Your tool is cool, but is solves a different issue.
Right now, background agents have two major problems:
1. There is some friction to getting the isolated environment working correctly. Difficulty depends on specifics of each project. Ranging from "select this universal container" to "it's going to be hell getting all of your dependencies working". Working in your IDE pretty much solves that - it's likely a place where everything is already setup.
2. People need to learn how agents build code. Watching an agent work in your IDE while being able to interject/correct them is extremely helpful to long term success with background agents.
Right now, background agents have two major problems:
1. There is some friction to getting the isolated environment working correctly. Difficulty depends on specifics of each project. Ranging from "select this universal container" to "it's going to be hell getting all of your dependencies working". Working in your IDE pretty much solves that - it's likely a place where everything is already setup.
2. People need to learn how agents build code. Watching an agent work in your IDE while being able to interject/correct them is extremely helpful to long term success with background agents.