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Explore practical guides, step-by-step masterclasses, and foundational definitions across AI, SQL, and data systems — written in plain, human English.
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How to explore a code project safely with ChatGPT Codex before changing it
Part 2 of the ChatGPT Codex tutorial. Explore a repo safely: ask for a map with real paths, bound what you will not touch, then make a small…
How to review Claude Code’s changes before you ship them
Part 9 of the Claude Code tutorial. Review every agent change set: read the diff, run tests, check secrets and scope, then own the commit. Undo with restore…
How to standardize messy category names in your data
Category chaos turns dashboards into spelling bees. Learn canonical values, mapping tables, alias lists, and how to escape Other hell so groupbys stay honest and unmapped rates stay…
How to start your first coding project with ChatGPT Codex
Codex is the coding agent surface in the ChatGPT desktop app (with Chat and Work). Part 1 of the ChatGPT Codex tutorial: open a project, ask orientation questions,…
How Claude Code works through multi-step tasks on its own
Part 8 of Claude Code tutorial. Run multi-step agentic work with a goal-plan-act-observe loop, checkpoints, and clear autonomy: watch, steer, or walk away only when rails are real.
