https://djhuman.net/notes/One open-source repository a week, and the decision behind it: adopt, build or buy.https://djhuman.net/notes/mapie/https://djhuman.net/notes/mapie/Tue, 03 Nov 2026 09:00:00 +0000Turns a stated risk appetite into the exact point where a model stops deciding and a person takes over, with a statistical guarantee, and warns when that line no longer holds.https://djhuman.net/notes/lancedb/https://djhuman.net/notes/lancedb/Tue, 27 Oct 2026 09:00:00 +0000Vector, keyword and hybrid search in a folder of files, with every version of the index kept, so retrieval ships without a new server to run and a bad re-index can be rolled back like bad code.https://djhuman.net/notes/openinference/https://djhuman.net/notes/openinference/Tue, 20 Oct 2026 08:00:00 +0000Standard traces for every model call your product makes, with tokens, latency and outcome per step, so the question "what does this feature cost per customer" gets an answer from evidence, and the failures that look like success get caught.https://djhuman.net/notes/hatchet/https://djhuman.net/notes/hatchet/Tue, 13 Oct 2026 08:00:00 +0000Multi-step AI jobs that survive a crash without paying twice for the steps that already worked, and retry the flaky ones on their own, on the Postgres you already run.https://djhuman.net/notes/scenario/https://djhuman.net/notes/scenario/Tue, 06 Oct 2026 08:00:00 +0000Simulated customers who argue, change their minds and push back, run against your agent before every release, so the failures you did not think to script show up in a test report before they show up in a complaint.https://djhuman.net/notes/datacontract-cli/https://djhuman.net/notes/datacontract-cli/Tue, 29 Sep 2026 08:00:00 +0000A written, tested agreement between the team that changes the data and the team whose model depends on it, so a quiet schema change stops at the build instead of reaching a customer.