export declare const SUPPORTED_GUIDANCE_CONTRACT_MAJOR = 1;
export type SkillCompatibilityStatus = "compatible" | "compatibility-unknown" | "refused";
export type SkillCompatibilityRefusalCode = "invalid-guidance-metadata" | "unsupported-contract-major" | "unsatisfied-lyt-range";
export type SkillCompatibilityNextActionCode = "update-lyt" | "reconcile-skills";
export interface SkillCompatibilityNextAction {
    code: SkillCompatibilityNextActionCode;
    command: "lyt update" | "lyt skills install";
}
export interface SkillCompatibilityRefusal {
    code: SkillCompatibilityRefusalCode;
    message: string;
    nextAction: SkillCompatibilityNextAction;
}
export interface SkillMetadata {
    skillVersion: string | null;
    requiresLyt: string | null;
    contractVersion: string | null;
    lytVersion: string | null;
    compatibility: SkillCompatibilityStatus;
    refusal: SkillCompatibilityRefusal | null;
}
export type SkillMetadataReader = (skillMdPath: string) => SkillMetadata;
export declare function getInstalledLytVersion(): string;
export declare function readSkillMetadata(skillMdPath: string): SkillMetadata;
export declare function createSkillMetadataReaderForPackageRoot(packageRoot: string): SkillMetadataReader;
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