Elwood, the headless terminal wrangler

Field notes

The tool starts the actual agent CLI inside a hidden pseudo-terminal, allowing scripts to send prompts and collect plain text, JSON, or streamed events. Its examples include piping a Git diff or failing test output into the command, while the library exposes separate ClaudeSession and CodexSession classes. The page says sessions retain their normal tools, hooks, configuration, and login, and identifies the project as MIT licensed and maintained by Logic, Inc. in Seattle.