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Xavi Colomer — Journal

Long-form notes on building across software, hardware, and product. Barcelona, 23 years.

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Latest posts

Skills, Plugins, MCP: What's Actually Worth Installing in Claude Code

Every 'top 25 Claude Code skills' list is a star-inflated copy of the last one. Here's the checked version: what the three add-on types really are, and the five I'd install — with verified commands.

Stop Burning Tokens: A Field Guide to Claude Code

The features most people never find, and the handful of habits that quietly cut your Claude Code bill. Verified against the docs, with an interactive quiz to test yourself.