Suggestions: crypto exchange fee schedules (Data Sources) and an engineering blog on live-trading plumbing (Blogs)

Two suggestions, per the README's "submit an issue" contribution path.

Data Sources → Cryptocurrencies

• Crypto exchange futures fee schedules — https://pddjf.com/tools/crypto-exchange-fee-calculator/ (JSON: https://pddjf.com/data/exchange-fees.json). Per-tier maker/taker rates for USDT-perpetual futures on nine exchanges (Binance, OKX, Bybit, Bitget, MEXC, Gate, Kraken, KuCoin, HTX), read from each exchange's public fee page with the check date recorded; a dated change log with official sources is at https://pddjf.com/exchange-fee-changes/ (RSS available). Useful for putting realistic tiered fees into crypto backtests instead of a flat assumption.

Blogs

• SignalCraft Labs engineering articles — https://pddjf.com/articles/ — practitioner write-ups on the plumbing around live systematic trading: broker order reconciliation after a restart, IBKR session restarts and pacing limits, TradingView webhook de-duplication, FIX execution-report audit logs. Companion dependency-free demos: https://github.com/yfjelley/signalcraft-labs-engineering-notes.

Disclosure: I maintain both. No objection if only one fits.