import type { GhWrapper, Issue } from '@generacy-ai/cockpit';
import type { PrLifecycle, PrSnapshot, Snapshot } from './snapshot.js';
export type PrChecksNeededReason = 'no-prev' | 'lifecycle-flip' | 'head-changed' | 'label-changed' | 'safety-cycle' | 'not-terminal' | 'skip-terminal';
export interface PrChecksNeededDecision {
    fetch: boolean;
    reason: PrChecksNeededReason;
}
export interface DerivePrChecksNeededInput {
    prevSnapshot: PrSnapshot | undefined;
    currentLifecycle: PrLifecycle;
    currentLabels: string[];
    currentHeadRefOid: string | undefined;
    cyclesSinceLastCheckFetch: number;
    safetyCycles?: number;
}
export declare function derivePrChecksNeeded(input: DerivePrChecksNeededInput): PrChecksNeededDecision;
export interface DerivePrLifecycleDeps {
    getPullRequest: GhWrapper['getPullRequest'];
}
/**
 * Derive the lifecycle of a PR (`open` | `closed` | `merged`).
 *
 * Plan D5: avoid an extra `gh pr view` call per cycle for stable PRs. Only call
 * `getPullRequest` when:
 *   - the previous snapshot was OPEN (or absent) AND the current issue state is
 *     CLOSED — i.e. the PR just flipped to closed and we don't yet know if it
 *     was merged.
 * Otherwise reuse the prior lifecycle (or default 'open' if no prev).
 */
export declare function derivePrLifecycle(repo: string, prev: Snapshot | undefined, issue: Pick<Issue, 'number' | 'state'>, deps: DerivePrLifecycleDeps): Promise<PrLifecycle>;
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