# PART 2: Existing subsystems to reuse instead of building be… (1)

Checks 1 to 4 of 10, each with its evidence

## What you can do here

- **Verify 1: Accountable agent identity (G1) | Keycloak…**: Verify: Accountable agent identity (G1) | Keycloak or Ory Hydra (OAuth/OIDC),…
- **Verify 2: Scoped mandates and limits (G2, G3) | OpenF…**: Verify: Scoped mandates and limits (G2, G3) | OpenFGA (relationships) + Cedar…
- **Verify 3: Revocation (G4) | Token expiry (OAuth), FGA…**: Verify: Revocation (G4) | Token expiry (OAuth), FGA tuple deletion | Instant…
- **Verify 4: Rehearsal (G5) | TigerBeetle pending transf…**: Verify: Rehearsal (G5) | TigerBeetle pending transfers; Temporal workflows ru…
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- **Open Meet the research: 3. Suggested reuse st**