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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#174

Claude Design in Claude Code: the /design command that hands you an editable canvas

You describe it, Claude publishes a canvas of editable artboards, and you move the pieces yourself. Nothing to install.

#173

Claude Code in Concise mode: it finally stops rambling

You tell Claude Code to be concise and the novel comes back anyway. Since v2.1.237 there is a built-in style that doesn't ask: it writes it where nothing competes with it.

#172

Playwright MCP in Claude Code: give it eyes and it fixes its own work before you ask

Every Playwright MCP guide stops at the install. The interesting part starts right after: with a browser in front of it, Claude stops shipping blind and corrects itself.

#171

Claude Code auto update failed: the one line in claude doctor that says why (and why reinstalling won't fix it)

You see "auto update failed", you reinstall blind, and it comes back. The report already knows which of the four causes it was. Nobody told you which line to read.

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