This skill helps make TUIs that look intentionally designed (not generic), using only what terminals support: spacing, alignment, borders, icons, and a small set of text attributes (color, bold, underline, reverse).

1) Decide first (always)

Before coding, write 3 lines:

• Purpose: what the app does and who uses it.
• Aesthetic: pick ONE: minimal / ops-console / retro / editorial / playful.
• Signature: one memorable thing (layout motif or interaction), e.g. “thin left rail + inspector”, “command palette”, “preview-on-focus”.

2) Layout = design

• Use a grid mindset: consistent margins, gutters, and blank lines.
• Prefer 2–3 regions max: header / main / footer (optional side panel).
• Handle small terminals: collapse side panel → stack vertically.

3) Hierarchy without font sizes

Use these, in order:

1. Spacing (blank lines, indentation)
2. Alignment (columns, right-aligned numbers)
3. Rules (─ / -) and section titles
4. Bold for headings
5. Reverse for selection (sparingly)

4) Color rules (safe by default)

• Use semantic tokens, not random colors: accent, muted, danger, warning, success.
• Never rely on color alone: pair with text/icon (✓ OK, ! ERR).
• Keep it tight: 1 accent + status colors.
• Provide fallbacks: truecolor → 256 → 16; Unicode borders → ASCII.

5) Keyboard-first interaction

• Focus must be obvious (caret › + highlight).

• Consistent keys:

  • move: arrows + j/k (optional)
  • switch panels: tab / shift+tab
  • open: enter
  • back/close/cancel: esc

• Footer shows contextual hints: Enter Open • / Search • ? Help • q Quit

6) States (must-have)

• Loading: show what’s happening (“Fetching…” + spinner/progress).
• Empty: explain what it is + show the next action (“Press a to add”).
• Error: short + actionable; allow “copy details” if possible.

7) Animation (use very little)

• Only for feedback: spinner/progress, brief flash on success.
• No large-area flicker; update only changed regions.

8) Avoid “generic TUI”

• Don’t border everything. Use borders only where structure helps.
• Don’t rainbow-paint. Keep one accent.
• Don’t ship 40 shortcuts. Start small; expose more via ? help.

Output expectations

When you generate code, include:

• theme tokens + fallbacks
• resize-safe layout
• clear focus/selection styling
• loading/empty/error handling
• one consistent signature motif (visual or interaction)