/** Relative path of Copilot's instruction file inside a host project. */
export declare const COPILOT_INSTRUCTIONS_RELATIVE_PATH: string;
/** Result of the Copilot instructions install pass. */
export interface CopilotInstructionsInstallResult {
    /** True when Lisa created the file (false when it already existed). */
    readonly created: boolean;
    /** Path written, relative to the host project root (or undefined on no-op). */
    readonly relativePath: string | undefined;
}
/**
 * Write a starter `.github/copilot-instructions.md` at the host project root,
 * but only if the file doesn't already exist.
 *
 * @param destDir - Absolute path to the host project root.
 * @returns Result describing whether a file was created.
 */
export declare function installCopilotInstructions(destDir: string): Promise<CopilotInstructionsInstallResult>;
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