/**
 * GitPort is the seam for git operations on isolated worktrees. The real
 * implementation shells out to git CLI; tests use a fake ProcessRunner.
 */
/**
 * Thrown by commit() when there is nothing staged to commit. This is a distinct
 * type (not a generic Error) so callers can distinguish "the worker produced no
 * new changes" — a recoverable, defer-to-verifier condition — from a real git
 * failure. A stage whose scope an earlier stage already satisfied legitimately
 * has nothing new to commit; that must not abort the whole pipeline.
 */
export declare class NoChangesToCommitError extends Error {
    readonly worktree: string;
    constructor(worktree: string);
}
export interface GitPort {
    /** Create an isolated worktree at <repoRoot>/.worktrees/<issue> on a new branch (default diablo/<issue>, or the given branch), cut from baseBranch. Returns the absolute worktree path. */
    worktreeAdd(issue: string, baseBranch: string, branch?: string): Promise<string>;
    /** Stage all changes in the worktree and commit with the given message. Returns the resulting commit SHA (full 40-char). */
    commit(worktree: string, message: string): Promise<string>;
    /** Return the current HEAD SHA (full) of the worktree. */
    headSha(worktree: string): Promise<string>;
    /** Return `git diff --stat` output for the worktree against baseBranch. */
    diffStat(worktree: string, baseBranch: string): Promise<string>;
    /** Return the file paths changed by a single commit (handles root commits). */
    committedFiles(worktree: string, sha: string): Promise<string[]>;
}