Real AI agent use cases, with sources and setup prompts

Port an Electron app to Rust and Swift with coding agents

Vercel's CEO ported his Mini web browser from Electron and Bun to Rust and Swift, built with Opus 5.5 and Sol 6. It bundles up-to-date Chromium through the cef crate and embeds an agent that talks to his local CLI over ACP and controls the browser through an MCP server.

$4 in / $20 out per 1M tokensWeeksAdvancedSource linked

Source

@rauchg on X · 2026-09-28

Written in our own words. Credit to the original author. Link checked 2026-10-22.

What they did

Vercel's CEO ported his Mini web browser from Electron and Bun to Rust and Swift, built with Opus 5.5 and Sol 6. It bundles up-to-date Chromium through the cef crate and embeds an agent that talks to his local CLI over ACP and controls the browser through an MCP server.

Result (as claimed)

He reports it is faster, more secure, Mac-native with Liquid Glass and nicer to iterate on than the Electron version (1.5k likes).

Tools they used

Cost: Claude Opus 5.5: from $4 in / $20 out per 1M tokens.

Set it up

  1. Write a one-page brief

    Describe the app in plain words: who it is for, the 3 core screens or actions, and what "done" looks like.

  2. Start the project with your agent

    Open Claude Opus 5.5 and paste the brief. Ask it to propose a stack and a file plan before writing code.

  3. Build one slice at a time

    Ship the smallest working flow first, run it, then add features one by one. Commit after each working step.

  4. Test it like a user

    Click through on desktop and phone. Ask the agent to add basic tests and fix anything that breaks.

  5. Check security and ship

    Keep keys in environment variables, check auth and database rules, then deploy and share the link.

Copy the full setup prompt

Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.

You are helping me set up this AI use case end to end in Claude Code.

Goal: Port an Electron app to Rust and Swift with coding agents
What the original author did: Vercel's CEO ported his Mini web browser from Electron and Bun to Rust and Swift, built with Opus 5.5 and Sol 6. It bundles up-to-date Chromium through the cef crate and embeds an agent that talks to his local CLI over ACP and controls the browser through an MCP server.
Reported result (as claimed by the author): He reports it is faster, more secure, Mac-native with Liquid Glass and nicer to iterate on than the Electron version (1.5k likes).
Source: https://x.com/rauchg/status/2104428800134013205
Tools they used: Claude Opus 5.5, Sol 6, Rust, Swift, macOS
Category: Vibe coding & apps

Please:
1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like).
2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure.
3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data.
4. Finish with a checklist to run it again next time.

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Guides for this use case

How to port code to another language with AI · How to build an MCP server for AI agents · How to run multiple coding agents together

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