/**
 * Secure on-disk store for subscription OAuth credentials (Claude Pro/Max,
 * ChatGPT Plus/Pro). Replaces the VSCode SecretStorage the reference flow used
 * with a `chmod 600` JSON file under `.dql/`, mirroring how `provider-settings.json`
 * already guards API keys. Tokens never leave the machine.
 */
export interface ClaudeOAuthCredentials {
    type: 'claude';
    access_token: string;
    refresh_token: string;
    /** ISO-8601 expiry timestamp. */
    expired: string;
    email?: string;
}
export interface CodexOAuthCredentials {
    type: 'openai-codex';
    access_token: string;
    refresh_token: string;
    /** Expiry as a Unix epoch in milliseconds. */
    expires: number;
    email?: string;
    accountId?: string;
}
export type OAuthProviderKey = 'claude' | 'codex';
export declare function oauthCredentialsPath(projectRoot: string): string;
export declare function getClaudeCredentials(projectRoot: string): ClaudeOAuthCredentials | null;
export declare function setClaudeCredentials(projectRoot: string, creds: ClaudeOAuthCredentials): void;
export declare function getCodexCredentials(projectRoot: string): CodexOAuthCredentials | null;
export declare function setCodexCredentials(projectRoot: string, creds: CodexOAuthCredentials): void;
export declare function clearOAuthProvider(projectRoot: string, key: OAuthProviderKey): void;
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