VS codeのAI補間を無効化する VS codeのAI補間を無効化する

Visual Studio Code's built-in AI code completion has become a default part of the editing experience, but not every developer welcomes the constant stream of ghost-text suggestions. This article walks through how to disable those AI completions for users who would rather code without algorithmic interruptions.

The procedure centers on VS Code's Settings panel. By searching for inline suggestions or Copilot-related options and toggling them off, users can suppress the AI-driven ghost text that appears while typing. Depending on the configuration, this may involve disabling the GitHub Copilot extension itself, switching off inline completions globally, or restricting them to specific languages. After applying the changes, the editor falls back to traditional IntelliSense, snippets, and manual typing.

The broader context is worth noting. Over the past couple of years, Microsoft has tightened the integration between VS Code and GitHub Copilot, extending it from simple autocompletion to chat panels and agentic workflows. While many developers see this as a productivity boost, others find it distracting, especially when learning a new language, writing carefully reviewed production code, or working in environments where sending code fragments to a remote service raises compliance concerns.

The ability to opt out is therefore more than a cosmetic preference. It reflects an ongoing tension between AI-first defaults and user control. Competing editors such as JetBrains IDEs, Cursor, and Zed have followed similar trajectories, baking AI features deeply into the UI while still exposing toggles to disable them. As AI assistance becomes the assumed baseline across developer tooling, knowing how to turn it off cleanly may be just as valuable as knowing how to use it effectively.