Our take
Anyone can reach the same frontier models. What a competitor cannot copy is your definition of good and your proof that you hit it on every release. That is the quality loop, and it is the advantage that compounds.
Define good, then defend it
The loop starts by knowing why a domain eval suite is the durable advantage, then turning your method into the archetypes, golden examples, and boundaries that say what good looks like. From there you decide what to measure each turn, validate the model that grades it, and check that an answer can be traced to a source. Then you gate every change on the suite, close the loop from production back into new evals, and re-score the whole thing when the model underneath you changes.
Why it compounds
Every failure you catch in production becomes a permanent check the next change has to pass, so the same mistake cannot ship twice. A better model does not reset that. It gets re-scored against your bar, and the gain shows up where you can measure it. The pieces here walk the loop from why it matters to how you run it.