/**
 * Skills installation functions.
 * Delegates installation to CAAMP's gated install pipeline.
 *
 * @epic T4454
 * @task T4521
 * @task T12383
 * @task T12384
 */
/**
 * Install a single skill from the registered skill library via CAAMP.
 *
 * @remarks
 * Goes through `installSkillFromSource`, which resolves `library:<name>` to
 * the library's directory (or refuses), runs the fail-closed security gate,
 * and stages the new copy before replacing an installed one. Before T12383
 * this passed `library:<name>` to the copier as a path, which deleted the
 * installed skill and then failed.
 *
 * @param skillName - Name of a skill in the registered library
 * @param projectDir - Project directory for project-scoped provider links
 * @returns Whether the skill was installed, where, and why not when it was not
 */
export declare function installSkill(skillName: string, projectDir?: string): Promise<{
    installed: boolean;
    path: string;
    error?: string;
}>;
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