Drag the file into the DeepSeek Harness Web GUI

Key features

• with the composer focused it inserts native reference bubbles via the slash/input-insert-reference scoped event (U+FFFC occurrences rendered by the composer backdrop) and the registered inputTriggers codec serializes them to @filename on submit
• Drag files from your system file manager straight into the DeepSeek Harness web GUI.
• The host half keeps the per-session file registry behind the dropped_files tool, writes fallback text copies to .dsh-drops/ /, and persists pasted binaries via the file-copy route (base64)
• they are sent along with your message (including their absolute paths), and render as file cards inside the user bubble.