AI Coding Agents that run and test the code

Fine just released two features on Christmas and it's set to be an awesome 2025

Fine, the AI Coding Agent for Startups that connects to your GitHub and completes dev tasks for you, just dropped AI Sandboxing and Live Previews. Here's what it means:

Fine's AI Agents create a new branch to edit/create files in your codebase, using a unique Cloud Dev Environment for each task. Now, you can run the code in that same dev environment - no need to load up your IDE.

Watch your code compile in the console and if there are any errors, just copy and paste the logs into the chat for the Agent to fix.

You can also open a Live Preview to visually verify your changes. Share the Preview URL with colleagues to get feedback and for backend work, test with tools such as Postman.

Why this is important for developers

Imagine a world in which AI not only takes your specs and writes the code, but can run and test the code, compare it to the specs and fix itself. Where AI not only writes code that looks right and makes sense to the LLM’s logic, but verifies that it actually works - and meets the exact requirements you defined.

AI Sandboxing is not just another Cloud Dev Environment - it's the next step in achieving this.

With the help of your feedback on the current version of Live Previews, we’ll soon be setting our sights on releasing a complete self-assessing, self-improving AI coding agent - the first ever.

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