fyipedia 0.1.1

Unified CLI for FYIPedia developer tools — color, emoji, symbol, unicode, font, distance, time, name, unit, holiday.

fyipedia

Unified CLI for the FYIPedia developer tools ecosystem. One command (fyi) gives you instant access to 10 specialized tools -- color conversion, emoji lookup, symbol encoding, Unicode search, Google Fonts metadata, distance calculation, timezone operations, Korean romanization, unit conversion, and holiday dates -- all from your terminal.

Install once, use everything. Each plugin is loaded lazily -- only installed packages are registered. Install all 10 tools or pick just the ones you need.

Table of Contents

• Install
• Quick Start
• What You Can Do
  • Color Tools
  • Emoji & Unicode
  • Distance & Time
  • Units & Holidays
  • Fonts & Symbols
• Complete Command Reference
  • fyi color -- Color Tools
  • fyi emoji -- Emoji Tools
  • fyi symbol -- Symbol Encoding
  • fyi unicode -- Unicode Characters
  • fyi font -- Google Fonts
  • fyi distance -- Distance Calculation
  • fyi time -- Timezone Operations
  • fyi unit -- Unit Conversion
  • fyi name -- Name Tools
  • fyi holiday -- Holiday Dates
  • fyi version -- Plugin Status
• Plugin Architecture
• Available Plugins
• Features
• Also Available as MCP Server
• FYIPedia Developer Tools
• Links
• License

Install

pip install "fyipedia[all]"              # All 10 tools
pip install "fyipedia[color,distance]"   # Just color + distance
pip install "fyipedia[color,emoji,font]" # Pick any combination
pip install fyipedia                     # Core only (no plugins)

Requires Python 3.10+. Each plugin is an optional dependency -- install only what you need.

Quick Start

# Convert a hex color to 7 color spaces (RGB, HSL, HSV, CMYK, Lab, OKLCH)
fyi color info FF6B35

# Check WCAG contrast between two colors
fyi color contrast 000000 FFFFFF

# Generate Tailwind-style shade palette
fyi color shades 3B82F6

# Simulate color blindness (protanopia, deuteranopia, tritanopia)
fyi color blindness FF5733

# Calculate distance between Seoul and Tokyo
fyi distance calc --lat1 37.57 --lon1 126.98 --lat2 35.68 --lon2 139.65

# Convert temperature
fyi unit convert 100 celsius fahrenheit

# Convert weight
fyi unit convert 70 kilogram pound

# Look up current time in a timezone
fyi time now America/New_York

# Search for emojis by keyword
fyi emoji search fire

# Look up an emoji by slug
fyi emoji lookup fire

# Find upcoming holidays in the US
fyi holiday upcoming US

# Calculate Easter date for any year
fyi holiday easter 2026

# Romanize Korean text (Revised Romanization)
fyi name romanize 김민준

# Look up a Unicode character
fyi unicode info U+2764

# Encode a symbol in 11 formats
fyi symbol info "@"

# Get Google Fonts metadata and CSS
fyi font info inter

# Find font pairings
fyi font pairings inter

# Show installed plugins and versions
fyi version

What You Can Do

Color Tools

Colors are defined by mathematical relationships across multiple color spaces. The fyi color commands let you convert between 7 color spaces (RGB, HSL, HSV, CMYK, Lab, OKLCH, hex), check WCAG 2.1 accessibility contrast ratios, generate harmonious color palettes, and simulate how colors appear to people with color vision deficiencies like protanopia or deuteranopia.

fyi color info FF6B35          # Convert to 7 color spaces
fyi color contrast 1A1A2E F0F0F0  # WCAG contrast ratio + AA/AAA pass/fail
fyi color shades 3B82F6        # Generate Tailwind-style 50-950 shade palette
fyi color blindness FF5733     # Simulate protanopia, deuteranopia, tritanopia
fyi color harmonies 8B5CF6     # Complementary, analogous, triadic, tetradic

Learn more: ColorFYI · Color Converter

Emoji & Unicode

Unicode 16.0 defines 3,953 emoji characters across 10 categories, each with multiple encoding representations. The fyi emoji commands search the full emoji dataset and encode characters in 8 formats (UTF-8, HTML, CSS, JavaScript, Python, Java). The fyi unicode commands cover the broader Unicode standard with 17 encoding formats and 90 HTML entity mappings.

