Interactive Explainers
Study pages for engineers who need to understand a mechanism well enough to make a call. Each section is one claim, proved by an interactive figure you can push to its flip point; every sentence traces to a source.
Training
GRPO: Group Relative Policy Optimization
How GRPO turns a handful of sampled answers into a training signal without a value network: a primer, four interactive studies and the decisions they settle
Protocol
MCP 2026-07-28: Stateless Core, Extensions, Tasks
What the 2026-07-28 revision of the Model Context Protocol changes and how the new mechanisms behave: seven stepped figures, their notes quoted or paraphrased from the specification and the extension specs, plus what to build with today