## ADDED Requirements

### Requirement: MVP demo SHALL provide stable evidence-pipeline scenarios
The MVP demo SHALL provide stable scenarios that explain how to demonstrate positive evidence, no-evidence, and safety/reject behavior for an Agent engineering interview.

#### Scenario: Scenario guide maps demo inputs to evidence claims
- **WHEN** a reviewer opens the demo scenario guide
- **THEN** it SHALL list the supported positive, no-evidence, and safety/reject scenarios
- **AND** it SHALL map each scenario to a request payload or fixture id
- **AND** it SHALL describe the expected Gatekeeper, Verifier, Composer, and trace fields to inspect

#### Scenario: Live and fixture-backed scenarios are distinguished
- **WHEN** a demo scenario is fixture-backed rather than live-scripted
- **THEN** the documentation SHALL say so explicitly
- **AND** it SHALL avoid promising deterministic live LLM output for that scenario