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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#085

When CLAUDE.md, skills, and MCP collide in Claude Code: which one wins?

You define the same skill, MCP server, or rule in two places. Claude Code doesn't resolve the clash with one rule — it uses three, and the direction isn't always the one you'd guess.

#084

Workflows in Claude Code, shipped with Opus 4.8: hundreds of subagents at once

The same day as Opus 4.8, Claude Code shipped dynamic workflows: Claude writes a script that orchestrates hundreds of subagents for the refactor or audit that never fit in one conversation.

#083

LSP in Claude Code: the code navigation you don't know is switched off

Claude Code ships a built-in LSP tool — goToDefinition, findReferences, type diagnostics — but it comes switched off. And the #1 mistake turning it on is thinking the plugin does something it doesn't.

#082

.worktreeinclude in Claude Code: the file that keeps your .env from vanishing

You create a worktree, your app won't start, and Claude burns tokens debugging a non-bug. .worktreeinclude fixes it in one line — and you probably don't know it exists.

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