Parallel agents, no collisions
Several agents on one repository overwrite each other's files unless each has its own checkout. ace starts a thread in its own git worktree on its own branch, so you can run as many as you like and review each one on its own.
Review where the work happened
The Changes panel sits beside the conversation: a file tree with added and removed lines, the diff for the last turn or the whole branch, and line comments. Send comments to the agent as a request for changes, or approve and commit.
Open pull requests and issues as full pages, link them to the thread that wrote the code, and merge once checks pass.