/**
 * Durable escalation registry (DEC-095, Drumbeat D7). When an agent exhausts its
 * relance budget (DEC-086 `scanDrumbeat` → `exhausted`), the daemon must stop
 * looping and **escalate to the PRINCIPAL** (DEC-084: the engagement owner, not
 * EXECUTIF) over the `alert` channel (DEC-040). The relance cap is the anti-loop
 * guard; this registry is the escalation that replaces further relances.
 *
 * Parallel to the drumbeat/blockage registries: `<root>/.h2a/escalation/<safe-instance>.json`.
 */
/**
 * Why the escalation fired. `relance-exhausted` (D7, relance budget spent);
 * `watchdog-escalate` / `reroute-suggested` (D5, the reflexive watchdog decided
 * a human must look, or that the work should be reassigned).
 */
export type H2AEscalationReason = "relance-exhausted" | "watchdog-escalate" | "reroute-suggested";
export interface H2AEscalationRecord {
    readonly instance: string;
    readonly reason: H2AEscalationReason;
    /** Relance count at the time the budget was exhausted. */
    readonly relanceCount: number;
    /** Escalation channel (DEC-040). Defaults to `alert`. */
    readonly channel: string;
    /** Symbolic target — the scope's competent authority. Defaults to `PRINCIPAL` (DEC-084). */
    readonly to: string;
    readonly at: string;
}
export interface RecordEscalationInput {
    readonly instance: string;
    readonly reason: H2AEscalationReason;
    readonly relanceCount: number;
    readonly channel?: string;
    readonly to?: string;
}
/**
 * Record (upsert) an escalation. Idempotent per instance: a repeated escalation
 * for the same exhausted instance overwrites with the latest count/time rather
 * than piling up — the PRINCIPAL needs one open alert per agent, not a flood.
 */
export declare function recordEscalation(root: string, input: RecordEscalationInput, now?: number): H2AEscalationRecord;
export declare function readEscalation(root: string, instance: string): H2AEscalationRecord | undefined;
export declare function listEscalations(root: string): H2AEscalationRecord[];
/** Clear an escalation — call when the agent is cleanly resumed/finished. */
export declare function clearEscalation(root: string, instance: string): void;
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