# SPRINT 1 — SIR Core

## Цель

Создать `packages/sir`.

## Files

- `enums.py`
- `source_ref.py`
- `lineage.py`
- `nodes.py`
- `edges.py`
- `diagnostics.py`
- `references.py`
- `snapshot.py`
- `delta.py`
- `validation.py`
- `serialization.py`
- `hashing.py`

## DoD

```bash
pytest packages/sir/tests
```

Должно проходить:

- snapshot validation ok;
- dangling edge detected;
- serialization roundtrip;
- snapshot hash deterministic;
- diagnostics/unresolved references serializable.