The Best AI Sandbox for QA Agents Runs the Whole Test Rig

The next generation of AI coding agents will be judged on their capacity to verify that code functions properly, making QA agents an emerging infrastructure challenge that demands full Linux VMs where the app, browser, test runner, database, worker, terminal, logs, screenshots, and trace files coexist on a single machine. Effective QA agents must boot the application, prepare test data, run browser tests, check visual output, read server logs, and compare artifacts — requiring a complete testing environment rather than a narrow code sandbox.