/**
 * GatePort is the human-checkpoint seam. After a step produces (and commits)
 * work, an `approval` gate asks the human whether to proceed. The real adapter
 * reads stdin; tests use a fake that returns canned decisions.
 *
 * Declining is a clean halt — the committed work stays on the worktree branch
 * and the pipeline stops. It is signalled with GateDeclinedError so callers can
 * distinguish "the human stopped it" from "the agent errored".
 */
import type { Tier } from "../domain/run-spec.ts";
export type GateMode = "none" | "approval";
export interface GateRequest {
    tier: Tier;
    issue: string;
    stage: string;
    /** The agent result text the human is approving. */
    summary: string;
    /** The commit the step produced, if any. */
    commit?: string;
}
export interface GatePort {
    /** Returns true to proceed, false to halt the pipeline. */
    confirm(request: GateRequest): Promise<boolean>;
}
export declare class GateDeclinedError extends Error {
    readonly issue: string;
    readonly stage: string;
    readonly tier: Tier;
    constructor(issue: string, stage: string, tier: Tier);
}