This “Today I Learned” repository is a living notebook of concise tips, commands, and gotchas collected across many tools and languages. Entries are intentionally short—often a paragraph and an example—so they’re easy to search, skim, and apply in a pinch. Topics span everyday developer concerns: shell one-liners, Git incantations, editor tricks, language quirks, and small debugging patterns that save time. Because each note is atomic, the collection grows organically without becoming a...