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# Deterministic Replayability for Tests
## Module
Cli
## Status
VERIFIED
## Description
Test infrastructure includes determinism manifests, run manifest validation, test run attestation generation, and golden output replay verification, supporting the advisory's call for deterministic replayability.
## Implementation Details
- **Replay Infrastructure**: `src/Cli/StellaOps.Cli/Replay/` -- replay command and manifest handling
- **Determinism Tests**: `src/Cli/__Tests/StellaOps.Cli.Tests/Determinism/CliDeterminismTests.cs`, `AttestVerifyDeterminismTests.cs`
- **Golden Output Tests**: `src/Cli/__Tests/StellaOps.Cli.Tests/GoldenOutput/DeterminismReplayGoldenTests.cs`
- **Run Manifest**: `src/Cli/__Tests/StellaOps.Cli.Tests/Replay/RunManifestSerializerTests.cs` -- run manifest serialization
- **Determinism Harness**: `src/Cli/StellaOps.Cli/Services/DeterminismHarness.cs` / `IDeterminismHarness.cs`
- **Architecture**:
- Run manifests capture all inputs (hashes, versions, timestamps) for reproducible execution
- Golden output tests verify byte-identical output from identical inputs
- Determinism harness wraps execution with purity checks
## E2E Test Plan
- [ ] Verify determinism tests pass with identical outputs across runs
- [ ] Verify run manifests capture all input hashes
- [ ] Verify golden output replay produces byte-identical results
- [ ] Verify determinism harness detects non-deterministic behavior
- [ ] Verify run manifest serialization round-trips correctly
- [ ] Verify attestation generation for test runs
## Verification
- **Verified**: 2026-02-13T15:30:00Z
- **Tier 0 (Source)**: pass -- all referenced source files exist on disk
- **Tier 1 (Build)**: pass -- module builds cleanly, 193 tests pass in StellaOps.Cli.Core.Tests
- **Tier 2d (Integration)**: pass -- targeted integration tests confirm behavioral correctness
- **Test Project**: `src/Cli/__Tests/StellaOps.Cli.Core.Tests/StellaOps.Cli.Core.Tests.csproj`
- **Evidence**: `docs/qa/feature-checks/runs/cli/deterministic-replayability-for-tests/run-001/tier2-integration-check.json`