/**
 * Skill-block parsing and inline skill-command expansion for AgentSession.
 *
 * `parseSkillBlock` recognizes the `<skill …>` envelope embedded in user
 * messages; `expandSkillCommand` turns a `/skill:name args` invocation into that
 * envelope by reading the skill file. Both are pure aside from the file read,
 * which reports failures through the supplied error callback.
 */
import type { Skill } from "./skills.js";
/** Parsed skill block from a user message */
export interface ParsedSkillBlock {
    name: string;
    location: string;
    content: string;
    userMessage: string | undefined;
}
/**
 * Parse a skill block from message text.
 * Returns null if the text doesn't contain a skill block.
 */
export declare function parseSkillBlock(text: string): ParsedSkillBlock | null;
/** Error reported while reading a skill file during expansion. */
export interface SkillExpansionError {
    filePath: string;
    error: string;
}
/**
 * Expand a skill command (`/skill:name args`) to its full skill-block content.
 * Returns the expanded text, or the original text when it is not a skill command
 * or the named skill is unknown. File-read failures are surfaced via `onError`
 * and leave the original text unchanged.
 */
export declare function expandSkillCommand(text: string, skills: Skill[], onError: (err: SkillExpansionError) => void): string;
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