/StellaOps.Replay.Core/FeedSnapshotCoordinatorService.cs -- feed snapshot management: .Create.cs, .Export.cs, .Import.cs, .Validate.cs, .Digest.cs, .BundleManifest.cs, with Zstd compression streams
  • Tests: src/__Libraries/StellaOps.Replay.Core.Tests/
  • Source: Feature matrix scan

E2E Test Plan

  • Verify replay manifest pins all input hashes (feed, tool, rule, scoring)
  • Test CAS validation detects tampered or missing content-addressed references
  • Verify deterministic sorting produces identical manifest ordering across runs
  • Test manifest version upgrade preserves content integrity
  • Verify PolicySimulationInputLock captures exact policy evaluation parameters
  • Test DeterminismManifestValidator catches non-reproducible manifests
  • Verify ReplayProof canonical serialization produces identical bytes for same inputs
  • Test FeedSnapshotCoordinator export/import round-trip with Zstd compression

Verification

  • Verified: 2026-02-13T20:30:00Z
  • Run: run-001
  • Tier: Tier 2d (Library/Internal)
  • Verdict: PASS