slightlyuseless/memecoin-trading-bot ? reverse-engineered prompt

Build me a simple but solid Solana memecoin trading bot that I can run with one command and tweak from a single config file.

I want it to watch for new pump.fun launches, pump.fun migrations, and new Raydium SOL pools, then observe each candidate for a short time before deciding whether to buy. Please make the buy decision strategy based, so I can swap in my own custom entry logic later without touching the rest of the bot. Include a default strategy and a momentum style one, plus an easy way to add more.

It should also do basic safety checks, manage open positions automatically, and handle take profit, stop loss, trailing stop, max hold, and dev sell exits. I want support for multiple wallets, persistent positions that keep managing after restart, and clear logging of trade history and why something was skipped or rejected. If you need to check current Solana or Helius docs while wiring things up, go ahead.