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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#123

Never let an MCP login interrupt your session again in Claude Code

An MCP login always lands mid-task: it stops you, opens the browser, makes you fight the callback. There's a command that pulls it out of the session and gets it done once. And it's the only thing that works headless.

#122

Claude Code in JetBrains: IntelliJ and PyCharm without switching to VS Code

Code in IntelliJ or PyCharm and think Claude Code's nice integration is a VS Code thing? There's an official plugin that lights up your JetBrains IDE: diffs in the viewer, shared selection, and file references. And no, it's not JetBrains' AI Assistant.

#121

Fable 5 is back in Claude Code: everything you need to know

Fable 5 vanished from your picker on June 12 and returns on July 1. It comes back stricter: expect more automatic reroutes to Opus 4.8, even on routine code. The timeline and what to do, here.

#120

Sonnet 5 in Claude Code: near-Opus quality, at Sonnet prices

Sonnet 5 just landed in Claude Code: the most agentic Sonnet yet, with 1M context and near-Opus 4.8 quality at a clearly lower cost. Here's what changes for you and how to switch (heads-up: on Max your Default is still Opus).

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