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Compound

by @xueyetianya

Calculate compound interest and investment growth using financial formulas. Use when you need to plan savings, compare rates, or project wealth.

Versionv1.0.0

Downloads457

Installs1

#finance #legal

View on ClawHub →

TERMINAL

clawhub install compound

📖 About This Skill

name: compound version: "1.0.0" description: "Calculate compound interest and investment growth using financial formulas. Use when you need to plan savings, compare rates, or project wealth." author: BytesAgain homepage: https://bytesagain.com source: https://github.com/bytesagain/ai-skills tags: [finance, compound-interest, calculator, investment, savings, planning]

Compound — Compound Interest Calculator

Compound is a command-line compound interest calculator that helps you plan investments, compare interest rates, build amortization schedules, and project financial growth over time.

All calculation history is stored in ~/.compound/data.jsonl as JSONL records for future reference and comparison.

Prerequisites

Python 3.8+ with standard library

bash shell

Commands

`calculate`

Calculate compound interest for a given principal, rate, and time period.

Environment Variables:

PRINCIPAL (required) — Initial investment amount

RATE (required) — Annual interest rate as percentage (e.g., 5.5)

YEARS (required) — Number of years

FREQUENCY — Compounding frequency: daily, monthly, quarterly, annually (default: monthly)

CONTRIBUTION — Regular contribution amount (default: 0)

CONTRIB_FREQ — Contribution frequency: monthly, quarterly, annually (default: monthly)

Example:

PRINCIPAL=10000 RATE=7.5 YEARS=20 FREQUENCY=monthly bash scripts/script.sh calculate

`compare`

Compare multiple interest rate or compounding frequency scenarios side by side.

Environment Variables:

PRINCIPAL (required) — Initial investment amount

RATES (required) — Comma-separated list of rates to compare (e.g., "3,5,7,10")

YEARS (required) — Number of years

FREQUENCY — Compounding frequency (default: monthly)

`schedule`

Generate a detailed payment/growth schedule showing balances at each period.

Environment Variables:

PRINCIPAL (required) — Initial investment amount

RATE (required) — Annual interest rate as percentage

YEARS (required) — Number of years

FREQUENCY — Compounding frequency (default: monthly)

CONTRIBUTION — Regular contribution amount (default: 0)

`table`

Display a year-by-year summary table of investment growth.

Environment Variables:

PRINCIPAL (required) — Initial investment amount

RATE (required) — Annual interest rate

YEARS (required) — Number of years

CONTRIBUTION — Regular contribution (default: 0)

`rate`

Calculate the required interest rate to reach a financial goal.

Environment Variables:

PRINCIPAL (required) — Starting amount

TARGET (required) — Target amount

YEARS (required) — Time period in years

FREQUENCY — Compounding frequency (default: monthly)

`goal`

Calculate how long it takes to reach a savings goal.

Environment Variables:

PRINCIPAL (required) — Starting amount

TARGET (required) — Goal amount

RATE (required) — Annual interest rate

CONTRIBUTION — Regular contribution (default: 0)

`chart`

Generate an ASCII chart of investment growth over time.

Environment Variables:

PRINCIPAL (required) — Initial amount

RATE (required) — Annual interest rate

YEARS (required) — Number of years

WIDTH — Chart width in characters (default: 60)

HEIGHT — Chart height in lines (default: 20)

`export`

Export calculation history to a file.

Environment Variables:

OUTPUT — Output file path (default: stdout)

FORMAT — Export format: json, csv, jsonl (default: json)

CALC_ID — Specific calculation ID to export (default: all)

`config`

View or update default configuration settings.

Environment Variables:

KEY — Configuration key to set

VALUE — Configuration value

`history`

View past calculations with their results.

Environment Variables:

LIMIT — Maximum entries to display (default: 20)

SORT — Sort by: date, principal, rate, total (default: date)

`help`

Display usage information and available commands.

`version`

Display the current version of the compound tool.

Data Storage

All calculations are stored in ~/.compound/data.jsonl. Each line is a JSON object with fields:

id — Unique calculation identifier

timestamp — ISO 8601 creation time

type — Calculation type (calculate, compare, goal, etc.)

params — Input parameters

result — Calculation results (final amount, interest earned, etc.)

Configuration

Config stored in ~/.compound/config.json:

default_frequency — Default compounding frequency (default: monthly)

currency_symbol — Currency symbol for display (default: $)

decimal_places — Number of decimal places (default: 2)

⚙️ Configuration

Config stored in ~/.compound/config.json:

default_frequency — Default compounding frequency (default: monthly)

currency_symbol — Currency symbol for display (default: $)

decimal_places — Number of decimal places (default: 2)