export declare class CiWorktreeError extends Error {
    readonly exitCode: number;
    constructor(message: string, exitCode?: 1 | 2);
}
/** Parent directory for ephemeral CI worktrees (`RUNNER_TEMP` in Actions, else OS tmp). */
export declare function ciWorktreeScratchParent(): string;
export declare function gitRepoRoot(cwd: string): string;
/** Consumer path relative to the repository root (`.` when already at root). */
export declare function consumerRelativeFromRepoRoot(repoRoot: string, consumerCwd: string): string;
export declare function worktreeRunCwd(worktreePath: string, consumerRel: string): string;
export declare function assertResolvableCommit(sha: string, cwd: string): void;
/** Force the consumer checkout onto `--head` without ever checking out `--base`. */
export declare function ensureConsumerAtHead(repoRoot: string, head: string): void;
export declare class CiProcessExit {
    readonly exitCode: number;
    constructor(exitCode: number);
}
export declare class CiWorktreeSession {
    private readonly repoRoot;
    private readonly scratchParent;
    private readonly worktrees;
    private disposed;
    constructor(repoRoot: string, scratchParent?: string);
    scratchRoot(): string;
    /** Add (or return) a detached worktree at `sha` under the scratch parent. */
    addDetached(sha: string, label: string): string;
    remove(label: string): void;
    dispose(): void;
}