cost-basis-engine
Installation
SKILL.md
Cost Basis Engine
Compute cost basis for crypto trades using multiple accounting methods and compare the resulting tax liability across methods. This skill handles the full complexity of on-chain activity: partial sells, token migrations, airdrops, staking rewards, LP entry/exit, and multi-hop swaps.
Disclaimer: This skill provides computational tools for informational purposes only. It does not constitute tax, legal, or financial advice. Consult a qualified tax professional for your specific situation. Tax law varies by jurisdiction and changes frequently.
Prerequisites
- Python 3.10+
- No external dependencies required (standard library only)
- Trade history as a list of dicts or CSV with columns:
date,action,token,quantity,price_usd,fee_usd