Journal
Signals from inside the box.
Engineering deep-dives, product updates and research notes from the team building BLACKBOX07.
Product
Evals are the new unit tests
Why prompt changes deserve the same rigor as code — and how to set up a golden set in an afternoon.
Engineering
Guardrails that don’t slow you down
Inline policy checks for PII, jailbreaks and custom rules — without adding a second round trip.
Research
What we learned routing 3 billion requests
Patterns, surprises and a few hard lessons from a year of production traffic.
Company
Introducing BLACKBOX07 v2.0
Agentic evals, voice routing and a completely rebuilt trace explorer. Here’s everything that’s new.
Product
Designing traces humans can actually read
How we turned thousands of spans into a view a product manager can understand in ten seconds.