What is Command?
Packages an action as an object. Supports undo, queues, and logging because the request is a thing you can store.
edit stored as a card · undone
Command pattern turns an action into…
Write it in your own words in the app.
In real work
Command: BoldCommand wraps the text edit so undo replays the inverse without special cases.
In the illustration
A BOLD card is punched and dropped on the spike and the text block turns bold; the undo lever lifts the top card back off and runs it in reverse, so the text goes plain.
Model each editor action in your coding agent as a command object with execute and undo, then wire a history stack so Cmd-Z works for the last twenty actions.
Try it now
The fastest way to learn a word is to use it. Open this line in the agent you already work in and watch what it does. Change the tool to the one you use.
Go further
01Practice
Make it stick
One term a day, a short quiz, and sentence practice that checks your own words.
02Verify
Prove you know it
Pass the quiz and keep it in a Skills Wallet you can share with anyone who needs proof.
03Career
Find the work that uses it
See which roles lean on this vocabulary, and what they pay in year one.
More in Foundations
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Google gives a definition. Prompthaus pairs each term with how it shows up in standups, PRs, prompts, and design reviews. Then it quizzes you until the word sticks. One term a day on iPhone.
