It can make Claude Code move faster, but it removes the checks that make you stop and think. It skips nearly all permission gates, not just annoying popups: reading, editing, running commands, and overwriting work all happen with far less friction.
Picture an office master key. Normally an employee has keys to the lobby, conference room, and supply closet, and for the records room or server closet they have to ask. This flag hands them the master key and says “just keep working.” Fine if the person is trained, the building is empty, and you know the job. Not fine if they’re new, the rooms are full of client files, and nobody’s watching.
How it shows up
The flag isn’t evil; it belongs to someone who understands the room they’re unlocking. We think of it like employee access: a trusted admin can do real damage even with good intentions, and so can an agent with broad permissions. It’s useful for repetitive, low-risk work inside a controlled sandbox, and a bad idea in a live repo or client folder. This is where guardrails matter: a sandbox, a git branch, a backup, or a review step keeps speed inside boundaries you trust.
Why you care
The rule is simple. Don’t turn this on because you’re tired of clicking yes. Turn it on only when the area is scoped, the risk is understood, and you can inspect or recover the work. Always know which building you just unlocked.