BrowserRuntimeOptions

BrowserRuntimeOptions = BrowserRuntimeOptionsBase & { exportedConfig?: ConfigArtifact; playbook: ConfigArtifact; } | { exportedConfig: ConfigArtifact; playbook?: ConfigArtifact; }

Options for BrowserRuntime.

Exactly one of playbook (canonical) or exportedConfig (deprecated) is required — the union keeps that a compile-time requirement, exactly as the single required exportedConfig property did before the rename (BL-0156).