export declare const ALLOWED_GIT_WORKTREE_KEYS: Set<string>;
export declare const ALLOWED_GIT_CLONE_KEYS: Set<string>;
/**
 * Validate `env.git` when present.
 *
 * Set `allowNull` for the contexts where `git: null` carries meaning —
 * experiment variant overrides use it to delete an inherited block. Elsewhere a
 * null is a bare `git:` key with no value, which nothing consumes downstream,
 * so it's reported rather than silently ignored.
 */
export declare function validateEnvironmentGit(env: Record<string, unknown>, context: string, fail: (message: string) => never, options?: {
    allowNull?: boolean;
}): void;
/**
 * Resolve an optional `git.timeout` to milliseconds, or a caller-facing error
 * message keyed by `context` (e.g. `"environment"` at runtime, or a variant
 * context at load time). `undefined` is unset, not an error. Shared between the
 * config loaders (via {@link validateGitTimeout}) and the pipeline's runtime
 * resolver so both reject the same values with the same wording — a `0` (which
 * would disable the timeout) and anything past Node's timer range (which a timer
 * coerces to ~1ms and fires immediately).
 */
export declare function describeGitTimeout(timeout: unknown, context: string): {
    ok: true;
    ms: number;
} | {
    ok: false;
    message: string;
};
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