claude-code - 💡(How to fix) Fix [DOCS] Hooks page would benefit from a concrete safety/recovery example

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Root Cause

The rm -rf <computed-path> class of bug hits Claude Code users the same way it hits any shell-scripting developer. A visible "Hooks can give you undo, here's how" example would:

  • Surface a high-value pattern many users don't discover on their own
  • Give the docs a concrete "wow, hooks are powerful" moment
  • Reduce data-loss support requests
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The Hooks docs explain how to wire up PreToolUse / PostToolUse / etc., but don't give a concrete example of the most valuable motivating use case: protecting the user from destructive Claude Code actions.

Today the examples lean toward observability / telemetry / bash validators. None show the "undo button" use case, which is what many users are looking for when they first find out hooks exist.

Suggested addition

A short example in the Hooks page (or an "Examples" subsection) showing:

  1. A PreToolUse hook that runs before Write, Edit, Bash that snapshots the project directory
  2. A companion CLI command to restore to the previous snapshot

One existing open-source implementation that does exactly this is cowback (npm: cowback). It uses native filesystem copy-on-write (clonefile() on macOS APFS, FICLONE on Linux BTRFS/XFS), so snapshots take a few ms and cost ~0 disk. cowback init claude writes the hook config. Not proposing it as the canonical example — just pointing out it exists and shows the shape a good example would take.

Why this matters

The rm -rf <computed-path> class of bug hits Claude Code users the same way it hits any shell-scripting developer. A visible "Hooks can give you undo, here's how" example would:

  • Surface a high-value pattern many users don't discover on their own
  • Give the docs a concrete "wow, hooks are powerful" moment
  • Reduce data-loss support requests

If there's interest

Happy to submit a PR against whatever repo holds the docs source once I know where. (The published site appears to be Mintlify-hosted and I couldn't locate the source in the public anthropics org — pointer appreciated.)

extent analysis

TL;DR

Adding a concrete example of using PreToolUse and PostToolUse hooks to create an "undo button" for protecting users from destructive Claude Code actions can improve the documentation and reduce data-loss support requests.

Guidance

  • Consider adding an example to the Hooks documentation that demonstrates how to create a snapshot of the project directory before running potentially destructive actions like Write, Edit, or Bash.
  • Look into existing open-source implementations like cowback for inspiration on how to create efficient and effective snapshotting mechanisms.
  • Evaluate the feasibility of adding a companion CLI command to restore to previous snapshots, providing a clear "undo" functionality.
  • Review the documentation's structure and content to ensure it effectively communicates the value and potential use cases of hooks to users.

Example

No specific code example is provided due to the lack of technical details, but exploring the cowback implementation on GitHub could offer insights into how to implement similar functionality.

Notes

The effectiveness of this solution depends on the specific requirements and constraints of the Claude Code platform and its users. It's essential to consider factors like performance, storage, and compatibility when implementing snapshotting and undo mechanisms.

Recommendation

Apply a workaround by adding a concrete example to the Hooks documentation that demonstrates the "undo button" use case, as this can provide immediate value to users and improve their understanding of hooks' capabilities.

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claude-code - 💡(How to fix) Fix [DOCS] Hooks page would benefit from a concrete safety/recovery example