Dynamic typing is fine in a notebook and expensive in a long-running pipeline. Notes on using type annotations, TypedDict, Literal and union types so a bad value fails at check time instead of four hours into a run.
WooCommerce added a Subscriptions Health Check tool under Status. It finds subscriptions stuck on manual renewal after the HPOS cache bug, plus active subs with missing or overdue payment dates. Here is what caused it, and what the changelog left out.
AI coding tools copy whatever patterns already exist in a repo and know nothing about battery budgets or packet sizes. In IoT that combination turns into technical debt faster than a team can refactor it away.
An LLM can retrieve the right document and still quote the wrong price. This is the detection and healing layer I built to catch that: five failure patterns, a faithfulness score, deterministic patches, and a SQLite drift monitor that caught a real bug in staging.
One ballot label counted as two parties made English local elections look like they were splintering. The fix was normalizing party families before aggregation instead of after, and the headline finding reversed once we did.
Two graphs moving together is not proof one caused the other. A PHP helper for Pearson r, the nonlinear cases a correlation check misses, and the hidden variables that make a new theme look guilty.
set_detect_anomaly points at the wrong layer and costs you 10x on CPU. A forward hook adds roughly 3ms per pass, names the layer that produced the NaN, and pairs with a gradient norm check that fires a step earlier.
Naive before-and-after averages said the London tube strikes lifted bike usage by 5.5%. A two-way fixed effects model with clustered errors put it at 3.95%. This is why the second number is the one to trust.
A junior dev tried to delete the .git folder to undo a bad merge. Here is what to do instead: the three trees, the three git reset modes, git revert for commits you already pushed, and the reflog for when a hard reset takes the wrong thing.
Asking a chatbot for a WooCommerce snippet is a lever pull, and the losing pulls are the hard ones to spot. Where LLM generated code breaks WordPress sites, what it does to coding standards, and why per-token pricing makes it worse.