/** Slack credentials needed to post into a channel. */
export type SlackConfig = {
    /** Bot token with the chat:write scope. */
    token: string;
    /** Channel ID (e.g. C0XXXXXXX) the bot is a member of. */
    channel: string;
};
/** A message to post: the text, and an optional thread to reply into. */
export type SlackMessage = {
    text: string;
    /** When set, the message is posted as a reply in this thread instead of a new root message. */
    threadTs?: string;
};
/**
 * Posts a message with chat.postMessage and returns its `ts` (timestamp id), which can be passed
 * back as `threadTs` to reply in the same thread. Throws when Slack reports a failure.
 */
export declare function postSlackMessage(config: SlackConfig, message: SlackMessage): Promise<string>;
/** Either ready-to-use Slack credentials, or a reason they are unavailable so the caller can skip. */
export type SlackConfigResolution = {
    config: SlackConfig;
} | {
    unavailable: string;
};
/**
 * Resolves the Slack bot token and channel id, preferring environment overrides and falling back to
 * 1Password. Returns `{ unavailable }` (rather than throwing) when either is missing, so a release
 * can still be published without an announcement.
 */
export declare function resolveSlackConfig(): Promise<SlackConfigResolution>;
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