One entry point for format conversion: documents via pandoc, images via Pillow (with resize and quality), audio/video via ffmpeg, plus directory batch mode. Probes every external dependency first and prints the exact install command when something is missing. Use when the user asks to convert file format / png to jpg / batch convert images / compress image size / video transcode / format conversion / media conversion utility. Do NOT use for editing file contents, extracting archives, or OCR of scanned documents.
