OAuth authentication (used with Free, Pro, and Max plans) is intended exclusively for Claude Code and Claude.ai. Using OAuth tokens obtained through Claude Free, Pro, or Max accounts in any other product, tool, or service — including the Agent SDK — is not permitted and constitutes a violation of the Consumer Terms of Service.

claude [--tmux] --worktree super-feature2

Run parallel Claude Code sessions with Git worktrees
When working on multiple tasks at once, you need each Claude session to have its own copy of the codebase so changes don’t collide. Git worktrees solve this by creating separate working directories that each have their own files and branch, while sharing the same repository history and remote connections. This means you can have Claude working on a feature in one worktree while fixing a bug in another, without either session interfering with the other.
Use the --worktree flag to create an isolated worktree and start Claude in it. The value you pass becomes the worktree directory name and branch name

I was charged $118 by Cursor for one message, it used 241 million tokens. The agent seemed to get stuck in a loop and context usage exploded and I was charged $118 of on-demand usage for a message with a few small files attached.