/** Bounded execution evidence for agent_health. Registry records are not processes. */
export interface AgentExecutionSample {
    at: string;
    success: boolean;
    durationMs: number;
}
export declare const AGENT_HEALTH_WINDOW = 20;
export declare function appendAgentExecution(value: unknown, sample: AgentExecutionSample): AgentExecutionSample[];
export declare function summarizeAgentExecutions(value: unknown): {
    health: number | null;
    errorRate: number | null;
    sampleCount: number;
    successes: number;
    failures: number;
    latency: {
        avg: number | null;
        p50: number | null;
        p95: number | null;
        p99: number | null;
    };
};
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