export type LocalImageErrorCode = 'RELATIVE_PATH_REJECTED' | 'FILE_NOT_FOUND' | 'PERMISSION_DENIED' | 'FILE_TOO_LARGE' | 'UNSUPPORTED_FORMAT' | 'INVALID_BASE64' | 'GLOB_TOO_LARGE' | 'SYMLINK_REJECTED';
export declare class LocalImageError extends Error {
    code: LocalImageErrorCode;
    path?: string;
    sizeBytes?: number;
    detail?: string;
    constructor(code: LocalImageErrorCode, message: string, opts?: {
        path?: string;
        sizeBytes?: number;
        detail?: string;
    });
}
export declare function resolvePath(input: string): string;
export declare function readImage(absolutePath: string): Buffer;
export declare function computeSha256(bytes: Buffer): string;
export declare function validateBase64(input: string): void;
/**
 * Expand a list of literal paths and glob patterns into a deduplicated
 * absolute-path array. Each pattern is expanded independently; results
 * are merged + deduplicated. ~/ is expanded BEFORE passing to fast-glob.
 *
 * Hard cap at MAX_GLOB_FILES across all patterns combined. Empty glob
 * matches return an empty result (not an error) so a typo'd glob doesn't
 * fail an otherwise-good batch.
 *
 * fast-glob options:
 *   - onlyFiles: true   (skip directory matches)
 *   - suppressErrors: true (per-file permission-denied → skipped, not fatal)
 *   - followSymbolicLinks: false (symlinks excluded; readImage rejects them anyway)
 */
export declare function expandGlobs(patterns: string[]): string[];
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