Snapmark · for GitHub Copilot Chat users
Annotate screenshots for GitHub Copilot Chat.
Copilot Chat accepts pasted images. Snapmark is a VS Code extension that sits in your clipboard: copy a screenshot, draw on it, paste. No Copilot Chat plugin, no extra window — just a cleaner image going into the same textbox you already use.
What Snapmark adds to the Copilot Chat workflow
Arrows and circles
Copilot Chat reads your image end-to-end. A red arrow pointing at the menu item you mean is cheaper and clearer than a three-sentence description of where it lives on the page.
Numbered steps for multi-stage bugs
Reproducing a regression in Copilot Chat is much easier when the screenshot itself carries 1 · 2 · 3 markers on the elements involved. One image, ordered actions, zero prose ambiguity.
Blur sensitive regions first
GitHub’s privacy posture around Copilot Chat is better than most, but you still shouldn’t send secrets you can avoid sending. Snapmark pixelates the region on the clipboard image before paste — the clear pixels never leave the extension.
The keystroke path
- 1. Copy a screenshot with your OS shortcut.
- 2. ⌘⇧A (Ctrl+Shift+A) opens the annotator inside VS Code.
- 3. Draw, click Copy. Snapmark writes the annotated PNG back to the clipboard, downscaled to the vision-model sweet spot.
- 4. Cmd+V into the Copilot Chat input. Copilot takes the image exactly the way it takes any other paste.
