export interface CausalEvent {
    event_id: string;
    causal_id: string;
    parent_event_id?: string;
    timestamp: number;
    tenant_id: string;
    application_id: string;
    revision_id?: string;
    subject_id: string;
    subject_type: string;
    authorization_decision_id?: string;
    capability?: string;
    resource?: string;
    operation: string;
    workload_id?: string;
    attempt_id?: string;
    worker_id?: string;
    connection_id?: string;
    execution_id?: string;
    state_version?: string;
    operation_ids: string[];
    artifact_ids: string[];
    result_id?: string;
    status: string;
    error_code?: string;
    metadata: Record<string, unknown>;
    schema_version: number;
}
export declare class ObserveClient {
    private baseUrl;
    private fetcher;
    constructor(baseUrl?: string, fetcher?: typeof fetch);
    private json;
    events(applicationId: string): Promise<{
        events: CausalEvent[];
    }>;
    cause(causalId: string): Promise<{
        events: CausalEvent[];
    }>;
    workload(workloadId: string): Promise<{
        events: CausalEvent[];
    }>;
    execution(executionId: string): Promise<{
        events: CausalEvent[];
    }>;
    revision(revisionId: string): Promise<{
        events: CausalEvent[];
    }>;
    append(event: CausalEvent): Promise<CausalEvent>;
}
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