/**
 * ProjectIdentity v1（roadmap §5.3）原型：用于 P0 provenance spike。
 */
export type ProjectKind = "git" | "cwd";
export interface ProjectIdentity {
    version: 1;
    kind: ProjectKind;
    normalizedRoot: string;
    projectKey: string;
    unresolved: boolean;
}
/**
 * 规范化路径分隔符与尾部斜杠；Windows 盘符小写。
 */
export declare function normalizeRootPath(input: string): string;
export type PathExistsFn = (candidate: string) => boolean;
/**
 * 向上查找最近 git/worktree root；找不到则用 cwd。
 */
export declare function resolveProjectIdentity(cwd: string, existsSync?: PathExistsFn): ProjectIdentity;
/**
 * 计算 projectKey。
 */
export declare function hashProjectKey(kind: ProjectKind, normalizedRoot: string): string;
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