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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#136

Paste screenshots into Claude Code with Ctrl+V (and why some silently vanish)

You save the screenshot, drag it in, type out the path. Skip all of it: one key pastes it straight into the prompt. And if you ever tried and nothing happened, it wasn't you.

#135

Attribution in Claude Code: strip the 'Co-Authored-By: Claude' line from your commits

Claude Code signs every commit it touches, unless you tell it no twice: once for the model, once for the CLI itself.

#134

Why Claude gets worse the longer your session runs

Hours into the same session, Claude starts fumbling things it used to nail. It didn't get dumber, and nothing's down. It's your context, and it filled up. The fix is two commands.

#133

Claude Code doesn't just write your code, it explains it

When you land in a repo you didn't write, Claude Code can explain every pattern and decision as it works, instead of just leaving the code done. Even Claude Code's creator recommends it, and you can pin it to the project.

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