/**
 * A merged PR that `hula revert` can undo.
 */
export interface ResolvedTarget {
    /** `pr` when resolved through a merged PR; `commit` for a bare SHA revert. */
    kind: "pr" | "commit";
    /** Merged PR number, or null for a bare-commit revert with no associated PR. */
    prNumber: number | null;
    /** Title used for the `Revert "<title>"` PR. */
    prTitle: string;
    /** Original PR URL (null for a bare-commit revert). */
    prUrl: string | null;
    /** Base branch to open the revert PR into. */
    baseBranch: string;
    /** The (usually deleted) feature/head branch, so it can be recreated. */
    headBranch: string | null;
    /** Original PR head SHA, used to recreate the deleted branch. */
    headSha: string | null;
    /** Issue the original PR closed (reopened after the revert), or null. */
    closedIssueNumber: number | null;
    /**
     * For a bare-commit target (a SHA with no associated merged PR): the exact
     * commit to revert. Null for the PR path, where the merge shape is resolved
     * via {@link PRService.getMergeInfo}.
     */
    directCommitSha: string | null;
}
/** One candidate when a branch name maps to several merged PRs. */
export interface TargetCandidate {
    prNumber: number;
    title: string;
    mergedAt: string | null;
    url: string;
    headRef: string;
}
export type ResolveResult = {
    status: "resolved";
    target: ResolvedTarget;
} | {
    status: "ambiguous";
    candidates: TargetCandidate[];
} | {
    status: "error";
    message: string;
};
/**
 * Detect the repository's default branch via `gh`, falling back to `main`.
 * The result is guarded against shell-unsafe names by the caller before use.
 */
export declare function detectDefaultBranch(): Promise<string>;
/**
 * Classify a `<target>` string into its kind + extracted value.
 * Exported for unit testing of the detection logic.
 */
export declare function detectTargetKind(target: string): {
    kind: "pr";
    prNumber: number;
} | {
    kind: "sha";
    sha: string;
} | {
    kind: "branch";
    branch: string;
};
/**
 * Resolve a `<target>` (branch name, PR number/URL, or commit SHA) to the
 * merged PR (or bare commit) that `hula revert` should undo.
 *
 * @param target - The user-supplied target string.
 * @param opts.pr - Explicit PR number to disambiguate a reused branch name.
 * @param opts.defaultBranch - Default branch, used as the base for a bare-commit revert.
 */
export declare function resolveTarget(target: string, opts?: {
    pr?: number;
    defaultBranch?: string;
}): Promise<ResolveResult>;
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