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cost-basis-engine

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Multi-method cost basis computation including specific identification, FIFO, LIFO, HIFO, and proportional average cost with partial sell handling

skills/cost-basis-engine/SKILL.md

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# 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`

## Methods Overview
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