Originally published on Homingo Learn .

Custom slash commands in Claude Code turn a prompt you type every day into a one-word command, with arguments and live project context filled in before Claude reads it.

Custom commands and skills: the same thing now

Custom slash commands have been merged into skills. A file at .claude/commands/review.md and a skill at .claude/skills/review/SKILL.md both create /review and behave the same way; existing command files keep working. Claude can also run either one by itself when its description matches the task, unless you set disable-model-invocation: true . The single-file command is the quickest to write. Choose the skill folder when the command needs reference files or scripts next to it (see how to write a SKILL.md ). If both exist with the same name, the skill wins.

How to create a custom slash command (.claude/commands)

The file name becomes the command name. Subfolders become a namespace: .claude/commands/video/qa.md is /video:qa .…