/** `<project>-<YYYYMMDD>-<HHMMSS>` in local time: the name a session gets when it picks none. */
export declare function defaultAlias(projectPath: string, started: Date): string;
/** Joins as `base`, then `base-2`, `base-3`… while the hub reports the alias as taken. */
export declare function joinWithFreeAlias(base: string, join: (alias: string) => Promise<string>): Promise<string>;
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