The editor holds the keyboard from the moment the card window opens, and NSTextView answers an image-only pasteboard with a disabled Paste row — so the window's image branch sat one responder below the keyboard and could never be reached by it. The yield is by capability (readablePasteboardTypes), the same shape as the editor's existing refusal of file drops: any text flavor keeps the paste in the editor, and a pasteboard the editor has no reading of passes paste: to the responder behind it. Live-probed with real window-server ⌘V chords in both windows. Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy