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

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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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#154

Does Claude Code index your codebase? No, and what to do instead when the repo is big

Almost nobody arrives at this question out of curiosity. They arrive deciding whether to bolt a search MCP onto it. The answer is no, and there are two things you should do instead.

#153

Claude Code browser: which of the three to use, and why the Desktop one is not your Chrome

Claude Code has three ways to hand Claude a browser and most people don't know which one they are asking for. The Desktop one starts on a clean profile with none of your logins, and that is the whole decision.

#152

Vim mode in Claude Code: how to stop reaching for the Escape key

Claude Code has a full vim mode inside the prompt, motions and text objects included. And for a few versions now you can stop reaching for Escape on every sentence, though the fine print has four rules you would never guess.

#151

--dangerously-skip-permissions in Claude Code: why your script exits green without doing anything

Your CI job calls `claude -p`, exits 0, and the commit isn't there. Nothing warned you, which is why half the internet ends up pasting `--dangerously-skip-permissions` into the pipeline.

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