/**
 * DEC-092 — EVO-3 agent-blockage feedback loop. A **blockage** is the third
 * coordination signal: the drumbeat stall is silent (→ relance, DEC-084),
 * escalation targets the competent authority (DEC-040), and a blockage is
 * broadcast to **peer agents** as an FYI / help request. `workStatus: "blocked"`
 * is already a non-stall the drumbeat skips (DEC-085); this turns it into an
 * actionable, peer-visible signal.
 *
 * Pure core: the type, an `isActiveBlockage` predicate, and a builder for a
 * signed-able envelope (parity with the NHI attestation, DEC-088) so a blockage
 * can be signed/journalled. The durable registry, notification and per-host
 * delivery live in `@sentropic/h2a`.
 */
import type { H2AEnvelope, H2ARole } from "./types.js";
export interface H2ABlockage {
    readonly instance: string;
    readonly scope: string;
    /** What the agent is blocked on. */
    readonly reason: string;
    /** What would unblock it (optional, helps a peer act). */
    readonly needs?: string;
    readonly raisedAt: string;
    /** Set when the blockage is cleared. */
    readonly resolvedAt?: string;
    readonly resolvedBy?: string;
}
/** A blockage is active until it is resolved. */
export declare function isActiveBlockage(blockage: H2ABlockage): boolean;
export declare const H2A_BLOCKAGE_BODY_KIND = "blockage";
export declare const H2A_BLOCKAGE_CLEARED_BODY_KIND = "blockage-cleared";
export interface H2ABlockageBody {
    readonly kind: typeof H2A_BLOCKAGE_BODY_KIND | typeof H2A_BLOCKAGE_CLEARED_BODY_KIND;
    readonly blockage: H2ABlockage;
}
/**
 * Build the canonical *unsigned* envelope carrying a blockage (or its clear).
 * No new artifact kind — a plain `event` envelope, so a recipient verifies it
 * with the standard `verifyEnvelopeSignature`. The caller signs it.
 */
export declare function blockageEnvelope(input: {
    readonly blockage: H2ABlockage;
    readonly actor: {
        readonly instance: string;
        readonly role: H2ARole;
        readonly scope: string;
    };
    readonly cleared?: boolean;
    readonly createdAt?: string;
}): H2AEnvelope<H2ABlockageBody>;
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