export declare const CONFIG_FILENAME = ".agentlint.json";
export interface AgentlintConfig {
    projectId: string;
    orgSlug: string | null;
    repoOwner: string | null;
    repoName: string | null;
    prodBranch: string;
    version: number;
}
export type ReadFileFn = (path: string) => Promise<string>;
export type ExistsFn = (path: string) => Promise<boolean>;
export interface LoadConfigOptions {
    readFileFn?: ReadFileFn;
    existsFn?: ExistsFn;
    /** Override the filesystem root used as a walk-up stop condition. */
    rootStop?: string;
}
/**
 * Walk up from `startDir` looking for `.agentlint.json`. Returns the
 * resolved absolute path of the first match, or null when none is found.
 *
 * Stops at the filesystem root (`dirname(x) === x`) or at `rootStop` if
 * provided. Never throws.
 */
export declare function findConfigFile(startDir: string, opts?: LoadConfigOptions): Promise<string | null>;
/**
 * Load and validate `.agentlint.json` starting from `startDir`. Returns null
 * when the file isn't found, isn't valid JSON, or is missing the required
 * `projectId` field.
 */
export declare function loadConfig(startDir: string, opts?: LoadConfigOptions): Promise<AgentlintConfig | null>;
/**
 * Validate the parsed JSON shape into an `AgentlintConfig`. Missing optional
 * fields are normalized to defaults; an absent or non-string `projectId`
 * fails validation by returning null.
 */
export declare function normalizeConfig(parsed: unknown): AgentlintConfig | null;
/**
 * Serialize a config to the canonical on-disk JSON format: 2-space indent +
 * a trailing newline. Centralized so `init` and any future writers agree.
 */
export declare function stringifyConfig(config: AgentlintConfig): string;
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