fyi emoji search celebration   # Search 3,953 emojis by keyword
fyi emoji encode "🎉"          # 8 encodings: UTF-8, HTML, CSS, JS, Python, Java
fyi unicode info U+2764        # Full Unicode character info (name, block, script)
fyi unicode encode U+00E9      # 17 encodings including Go, Rust, C/C++
fyi unicode search arrow       # Search characters by name

Learn more: EmojiFYI · UnicodeFYI

Distance & Time

The Haversine formula calculates great-circle distances between any two points on Earth using latitude and longitude coordinates. The fyi distance commands compute distances in kilometers, miles, and nautical miles, along with compass bearings, geographic midpoints, and estimated travel times. The fyi time commands handle IANA timezone conversions, UTC offsets, DST transitions, and business hours overlap across time zones.

fyi distance calc --lat1 37.57 --lon1 126.98 --lat2 35.68 --lon2 139.65  # Seoul to Tokyo
fyi distance bearing --lat1 40.7 --lon1 -74.0 --lat2 51.5 --lon2 -0.1   # NYC to London bearing
fyi time now Asia/Seoul        # Current time with UTC offset and DST status
fyi time diff Asia/Seoul America/New_York  # Time difference between zones
fyi time convert "2026-03-05 09:00" Asia/Seoul America/New_York  # Convert specific time

Learn more: DistanceFYI · TimeFYI

Units & Holidays

The SI system and its extensions define a web of conversion factors across 20 measurement categories. The fyi unit commands convert between 220 units with Decimal precision -- from everyday conversions like Celsius to Fahrenheit, to specialized units like pascals to atmospheres. The fyi holiday commands look up public holidays for 100+ countries using ISO codes, calculate Easter dates (Western and Orthodox), and check whether a given date is a holiday.

fyi unit convert 100 celsius fahrenheit   # Temperature conversion
fyi unit convert 70 kilogram pound        # Weight conversion
fyi unit categories                       # List all 20 measurement categories
fyi holiday upcoming US                   # Next public holidays in the United States
fyi holiday easter 2026                   # Western Easter date
fyi holiday check 2026-12-25 US,KR,JP    # Check holidays across countries

Learn more: UnitFYI · HolidayFYI

Fonts & Symbols

Google Fonts hosts over 1,700 font families used on millions of websites. The fyi font commands retrieve metadata for popular fonts including available weights, language subsets, CSS import snippets, and curated pairing recommendations. The fyi symbol commands encode any character in 11 formats (Unicode escape, HTML decimal/hex/entity, CSS, JavaScript, Python, Java, UTF-8/16, URL encoding) and expose Unicode properties like bidirectional class, script, and block membership.

fyi font info inter            # Metadata: weights, subsets, designer, popularity rank
fyi font pairings inter        # Curated font pairing recommendations
fyi font css roboto            # Ready-to-use CSS import + font-family declaration
fyi symbol info "@"            # Unicode properties + 11 encoding formats
fyi symbol encode "->"         # Encode any symbol in 11 formats

Learn more: FontFYI · SymbolFYI

Complete Command Reference

fyi color -- Color Tools

Command	Description	Example
info <hex>	Full color info in 7 color spaces	fyi color info FF6B35
contrast <fg> <bg>	WCAG 2.1 contrast ratio + AA/AAA checks	fyi color contrast 000000 FFFFFF
harmonies <hex>	5 harmony types (complementary, analogous, triadic, etc.)	fyi color harmonies FF6B35
shades <hex>	Tailwind-style 50-950 shade palette	fyi color shades 3B82F6
blindness <hex>	Color blindness simulation (4 types)	fyi color blindness FF5733
mix <hex1> <hex2>	Mix two colors in perceptual Lab space	fyi color mix FF0000 0000FF
compare <hex1> <hex2>	Delta E comparison + gradient	fyi color compare FF6B35 3498DB
gradient <hex1> <hex2>	Smooth gradient steps	fyi color gradient FF0000 0000FF

