Core Pool Complete

Key takeaway: This checkpoint consolidates Parts 1 and 2 of the Uniswap V3 reconstruction: the concentrated-liquidity math libraries (LiquidityMath, SqrtPriceMath, Tick, TickBitmap, Position, SwapMath) and the entire core pool surface (state and Slot0, mint with its callback, burn/collect, and the swap loop). Every rounding direction favors the pool, every fee is accounted per unit of liquidity in Q128, every payment is verified by balance checks rather than transferFrom, and every intentional overflow sits in an explicit unchecked block. The aggregated test suite below re-verifies the load-bearing line of each of those decisions across everything you have written since section 2.

What You Built

You wrote the core of Uniswap V3 — the engine behind the largest family of forked DEX code in existence. Not a toy version: the real bookkeeping, the real rounding discipline, the real loop, modernized to Solidity 0.8.x the same way Uniswap's own 0.8 branch does it.