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

✦ New tips daily

Claude Code: from zero to professional. Tips, tutorials and deep dive guides from an engineer who uses it 12 hours a day.

Explore the tips →
Claude Code Tips View all →
#214

Claude Code worktree: review any PR by letting Claude run it on its own

`claude --worktree "#1234"` fetches that PR into its own folder and Claude puts it through its paces: installs, runs the tests, reports back. Your branch stays open in the other terminal, uncommitted changes included.

#213

Sonnet 5.5 vs Opus 5.5 in Claude Code: the same work at half the cost, and faster

Anthropic says Sonnet 5.5 costs up to 30% less than Sonnet 5. I tested it over 48 runs in Claude Code, against Sonnet 5 and against Opus 5.5, your default: it passed everything for under half of what Opus 5.5 cost. Plus when Opus is still worth it.

#212

You've hit your session limit in Claude Code: how to make it continue on its own when the limit resets

When Claude Code stops you with You've hit your session limit, it no longer sits idle until you're back: it waits for the limit to reset and picks the task up on its own. How to turn it on in the terminal and in Desktop, and when it won't.

#211

Claude Code scheduled tasks: 3 common failures and how to fix them

A local Claude Code task only runs while the app is open and the machine is awake. Otherwise it gets skipped, shows up hours late, or waits on a permission nobody is there to approve.

Gravitas

Get only what matters

If I have nothing worth saying, you won't hear from me. When I do, you'll be the first to know. 7,000+ people already trust this.

Are you a professional Web developer?
No

Unsubscribe at any time.