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I am working on a confidential project, so I ensure that only specific parts of the code are sent to Copilot Chat. To achieve this, I have disabled Copilot Completion and primarily use Copilot Chat. At the file level, I have disabled it entirely and only enable it for the specific range of code I select when necessary. In some cases, I include entire files, but only if I am certain they contain no confidential data. Otherwise, I use the traditional method of copying the code and pasting it into the chat.

The method I used to inspect network requests was to press Ctrl+Shift+P, type Developer: Toggle Developer Tools, and press Enter. A new window, similar to the Chromium browser, then opened. I inspected the network requests in the Network tab, started the Copilot conversation, and checked the Network DevTools again. However, no network requests related to GitHub or Copilot appeared.

Another method I tried was opening Copilot Chat in a new window. Then, I pressed Ctrl+Shift+P, typed Developer: Open Webview Developer Tools, and pressed Enter. However, no new window appeared.

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  • Maybe copilot is using sockets (1 persistent connection)? Commented Nov 29, 2024 at 12:03

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It's true that VSCode Developer Tool cannot inspect extension network because it's running under separate process called the Extension Host. You can take a look here but it seems complicated to setup https://stackoverflow.com/a/67099176/3789481

A simpler approach is to use Fiddler Classic as a forward proxy. By doing this, all API requests from VSCode will go through Fiddler, allowing you to inspect them, including HTTPS requests through TLS Inspection.

Fiddler setup:

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VSCode setup: enter image description here

After that, you can inspect for any *.githubcopilot.com directly, e.g. inline suggestion

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VSCode will send prompt and get response back as Content-Type: text/event-stream enter image description here

You can also inspect GHCP Chat with that same endpoint

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To view HTTPS traffic, I need to enable HTTPS decryption in Tools > Options > HTTPS. A popup will prompt me to install the root certificate, which I must complete to analyze HTTPS traffic successfully.

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