Edition of Wednesday, July 1, 2026

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Peter Yang Plans to Install Explain-Diff Skill to Learn Code Reading

Product builder Peter Yang says he is still learning to read code and plans to install the explain-diff skill, responding to a Geoffrey Litt thread on understanding code written by AI agents.

Peter Yang @petergyang ·Jul 1, 2026 ·🔖 bookmarked

Original post · 1 min read

As someone still trying to learn how to read code this is great! Installing the explain-diff skill asap

Geoffrey Litt @geoffreylitt
Hot take: I think it's still important to understand the code that our agents write!

In this mega thread (based on my AIE talk today), I will explain why that's the case, and show some ideas for how to efficiently understand code. Alright, let's dive in. 1/

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Science & Health5/10

Alan Couzens Says Most People Can Raise VO2max Above 50 by Age 50

Coach Alan Couzens says nearly any healthy 50-year-old can train to push VO2max above 50 ml/kg/min, though only about 5% of men and 1% of women do, and urges readers to stay in that minority.

Alan Couzens @Alan_Couzens ·Jul 1, 2026 ·🔖 bookmarked

Original post · 1 min read

And now for the good news...

Just about any reasonably healthy 50 year-old can train their body to be fit enough to push their VO2max north of 50.

And yet...

Only ~5% of men and ~1% of women will.

Be a part of that few percent.

Your future self will thank you.

Alan Couzens @Alan_Couzens
If your VO2max at 50 isn't already 50 ml/kg/min+, your chance of it being there when you hit age 70-80 isn't great.

It only gets harder.

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