New episode covering Bandit’s engineering in more depth than I’ve seen elsewhere.
Stack trace clarity. One process per connection means errors produce entirely Elixir frames - no C boundary obscuring the failure. Maters more than most benchmarks at incident time.
The HPACK bug. Six months, Wireshark, one misread line in a 30-page RFC. Cowboy silently handled the same edge case differently. This is what correct HTTP implementation actually costs.
WebSock / WebSock Adapter split. Separate libraries because a web server depending on another web server as a runtime dependency is absurd. Keeps Bandit and Cowboy independent while sharing the abstraction.
The AI-generated HTTP/3 PR. Open. Unmerged. Mat writes Bandit by hand while fully AI-native in his day job. The episode is honest about what that choice means.
