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.

Helping companies and teams go AI First on the Claude platform.

Claude Code

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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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#243

Claude Code keeps asking to trust the folder: home is never remembered

Claude Code asks you to trust the folder on every launch from your home directory, because that answer lasts one session. What gets saved, for which folder, and how to stop answering it.

#242

Make Claude Code subagents cheaper: run quick ones at low effort

Claude Code subagents inherit your session's effort: at max, a five-line explanation spent 10,921 output tokens against 586 at low. One line in CLAUDE.md sets the level for each one.

#241

Claude Code flickering in the terminal: stop it without losing the session

Claude Code flickers or jumps to the top of the scrollback when you're on the classic renderer. How to tell which one you're on, switch to fullscreen without losing the conversation, and what changes for search and copy.

#240

Claude Code keeps asking for permission on commands you allowed: the && splits them

Claude Code splits every chained command at its operators and checks each part against your rules. Why `npm run build && npm test` still prompts with `npm test` allowed, what option 2 on the prompt saves, and how to settle it.

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