Datapuddle vs. Layer

A native Mac app for querying Parquet, CSV and .duckdb files with SQL. Millions of rows, column profiles in every header, visual query plans. Powered by DuckDB. DuckDB has been my swiss-army knife for a while now. I have a special place in my heart for polished native macOS apps. My somewhat outsized and exaggerated dislike for electron/webkit based has lead me toil away on several native macOS apps on my own...mostly to not much profit :)I wanted to build a nice DuckDB client. Though I usually reach for TablePlus, my favorite multi-db client on Macs, I felt like there wasn't a nice DuckDB oriented experience.One thing that I used DuckDB for on locally on my desktop is dealing with larger datasets. And paging is something that was annoying a...

One API for prediction markets. Find markets, stream normalized data, place orders, and track positions across Kalshi and Polymarket. Hi HN, I'm David. I built Layer, an API + SDK or building trading bots/ai agents across prediction markets.The idea came from something i kept running into while playing with trading bots. Once your bot needs access to more than 1 venue, you suddenly have to deal with different market schemas, contract definitions, prices, fees and APIs before you can reason about where to trade. That gets messy real fast, especially with prediction markets. The same real-world event can exist on Kalshi & Polymarket, but the contracts can be represented differently.Here's my broader thesis:...