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.

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#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.

#190

claude plugin validate: catch what breaks your plugin before anyone installs it

One command reads your plugin.json, your skills, your agents and your hooks, and tells you which lines Claude Code will ignore at load time. What it stays quiet about matters just as much.

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