[FEATURE] Zero-Token Local Rollback via "Backup-First" for Redo and Undo

Hi Team,

I’m a daily user of Claude Code, and one recurring pain point I’ve encountered is reliably rolling back unintended or unsatisfactory edits.

Currently, reverting changes often requires:

• Sending another prompt (which consumes tokens and re-processes the file), or
• Manually undoing changes (which isn’t always reliable or not guaranteed to restore the exact previous state)

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💡 Proposal: Backup-First Execution Model

Introduce a “backup-first” mechanism before any file-modifying operation.

Backups should be handled using purely local commands (bash/shell/Windows commands), ensuring the fastest possible execution for undo, redo, and backup operations.

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🔧 How it would work

Before executing any file-changing tool call (e.g., edit_file, replace_content, write_file):

1. Automatically create a snapshot of the current file

• This should be done entirely using local bash/shell commands, without any LLM/AI involvement
• Example:
• file.js → file.js.bkp
• or store in .claude/backups/
• or maintain a lightweight version log (e.g., rollback_versions.txt)

1. Proceed with the modification as usual

1. Enable native commands that truly execute local operations:

• claude undo → restores the last version
• claude redo → reapplies reverted changes

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🔄 Execution Flow (Simple)

Before edit
→ Create backup (file.js → file.js.bkp)

After edit
→ Save updated file as the current version

Undo
→ Replace current file with backup version

Redo
→ Restore the next version from local history

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✅ Key Benefits

• ⚡ Instant rollback — no LLM round-trip

Zero latency, as it works using local bash or Windows copy-paste/replace commands.
It behaves like a small AI or tiny script running locally, enabling large operations instantly with a simple trigger—without worrying about parent AI token usage.
It follows exact, predictable patterns, requires no cross-check, and consistently delivers expected behavior.

• 💰 Zero token cost for undo/redo
• 🛡️ Safer experimentation, especially during large refactors
• 🌐 Works offline, independent of API availability
• 🎯 Deterministic restore — no risk of partial or incorrect rollback

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🧪 Working Proof (My Implementation)

I’ve already implemented a working version of this using Claude Code skills, and it performs reliably.

Highlights:

• Supports Undo/Redo for last ~10 sessions (configurable, stored locally)
• Maintains version history via:
• .bkp files, or
• structured history logs
• Undo/Redo works through direct file replacement, ensuring 100% accuracy
• No dependency on LLM calls → completely token-free

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🔁 Optional Enhancement

The system can optionally inform the LLM with a lightweight note like:

“Undo/Redo applied for last N sessions”

This helps maintain context awareness without reprocessing entire files.

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🎯 Summary

This feature would significantly improve developer productivity by making Claude Code:

• More reliable
• More cost-efficient
• Safer for iterative development

It aligns perfectly with real-world coding workflows where quick, deterministic rollback is essential.

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Thanks,
Jitendra