Your Claude Code session finally grew an undo button

What it does

ccundo is a CLI tool that piggybacks on Claude Code by reading its .jsonl session files from ~/.claude/projects/. It reconstructs the sequence of file edits, creations, deletions, renames, and bash commands, then lets you selectively revert or restore them with diff previews and automatic backups. It tracks state in ~/.ccundo/ and requires no configuration to get started.

The interesting bit

The tool treats operation history as a dependency chain: undoing one action automatically rolls back everything that came after it, and redoing similarly restores preceding undone operations. This cascading safety prevents the half-broken state you’d get from reverting a file edit while leaving its dependent file creation intact. Bash commands still require manual intervention, which is an honest admission of limits.

Key highlights

• Parses Claude Code session files directly; zero configuration needed
• Cascading undo/redo maintains project consistency by handling dependent operations
• Shows file diffs and change previews before modifying anything
• Creates backups in ~/.ccundo/backups/ before each revert
• Supports multiple languages including English, Japanese, French, Spanish, and German
• Tracks operations across multiple Claude Code sessions

Caveats

• Bash commands cannot be automatically undone or redone; they flag for manual intervention

Verdict

Keep it handy if you use Claude Code as a scratchpad and want surgical rollback between prompts without touching git. If you already version-control every micro-change, you won’t need it.