A client’s detector found the gearboxes and ignored the bolts, and the problem was the loss function rather than the dataset. Here is how the YOLOv1 loss splits into five terms, why width and height get a square root, and what the lambdas are for.
MRR said a WooCommerce store search was fine while shoppers kept skipping the top result. Here is why binary relevance metrics mislead, and how NDCG and ERR score a result list closer to the way people read one.
A friend’s AI resume draft claimed an Azure certification he never had. Three hours of prompt tweaking did not stop it, but indexing his verified work history did, and a grounded mini model beat an ungrounded larger one.
A client’s weekend-built AI agent fell apart the moment real users touched it. Here is what the NeMo Agent Toolkit handled for us that my own custom wrapper could not: YAML config, grounded tools, and a server you get for free.
An AI coding agent invented table names on a 50k SKU WooCommerce sync until I wrote the schema down for it. Here are the context files I now keep in every project, and why decisions made in meetings need to end up in the repo too.
A 60-page research PDF nobody ever opened became a set of virtual personas the team could actually question mid-sprint. Here is the setup, the kind of data you need to feed it, and the mistake that makes the whole thing useless.
A price tracker taught me that a hand-built Google scraper dies within two days. Here is why I hand that job to SerpApi now, plus the PHP wrapper I reuse and the latency setting that matters at scale.
A client thought their WooCommerce recommendation engine was broken because accuracy at a 0.5 threshold read 51%. The ranking was fine, the threshold was not. This walks through checking AUC in a spreadsheet with sorted scores and the trapezoidal rule.
A client handed me an MVP he had built over a weekend in Cursor. It looked polished until I tried to add one calculation and found no schema underneath any of it. This is the case for settling the data model before you open a coding assistant.
A client once sent me a 50-page persona PDF that said nothing about why people abandon checkout. Functional personas built with AI from support tickets and order notes tell you what a customer is trying to finish and where they stop.