type CodexAuthMode = 'oauth' | 'env-key';
interface PrepareCodexSkillHomeInput {
    stagedRoot: string;
    authMode: CodexAuthMode;
    /** Defaults to $CODEX_HOME or ~/.codex. */
    realCodexHome?: string;
}
/** Arrange the staged root as an ephemeral CODEX_HOME and return its path. */
export declare function prepareCodexSkillHome(input: PrepareCodexSkillHomeInput): Promise<string>;
/** env-key when an explicit API key/env is configured; OAuth otherwise. */
export declare function codexAuthMode(cfg: {
    apiKey?: string;
    apiKeyEnv?: string;
}): CodexAuthMode;
export {};
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