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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#235

"Unrecoverable interface error" in Claude Code: ten causes, one update

"Unrecoverable interface error" in Claude Code ends the session on the spot, but nothing is lost. Ten known causes, fixed between 2.1.275 and 2.1.289, and what to do when --resume itself hits it again.

#234

Focus view in Claude Code for VS Code: read replies, not tool calls

Focus view, in Claude Code's VS Code extension, folds tool calls, their results and thinking into expandable rows. You keep your prompts and Claude's replies, and one shortcut brings everything back.

#233

modelPicker in Claude Code: trim /model to the models you actually use

modelPicker decides which rows /model lists, in your order and under your labels. With replaceBuiltInOptions: true the rest disappears, and behavesAs removes the unknown-model warning from a gateway or Bedrock ID.

#232

Claude Code idle compaction: it compacts before your cache expires

You step away from a 300K-token conversation. At minute 54 Claude Code compacts it before the cache expires, so your first message back doesn't pay for the whole history again.

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