fyi emoji -- Emoji Tools

Command	Description	Example
lookup <slug>	Emoji metadata (char, codepoint, category, version)	fyi emoji lookup fire
search <query>	Search 3,953 emojis by keyword	fyi emoji search heart
encode <char>	8 encodings (UTF-8, HTML, CSS, JS, Python, Java)	fyi emoji encode "🔥"

fyi symbol -- Symbol Encoding

Command	Description	Example
info <char>	Unicode properties + 11 encodings	fyi symbol info "@"
encode <char>	11 encoding formats (HTML, CSS, URL, UTF-8, etc.)	fyi symbol encode "->"

fyi unicode -- Unicode Characters

Command	Description	Example
info <codepoint>	Full Unicode info (accepts U+hex, char, or hex)	fyi unicode info U+2764
encode <codepoint>	17 encodings (HTML, CSS, JS, Python, Go, Rust, etc.)	fyi unicode encode U+00E9
search <query>	Search characters by name	fyi unicode search heart

fyi font -- Google Fonts

Command	Description	Example
info <slug>	Font metadata (family, weights, subsets, designer)	fyi font info inter
css <slug>	CSS import snippet + font-family declaration	fyi font css roboto
pairings <slug>	Font pairing recommendations	fyi font pairings inter
search <query>	Search Google Fonts by name	fyi font search mono

fyi distance -- Distance Calculation

Command	Description	Example
calc	Distance, bearing, midpoint, travel times	fyi distance calc --lat1 37.57 --lon1 126.98 --lat2 35.68 --lon2 139.65
bearing	Compass bearing between two points	fyi distance bearing --lat1 40.7 --lon1 -74.0 --lat2 51.5 --lon2 -0.1
midpoint	Geographic midpoint	fyi distance midpoint --lat1 40.7 --lon1 -74.0 --lat2 51.5 --lon2 -0.1

fyi time -- Timezone Operations

Command	Description	Example
now <tz>	Current time in IANA timezone	fyi time now America/New_York
diff <tz1> <tz2>	Time difference between timezones	fyi time diff Asia/Seoul America/New_York
convert <time> <from> <to>	Convert time across timezones	fyi time convert "2026-03-05 09:00" Asia/Seoul America/New_York

fyi unit -- Unit Conversion

Command	Description	Example
convert <value> <from> <to>	Convert between 220 units in 20 categories	fyi unit convert 100 celsius fahrenheit
categories	List all measurement categories	fyi unit categories
list <category>	List units in a category	fyi unit list temperature

fyi name -- Name Tools

Command	Description	Example
romanize <text>	Korean Revised Romanization	fyi name romanize 김민준
elements <strokes>	Five Elements for CJK stroke count	fyi name elements 12

fyi holiday -- Holiday Dates

Command	Description	Example
upcoming <country>	Next N public holidays (ISO country code)	fyi holiday upcoming US
easter <year>	Western or Orthodox Easter date	fyi holiday easter 2026
check <date> <countries>	Check holidays on a specific date	fyi holiday check 2026-12-25 US,KR,JP

fyi version -- Plugin Status

$ fyi version
                 FYIPedia v0.1.0
┌────────────┬─────────┬───────────┐
│ Plugin     │ Version │ Status    │
├────────────┼─────────┼───────────┤
│ colorfyi   │ 0.2.0   │ installed │
│ emojifyi   │ 0.2.0   │ installed │
│ symbolfyi  │ 0.2.0   │ installed │
│ unicodefyi │ 0.2.0   │ installed │
│ fontfyi    │ 0.2.0   │ installed │
│ distancefyi│ 0.1.0   │ installed │
│ timefyi    │ 0.1.0   │ installed │
│ namefyi    │ 0.1.0   │ installed │
│ unitfyi    │ 0.1.0   │ installed │
│ holidayfyi │ 0.1.0   │ installed │
└────────────┴─────────┴───────────┘

Plugin Architecture

FYIPedia uses a lazy-loading plugin system. Each tool is an independent Python package with its own CLI module. FYIPedia discovers and registers them at startup:

fyipedia (hub)
├── fyi color    → colorfyi.cli.app    (if installed)
├── fyi emoji    → emojifyi.cli.app    (if installed)
├── fyi symbol   → symbolfyi.cli.app   (if installed)
├── fyi unicode  → unicodefyi.cli.app  (if installed)
├── fyi font     → fontfyi.cli.app     (if installed)
├── fyi distance → distancefyi.cli.app (if installed)
├── fyi time     → timefyi.cli.app     (if installed)
├── fyi name     → namefyi.cli.app     (if installed)
├── fyi unit     → unitfyi.cli.app     (if installed)
└── fyi holiday  → holidayfyi.cli.app  (if installed)

