Outils agentiques : Claude Code et Copilot
Des assistants qui lisent, écrivent et exécutent du code pour vous.
Outils agentiques : Claude Code et Copilot est une leçon Vibe Coding gratuite sur CoddyKit. Ceci est la leçon 2 sur 4. Tu peux lire la leçon complète ci-dessous gratuitement — puis la pratiquer en direct dans le navigateur avec un éditeur de code intégré et un tuteur IA 24/7. Elle fait partie du parcours d'apprentissage Vibe Coding, et ta progression se synchronise sur le web et l'application CoddyKit. Le cours Vibe Coding comprend 4 leçons au total.
Certaines parties de cette leçon n'ont pas encore été traduites et s'affichent en anglais.
Beyond Autocomplete
Some AI tools don't just suggest code — they act. They read your files, write new ones, run commands, and check the results, all from a single instruction.
These are agentic tools. The two you'll hear about most are Claude Code and GitHub Copilot. Think of them as a teammate you can delegate whole tasks to.
What 'Agentic' Means
A normal assistant answers a question. An agent takes a goal and works toward it in multiple steps — reading, writing, running, and adjusting.
Tell an agent 'add a contact form to my site' and it will find the right file, write the form, wire up the button, and tell you what it changed. You supervise; it does the legwork.
Claude Code: The Terminal Agent
Claude Code is Anthropic's agent that runs in your terminal (and inside editors too). You type a request in plain English, and it explores your project, edits files, and can run commands like installing packages or starting your app.
It's powerful because it works across many files at once and explains each step as it goes.
In Claude Code you might type:
"Add a dark mode toggle to my web app. Update the HTML, CSS and JavaScript so clicking it switches between light and dark themes."Letting Claude Code Run Things
The magic of an agent is that it can run code and read the output. If your app errors, Claude Code can run it, see the error, and fix it — looping until it works.
For safety, it asks before doing anything important, like deleting files or running commands. You approve each risky step.
"Run my project, and if there are any errors in the console, fix them and run it again until it works."GitHub Copilot
GitHub Copilot started as smart autocomplete — it suggests the next line as you type. It has since grown a chat and an agent mode that can make multi-file changes too.
It's built right into editors like VS Code, so the suggestions appear inline as faint 'ghost text' you accept with a key press.
Copilot's Ghost Text
As you type a comment or a function name, Copilot guesses the rest. You'll see grey suggested text — press Tab to accept it.
This is great for momentum: write a clear comment describing what you want, and let Copilot fill in the code below it.
// add two numbers and return the result
function add(a, b) {
return a + b;
}
console.log(add(3, 4));Comment-Driven Building
A neat trick with Copilot: write your intent as a comment first, then let the AI implement it. Your comments become a kind of prompt.
Clear comments lead to clear code — vague ones lead to guesses. The clearer you describe the goal, the better the suggestion.
// show a friendly greeting based on the time of day
function greeting(hour) {
if (hour < 12) return "Good morning!";
if (hour < 18) return "Good afternoon!";
return "Good evening!";
}
console.log(greeting(9));Claude Code vs Copilot
Both are agentic, but they shine in different moments:
- Claude Code — best for big, multi-step tasks and running/fixing code end-to-end. Strong reasoning, terminal-native.
- Copilot — best for fast inline suggestions while you're already typing in your editor.
Many builders use both: Copilot for flow, Claude Code for the heavy lifting.
The Supervise-and-Approve Loop
With agents you're the manager, not the typist. The healthy loop looks like this:
- Describe the goal clearly.
- Let the agent plan and act.
- Read what it changed (the diff).
- Approve, or ask for a fix.
You stay responsible for the result — the agent just moves fast.
Writing Good Instructions
Agents reward clear, complete instructions. Tell them the goal, any constraints, and how you'll know it worked.
A strong agent instruction reads almost like a small task ticket — specific enough that there's only one reasonable way to do it.
"Create a new file called todo.html with a simple to-do list: an input box, an 'Add' button, and a list below it. Adding an item should clear the input. Use only plain HTML, CSS and JavaScript in one file."When to Reach for an Agent
Use an agent when a task is bigger than a single line:
- Building a feature that spans several files.
- Fixing an error you can't figure out.
- Setting up or running a project.
- Refactoring or renaming across the codebase.
For tiny inline tweaks, plain autocomplete is often enough.
Quick Check
What makes a tool like Claude Code 'agentic' rather than just an autocomplete?
Recap: Delegating to Agents
Agentic tools turn you into a manager of code:
- Claude Code runs in the terminal, handles multi-step tasks, and can run/fix code.
- Copilot gives fast inline suggestions and has an agent mode too.
- Write clear instructions; review every diff; approve risky steps.
Next: browser-based app builders like v0, Bolt and Lovable that go from prompt to running app instantly.
Questions Fréquemment Posées
La leçon « Outils agentiques : Claude Code et Copilot » est-elle gratuite ?
Oui — le texte complet de « Outils agentiques : Claude Code et Copilot » est gratuit à lire ici sur le web. Pour la pratiquer de manière interactive (un éditeur de code intégré et un tuteur IA 24/7) et déverrouiller le reste du cours Vibe Coding, passe à CoddyKit PRO. Le cours Vibe Coding comprend 4 leçons au total.
Qu'est-ce que j'apprendrai dans « Outils agentiques : Claude Code et Copilot » ?
Des assistants qui lisent, écrivent et exécutent du code pour vous. Tu pratiques Vibe Coding avec du code pratique que tu exécutes directement dans le navigateur, et un tuteur IA 24/7 répond à tes questions au fur et à mesure que tu avances dans la leçon.
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Aucune expérience préalable n'est requise. Vibe Coding sur CoddyKit est structuré pour les débutants jusqu'aux apprenants avancés, donc tu peux commencer ici ou depuis le début et avancer à ton rythme. Ceci est la leçon 2 sur 4.
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Peux-tu écrire et exécuter du code dans cette leçon Vibe Coding ?
Oui. Chaque leçon Vibe Coding inclut un éditeur de code intégré, tu écris et exécutes du vrai code directement dans ton navigateur et tu reçois des retours IA instantanés — aucune configuration locale requise.
Toutes les leçons de ce cours
- Éditeurs de code dotés d’IA : Cursor et Windsurf
- Outils agentiques : Claude Code et Copilot
- Créateurs d’applications : v0, Bolt et Lovable
- Choisir le bon outil