# Replay Module Charter

## Mission
- Capture and verify deterministic replay manifests and tokens for audit reproducibility.

## Responsibilities
- Maintain replay manifest schemas, hashing, and validation.
- Provide WebService APIs for token issuance and verification.
- Ensure content-addressed references to inputs and outputs.
- Keep replay logs and storage deterministic and auditable.

## Required Reading
- docs/README.md
- docs/07_HIGH_LEVEL_ARCHITECTURE.md
- docs/modules/platform/architecture-overview.md
- docs/modules/replay/architecture.md
- docs/modules/replay/replay-proof-schema.md

## Working Agreement
- Use TimeProvider and IGuidGenerator for timestamps and ids.
- UTC ISO-8601 timestamps with invariant formatting.
- Hash inputs with canonical JSON and shared hash helpers.
- No network calls in core logic; all external access via injected clients.
- Propagate CancellationToken.

## Testing Strategy
- Unit tests for manifest validation and hash determinism.
- Integration tests for WebService endpoints and token flows.
- Replay tests verifying identical inputs yield identical outputs.