hjkl — learn Vim by doing

Hjkl, a free browser-based tool for learning Vim by making real edits, launched from developer Duy Hua (duy.run). The tool teaches core Vim skills—such as fixing typos with `x`, changing words with `w`/`c`, deleting lines with `dd`, copying with `yy`, searching with `/`, and using counts like `3w` and `2dd`—through guided, prompted, and independent edits in a browser Vim editor. Each skill runs six edits total, and any valid edit reaching the target text passes, with `:help` available in Normal mode. It requires no account, stores nothing, and needs a desktop browser with a physical keyboard. The launch matters because it lowers the barrier to Vim adoption, a skill valued for editing efficiency among developers. Watch for adoption among new developers and whether Hjkl expands beyond its current skill set or adds features like the accompanying Vim commands cheat sheet and llms.txt.