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.
WooCommerce ran a bug blitz: support engineers, not the core team, shipped more than 170 fixes across 20-plus products in a few weeks, helped along by Claude Code and a purpose-built dev environment skill. Here is how that workflow held together.
Notes from the latest WordPress AI contributor meeting: the MCP client is becoming a normal plugin instead of a Composer package, the Abilities API is getting real exception handling, and AI agents are getting a proper block dictionary.
In a 200-task benchmark, nearly 91% of ReAct agent retries were spent on errors that could never succeed. The three fixes I use: an error taxonomy, per-tool circuit breakers, and tool routing that stays in code.
Woo ran a Bug Blitz: support engineers with Claude Code and Copilot shipped over 170 fixes across 20 products, every line reviewed by quality engineers. Why it worked and what to copy.
Tool vendors promise 40% productivity gains and the backlog never moves. Amdahl’s Law explains why speeding up 5% of the work buys you 5%, and why I would rather measure cognitive load than coding speed.