Combine Claude Code skills and commands into one workflow

Now that you've mastered the fundamentals (CLI, context files) and power tools (commands, skills, hooks), it's time to combine them into a single, cohesive project.

We will build an interactive Personal Study Buddy. This system will combine:

• A custom skill (.claude/skills/study-buddy/SKILL.md) that guides Claude on how to quiz you.
• A local workspace setup that holds your mock quiz records.
• An interactive session to trigger quiz questions.

Let's write the custom skill that instructs Claude Code on how to behave as an encouraging, smart study assistant.

A skill lives in its own folder under .claude/skills/, with the instructions in a file named SKILL.md. Create one for our study buddy:

mkdir -p .claude/skills/study-buddy && echo '# Personal Study Buddy Skill

You are a helpful study buddy. Ask me three multiple-choice questions about Git and Terminal commands. Wait for my answer after each question. Give constructive feedback.' > .claude/skills/study-buddy/SKILL.md

This file serves as Claude's customized operational checklist.

To allow the study buddy to keep track of our performance, let's create a blank text file where Claude can log our scores:

echo 'Quiz Score History:
' > quiz-scores.txt

Having this file in our workspace allows Claude Code to read past history and append our new scores at the end of the session.

Launch Claude Code from your project folder. Because the skill and score file already live in the workspace, Claude can read and write them on demand:

claude

Once in the session, kick off the quiz by typing:

/study-buddy

Then ask Claude to record your result:

Save my final score into quiz-scores.txt.

Claude Code will load the skill, present the first multiple-choice question, wait for your response, grade your answer, and finally record the result in quiz-scores.txt.

Type /exit when you finish the session.