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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#194

Move Claude Code to a new machine: what to copy from ~/.claude and what to leave behind

Your ~/.claude weighs gigabytes and your own part fits in a megabyte. Copying it whole drags three traps along: the login, the paths and the machine identity.

#193

Conditional hooks in Claude Code: run only when it matters

Your PreToolUse hook spawns a process on every single call, match or not. The `if` field filters before that process exists, using the same permission-rule syntax your allowlist already uses.

#192

/chrome in Claude Code: let Claude work in your Chrome session

Claude Code spots the extension and offers to use your Chrome from now on: your tabs, your cookies, your open sessions. What that yes actually allows depends on a setting you configured for something else entirely.

#191

Claude Code diff panel: stop asking what changed and watch it live

In a wide enough terminal, /diff no longer takes over the prompt: it docks beside the conversation and refreshes on every edit. And what you select in it goes with your next question.

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