/**
 * The parts of the mention model that are pure strings and offsets — no
 * ProseMirror. Kept in its own module so `PromptInput`'s root, its textarea and
 * the mention registry can share the vocabulary without pulling the editor
 * engine into their module graph.
 */
/** Attributes carried by a mention node. All of them survive serialization. */
export interface MentionAttrs {
    id: string;
    label: string;
    /** Entity kind — `"project"`, `"user"`, … */
    type: string;
    /** The character that opened the menu this mention was picked from. */
    trigger: string;
}
/**
 * A mention as it appears in a value change or a submitted message. Offsets
 * index into the derived plain text.
 */
export interface EditorMention extends MentionAttrs {
    start: number;
    end: number;
}
/** Cache key for the item store that backs a chip's icon, trailing and data. */
export declare function mentionKey(trigger: string, type: string, id: string): string;
export declare function isTriggerCharacter(char: string): boolean;
/** Serializes one mention — `@[label](type:id)`. */
export declare function serializeMention(attrs: MentionAttrs): string;
/**
 * Drops whitespace at the document edges — including the space auto-inserted
 * after a chip — while leaving mentions alone, then re-bases the offsets. A
 * chip is never at an edge in the whitespace sense, so trimming can only ever
 * remove text.
 */
export declare function trimDetails<T extends {
    markup: string;
    text: string;
    mentions: EditorMention[];
}>(details: T): T;
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