{
  "schema_version": "2",
  "scenario_id": "invalid-scenario",
  "purpose": "This fixture intentionally contains an unknown field.",
  "non_goals": ["production use"],
  "assets": [{"id": "demo", "classification": "internal"}],
  "trust_boundaries": [{"id": "demo-boundary", "from": "a", "to": "b", "data_assets": ["demo"]}],
  "untrusted_sources": [{"id": "input", "type": "text", "trust_level": "untrusted"}],
  "identities": [{"id": "demo-id", "shared": false, "ttl_minutes": 5, "scopes": ["demo.read"]}],
  "tools": [{"name": "demo_read", "mode": "read", "destination_class": "internal", "endpoint": "demo-api", "resources": ["demo:self"], "side_effect": false, "required_for_purpose": true, "required_scopes": ["demo.read"], "identity_id": "demo-id", "egress_assets": []}],
  "dependencies": [{"name": "demo", "version": "1.0.0", "artifact_digest": "sha256:bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb", "provenance_verified": true}],
  "memory": {"enabled": false, "write_sources": [], "write_assets": []},
  "controls": {
    "treat_external_content_as_data": true,
    "tool_allowlist": ["demo_read"],
    "endpoint_allowlist": ["demo-api"],
    "resource_allowlist": ["demo:self"],
    "approval": {"required_for_tools": [], "binds_parameters": false, "expires_minutes": 5},
    "sandbox": {"enabled": true, "network_default_deny": true},
    "output_validation": true,
    "data_egress_validation": false,
    "memory_write_validation": false,
    "audit_logging": true,
    "rate_limit": true,
    "emergency_disable": true
  },
  "risk_policy": {"block_severities": ["critical", "high"], "review_severities": ["medium"], "accept_severities": ["low"]},
  "unexpected_field": true
}