/**
 * Image detection, validation, caching, and clipboard reading utilities.
 */
export interface DetectedImage {
    /** As written in message, or "clipboard" */
    originalPath: string;
    /** Absolute path to source file */
    resolvedPath: string;
    /** Path in content store images directory */
    cachedPath: string;
    /** MIME type (image/png, image/jpeg, etc.) */
    mediaType: string;
    /** Base64-encoded file contents */
    base64Data: string;
    /** File size in bytes */
    sizeBytes: number;
}
export interface ImageProcessingResult {
    /** Successfully processed images */
    images: DetectedImage[];
    /** User text with image paths replaced by [IMAGE: filename] */
    cleanedText: string;
    /** Errors encountered during processing */
    errors: Array<{
        path: string;
        error: string;
    }>;
}
/**
 * Process all image references in a message text.
 * Detects file paths, validates, caches, and encodes images.
 * Returns processed images and cleaned text with paths replaced by [IMAGE: filename].
 */
export declare function processImagesInMessage(text: string, contentBasePath: string): Promise<ImageProcessingResult>;
/**
 * Read image data from the system clipboard.
 * Platform-specific: macOS (osascript), Linux X11 (xclip), Linux Wayland (wl-paste).
 * Returns null if clipboard has no image data.
 */
export declare function readClipboardImage(contentBasePath: string): Promise<DetectedImage | null>;
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