sequenceDiagram
    %% Time Travel Debugging

    participant H as Human Supervisor
    participant E as Episteme

    H->>E: Current state?
    Note right of E: Shows RS256 (post-fix). Useless for debugging.

    H->>E: What did we believe at 9pm?
    Note right of E: Time-travel query.

    E-->>H: ES256 (at 9pm)
    Note right of H: ⚠️ Found it. This was the state at incident time.

    E-->>H: Diff: RFC added at 2:30pm
    Note right of H: ✓ Clear timeline of what changed and when.