Skisso is a free Chrome extension for designers and developers who build with AI coding agents. Point at any element on your live product and edit it in your own design system: your tokens, your components, a shadcn/ui kit that matches your styles. Then hand your agent only the exact change, as a small diff or over MCP. No more describing pixels in prose or pasting the whole page: about 380 tokens instead of 25,700 in our test. Runs locally, no account.