You are six months into a codebase and a bug surfaces in production. You open git log and find: “fix”, “WIP”, “update”, “asdf”, “fix2”, “final”, “final_FINAL”. The history tells you nothing. You cannot bisect, you cannot understand intent, and you cannot determine whether any of those commits introduced the regression. This is not a minor …
You have GitHub CLI installed. You use it to clone repos and maybe open a pull request from the terminal. That covers about 10% of what it can do. The other 90% — the part that eliminates context switches, automates repetitive repository tasks, and lets you drive your entire GitHub workflow without touching a browser …
You ask the model to review your authentication middleware. It returns a surface-level summary: “the code looks clean, consider adding error handling.” That output is useless. The model did not understand its role, the codebase context, or what “review” actually means in a production environment. Role prompting fixes this — not by making the model …
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You hit a spike in INP on a mid‑tier phone after a few taps. On your laptop the metric looks fine. In production users see the problem; local runs do not reproduce it without tracing. You, a senior developer, must treat this like a measurement problem, not a CSS poke. Inspect Element answers layout questions. …