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git.stella-ops.org/docs/features/unchecked/cli/replay-button-determinism-as-ux.md

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# Replay Button / Determinism as UX
## Module
Cli
## Status
IMPLEMENTED
## Description
Replay executor with drift tracking, dedicated Replay web service, and determinism golden tests implement the "replay this verdict" capability.
## Implementation Details
- **Command Group**: `src/Cli/StellaOps.Cli/Commands/ReplayCommandGroup.cs` -- `ReplayCommandGroup` for `stella replay` commands
- **Score Replay**: `src/Cli/StellaOps.Cli/Commands/ScoreReplayCommandGroup.cs` -- score replay operations
- **Replay Infrastructure**: `src/Cli/StellaOps.Cli/Replay/` -- replay execution infrastructure
- **Tests**: `src/Cli/__Tests/StellaOps.Cli.Tests/GoldenOutput/DeterminismReplayGoldenTests.cs`
- **Commands**:
- `stella replay run <digest>` -- replay a verdict evaluation
- `stella replay verify <digest>` -- verify replay matches original verdict
- `stella replay drift <digest>` -- check for drift between original and replayed verdict
## E2E Test Plan
- [ ] Run `stella replay run sha256:abc123` and verify verdict replayed
- [ ] Run `stella replay verify sha256:abc123` and verify replay matches original
- [ ] Run `stella replay drift sha256:abc123` and verify drift detection
- [ ] Verify deterministic output (byte-identical across replays)
- [ ] Verify golden output tests pass