# Downgrade Adapters (SC4)
- Location for mapping CSVs converting CVSS v4→v3.1, CDX 1.7→1.6, SLSA 1.2→1.0.
- Each CSV must include BLAKE3 and SHA256 hash recorded in accompanying `hashes.txt`.
- Adapters are pure (no network); determinism enforced in CI.
- Files added:
  - `mapping-cvss4-to-cvss3.csv`
  - `mapping-slsa12-to-slsa10.csv`
  - `mapping-cdx17-to-cdx16.csv` (placeholder empty; fill once downgrade rules freeze).