/**
 * Renderer for `generator-diff` artifacts.
 *
 * Shows: git diff --stat of the sprint's commits, list of files changed
 * (created/modified/deleted), commit count, and per-file diff (truncated
 * at 50 lines per file). Skips binary files (lists but does not render inline).
 *
 * This is the ONLY renderer allowed to shell out (to git).
 * All git calls go through the GitClient interface for testability.
 *
 * Exports two functions:
 *   - `renderGeneratorDiff(artifact)` — SYNC, no git I/O, uses filesChanged list only.
 *     Used by the registry dispatch (sync constraint).
 *   - `renderGeneratorDiffAsync(artifact, git?)` — ASYNC, full git diff.
 *     May be called directly by mechanisms that can await.
 *
 * Sprint 11 — colocated in renderers/ per mechanisms/ precedent.
 */
/** Mockable seam for git operations — mirrors GhClient pattern in pr.ts. */
export interface GitClient {
    diffStat(base: string, head: string, cwd: string): Promise<string>;
    diffNumstat(base: string, head: string, cwd: string): Promise<Array<{
        added: string;
        deleted: string;
        path: string;
    }>>;
    diffFile(filePath: string, base: string, head: string, cwd: string): Promise<string>;
    revListCount(base: string, head: string, cwd: string): Promise<number>;
}
/** Default GitClient implementation — wraps execa. */
export declare function createGitClient(): GitClient;
/**
 * Render a `generator-diff` artifact as markdown (SYNC version).
 *
 * Only uses the `filesChanged` list from the artifact — no git I/O.
 * This is what the registry dispatch calls (sync constraint).
 */
export declare function renderGeneratorDiff(artifact: unknown): string;
/**
 * Render a `generator-diff` artifact as markdown (ASYNC version with git I/O).
 *
 * When baseRef/headRef are available, shells out to git for stat and per-file diffs.
 * Falls back to showing just the filesChanged list when refs are unavailable.
 *
 * @param artifact - The generator-diff artifact.
 * @param git      - Injectable GitClient (default: createGitClient()).
 */
export declare function renderGeneratorDiffAsync(artifact: unknown, git?: GitClient): Promise<string>;
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