PaperSpine UI

Use this branch whenever paper_spine_config.json is missing, incomplete, or the user asks to configure PaperSpine interactively.

Required Behavior

The supported interaction is a real terminal window launched by the installed launch_paperspine_ui.ps1 (resolve its absolute path under ~/.codex/skills/... or ~/.claude/skills/...). Do not run input()-based Python inside a hidden tool surface when the host cannot expose stdin.

In Claude Code, /paperspine must call this branch automatically when config is missing.

In Codex, launching this window opens a visible GUI/terminal, which Codex treats as an escalated action — request it with sandbox_permissions: require_escalated, or the window will not reliably appear. Launch the UI as the first action when config is missing; do not infer config from materials instead.