Juan Andrés Núñez.

Senior Frontend Engineer specializing in Agentic AI, professional educator and speaker. Where engineering meets humanism.

Juan Andrés Núñez
Focusing on
Building FrontendLeap: teaching how to build the professional Web with GenAI and learning science.
Claude Code

Claude Code: from zero to professional. Tips, tutorials and deep dive guides from an engineer who uses it 12 hours a day.

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#104

AGENTS.md: the standard Cursor, Codex and Copilot read, but Claude Code doesn't

AGENTS.md is the standard Cursor, Codex, Copilot and half a dozen others read. Claude Code is the exception: it reads CLAUDE.md, not AGENTS.md. The good news is you join them in one line and keep a single file.

#103

Claude Code in VS Code: the panel Anthropic recommends and almost nobody uses

Most people run `claude` in the integrated terminal and think that's using Claude Code in VS Code. There's a native panel, the one Anthropic recommends, that reviews plans, shows inline diffs, and lets you @-mention line ranges. Plus what still sends you back to the terminal.

#102

Conditional rules in Claude Code: stop loading your whole CLAUDE.md every session

Your CLAUDE.md grows and loads whole every session, no matter how much of each part you use. There's a folder that makes each rule show up only when it matters.

#101

/model in Claude Code: why your model sticks or resets when you didn't mean to

You picked a model once and now every session starts on it. Or the opposite: you change it and it reverts on its own. A silent v2.1.153 change explains both.

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