Plan Mode
beginnerDefinition
A Claude Code mode where Claude reads your project and writes a step-by-step plan for you to approve, without changing any files until you say yes; press Shift+Tab (or type /plan) to turn it on.
In the wild
Before reorganizing the recipe site, you switch on plan mode, read Claude's list of the files it means to change, cross out one step, and approve the rest.
More from Claude Code
--plugin-dir
A Claude Code launch option that loads a plugin straight from a folder on your computer for one session, so you can try it while you're still building it.
@-mention (File Reference)
Typing @ followed by a file's name in a Claude Code prompt to point Claude at that exact file, so it doesn't have to search for it.
Agentic Loop
The repeating cycle Claude Code works in: look around the project, take one step such as editing a file or running a command, check what happened, and decide the next step until the task is done.
Checkpoint (/rewind)
A restore point Claude Code saves before each edit Claude makes, so you can run /rewind (or press Esc twice) to go back to an earlier moment. It only tracks Claude's own file edits, so it doesn't replace Git.
CLAUDE_PLUGIN_ROOT
A placeholder, written `${CLAUDE_PLUGIN_ROOT}`, that Claude Code swaps for the folder a plugin is installed in, so the plugin's file paths work on everyone's computer. That folder changes with each update, so anything the plugin needs to keep goes in `${CLAUDE_PLUGIN_DATA}` instead.
CLAUDE.md
A notes file in your project that Claude Code reads at the start of every session, holding the rules and commands you'd otherwise repeat in every prompt (/init writes a starter version).