Terminal UI Design

Create distinctive, production-grade terminal interfaces with intentional aesthetics. Don't just print text—craft an experience.

Quick Start

Before coding, choose a bold aesthetic direction:

Style	Vibe	Colors	Borders
Cyberpunk	Neon, futuristic	Hot pink #ff00ff, cyan #00ffff, purple #1a0a2e	Block █▀▄
Amber Terminal	Vintage CRT	#ffb000 on black	Double ╔═╗
Minimalist Zen	Clean, focused	Nord palette, cool blues	Rounded ╭─╮
Retro Mainframe	Corporate, formal	Green on black	ASCII-only +-+
Synthwave	80s nostalgia	Purple, pink gradients	Heavy ┏━┓
Monochrome Brutalist	Stark, bold	Single color + intensity	Heavy ┏━┓

Pick ONE direction and execute it with precision.

Design Thinking Checklist

Question	Decision Point
Purpose	What problem? Who uses it? What workflow?
Tone	Pick extreme: cyberpunk, zen, retro, maximalist, playful
Constraints	Python Rich, Go bubbletea, Rust ratatui, ANSI codes?
Differentiation	What makes this UNFORGETTABLE?

Box Drawing & Borders

Choose borders that match your aesthetic:

Single:     ┌─────┐ │   └─────┘  Clean, modern
Double:     ╔═════╗ ║   ╚═════╝  Bold, formal, retro
Rounded:    ╭─────╮ │   ╰─────╯  Soft, friendly
Heavy:      ┏─────┓ ┃   ┗─────┛  Strong, industrial
Dashed:     ┄┄┄┄┄┄ ┆              Light, airy
ASCII:      +-----+ |   +-----+  Retro, universal
Block:      █▀▀▀▀█ ▄   ▀▀▀▀▀    Chunky, brutalist

Pro tip: Use decorative corners: ◆ ◈ ✦ ⬡ ◢◣◤◥

Color Strategies

Strategy	When to Use	Technique
ANSI 16	Universal compatibility	Classic palette, craft unique combos
256-color	Rich but portable	Gradients, subtle variations
True color	Modern terminals	Full spectrum, smooth transitions
Monochrome	Elegant constraint	Single color, vary intensity

Create atmosphere:

• Background color blocks for sections
• Gradient fills: ░▒▓█
• Semantic color (avoid cliché red=bad, green=good)
• Reverse video for emphasis
• Dim for secondary, bold for primary

Typography

The terminal is ALL typography:

Technique	Effect	Example
ASCII art headers	Dramatic intro	figlet style banners
Text weight	Hierarchy	Bold, dim, normal
Decoration	Emphasis	Underline, italic, strikethrough
Letter spacing	Headers	H E A D E R
Case	Voice	ALL CAPS headers, lowercase body
Unicode symbols	Richness	→ • ◆ ★ ⚡ λ ∴ ≡ ⌘ ✓ ✗
Custom bullets	Personality	▸ ◉ ✓ ⬢ › instead of -

Block:    ███████╗██╗██╗     ███████╗
Slant:    /___  / / // /     / ____/
Small:    ╔═╗┌─┐┌─┐
Minimal:  [ HEADER ]

Layout & Spatial Composition

Break free from single-column output:

Element	Usage
Panels & Windows	Distinct regions with borders
Columns	Side-by-side information
Tables	Aligned data, Unicode table chars
Whitespace	Generous padding, breathing room
Density	Match purpose—dense dashboards, sparse wizards
Hierarchy	Visual distinction: primary, secondary, chrome
Asymmetry	Off-center titles, weighted layouts

Motion & Animation

Element	Examples
Spinners	⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏, ⣾⣽⣻⢿⡿⣟⣯⣷
Progress bars	▓░, █▒, [=====> ], ◐◓◑◒
Typing effects	Character-by-character reveal
Transitions	Wipe effects, fade with color intensity
Live updates	Streaming data, real-time charts

Data Display

Type	Technique
Sparklines	▁▂▃▄▅▆▇█ inline mini-charts
Bar charts	Horizontal bars with block chars
Tables	Smart sizing, alternating rows, aligned nums
Trees	├── └── │ hierarchies
Status	● green, ○ empty, ◐ partial, ✓ complete
Gauges	[████████░░] with percentage

Decorative Elements

Dividers:   ───── ═════ •••••• ░░░░░░ ≋≋≋≋≋≋
Sections:   ▶ SECTION, [ SECTION ], ─── SECTION ───, ◆ SECTION
Textures:   · ∙ ░ patterns for backgrounds
Icons:       (if Nerd Fonts available)

Anti-Patterns to Avoid

❌ Avoid	✅ Instead
Plain unformatted text	Styled output with intent
Default colors	Cohesive palette
Generic [INFO] prefixes	Styled prefixes with icons
Simple ---- dividers	Unicode dividers ───── ═════
Walls of text	Structured panels and sections
Generic progress	Creative spinners and bars
Boring help	Formatted, aligned help text
Inconsistent spacing	Precise alignment

Library Quick Reference

Language	Libraries
Python	Rich, Textual, curses, prompt_toolkit
Go	Bubbletea, Lipgloss
Rust	Ratatui
Node.js	Ink, Blessed, cliui
Pure	ANSI escape codes

ANSI Escape Codes

\x1b[1m       Bold
\x1b[3m       Italic
\x1b[4m       Underline
\x1b[31m      Red foreground
\x1b[38;2;R;G;Bm  True color (RGB)
\x1b[2J       Clear screen
\x1b[H        Cursor home

Implementation Pattern

1. Choose aesthetic first (cyberpunk, zen, retro, etc.)
2. Define palette (2-3 colors + background)
3. Select border style (single, double, rounded, block)
4. Create reusable components (panel, table, status)
5. Apply consistently across all output

Resources

File	When to Load
references/box-drawing.md	Need border character reference
references/ansi-codes.md	Need escape code reference
references/color-palettes.md	Need pre-defined palettes

Exit Criteria (Code Verified)

• Output has intentional aesthetic (not generic)
• Cohesive color palette used throughout
• Borders and typography match chosen style
• No plain text without formatting
• Anti-patterns avoided