GitHub Light — Claude Code theme

This is the most battle-tested light palette on the internet, full stop. It's what github.com looks like by default, which means every open-source maintainer and most working developers have logged thousands of hours against exactly these grays, this blue, this red/green diff pair. Primer's team iterates it against accessibility contrast targets on real product surfaces — more QA than almost any standalone theme ever receives.

As an agent theme it's the pragmatist's pick for daylight. Pure white base, near-black text, accents chosen to survive small sizes and mediocre monitors — screenshares and projector demos stay readable where moodier light themes wash out. Diffs, again, are the native tongue: green means added-that, red means removed-that, no acclimatization needed. It's also the theme least likely to look strange in a screenshot pasted into an issue or a work chat.