ChatArchive Reviewer Guide

1. Load `extensions/chatarchive/dist` as an unpacked Chrome extension.
2. Open a ChatGPT conversation at `https://chatgpt.com/`.
3. Click the extension action, then click Capture Chat.
4. Verify the preview contains ordered conversation text.
5. Download Markdown or JSON.

The MVP host permission is limited to ChatGPT. Claude, Gemini, and Perplexity are optional future hosts.