This is issue 015 of href.email, your dose of interesting links about tech, dev and design.

We're not halfway the year yet and our font of the year award goes to… Datatype!

Datatype is a variable font that lets you build little charts just by typing out the values. It's a genuinely useful annotation tool for UIs, and a really impressive showcase of what variable fonts are capable of.

• Maintaining documentation means keeping screenshots up to date. The kind of todo on your list that stays afloat for weeks. But what if they self-updated?
• If you're considering building a product, Justin Jackson has some advice to follow on marketing it: prove that you're human. While everyone and their dog can whip up a SaaS by barking a few prompts, it's important to highlight the human aspect. "Is this thing dependable? Is it secure? Are these people going to be around in a year? Are they shipping regular updates, or was this a vibe-coded weekend project that's going to disappear in three months?"
• Jakub Krehel shared a bunch of skills to make your interfaces better. The agent skills are nice to have, but we're really here for the human-facing content with beautiful examples.
• Linear code is more readable. We often default to extracting every little step into a function, but sometimes that hurts more than it helps. "Do not extract small functions from linear code, especially if you only use them once. None of the benefits offsets the loss in linearity."
• Plannotator is a neat open source tool to collaboratively make a plan with your agent.
• We were excited AWS was about to push some huge UI improvements, but disappointment ensued when we found out it was just a proof of concept.