How it works:

1. Plugin registry defines 10 entries as (command_name, module_path, help_text) tuples
2. At startup, importlib.import_module() attempts to load each plugin's CLI module
3. Successfully loaded plugins are registered as Typer sub-commands
4. Missing packages are silently skipped -- no errors, graceful degradation
5. fyi version shows which plugins are installed and their versions

Creating a plugin -- any package that exports a typer.Typer app can integrate:

# mypackage/cli.py
import typer
app = typer.Typer(help="My custom tool")

@app.command()
def hello(name: str) -> None:
    typer.echo(f"Hello, {name}!")

Available Plugins

Plugin	Package	PyPI	Description
color	colorfyi		Color conversion (7 spaces), WCAG contrast, harmonies, shades, color blindness simulation
emoji	emojifyi		3,953 emoji metadata, search, 8 encoding formats
symbol	symbolfyi		Symbol encoding (11 formats), Unicode properties
unicode	unicodefyi		Unicode character info, 17 encodings, 90 HTML entities
font	fontfyi		50 Google Fonts metadata, CSS snippets, font pairings
distance	distancefyi		Haversine distance, bearing, midpoint, travel times
time	timefyi		Timezone operations, time differences, sunrise/sunset
name	namefyi		Korean romanization, Five Elements, CJK stroke count
unit	unitfyi		220 units across 20 categories, Decimal precision
holiday	holidayfyi		Holiday dates for 100+ countries, Easter calculation

Features

• 10 tools in one CLI: Color, emoji, symbol, Unicode, font, distance, time, name, unit, holiday
• Lazy plugin loading: Only installed packages are registered -- no startup penalty
• Flexible installation: Install all tools or pick specific ones via optional dependency groups
• Graceful degradation: Missing plugins are silently skipped, no import errors
• Rich terminal output: Formatted tables and colors via Rich
• Type-safe: Full type annotations, strict mypy, PEP 561 compliant
• Zero lock-in: Each plugin works standalone (colorfyi info FF6B35) or through the hub (fyi color info FF6B35)

Also Available as MCP Server

Use all 10 tools from AI assistants (Claude, Cursor, Windsurf) via the MCP hub server:

pip install "fyipedia-mcp[all]"

See the fyipedia-mcp README for integration guides.

FYIPedia Developer Tools

Part of the FYIPedia open-source developer tools ecosystem:

Package	PyPI	npm	Description
colorfyi	colorfyi	@fyipedia/colorfyi	Color conversion, WCAG contrast, harmonies, 809 named colors
emojifyi	emojifyi	emojifyi	Emoji encoding & metadata for 3,953 Unicode emojis
symbolfyi	symbolfyi	symbolfyi	Symbol encoding in 11 formats + Unicode properties
unicodefyi	unicodefyi	unicodefyi	Unicode character lookup, 17 encodings + search
fontfyi	fontfyi	fontfyi	Google Fonts metadata, CSS helpers, font pairings
distancefyi	distancefyi	distancefyi	Haversine distance, bearing, travel times
timefyi	timefyi	timefyi	Timezone operations, time differences, sunrise/sunset
namefyi	namefyi	namefyi	Korean romanization, Five Elements, CJK stroke count
unitfyi	unitfyi	unitfyi	Unit conversion, 220 units, 20 categories
holidayfyi	holidayfyi	holidayfyi	Holiday dates, Easter calculation, 100+ countries
fyipedia	fyipedia	--	Unified CLI (fyi command) for all 10 tools
fyipedia-mcp	fyipedia-mcp	--	Unified MCP server for AI assistants

Links

• FYIPedia GitHub Organization -- All repositories
• fyipedia-mcp -- MCP server for AI assistants
• awesome-fyi -- Curated list of FYIPedia resources
• Source Code -- MIT licensed

License

MIT