# Reproducibility Capsule

**Author:** Ciprian Ștefan Pleșca  
**Status:** Repeatable reference procedure for CIGP v0.1

The capsule gives an independent reviewer a compact route from source code to an observed verification result. It is a research procedure, not a production deployment guide.

```mermaid
flowchart LR
    A[Clone revision] --> B[Run workspace tests]
    B --> C[Verify valid fixture]
    C --> D[Verify tampered fixture]
    D --> E[Generate demo ledger]
    E --> F[Verify ledger and proofs]
    F --> G[Record result and environment]
```

Expected result: the valid fixture returns `VALID`; the deliberate tamper fixture returns `INVALID`; a generated JSONL ledger passes hash-chain and proof verification. Descriptive statistics are intentionally not a fairness certificate.

```bash
cargo test --workspace
cargo run -p cigp -- verify test-vectors/demo-round.json
cargo run -p cigp -- verify test-vectors/tampered-round.json
```

The full [Reproducibility Capsule](https://github.com/Ciprian-LocalPulse/CIGP-Protocol/blob/main/docs/academic/reproducibility-capsule.md) records inputs, expected observations, failure interpretation, and research-record requirements.