Parallel AI coding agents leave nine kinds of disk junk, and the commands to clear them

Tools like Claude Code and Codex create git worktrees and branches during parallel sessions, but they do not always clean them up. Leftover worktree folders, stale records, locks, and branches can accumulate over weeks, consuming disk space, holding ports, and keeping git objects alive. The article describes nine categories of such leftovers, pairing a read-only command that finds each one with a command that removes it. It advises reviewing what the delete commands would remove before running them, and notes that the examples assume a main branch named main and agent branches with specific prefixes.