We had Barbara Bonfim on "Live with Intelligems" this month. She runs the experimentation program at Levi's, and at some point she said something that I think deserves more airtime than a 30-minute livestream: "The learning library is something no competitor can copy." She was talking about the practice of treating your test results not as a log of what you shipped or didn't ship, but as a compound knowledge base. A relational database of what you've learned about customer behavior, tagged by page, metric, segment, and user type. One-sentence insights. The rationale behind each hypothesis. What happened in Europe vs. the US. What new users did differently from returning ones. The test result is the starting point, not the output. I've seen this gap everywhere. Teams that run solid programs still tend to treat the learning phase as a formality. The report gets filed, and the institutional knowledge lives in whoever ran the test. When that person leaves, or just gets busy, the knowledge evaporates. What Barbara has been building doesn't depend on any single person. She frames it this way: the purpose of your program isn't the tests you run. It's the knowledge you compound. Two programs running the same number of tests per month can diverge dramatically in value over 18 months depending on whether one of them is building a relational database or not. She also laid out an MVP version for anyone starting from scratch: a relational database (even a spreadsheet), dropdown fields for test outcomes and next actions, an open text field for key learnings, and tags for browsing. Something the whole org can access. She's now building an AI layer on top of it so stakeholders can query it in natural language. Not just storing learnings, but making them retrievable at the moment a decision needs to be made. The full interview is attached below if you want to watch the whole conversation. Curious where this community is at with this. Are you maintaining something like a knowledge library, and who in your org actually reads it? And if anyone has experimented with putting an AI layer on top of one, I'd love to hear what that looks like in practice.