// ENGINEERING BLOG
How the assistant is built
Notes from the team on indexing, ranking, evaluation and the parts that are harder than they look.
- August 18, 2026
The first index of a million-line repository takes four minutes. Every index after it follows your saves. Here is what…
- August 4, 2026
For three months our acceptance rate was stuck. The completions were right; the order was wrong. Fixing the order moved…
- July 21, 2026
Every assistant claims a benchmark. Most benchmarks measure the benchmark. This is the evaluation set we use internally and why…
- July 2, 2026
An automated reviewer that comments on everything is a reviewer nobody reads. The whole design problem is deciding what to…
- June 16, 2026
Adding a language takes us about three weeks, and almost none of it is parsing. Here is where the time…