Dispatch 001: the hub is open

DSA Panicle is moving from a single DSA site to a structured knowledge hub: the DSA content now lives under /dsa, and the root domain is a landing page for every subject we're building - practice, fundamentals and certifications, filed onto one shared shelf layout.

This is the first post on the new /blog, where we'll write up what we build and why - starting with the redesign itself and the traced-playground engine underneath it.