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

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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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#157

Teleport in Claude Code: the command that looks like Remote Control and does the opposite

Two Claude Code commands accept the same session ID and do opposite things with it. One looks in on the session, the other takes it away, and mixing them up leaves your work somewhere other than where you thought.

#156

Claude Code diagrams: a picture beats 100 lines of Markdown

Since 4 August, Claude Code has carried a skill that appears in neither the changelog nor the docs. It only surfaces in the command menu, and it changes what you get when you ask for a diagram: the path the data takes instead of a box with a name in it.

#155

MCP task in Claude Code: what that new counter in your status line means

A call to your MCP server vanishes from the conversation and a counter you have never seen appears at the bottom. It has not hung, and what you do in the next few minutes decides whether you get the result back.

#154

Does Claude Code index your codebase? No, and what to do instead when the repo is big

Almost nobody arrives at this question out of curiosity. They arrive deciding whether to bolt a search MCP onto it. The answer is no, and there are two things you should do instead.

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