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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#220

"Request rejected as unprocessable by the model" in Claude Code: too many images, your session survives

"Request rejected as unprocessable by the model" in Claude Code blocks every turn in long sessions with hundreds of screenshots. Why it happens, the fix, and how to save the session if you can't update.

#219

claude --dangerously-skip-permissions: what it skips and where it's safe

--dangerously-skip-permissions turns off Claude Code's permission prompts, but not all of them, not as root and not anywhere. What it skips, how to turn it on, and where it's safe to run.

#218

Claude Code bypass permissions: project settings no longer turn it on

bypassPermissions in a project's .claude/settings.json stopped working in 2.1.257, with no warning: the session starts in Manual and asks before every action. Where it still works, tested.

#217

"Prompt is too long" in Claude Code: when /compact can't fix it

"Prompt is too long" in Claude Code comes in several versions, and some warn you that compacting won't help. What follows the · tells you which one you have.

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