One post tagged with "VSCode"

TL;DR​

VSCode Copilot Agent Mode is an experimental feature that lets AI automatically execute multi-step tasks (including editing files and running terminal commands). Enable it by adding "github.copilot.chat.agent.enabled": true to your settings.json. Perfect for repetitive refactoring and batch file modifications.

Problem​

Traditional Copilot Chat only suggests code snippets, requiring you to:

1. Manually copy the code
2. Switch to the target file
3. Paste and adjust
4. Repeat for each change

This workflow becomes extremely inefficient when modifying multiple files.

Root Cause​

Copilot's Ask Mode is designed as a "suggester": it outputs code but doesn't execute actions. This is a safety feature, but for developers who trust AI, it adds significant manual overhead.

Agent Mode acts as an "executor": AI can directly edit files and run commands, enabling true automated programming.

Solution​

1. Enable Agent Mode​

Add to VSCode settings.json:

{
  "github.copilot.chat.agent.enabled": true
}

Or search for @id:github.copilot.chat.agent.enabled in Settings and check the box.

2. Switch to Agent Mode​

In the Copilot Chat panel, click the mode dropdown and switch from "Ask" to "Agent":

┌─────────────────────────────┐
│  Ask ▼  │  Agent ▼  │  Edit │
└─────────────────────────────┘

3. Usage Examples​

Scenario: Batch Rename Function

Rename getUserName to fetchUserProfile in all files under src/utils

Agent Mode will automatically:

1. Scan the src/utils directory
2. Find all files containing getUserName
3. Modify each file and save

Scenario: Add TypeScript Types

Add return type annotations to all exported functions in src/api/*.ts

4. Tool Permission Control​

Agent Mode requests confirmation before executing sensitive operations. Adjust in settings:

{
  "github.copilot.chat.agent.autoToolConfirmation": {
    "readFile": true,      // Auto-allow file reading
    "editFile": false,     // Require confirmation for edits
    "runInTerminal": false // Require confirmation for commands
  }
}

5. Available Tools​

Agent Mode can call these tools:

FAQ​

Q: What's the difference between Agent Mode and Ask Mode?​

Ask Mode only suggests code, requiring manual copy-paste; Agent Mode can directly execute file edits and terminal commands for automation.

Q: Is Agent Mode safe?​

Agent Mode requests confirmation before sensitive operations (like deleting files or running commands). Always use it in version-controlled repositories for easy rollback.

Q: Why can't I find the Agent Mode option?​

Ensure you have the latest Copilot Chat extension (v0.15+) and enable github.copilot.chat.agent.enabled in settings.

Q: What terminal commands can Agent Mode execute?​

Theoretically any command, but stick to safe development commands (like npm install, npm run build). Avoid high-risk operations like deletions or deployments.