I got frustrated switching from Arc to Chrome and losing `cmd+shift+C` to copy page URLs. Existing extensions were often unreliable.

So I built Arclet Copier. This post is the story of that journey, focusing on how I achieved near-native copy reliability by using Chrome's Offscreen Document API to overcome the limitations of traditional content script injection.

It also details my experience developing 99% of the extension with AI (Claude Code), consuming about 500M tokens in the process.