Installer JetBrains AI Assistant dans IntelliJ IDEA et VS Code : connexion, complétion inline et chat

Installez le plugin ou l’extension VS Code, connectez-vous avec votre compte JetBrains, puis obtenez la première suggestion inline ou posez une question contextualisée dans AI Chat.

The first hour with JetBrains AI Assistant in IntelliJ IDEA or VS Code usually breaks on the wrong plugin, never finishing JetBrains Account sign-in, or never seeing inline completions and AI Chat connect. Install from official docs, authenticate in the browser, then trigger one inline suggestion or ask one project-context question in a repo you own.

La requête est installer et utiliser JetBrains AI Assistant dans IntelliJ IDEA et VS Code. This page follows JetBrains docs at jetbrains.com/help/ai-assistant/installation-guide-ai-assistant.html, activation at jetbrains.com/help/ai-assistant/activation-scenarios.html, inline completion at jetbrains.com/help/ai-assistant/code-completion.html, and VS Code Marketplace item JetBrains.jetbrains-ai-assistant. It is a JetBrains IDE assistant, not this site’s meeting product. For a short huddle to review a diff, open a room on wbmeet; see créer et rejoindre une salle.

Check your editor and license path first

JetBrains AI Assistant is a separate plugin in JetBrains IDEs (not bundled by default) and extension JetBrains.jetbrains-ai-assistant in VS Code. IntelliJ-family IDEs need version 2023.3+; Community Edition needs 2024.1.1+ (PyCharm Unified 2025.1+). After install and activation you can use a JetBrains AI subscription, the automatic 30-day AI Pro trial for new users, AI Pro bundled with All Products Pack / dotUltimate, or during the VS Code public preview a free AI EAP license after JetBrains Account sign-in; you can also connect third-party API keys or integrated agents (Junie, Claude Agent, Codex, GitHub Copilot).

IntelliJ IDEA: install plugin, sign in, inline completion, chat

1. 1

   Install the AI Assistant plugin

   Open IntelliJ IDEA, go to Settings/Preferences | Plugins | Marketplace, search AI Assistant, click Install, and restart. You can also click Install Plugin in the AI Chat tool window or Let's Go in the JetBrains AI header widget. Confirm you installed JetBrains’ AI Assistant plugin—not a placeholder AI Chat shell without code access.

2. 2

   Activate with JetBrains Account

   After install the plugin checks license status: an active JetBrains AI subscription activates automatically; All Products Pack / dotUltimate users get AI Pro; new users receive an automatic 30-day AI Pro trial linked to the JetBrains Account. In the JetBrains AI widget or Settings | Tools | AI Assistant | Providers & API keys, click Activate JetBrains AI, sign in in the browser, and accept JetBrains AI Terms of Service. Prefer your own models? Pick a third-party provider and enter an API key instead.

3. 3

   Enable and test inline completion

   Open Settings | Editor | General | Code Completion | Inline, ensure Enable inline completion using language models is on, and choose Cloud or Cloud and local. Open your project, type in a source file, wait for gray inline suggestions, then Tab to accept and Esc to dismiss. You can also enable completion in Commit Messages or AI Chat input on the same page.

4. 4

   Open AI Chat and attach project context

   Use the AI Chat tool window or View | Tool Windows | AI Chat. Reference files, folders, symbols, or commits with @ context—start read-only, e.g. “Where is the entry point of this module?” Switch to agent mode only after connectivity works; the first-hour goal is verification, not production edits.

VS Code: install extension, sign in, completion, chat

1. 1

   Install from the Marketplace

   Open VS Code, Cmd+Shift+X / Ctrl+Shift+X, search JetBrains AI Assistant, publisher JetBrains, Install. Extension id: JetBrains.jetbrains-ai-assistant (also on Open VSX for Cursor, Windsurf, etc.). Official docs note this is a pre-release extension—install from the in-editor Marketplace; if CLI reports “no release version,” use the UI or a documented .vsix file.

2. 2

   Sign in with JetBrains Account

   Open the JetBrains AI Assistant sidebar or sign-in command, choose Sign in with JetBrains Account, complete OAuth in the browser. During preview: existing subscriptions work immediately; without one, sign-in grants a free AI EAP license. Organizations can use AI Enterprise. Never paste account tokens into prompts or commit them to Git.

3. 3

   Trigger inline completion and AI Chat

   Open a local folder workspace, type in source files and Tab to accept ghost text. Open AI Chat, attach current file or workspace context, ask a read-only question before small edits. VS Code and IntelliJ share the same JetBrains AI backend—useful when teams mix editors.

# First hour · JetBrains AI Assistant · as of 2026-09
# IntelliJ IDEA
# 1. Settings | Plugins | Marketplace → AI Assistant → Install → Restart
# 2. JetBrains AI widget → Activate JetBrains AI → browser login
# 3. Settings | Editor | Code Completion | Inline → enable cloud completion
# 4. Type in .java/.kt → Tab · AI Chat → @file ask read-only question
# VS Code
# 1. Extensions → JetBrains AI Assistant (JetBrains.jetbrains-ai-assistant)
# 2. Sign in with JetBrains Account (preview: AI EAP if no subscription)
# 3. Open folder → inline Tab · AI Chat with workspace context
# Do not share JetBrains accounts. Review every AI diff.

IntelliJ vs VS Code at a glance

Official path: install AI Assistant plugin or VS Code extension → JetBrains Account sign-in/activation → confirm Inline cloud completion → type and Tab → AI Chat with @ context and a read-only question. Plans and preview policy follow jetbrains.com/ai and the help center.

Plugin does not read code by default

JetBrains docs state AI Assistant does not access your code until you install, activate, and accept applicable terms. Org admins can disable it by policy.

Preview policy may change

The VS Code extension is in public preview; EAP licensing and post-release pricing may shift. Trust what your JetBrains Account page shows.

This is not a meeting-product guide

Only JetBrains AI Assistant’s first hour. Short whiteboard call: wbmeet or quand ne pas ouvrir une appli de réunion lourde.

Questions worth checking