Rauchg ports Mini browser to Rust and Swift

The rewrite bundles up-to-date Chromium via the cef crate and embeds an agent using fx acp, which communicates with his local fx CLI over ACP.

The fx CLI manages the browser through an MCP server, a pattern he documented in an MCP-over-ACP RFD on agentclientprotocol.

com.He reports faster boots, Safari-like Mac-native UX with Liquid Glass, and easier iteration than the Electron version.

I¹ ported my Mini web browser to Rust & Swift. It's faster, more secure, and shockingly, nicer to iterate on than Electron + Bun. I always wanted Safari-like UX but… Chrome 😁. Thanks to the 𝚌𝚎𝚏 crate, I can bundle up-to-date Chromium. 𝚏𝚡 𝚊𝚌𝚙 lets me embed an agent without bloating the app. It talks to my local fx CLI over ACP. fx can then manage the browser via an MCP server². By ditching Electron, I was able to get Liquid Glass, faster boots, and a more Mac-native feeling. Little things like fine-grained focus and input control, which are nightmare fuel in JS, just work®. Native is the future, both on the desktop and in the cloud. I suspect the entire software world will "nativify" faster than people realize, as DHH hinted at Rails World. Excited that Vercel's bet on Fluid will help support this, whether you choose to go Rust, Go, Zig, scriptc… ¹ fx.sh L0LzGsXKY with Opus 5.5 and Sol 6 ² In the process I learn agentclientprotocol.com/rfds/mcp-over-… JoQWFreGF, which I'm now really excited about. This will allow a more secure and direct way to expose MCP tools

This report is categorized under AITOP's "How-to" desk, focusing on US frontier AI labs and Silicon Valley technology leaders. Within our cross-regional analytical framework, it directly maps to AI developer toolchains, coding agents, and engineering workflows. Key entities and technical topics under continuous tracking include Rust, Swift, MCP, agents.

Source attribution: curated from Guillermo Rauch (@rauchg).