Hi @nhatchimai111,

You're on the right track with trying to exclude .env files from Copilot suggestions. However, Copilot does not currently guarantee exclusion of specific files unless explicitly configured. Here's a quick checklist to ensure all necessary configurations are in place:

Steps to Prevent Copilot from Accessing .env Files

1. Add to .copilot-ignore

Ensure your project has a .copilot-ignore file at the root with the following entry:

.env
.env.\*

Note: Copilot uses .copilot-ignore similar to .gitignore, but for suggestion control.

2. Update VS Code settings.json

In your workspace or global settings:

"copilot.exclude": [
  "**/.env",
  "**/.env.*"
]

This tells Copilot to avoid reading or suggesting content from these files.

3. Confirm .gitignore (optional but recommended)

While this doesn't impact Copilot directly, make sure .env is ignored by Git:

.env
.env.*

4. Restart VS Code

After applying changes, restart your VS Code instance to ensure all exclusions take effect.

If you've done all of the above and Copilot is still accessing .env content, it's worth reporting directly via the [GitHub Copilot feedback form](https://github.com/github/copilot/issues) or using the in-editor feedback tool.

Let me know if you'd like help reviewing your current .copilot-ignore and settings files.

🔒 Preventing Copilot from Reading .env Files

The reason your local configurations (.gitignore, settings.json) are not reliably preventing Copilot from accessing .env files is because GitHub Copilot's file exclusion feature is primarily managed server-side, and requires a paid tier.

1. The Official Solution (Requires Paid Subscription)

The only fully supported and guaranteed way to exclude files from Copilot's context is using the Content Exclusion feature, which is available only to users with Copilot Business or Copilot Enterprise subscriptions.

If your organization has the correct subscription, an administrator must set the exclusion rules at the organization level:

• Go to: GitHub Organization Settings → Copilot → Content exclusion.
• Set the rule: The exclusion rule must be defined using the appropriate syntax for the files you want to ignore.

Example Exclusion Rule:

"*":
  - "**/.env"
  - "**/.env.*"

2. The Local Workarounds (Less Reliable)

While the paid feature is the official solution, you can attempt to use these local configurations as a secondary measure:

Conclusion

If Copilot is ignoring your local settings and your primary goal is to prevent the exposure of sensitive environment variables, you must either:

1. Upgrade your Copilot subscription to Business/Enterprise and use the official Content Exclusion feature.
2. Move sensitive variables into a secure vault or secrets manager (like Azure Key Vault, AWS Secrets Manager, or GitHub Secrets) instead of keeping them in unencrypted .env files that must live in your project structure.

If Copilot is still reading your .env files even after configuration, it usually means the exclusions are not applied correctly or VS Code hasn’t reloaded them.

Follow these steps carefully to fully block access:

1. Update .copilot-ignore correctly
   Make sure this file exists in the root of your project and contains:
   .env
   .env.*
   **/.env
   */.env.

2. Verify .gitignore (for safety, but not enough alone)
   Add:
   .env
   .env.*
   Note: .gitignore alone does NOT stop Copilot, it just prevents commits.

3. Update VS Code settings.json
   Add these settings:
   {
   "files.exclude": {
   "/.env": true,
   "/.env.": true
   },
   "search.exclude": {
   "/.env": true,
   "/.env.": true
   },
   "github.copilot.advanced": {
   "excludedFiles": ["/.env", "/.env.*"]
   }
   }

4. Reload VS Code completely

• Close all VS Code windows
• Reopen the project
• Or run: “Developer: Reload Window”

5. Check Copilot Agent / Chat context

• Avoid opening .env files in the editor
• Copilot reads open/active files as context
• Close all .env tabs before using Copilot

6. Disable indexing (important for large projects)
   If you are using workspace indexing or extensions, they may still expose .env:

• Disable unnecessary extensions
• Rebuild workspace if needed

7. Test properly

• Open a normal code file
• Ask Copilot something unrelated
• Ensure it does NOT reference environment variables

If it STILL happens:

• It may be cached context → restart VS Code or system
• Or a Copilot limitation/bug → report to GitHub

Final note:
.copilot-ignore + settings.json + not opening .env files together is the reliable fix. Using only one of them is usually not enough.

Any update on May 2026??? So far what I understood is, and correct me if I'm wrong, that content exclusion is a paid feature and that .copilot-ignore is a myth. Workaround is telling AI "don't open .env" even tho it's not 100% it will comply.

If that is true, Github should be ashamed of themselves for not providing a simply scoping feature to files in client. Qwen has it, Claude, Codex etc...